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vendor: update grpc dependencies

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Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day
2017-05-25 16:52:15 -07:00
parent 26183b3a69
commit b626757d06
117 changed files with 40053 additions and 1867 deletions
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20
vendor/google.golang.org/grpc/README.md generated vendored
View File

@@ -1,4 +1,4 @@
#gRPC-Go
# gRPC-Go
[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) [![GoDoc](https://godoc.org/google.golang.org/grpc?status.svg)](https://godoc.org/google.golang.org/grpc)
@@ -16,23 +16,7 @@ $ go get google.golang.org/grpc
Prerequisites
-------------
This requires Go 1.5 or later.
A note on the version used: significant performance improvements in benchmarks
of grpc-go have been seen by upgrading the go version from 1.5 to the latest
1.7.1.
From https://golang.org/doc/install, one way to install the latest version of go is:
```
$ GO_VERSION=1.7.1
$ OS=linux
$ ARCH=amd64
$ curl -O https://storage.googleapis.com/golang/go${GO_VERSION}.${OS}-${ARCH}.tar.gz
$ sudo tar -C /usr/local -xzf go$GO_VERSION.$OS-$ARCH.tar.gz
$ # Put go on the PATH, keep the usual installation dir
$ sudo ln -s /usr/local/go/bin/go /usr/bin/go
$ rm go$GO_VERSION.$OS-$ARCH.tar.gz
```
This requires Go 1.6 or later.
Constraints
-----------

100
vendor/google.golang.org/grpc/call.go generated vendored
View File

@@ -36,13 +36,14 @@ package grpc
import (
"bytes"
"io"
"math"
"time"
"golang.org/x/net/context"
"golang.org/x/net/trace"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
@@ -66,34 +67,33 @@ func recvResponse(ctx context.Context, dopts dialOptions, t transport.ClientTran
}
p := &parser{r: stream}
var inPayload *stats.InPayload
if stats.On() {
if dopts.copts.StatsHandler != nil {
inPayload = &stats.InPayload{
Client: true,
}
}
for {
if err = recv(p, dopts.codec, stream, dopts.dc, reply, math.MaxInt32, inPayload); err != nil {
if err = recv(p, dopts.codec, stream, dopts.dc, reply, dopts.maxMsgSize, inPayload); err != nil {
if err == io.EOF {
break
}
return
}
}
if inPayload != nil && err == io.EOF && stream.StatusCode() == codes.OK {
if inPayload != nil && err == io.EOF && stream.Status().Code() == codes.OK {
// TODO in the current implementation, inTrailer may be handled before inPayload in some cases.
// Fix the order if necessary.
stats.HandleRPC(ctx, inPayload)
dopts.copts.StatsHandler.HandleRPC(ctx, inPayload)
}
c.trailerMD = stream.Trailer()
if peer, ok := peer.FromContext(stream.Context()); ok {
c.peer = peer
}
return nil
}
// sendRequest writes out various information of an RPC such as Context and Message.
func sendRequest(ctx context.Context, codec Codec, compressor Compressor, callHdr *transport.CallHdr, t transport.ClientTransport, args interface{}, opts *transport.Options) (_ *transport.Stream, err error) {
stream, err := t.NewStream(ctx, callHdr)
if err != nil {
return nil, err
}
func sendRequest(ctx context.Context, dopts dialOptions, compressor Compressor, callHdr *transport.CallHdr, stream *transport.Stream, t transport.ClientTransport, args interface{}, opts *transport.Options) (err error) {
defer func() {
if err != nil {
// If err is connection error, t will be closed, no need to close stream here.
@@ -109,28 +109,28 @@ func sendRequest(ctx context.Context, codec Codec, compressor Compressor, callHd
if compressor != nil {
cbuf = new(bytes.Buffer)
}
if stats.On() {
if dopts.copts.StatsHandler != nil {
outPayload = &stats.OutPayload{
Client: true,
}
}
outBuf, err := encode(codec, args, compressor, cbuf, outPayload)
outBuf, err := encode(dopts.codec, args, compressor, cbuf, outPayload)
if err != nil {
return nil, Errorf(codes.Internal, "grpc: %v", err)
return Errorf(codes.Internal, "grpc: %v", err)
}
err = t.Write(stream, outBuf, opts)
if err == nil && outPayload != nil {
outPayload.SentTime = time.Now()
stats.HandleRPC(ctx, outPayload)
dopts.copts.StatsHandler.HandleRPC(ctx, outPayload)
}
// t.NewStream(...) could lead to an early rejection of the RPC (e.g., the service/method
// does not exist.) so that t.Write could get io.EOF from wait(...). Leave the following
// recvResponse to get the final status.
if err != nil && err != io.EOF {
return nil, err
return err
}
// Sent successfully.
return stream, nil
return nil
}
// Invoke sends the RPC request on the wire and returns after response is received.
@@ -145,6 +145,14 @@ func Invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
func invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) (e error) {
c := defaultCallInfo
if mc, ok := cc.getMethodConfig(method); ok {
c.failFast = !mc.WaitForReady
if mc.Timeout > 0 {
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, mc.Timeout)
defer cancel()
}
}
for _, o := range opts {
if err := o.before(&c); err != nil {
return toRPCErr(err)
@@ -171,23 +179,25 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
}
}()
}
if stats.On() {
ctx = stats.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method})
ctx = newContextWithRPCInfo(ctx)
sh := cc.dopts.copts.StatsHandler
if sh != nil {
ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method})
begin := &stats.Begin{
Client: true,
BeginTime: time.Now(),
FailFast: c.failFast,
}
stats.HandleRPC(ctx, begin)
sh.HandleRPC(ctx, begin)
}
defer func() {
if stats.On() {
if sh != nil {
end := &stats.End{
Client: true,
EndTime: time.Now(),
Error: e,
}
stats.HandleRPC(ctx, end)
sh.HandleRPC(ctx, end)
}
}()
topts := &transport.Options{
@@ -211,13 +221,14 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
if cc.dopts.cp != nil {
callHdr.SendCompress = cc.dopts.cp.Type()
}
gopts := BalancerGetOptions{
BlockingWait: !c.failFast,
}
t, put, err = cc.getTransport(ctx, gopts)
if err != nil {
// TODO(zhaoq): Probably revisit the error handling.
if _, ok := err.(*rpcError); ok {
if _, ok := status.FromError(err); ok {
return err
}
if err == errConnClosing || err == errConnUnavailable {
@@ -232,19 +243,35 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
if c.traceInfo.tr != nil {
c.traceInfo.tr.LazyLog(&payload{sent: true, msg: args}, true)
}
stream, err = sendRequest(ctx, cc.dopts.codec, cc.dopts.cp, callHdr, t, args, topts)
stream, err = t.NewStream(ctx, callHdr)
if err != nil {
if put != nil {
if _, ok := err.(transport.ConnectionError); ok {
// If error is connection error, transport was sending data on wire,
// and we are not sure if anything has been sent on wire.
// If error is not connection error, we are sure nothing has been sent.
updateRPCInfoInContext(ctx, rpcInfo{bytesSent: true, bytesReceived: false})
}
put()
}
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
}
return toRPCErr(err)
}
err = sendRequest(ctx, cc.dopts, cc.dopts.cp, callHdr, stream, t, args, topts)
if err != nil {
if put != nil {
updateRPCInfoInContext(ctx, rpcInfo{
bytesSent: stream.BytesSent(),
bytesReceived: stream.BytesReceived(),
})
put()
put = nil
}
// Retry a non-failfast RPC when
// i) there is a connection error; or
// ii) the server started to drain before this RPC was initiated.
if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain {
if c.failFast {
return toRPCErr(err)
}
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
}
return toRPCErr(err)
@@ -252,13 +279,13 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
err = recvResponse(ctx, cc.dopts, t, &c, stream, reply)
if err != nil {
if put != nil {
updateRPCInfoInContext(ctx, rpcInfo{
bytesSent: stream.BytesSent(),
bytesReceived: stream.BytesReceived(),
})
put()
put = nil
}
if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain {
if c.failFast {
return toRPCErr(err)
}
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
}
return toRPCErr(err)
@@ -268,9 +295,12 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
}
t.CloseStream(stream, nil)
if put != nil {
updateRPCInfoInContext(ctx, rpcInfo{
bytesSent: stream.BytesSent(),
bytesReceived: stream.BytesReceived(),
})
put()
put = nil
}
return Errorf(stream.StatusCode(), "%s", stream.StatusDesc())
return stream.Status().Err()
}
}

247
vendor/google.golang.org/grpc/clientconn.go generated vendored
View File

@@ -36,8 +36,8 @@ package grpc
import (
"errors"
"fmt"
"math"
"net"
"strings"
"sync"
"time"
@@ -45,6 +45,8 @@ import (
"golang.org/x/net/trace"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/keepalive"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/transport"
)
@@ -54,6 +56,8 @@ var (
ErrClientConnClosing = errors.New("grpc: the client connection is closing")
// ErrClientConnTimeout indicates that the ClientConn cannot establish the
// underlying connections within the specified timeout.
// DEPRECATED: Please use context.DeadlineExceeded instead. This error will be
// removed in Q1 2017.
ErrClientConnTimeout = errors.New("grpc: timed out when dialing")
// errNoTransportSecurity indicates that there is no transport security
@@ -75,7 +79,6 @@ var (
errConnClosing = errors.New("grpc: the connection is closing")
// errConnUnavailable indicates that the connection is unavailable.
errConnUnavailable = errors.New("grpc: the connection is unavailable")
errNoAddr = errors.New("grpc: there is no address available to dial")
// minimum time to give a connection to complete
minConnectTimeout = 20 * time.Second
)
@@ -83,22 +86,33 @@ var (
// dialOptions configure a Dial call. dialOptions are set by the DialOption
// values passed to Dial.
type dialOptions struct {
unaryInt UnaryClientInterceptor
streamInt StreamClientInterceptor
codec Codec
cp Compressor
dc Decompressor
bs backoffStrategy
balancer Balancer
block bool
insecure bool
timeout time.Duration
copts transport.ConnectOptions
unaryInt UnaryClientInterceptor
streamInt StreamClientInterceptor
codec Codec
cp Compressor
dc Decompressor
bs backoffStrategy
balancer Balancer
block bool
insecure bool
timeout time.Duration
scChan <-chan ServiceConfig
copts transport.ConnectOptions
maxMsgSize int
}
const defaultClientMaxMsgSize = math.MaxInt32
// DialOption configures how we set up the connection.
type DialOption func(*dialOptions)
// WithMaxMsgSize returns a DialOption which sets the maximum message size the client can receive.
func WithMaxMsgSize(s int) DialOption {
return func(o *dialOptions) {
o.maxMsgSize = s
}
}
// WithCodec returns a DialOption which sets a codec for message marshaling and unmarshaling.
func WithCodec(c Codec) DialOption {
return func(o *dialOptions) {
@@ -129,6 +143,13 @@ func WithBalancer(b Balancer) DialOption {
}
}
// WithServiceConfig returns a DialOption which has a channel to read the service configuration.
func WithServiceConfig(c <-chan ServiceConfig) DialOption {
return func(o *dialOptions) {
o.scChan = c
}
}
// WithBackoffMaxDelay configures the dialer to use the provided maximum delay
// when backing off after failed connection attempts.
func WithBackoffMaxDelay(md time.Duration) DialOption {
@@ -212,6 +233,14 @@ func WithDialer(f func(string, time.Duration) (net.Conn, error)) DialOption {
}
}
// WithStatsHandler returns a DialOption that specifies the stats handler
// for all the RPCs and underlying network connections in this ClientConn.
func WithStatsHandler(h stats.Handler) DialOption {
return func(o *dialOptions) {
o.copts.StatsHandler = h
}
}
// FailOnNonTempDialError returns a DialOption that specified if gRPC fails on non-temporary dial errors.
// If f is true, and dialer returns a non-temporary error, gRPC will fail the connection to the network
// address and won't try to reconnect.
@@ -230,6 +259,13 @@ func WithUserAgent(s string) DialOption {
}
}
// WithKeepaliveParams returns a DialOption that specifies keepalive paramaters for the client transport.
func WithKeepaliveParams(kp keepalive.ClientParameters) DialOption {
return func(o *dialOptions) {
o.copts.KeepaliveParams = kp
}
}
// WithUnaryInterceptor returns a DialOption that specifies the interceptor for unary RPCs.
func WithUnaryInterceptor(f UnaryClientInterceptor) DialOption {
return func(o *dialOptions) {
@@ -244,6 +280,15 @@ func WithStreamInterceptor(f StreamClientInterceptor) DialOption {
}
}
// WithAuthority returns a DialOption that specifies the value to be used as
// the :authority pseudo-header. This value only works with WithInsecure and
// has no effect if TransportCredentials are present.
func WithAuthority(a string) DialOption {
return func(o *dialOptions) {
o.copts.Authority = a
}
}
// Dial creates a client connection to the given target.
func Dial(target string, opts ...DialOption) (*ClientConn, error) {
return DialContext(context.Background(), target, opts...)
@@ -260,6 +305,32 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
conns: make(map[Address]*addrConn),
}
cc.ctx, cc.cancel = context.WithCancel(context.Background())
cc.dopts.maxMsgSize = defaultClientMaxMsgSize
for _, opt := range opts {
opt(&cc.dopts)
}
cc.mkp = cc.dopts.copts.KeepaliveParams
if cc.dopts.copts.Dialer == nil {
cc.dopts.copts.Dialer = newProxyDialer(
func(ctx context.Context, addr string) (net.Conn, error) {
return dialContext(ctx, "tcp", addr)
},
)
}
if cc.dopts.copts.UserAgent != "" {
cc.dopts.copts.UserAgent += " " + grpcUA
} else {
cc.dopts.copts.UserAgent = grpcUA
}
if cc.dopts.timeout > 0 {
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, cc.dopts.timeout)
defer cancel()
}
defer func() {
select {
case <-ctx.Done():
@@ -272,10 +343,17 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
}
}()
for _, opt := range opts {
opt(&cc.dopts)
if cc.dopts.scChan != nil {
// Wait for the initial service config.
select {
case sc, ok := <-cc.dopts.scChan:
if ok {
cc.sc = sc
}
case <-ctx.Done():
return nil, ctx.Err()
}
}
// Set defaults.
if cc.dopts.codec == nil {
cc.dopts.codec = protoCodec{}
@@ -286,21 +364,18 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
creds := cc.dopts.copts.TransportCredentials
if creds != nil && creds.Info().ServerName != "" {
cc.authority = creds.Info().ServerName
} else if cc.dopts.insecure && cc.dopts.copts.Authority != "" {
cc.authority = cc.dopts.copts.Authority
} else {
colonPos := strings.LastIndex(target, ":")
if colonPos == -1 {
colonPos = len(target)
}
cc.authority = target[:colonPos]
cc.authority = target
}
var ok bool
waitC := make(chan error, 1)
go func() {
var addrs []Address
if cc.dopts.balancer == nil {
// Connect to target directly if balancer is nil.
addrs = append(addrs, Address{Addr: target})
} else {
defer close(waitC)
if cc.dopts.balancer == nil && cc.sc.LB != nil {
cc.dopts.balancer = cc.sc.LB
}
if cc.dopts.balancer != nil {
var credsClone credentials.TransportCredentials
if creds != nil {
credsClone = creds.Clone()
@@ -313,29 +388,23 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
return
}
ch := cc.dopts.balancer.Notify()
if ch == nil {
// There is no name resolver installed.
addrs = append(addrs, Address{Addr: target})
} else {
addrs, ok = <-ch
if !ok || len(addrs) == 0 {
waitC <- errNoAddr
return
if ch != nil {
if cc.dopts.block {
doneChan := make(chan struct{})
go cc.lbWatcher(doneChan)
<-doneChan
} else {
go cc.lbWatcher(nil)
}
}
}
for _, a := range addrs {
if err := cc.resetAddrConn(a, false, nil); err != nil {
waitC <- err
return
}
}
close(waitC)
// No balancer, or no resolver within the balancer. Connect directly.
if err := cc.resetAddrConn(Address{Addr: target}, cc.dopts.block, nil); err != nil {
waitC <- err
return
}
}()
var timeoutCh <-chan time.Time
if cc.dopts.timeout > 0 {
timeoutCh = time.After(cc.dopts.timeout)
}
select {
case <-ctx.Done():
return nil, ctx.Err()
@@ -343,14 +412,12 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
if err != nil {
return nil, err
}
case <-timeoutCh:
return nil, ErrClientConnTimeout
}
// If balancer is nil or balancer.Notify() is nil, ok will be false here.
// The lbWatcher goroutine will not be created.
if ok {
go cc.lbWatcher()
if cc.dopts.scChan != nil {
go cc.scWatcher()
}
return cc, nil
}
@@ -397,10 +464,16 @@ type ClientConn struct {
dopts dialOptions
mu sync.RWMutex
sc ServiceConfig
conns map[Address]*addrConn
// Keepalive parameter can be udated if a GoAway is received.
mkp keepalive.ClientParameters
}
func (cc *ClientConn) lbWatcher() {
// lbWatcher watches the Notify channel of the balancer in cc and manages
// connections accordingly. If doneChan is not nil, it is closed after the
// first successfull connection is made.
func (cc *ClientConn) lbWatcher(doneChan chan struct{}) {
for addrs := range cc.dopts.balancer.Notify() {
var (
add []Address // Addresses need to setup connections.
@@ -427,7 +500,15 @@ func (cc *ClientConn) lbWatcher() {
}
cc.mu.Unlock()
for _, a := range add {
cc.resetAddrConn(a, true, nil)
if doneChan != nil {
err := cc.resetAddrConn(a, true, nil)
if err == nil {
close(doneChan)
doneChan = nil
}
} else {
cc.resetAddrConn(a, false, nil)
}
}
for _, c := range del {
c.tearDown(errConnDrain)
@@ -435,15 +516,36 @@ func (cc *ClientConn) lbWatcher() {
}
}
func (cc *ClientConn) scWatcher() {
for {
select {
case sc, ok := <-cc.dopts.scChan:
if !ok {
return
}
cc.mu.Lock()
// TODO: load balance policy runtime change is ignored.
// We may revist this decision in the future.
cc.sc = sc
cc.mu.Unlock()
case <-cc.ctx.Done():
return
}
}
}
// resetAddrConn creates an addrConn for addr and adds it to cc.conns.
// If there is an old addrConn for addr, it will be torn down, using tearDownErr as the reason.
// If tearDownErr is nil, errConnDrain will be used instead.
func (cc *ClientConn) resetAddrConn(addr Address, skipWait bool, tearDownErr error) error {
func (cc *ClientConn) resetAddrConn(addr Address, block bool, tearDownErr error) error {
ac := &addrConn{
cc: cc,
addr: addr,
dopts: cc.dopts,
}
cc.mu.RLock()
ac.dopts.copts.KeepaliveParams = cc.mkp
cc.mu.RUnlock()
ac.ctx, ac.cancel = context.WithCancel(cc.ctx)
ac.stateCV = sync.NewCond(&ac.mu)
if EnableTracing {
@@ -488,8 +590,7 @@ func (cc *ClientConn) resetAddrConn(addr Address, skipWait bool, tearDownErr err
stale.tearDown(tearDownErr)
}
}
// skipWait may overwrite the decision in ac.dopts.block.
if ac.dopts.block && !skipWait {
if block {
if err := ac.resetTransport(false); err != nil {
if err != errConnClosing {
// Tear down ac and delete it from cc.conns.
@@ -522,6 +623,14 @@ func (cc *ClientConn) resetAddrConn(addr Address, skipWait bool, tearDownErr err
return nil
}
// TODO: Avoid the locking here.
func (cc *ClientConn) getMethodConfig(method string) (m MethodConfig, ok bool) {
cc.mu.RLock()
defer cc.mu.RUnlock()
m, ok = cc.sc.Methods[method]
return
}
func (cc *ClientConn) getTransport(ctx context.Context, opts BalancerGetOptions) (transport.ClientTransport, func(), error) {
var (
ac *addrConn
@@ -560,6 +669,7 @@ func (cc *ClientConn) getTransport(ctx context.Context, opts BalancerGetOptions)
}
if !ok {
if put != nil {
updateRPCInfoInContext(ctx, rpcInfo{bytesSent: false, bytesReceived: false})
put()
}
return nil, nil, errConnClosing
@@ -567,6 +677,7 @@ func (cc *ClientConn) getTransport(ctx context.Context, opts BalancerGetOptions)
t, err := ac.wait(ctx, cc.dopts.balancer != nil, !opts.BlockingWait)
if err != nil {
if put != nil {
updateRPCInfoInContext(ctx, rpcInfo{bytesSent: false, bytesReceived: false})
put()
}
return nil, nil, err
@@ -618,6 +729,20 @@ type addrConn struct {
tearDownErr error
}
// adjustParams updates parameters used to create transports upon
// receiving a GoAway.
func (ac *addrConn) adjustParams(r transport.GoAwayReason) {
switch r {
case transport.TooManyPings:
v := 2 * ac.dopts.copts.KeepaliveParams.Time
ac.cc.mu.Lock()
if v > ac.cc.mkp.Time {
ac.cc.mkp.Time = v
}
ac.cc.mu.Unlock()
}
}
// printf records an event in ac's event log, unless ac has been closed.
// REQUIRES ac.mu is held.
func (ac *addrConn) printf(format string, a ...interface{}) {
@@ -702,6 +827,8 @@ func (ac *addrConn) resetTransport(closeTransport bool) error {
Metadata: ac.addr.Metadata,
}
newTransport, err := transport.NewClientTransport(ctx, sinfo, ac.dopts.copts)
// Don't call cancel in success path due to a race in Go 1.6:
// https://github.com/golang/go/issues/15078.
if err != nil {
cancel()
@@ -772,6 +899,7 @@ func (ac *addrConn) transportMonitor() {
}
return
case <-t.GoAway():
ac.adjustParams(t.GetGoAwayReason())
// If GoAway happens without any network I/O error, ac is closed without shutting down the
// underlying transport (the transport will be closed when all the pending RPCs finished or
// failed.).
@@ -780,9 +908,9 @@ func (ac *addrConn) transportMonitor() {
// In both cases, a new ac is created.
select {
case <-t.Error():
ac.cc.resetAddrConn(ac.addr, true, errNetworkIO)
ac.cc.resetAddrConn(ac.addr, false, errNetworkIO)
default:
ac.cc.resetAddrConn(ac.addr, true, errConnDrain)
ac.cc.resetAddrConn(ac.addr, false, errConnDrain)
}
return
case <-t.Error():
@@ -791,7 +919,8 @@ func (ac *addrConn) transportMonitor() {
t.Close()
return
case <-t.GoAway():
ac.cc.resetAddrConn(ac.addr, true, errNetworkIO)
ac.adjustParams(t.GetGoAwayReason())
ac.cc.resetAddrConn(ac.addr, false, errNetworkIO)
return
default:
}

118
vendor/google.golang.org/grpc/codec.go generated vendored Normal file
View File

@@ -0,0 +1,118 @@
/*
*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package grpc
import (
"math"
"sync"
"github.com/golang/protobuf/proto"
)
// Codec defines the interface gRPC uses to encode and decode messages.
// Note that implementations of this interface must be thread safe;
// a Codec's methods can be called from concurrent goroutines.
type Codec interface {
// Marshal returns the wire format of v.
Marshal(v interface{}) ([]byte, error)
// Unmarshal parses the wire format into v.
Unmarshal(data []byte, v interface{}) error
// String returns the name of the Codec implementation. The returned
// string will be used as part of content type in transmission.
String() string
}
// protoCodec is a Codec implementation with protobuf. It is the default codec for gRPC.
type protoCodec struct {
}
type cachedProtoBuffer struct {
lastMarshaledSize uint32
proto.Buffer
}
func capToMaxInt32(val int) uint32 {
if val > math.MaxInt32 {
return uint32(math.MaxInt32)
}
return uint32(val)
}
func (p protoCodec) marshal(v interface{}, cb *cachedProtoBuffer) ([]byte, error) {
protoMsg := v.(proto.Message)
newSlice := make([]byte, 0, cb.lastMarshaledSize)
cb.SetBuf(newSlice)
cb.Reset()
if err := cb.Marshal(protoMsg); err != nil {
return nil, err
}
out := cb.Bytes()
cb.lastMarshaledSize = capToMaxInt32(len(out))
return out, nil
}
func (p protoCodec) Marshal(v interface{}) ([]byte, error) {
cb := protoBufferPool.Get().(*cachedProtoBuffer)
out, err := p.marshal(v, cb)
// put back buffer and lose the ref to the slice
cb.SetBuf(nil)
protoBufferPool.Put(cb)
return out, err
}
func (p protoCodec) Unmarshal(data []byte, v interface{}) error {
cb := protoBufferPool.Get().(*cachedProtoBuffer)
cb.SetBuf(data)
err := cb.Unmarshal(v.(proto.Message))
cb.SetBuf(nil)
protoBufferPool.Put(cb)
return err
}
func (protoCodec) String() string {
return "proto"
}
var (
protoBufferPool = &sync.Pool{
New: func() interface{} {
return &cachedProtoBuffer{
Buffer: proto.Buffer{},
lastMarshaledSize: 16,
}
},
}
)

8
vendor/google.golang.org/grpc/credentials/credentials.go generated vendored
View File

@@ -102,6 +102,10 @@ type TransportCredentials interface {
// authentication protocol on rawConn for clients. It returns the authenticated
// connection and the corresponding auth information about the connection.
// Implementations must use the provided context to implement timely cancellation.
// gRPC will try to reconnect if the error returned is a temporary error
// (io.EOF, context.DeadlineExceeded or err.Temporary() == true).
// If the returned error is a wrapper error, implementations should make sure that
// the error implements Temporary() to have the correct retry behaviors.
ClientHandshake(context.Context, string, net.Conn) (net.Conn, AuthInfo, error)
// ServerHandshake does the authentication handshake for servers. It returns
// the authenticated connection and the corresponding auth information about
@@ -165,9 +169,7 @@ func (c *tlsCreds) ClientHandshake(ctx context.Context, addr string, rawConn net
case <-ctx.Done():
return nil, nil, ctx.Err()
}
// TODO(zhaoq): Omit the auth info for client now. It is more for
// information than anything else.
return conn, nil, nil
return conn, TLSInfo{conn.ConnectionState()}, nil
}
func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error) {

3
vendor/google.golang.org/grpc/credentials/credentials_util_go17.go generated vendored
View File

@@ -1,4 +1,5 @@
// +build go1.7
// +build !go1.8
/*
*
@@ -44,8 +45,6 @@ import (
// contains a mutex and must not be copied.
//
// If cfg is nil, a new zero tls.Config is returned.
//
// TODO replace this function with official clone function.
func cloneTLSConfig(cfg *tls.Config) *tls.Config {
if cfg == nil {
return &tls.Config{}

53
vendor/google.golang.org/grpc/credentials/credentials_util_go18.go generated vendored Normal file
View File

@@ -0,0 +1,53 @@
// +build go1.8
/*
*
* Copyright 2017, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package credentials
import (
"crypto/tls"
)
// cloneTLSConfig returns a shallow clone of the exported
// fields of cfg, ignoring the unexported sync.Once, which
// contains a mutex and must not be copied.
//
// If cfg is nil, a new zero tls.Config is returned.
func cloneTLSConfig(cfg *tls.Config) *tls.Config {
if cfg == nil {
return &tls.Config{}
}
return cfg.Clone()
}

2
vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go generated vendored
View File

@@ -44,8 +44,6 @@ import (
// contains a mutex and must not be copied.
//
// If cfg is nil, a new zero tls.Config is returned.
//
// TODO replace this function with official clone function.
func cloneTLSConfig(cfg *tls.Config) *tls.Config {
if cfg == nil {
return &tls.Config{}

56
vendor/google.golang.org/grpc/go16.go generated vendored Normal file
View File

@@ -0,0 +1,56 @@
// +build go1.6,!go1.7
/*
* Copyright 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package grpc
import (
"fmt"
"net"
"net/http"
"golang.org/x/net/context"
)
// dialContext connects to the address on the named network.
func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
}
func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
req.Cancel = ctx.Done()
if err := req.Write(conn); err != nil {
return fmt.Errorf("failed to write the HTTP request: %v", err)
}
return nil
}

20
vendor/google.golang.org/grpc/transport/pre_go16.go → vendor/google.golang.org/grpc/go17.go generated vendored
View File

@@ -1,4 +1,4 @@
// +build !go1.6
// +build go1.7
/*
* Copyright 2016, Google Inc.
@@ -32,20 +32,24 @@
*
*/
package transport
package grpc
import (
"net"
"time"
"net/http"
"golang.org/x/net/context"
)
// dialContext connects to the address on the named network.
func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
var dialer net.Dialer
if deadline, ok := ctx.Deadline(); ok {
dialer.Timeout = deadline.Sub(time.Now())
}
return dialer.Dial(network, address)
return (&net.Dialer{}).DialContext(ctx, network, address)
}
func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
req = req.WithContext(ctx)
if err := req.Write(conn); err != nil {
return err
}
return nil
}

749
vendor/google.golang.org/grpc/grpclb.go generated vendored Normal file
View File

@@ -0,0 +1,749 @@
/*
*
* Copyright 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package grpc
import (
"errors"
"fmt"
"math/rand"
"net"
"sync"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/naming"
)
// Client API for LoadBalancer service.
// Mostly copied from generated pb.go file.
// To avoid circular dependency.
type loadBalancerClient struct {
cc *ClientConn
}
func (c *loadBalancerClient) BalanceLoad(ctx context.Context, opts ...CallOption) (*balanceLoadClientStream, error) {
desc := &StreamDesc{
StreamName: "BalanceLoad",
ServerStreams: true,
ClientStreams: true,
}
stream, err := NewClientStream(ctx, desc, c.cc, "/grpc.lb.v1.LoadBalancer/BalanceLoad", opts...)
if err != nil {
return nil, err
}
x := &balanceLoadClientStream{stream}
return x, nil
}
type balanceLoadClientStream struct {
ClientStream
}
func (x *balanceLoadClientStream) Send(m *lbpb.LoadBalanceRequest) error {
return x.ClientStream.SendMsg(m)
}
func (x *balanceLoadClientStream) Recv() (*lbpb.LoadBalanceResponse, error) {
m := new(lbpb.LoadBalanceResponse)
if err := x.ClientStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
// AddressType indicates the address type returned by name resolution.
type AddressType uint8
const (
// Backend indicates the server is a backend server.
Backend AddressType = iota
// GRPCLB indicates the server is a grpclb load balancer.
GRPCLB
)
// AddrMetadataGRPCLB contains the information the name resolution for grpclb should provide. The
// name resolver used by grpclb balancer is required to provide this type of metadata in
// its address updates.
type AddrMetadataGRPCLB struct {
// AddrType is the type of server (grpc load balancer or backend).
AddrType AddressType
// ServerName is the name of the grpc load balancer. Used for authentication.
ServerName string
}
// NewGRPCLBBalancer creates a grpclb load balancer.
func NewGRPCLBBalancer(r naming.Resolver) Balancer {
return &balancer{
r: r,
}
}
type remoteBalancerInfo struct {
addr string
// the server name used for authentication with the remote LB server.
name string
}
// grpclbAddrInfo consists of the information of a backend server.
type grpclbAddrInfo struct {
addr Address
connected bool
// dropForRateLimiting indicates whether this particular request should be
// dropped by the client for rate limiting.
dropForRateLimiting bool
// dropForLoadBalancing indicates whether this particular request should be
// dropped by the client for load balancing.
dropForLoadBalancing bool
}
type balancer struct {
r naming.Resolver
target string
mu sync.Mutex
seq int // a sequence number to make sure addrCh does not get stale addresses.
w naming.Watcher
addrCh chan []Address
rbs []remoteBalancerInfo
addrs []*grpclbAddrInfo
next int
waitCh chan struct{}
done bool
expTimer *time.Timer
rand *rand.Rand
clientStats lbpb.ClientStats
}
func (b *balancer) watchAddrUpdates(w naming.Watcher, ch chan []remoteBalancerInfo) error {
updates, err := w.Next()
if err != nil {
return err
}
b.mu.Lock()
defer b.mu.Unlock()
if b.done {
return ErrClientConnClosing
}
for _, update := range updates {
switch update.Op {
case naming.Add:
var exist bool
for _, v := range b.rbs {
// TODO: Is the same addr with different server name a different balancer?
if update.Addr == v.addr {
exist = true
break
}
}
if exist {
continue
}
md, ok := update.Metadata.(*AddrMetadataGRPCLB)
if !ok {
// TODO: Revisit the handling here and may introduce some fallback mechanism.
grpclog.Printf("The name resolution contains unexpected metadata %v", update.Metadata)
continue
}
switch md.AddrType {
case Backend:
// TODO: Revisit the handling here and may introduce some fallback mechanism.
grpclog.Printf("The name resolution does not give grpclb addresses")
continue
case GRPCLB:
b.rbs = append(b.rbs, remoteBalancerInfo{
addr: update.Addr,
name: md.ServerName,
})
default:
grpclog.Printf("Received unknow address type %d", md.AddrType)
continue
}
case naming.Delete:
for i, v := range b.rbs {
if update.Addr == v.addr {
copy(b.rbs[i:], b.rbs[i+1:])
b.rbs = b.rbs[:len(b.rbs)-1]
break
}
}
default:
grpclog.Println("Unknown update.Op ", update.Op)
}
}
// TODO: Fall back to the basic round-robin load balancing if the resulting address is
// not a load balancer.
select {
case <-ch:
default:
}
ch <- b.rbs
return nil
}
func (b *balancer) serverListExpire(seq int) {
b.mu.Lock()
defer b.mu.Unlock()
// TODO: gRPC interanls do not clear the connections when the server list is stale.
// This means RPCs will keep using the existing server list until b receives new
// server list even though the list is expired. Revisit this behavior later.
if b.done || seq < b.seq {
return
}
b.next = 0
b.addrs = nil
// Ask grpc internals to close all the corresponding connections.
b.addrCh <- nil
}
func convertDuration(d *lbpb.Duration) time.Duration {
if d == nil {
return 0
}
return time.Duration(d.Seconds)*time.Second + time.Duration(d.Nanos)*time.Nanosecond
}
func (b *balancer) processServerList(l *lbpb.ServerList, seq int) {
if l == nil {
return
}
servers := l.GetServers()
expiration := convertDuration(l.GetExpirationInterval())
var (
sl []*grpclbAddrInfo
addrs []Address
)
for _, s := range servers {
md := metadata.Pairs("lb-token", s.LoadBalanceToken)
addr := Address{
Addr: fmt.Sprintf("%s:%d", net.IP(s.IpAddress), s.Port),
Metadata: &md,
}
sl = append(sl, &grpclbAddrInfo{
addr: addr,
dropForRateLimiting: s.DropForRateLimiting,
dropForLoadBalancing: s.DropForLoadBalancing,
})
addrs = append(addrs, addr)
}
b.mu.Lock()
defer b.mu.Unlock()
if b.done || seq < b.seq {
return
}
if len(sl) > 0 {
// reset b.next to 0 when replacing the server list.
b.next = 0
b.addrs = sl
b.addrCh <- addrs
if b.expTimer != nil {
b.expTimer.Stop()
b.expTimer = nil
}
if expiration > 0 {
b.expTimer = time.AfterFunc(expiration, func() {
b.serverListExpire(seq)
})
}
}
return
}
func (b *balancer) sendLoadReport(s *balanceLoadClientStream, interval time.Duration, done <-chan struct{}) {
ticker := time.NewTicker(interval)
defer ticker.Stop()
for {
select {
case <-ticker.C:
case <-done:
return
}
b.mu.Lock()
stats := b.clientStats
b.clientStats = lbpb.ClientStats{} // Clear the stats.
b.mu.Unlock()
t := time.Now()
stats.Timestamp = &lbpb.Timestamp{
Seconds: t.Unix(),
Nanos: int32(t.Nanosecond()),
}
if err := s.Send(&lbpb.LoadBalanceRequest{
LoadBalanceRequestType: &lbpb.LoadBalanceRequest_ClientStats{
ClientStats: &stats,
},
}); err != nil {
return
}
}
}
func (b *balancer) callRemoteBalancer(lbc *loadBalancerClient, seq int) (retry bool) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
stream, err := lbc.BalanceLoad(ctx)
if err != nil {
grpclog.Printf("Failed to perform RPC to the remote balancer %v", err)
return
}
b.mu.Lock()
if b.done {
b.mu.Unlock()
return
}
b.mu.Unlock()
initReq := &lbpb.LoadBalanceRequest{
LoadBalanceRequestType: &lbpb.LoadBalanceRequest_InitialRequest{
InitialRequest: &lbpb.InitialLoadBalanceRequest{
Name: b.target,
},
},
}
if err := stream.Send(initReq); err != nil {
// TODO: backoff on retry?
return true
}
reply, err := stream.Recv()
if err != nil {
// TODO: backoff on retry?
return true
}
initResp := reply.GetInitialResponse()
if initResp == nil {
grpclog.Println("Failed to receive the initial response from the remote balancer.")
return
}
// TODO: Support delegation.
if initResp.LoadBalancerDelegate != "" {
// delegation
grpclog.Println("TODO: Delegation is not supported yet.")
return
}
streamDone := make(chan struct{})
defer close(streamDone)
b.mu.Lock()
b.clientStats = lbpb.ClientStats{} // Clear client stats.
b.mu.Unlock()
if d := convertDuration(initResp.ClientStatsReportInterval); d > 0 {
go b.sendLoadReport(stream, d, streamDone)
}
// Retrieve the server list.
for {
reply, err := stream.Recv()
if err != nil {
break
}
b.mu.Lock()
if b.done || seq < b.seq {
b.mu.Unlock()
return
}
b.seq++ // tick when receiving a new list of servers.
seq = b.seq
b.mu.Unlock()
if serverList := reply.GetServerList(); serverList != nil {
b.processServerList(serverList, seq)
}
}
return true
}
func (b *balancer) Start(target string, config BalancerConfig) error {
b.rand = rand.New(rand.NewSource(time.Now().Unix()))
// TODO: Fall back to the basic direct connection if there is no name resolver.
if b.r == nil {
return errors.New("there is no name resolver installed")
}
b.target = target
b.mu.Lock()
if b.done {
b.mu.Unlock()
return ErrClientConnClosing
}
b.addrCh = make(chan []Address)
w, err := b.r.Resolve(target)
if err != nil {
b.mu.Unlock()
return err
}
b.w = w
b.mu.Unlock()
balancerAddrsCh := make(chan []remoteBalancerInfo, 1)
// Spawn a goroutine to monitor the name resolution of remote load balancer.
go func() {
for {
if err := b.watchAddrUpdates(w, balancerAddrsCh); err != nil {
grpclog.Printf("grpc: the naming watcher stops working due to %v.\n", err)
close(balancerAddrsCh)
return
}
}
}()
// Spawn a goroutine to talk to the remote load balancer.
go func() {
var (
cc *ClientConn
// ccError is closed when there is an error in the current cc.
// A new rb should be picked from rbs and connected.
ccError chan struct{}
rb *remoteBalancerInfo
rbs []remoteBalancerInfo
rbIdx int
)
defer func() {
if ccError != nil {
select {
case <-ccError:
default:
close(ccError)
}
}
if cc != nil {
cc.Close()
}
}()
for {
var ok bool
select {
case rbs, ok = <-balancerAddrsCh:
if !ok {
return
}
foundIdx := -1
if rb != nil {
for i, trb := range rbs {
if trb == *rb {
foundIdx = i
break
}
}
}
if foundIdx >= 0 {
if foundIdx >= 1 {
// Move the address in use to the beginning of the list.
b.rbs[0], b.rbs[foundIdx] = b.rbs[foundIdx], b.rbs[0]
rbIdx = 0
}
continue // If found, don't dial new cc.
} else if len(rbs) > 0 {
// Pick a random one from the list, instead of always using the first one.
if l := len(rbs); l > 1 && rb != nil {
tmpIdx := b.rand.Intn(l - 1)
b.rbs[0], b.rbs[tmpIdx] = b.rbs[tmpIdx], b.rbs[0]
}
rbIdx = 0
rb = &rbs[0]
} else {
// foundIdx < 0 && len(rbs) <= 0.
rb = nil
}
case <-ccError:
ccError = nil
if rbIdx < len(rbs)-1 {
rbIdx++
rb = &rbs[rbIdx]
} else {
rb = nil
}
}
if rb == nil {
continue
}
if cc != nil {
cc.Close()
}
// Talk to the remote load balancer to get the server list.
var err error
creds := config.DialCreds
ccError = make(chan struct{})
if creds == nil {
cc, err = Dial(rb.addr, WithInsecure())
} else {
if rb.name != "" {
if err := creds.OverrideServerName(rb.name); err != nil {
grpclog.Printf("Failed to override the server name in the credentials: %v", err)
continue
}
}
cc, err = Dial(rb.addr, WithTransportCredentials(creds))
}
if err != nil {
grpclog.Printf("Failed to setup a connection to the remote balancer %v: %v", rb.addr, err)
close(ccError)
continue
}
b.mu.Lock()
b.seq++ // tick when getting a new balancer address
seq := b.seq
b.next = 0
b.mu.Unlock()
go func(cc *ClientConn, ccError chan struct{}) {
lbc := &loadBalancerClient{cc}
b.callRemoteBalancer(lbc, seq)
cc.Close()
select {
case <-ccError:
default:
close(ccError)
}
}(cc, ccError)
}
}()
return nil
}
func (b *balancer) down(addr Address, err error) {
b.mu.Lock()
defer b.mu.Unlock()
for _, a := range b.addrs {
if addr == a.addr {
a.connected = false
break
}
}
}
func (b *balancer) Up(addr Address) func(error) {
b.mu.Lock()
defer b.mu.Unlock()
if b.done {
return nil
}
var cnt int
for _, a := range b.addrs {
if a.addr == addr {
if a.connected {
return nil
}
a.connected = true
}
if a.connected && !a.dropForRateLimiting && !a.dropForLoadBalancing {
cnt++
}
}
// addr is the only one which is connected. Notify the Get() callers who are blocking.
if cnt == 1 && b.waitCh != nil {
close(b.waitCh)
b.waitCh = nil
}
return func(err error) {
b.down(addr, err)
}
}
func (b *balancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) {
var ch chan struct{}
b.mu.Lock()
if b.done {
b.mu.Unlock()
err = ErrClientConnClosing
return
}
seq := b.seq
defer func() {
if err != nil {
return
}
put = func() {
s, ok := rpcInfoFromContext(ctx)
if !ok {
return
}
b.mu.Lock()
defer b.mu.Unlock()
if b.done || seq < b.seq {
return
}
b.clientStats.NumCallsFinished++
if !s.bytesSent {
b.clientStats.NumCallsFinishedWithClientFailedToSend++
} else if s.bytesReceived {
b.clientStats.NumCallsFinishedKnownReceived++
}
}
}()
b.clientStats.NumCallsStarted++
if len(b.addrs) > 0 {
if b.next >= len(b.addrs) {
b.next = 0
}
next := b.next
for {
a := b.addrs[next]
next = (next + 1) % len(b.addrs)
if a.connected {
if !a.dropForRateLimiting && !a.dropForLoadBalancing {
addr = a.addr
b.next = next
b.mu.Unlock()
return
}
if !opts.BlockingWait {
b.next = next
if a.dropForLoadBalancing {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithDropForLoadBalancing++
} else if a.dropForRateLimiting {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithDropForRateLimiting++
}
b.mu.Unlock()
err = Errorf(codes.Unavailable, "%s drops requests", a.addr.Addr)
return
}
}
if next == b.next {
// Has iterated all the possible address but none is connected.
break
}
}
}
if !opts.BlockingWait {
if len(b.addrs) == 0 {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithClientFailedToSend++
b.mu.Unlock()
err = Errorf(codes.Unavailable, "there is no address available")
return
}
// Returns the next addr on b.addrs for a failfast RPC.
addr = b.addrs[b.next].addr
b.next++
b.mu.Unlock()
return
}
// Wait on b.waitCh for non-failfast RPCs.
if b.waitCh == nil {
ch = make(chan struct{})
b.waitCh = ch
} else {
ch = b.waitCh
}
b.mu.Unlock()
for {
select {
case <-ctx.Done():
b.mu.Lock()
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithClientFailedToSend++
b.mu.Unlock()
err = ctx.Err()
return
case <-ch:
b.mu.Lock()
if b.done {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithClientFailedToSend++
b.mu.Unlock()
err = ErrClientConnClosing
return
}
if len(b.addrs) > 0 {
if b.next >= len(b.addrs) {
b.next = 0
}
next := b.next
for {
a := b.addrs[next]
next = (next + 1) % len(b.addrs)
if a.connected {
if !a.dropForRateLimiting && !a.dropForLoadBalancing {
addr = a.addr
b.next = next
b.mu.Unlock()
return
}
if !opts.BlockingWait {
b.next = next
if a.dropForLoadBalancing {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithDropForLoadBalancing++
} else if a.dropForRateLimiting {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithDropForRateLimiting++
}
b.mu.Unlock()
err = Errorf(codes.Unavailable, "drop requests for the addreess %s", a.addr.Addr)
return
}
}
if next == b.next {
// Has iterated all the possible address but none is connected.
break
}
}
}
// The newly added addr got removed by Down() again.
if b.waitCh == nil {
ch = make(chan struct{})
b.waitCh = ch
} else {
ch = b.waitCh
}
b.mu.Unlock()
}
}
}
func (b *balancer) Notify() <-chan []Address {
return b.addrCh
}
func (b *balancer) Close() error {
b.mu.Lock()
defer b.mu.Unlock()
b.done = true
if b.expTimer != nil {
b.expTimer.Stop()
}
if b.waitCh != nil {
close(b.waitCh)
}
if b.addrCh != nil {
close(b.addrCh)
}
if b.w != nil {
b.w.Close()
}
return nil
}

629
vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.pb.go generated vendored Normal file
View File

@@ -0,0 +1,629 @@
// Code generated by protoc-gen-go.
// source: grpclb.proto
// DO NOT EDIT!
/*
Package grpc_lb_v1 is a generated protocol buffer package.
It is generated from these files:
grpclb.proto
It has these top-level messages:
Duration
Timestamp
LoadBalanceRequest
InitialLoadBalanceRequest
ClientStats
LoadBalanceResponse
InitialLoadBalanceResponse
ServerList
Server
*/
package grpc_lb_v1
import proto "github.com/golang/protobuf/proto"
import fmt "fmt"
import math "math"
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
type Duration struct {
// Signed seconds of the span of time. Must be from -315,576,000,000
// to +315,576,000,000 inclusive.
Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
// Signed fractions of a second at nanosecond resolution of the span
// of time. Durations less than one second are represented with a 0
// `seconds` field and a positive or negative `nanos` field. For durations
// of one second or more, a non-zero value for the `nanos` field must be
// of the same sign as the `seconds` field. Must be from -999,999,999
// to +999,999,999 inclusive.
Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
}
func (m *Duration) Reset() { *m = Duration{} }
func (m *Duration) String() string { return proto.CompactTextString(m) }
func (*Duration) ProtoMessage() {}
func (*Duration) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
func (m *Duration) GetSeconds() int64 {
if m != nil {
return m.Seconds
}
return 0
}
func (m *Duration) GetNanos() int32 {
if m != nil {
return m.Nanos
}
return 0
}
type Timestamp struct {
// Represents seconds of UTC time since Unix epoch
// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
// 9999-12-31T23:59:59Z inclusive.
Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
// Non-negative fractions of a second at nanosecond resolution. Negative
// second values with fractions must still have non-negative nanos values
// that count forward in time. Must be from 0 to 999,999,999
// inclusive.
Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
}
func (m *Timestamp) Reset() { *m = Timestamp{} }
func (m *Timestamp) String() string { return proto.CompactTextString(m) }
func (*Timestamp) ProtoMessage() {}
func (*Timestamp) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
func (m *Timestamp) GetSeconds() int64 {
if m != nil {
return m.Seconds
}
return 0
}
func (m *Timestamp) GetNanos() int32 {
if m != nil {
return m.Nanos
}
return 0
}
type LoadBalanceRequest struct {
// Types that are valid to be assigned to LoadBalanceRequestType:
// *LoadBalanceRequest_InitialRequest
// *LoadBalanceRequest_ClientStats
LoadBalanceRequestType isLoadBalanceRequest_LoadBalanceRequestType `protobuf_oneof:"load_balance_request_type"`
}
func (m *LoadBalanceRequest) Reset() { *m = LoadBalanceRequest{} }
func (m *LoadBalanceRequest) String() string { return proto.CompactTextString(m) }
func (*LoadBalanceRequest) ProtoMessage() {}
func (*LoadBalanceRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
type isLoadBalanceRequest_LoadBalanceRequestType interface {
isLoadBalanceRequest_LoadBalanceRequestType()
}
type LoadBalanceRequest_InitialRequest struct {
InitialRequest *InitialLoadBalanceRequest `protobuf:"bytes,1,opt,name=initial_request,json=initialRequest,oneof"`
}
type LoadBalanceRequest_ClientStats struct {
ClientStats *ClientStats `protobuf:"bytes,2,opt,name=client_stats,json=clientStats,oneof"`
}
func (*LoadBalanceRequest_InitialRequest) isLoadBalanceRequest_LoadBalanceRequestType() {}
func (*LoadBalanceRequest_ClientStats) isLoadBalanceRequest_LoadBalanceRequestType() {}
func (m *LoadBalanceRequest) GetLoadBalanceRequestType() isLoadBalanceRequest_LoadBalanceRequestType {
if m != nil {
return m.LoadBalanceRequestType
}
return nil
}
func (m *LoadBalanceRequest) GetInitialRequest() *InitialLoadBalanceRequest {
if x, ok := m.GetLoadBalanceRequestType().(*LoadBalanceRequest_InitialRequest); ok {
return x.InitialRequest
}
return nil
}
func (m *LoadBalanceRequest) GetClientStats() *ClientStats {
if x, ok := m.GetLoadBalanceRequestType().(*LoadBalanceRequest_ClientStats); ok {
return x.ClientStats
}
return nil
}
// XXX_OneofFuncs is for the internal use of the proto package.
func (*LoadBalanceRequest) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
return _LoadBalanceRequest_OneofMarshaler, _LoadBalanceRequest_OneofUnmarshaler, _LoadBalanceRequest_OneofSizer, []interface{}{
(*LoadBalanceRequest_InitialRequest)(nil),
(*LoadBalanceRequest_ClientStats)(nil),
}
}
func _LoadBalanceRequest_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
m := msg.(*LoadBalanceRequest)
// load_balance_request_type
switch x := m.LoadBalanceRequestType.(type) {
case *LoadBalanceRequest_InitialRequest:
b.EncodeVarint(1<<3 | proto.WireBytes)
if err := b.EncodeMessage(x.InitialRequest); err != nil {
return err
}
case *LoadBalanceRequest_ClientStats:
b.EncodeVarint(2<<3 | proto.WireBytes)
if err := b.EncodeMessage(x.ClientStats); err != nil {
return err
}
case nil:
default:
return fmt.Errorf("LoadBalanceRequest.LoadBalanceRequestType has unexpected type %T", x)
}
return nil
}
func _LoadBalanceRequest_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
m := msg.(*LoadBalanceRequest)
switch tag {
case 1: // load_balance_request_type.initial_request
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
msg := new(InitialLoadBalanceRequest)
err := b.DecodeMessage(msg)
m.LoadBalanceRequestType = &LoadBalanceRequest_InitialRequest{msg}
return true, err
case 2: // load_balance_request_type.client_stats
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
msg := new(ClientStats)
err := b.DecodeMessage(msg)
m.LoadBalanceRequestType = &LoadBalanceRequest_ClientStats{msg}
return true, err
default:
return false, nil
}
}
func _LoadBalanceRequest_OneofSizer(msg proto.Message) (n int) {
m := msg.(*LoadBalanceRequest)
// load_balance_request_type
switch x := m.LoadBalanceRequestType.(type) {
case *LoadBalanceRequest_InitialRequest:
s := proto.Size(x.InitialRequest)
n += proto.SizeVarint(1<<3 | proto.WireBytes)
n += proto.SizeVarint(uint64(s))
n += s
case *LoadBalanceRequest_ClientStats:
s := proto.Size(x.ClientStats)
n += proto.SizeVarint(2<<3 | proto.WireBytes)
n += proto.SizeVarint(uint64(s))
n += s
case nil:
default:
panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
}
return n
}
type InitialLoadBalanceRequest struct {
// Name of load balanced service (IE, balancer.service.com)
// length should be less than 256 bytes.
Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
}
func (m *InitialLoadBalanceRequest) Reset() { *m = InitialLoadBalanceRequest{} }
func (m *InitialLoadBalanceRequest) String() string { return proto.CompactTextString(m) }
func (*InitialLoadBalanceRequest) ProtoMessage() {}
func (*InitialLoadBalanceRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
func (m *InitialLoadBalanceRequest) GetName() string {
if m != nil {
return m.Name
}
return ""
}
// Contains client level statistics that are useful to load balancing. Each
// count except the timestamp should be reset to zero after reporting the stats.
type ClientStats struct {
// The timestamp of generating the report.
Timestamp *Timestamp `protobuf:"bytes,1,opt,name=timestamp" json:"timestamp,omitempty"`
// The total number of RPCs that started.
NumCallsStarted int64 `protobuf:"varint,2,opt,name=num_calls_started,json=numCallsStarted" json:"num_calls_started,omitempty"`
// The total number of RPCs that finished.
NumCallsFinished int64 `protobuf:"varint,3,opt,name=num_calls_finished,json=numCallsFinished" json:"num_calls_finished,omitempty"`
// The total number of RPCs that were dropped by the client because of rate
// limiting.
NumCallsFinishedWithDropForRateLimiting int64 `protobuf:"varint,4,opt,name=num_calls_finished_with_drop_for_rate_limiting,json=numCallsFinishedWithDropForRateLimiting" json:"num_calls_finished_with_drop_for_rate_limiting,omitempty"`
// The total number of RPCs that were dropped by the client because of load
// balancing.
NumCallsFinishedWithDropForLoadBalancing int64 `protobuf:"varint,5,opt,name=num_calls_finished_with_drop_for_load_balancing,json=numCallsFinishedWithDropForLoadBalancing" json:"num_calls_finished_with_drop_for_load_balancing,omitempty"`
// The total number of RPCs that failed to reach a server except dropped RPCs.
NumCallsFinishedWithClientFailedToSend int64 `protobuf:"varint,6,opt,name=num_calls_finished_with_client_failed_to_send,json=numCallsFinishedWithClientFailedToSend" json:"num_calls_finished_with_client_failed_to_send,omitempty"`
// The total number of RPCs that finished and are known to have been received
// by a server.
NumCallsFinishedKnownReceived int64 `protobuf:"varint,7,opt,name=num_calls_finished_known_received,json=numCallsFinishedKnownReceived" json:"num_calls_finished_known_received,omitempty"`
}
func (m *ClientStats) Reset() { *m = ClientStats{} }
func (m *ClientStats) String() string { return proto.CompactTextString(m) }
func (*ClientStats) ProtoMessage() {}
func (*ClientStats) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
func (m *ClientStats) GetTimestamp() *Timestamp {
if m != nil {
return m.Timestamp
}
return nil
}
func (m *ClientStats) GetNumCallsStarted() int64 {
if m != nil {
return m.NumCallsStarted
}
return 0
}
func (m *ClientStats) GetNumCallsFinished() int64 {
if m != nil {
return m.NumCallsFinished
}
return 0
}
func (m *ClientStats) GetNumCallsFinishedWithDropForRateLimiting() int64 {
if m != nil {
return m.NumCallsFinishedWithDropForRateLimiting
}
return 0
}
func (m *ClientStats) GetNumCallsFinishedWithDropForLoadBalancing() int64 {
if m != nil {
return m.NumCallsFinishedWithDropForLoadBalancing
}
return 0
}
func (m *ClientStats) GetNumCallsFinishedWithClientFailedToSend() int64 {
if m != nil {
return m.NumCallsFinishedWithClientFailedToSend
}
return 0
}
func (m *ClientStats) GetNumCallsFinishedKnownReceived() int64 {
if m != nil {
return m.NumCallsFinishedKnownReceived
}
return 0
}
type LoadBalanceResponse struct {
// Types that are valid to be assigned to LoadBalanceResponseType:
// *LoadBalanceResponse_InitialResponse
// *LoadBalanceResponse_ServerList
LoadBalanceResponseType isLoadBalanceResponse_LoadBalanceResponseType `protobuf_oneof:"load_balance_response_type"`
}
func (m *LoadBalanceResponse) Reset() { *m = LoadBalanceResponse{} }
func (m *LoadBalanceResponse) String() string { return proto.CompactTextString(m) }
func (*LoadBalanceResponse) ProtoMessage() {}
func (*LoadBalanceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
type isLoadBalanceResponse_LoadBalanceResponseType interface {
isLoadBalanceResponse_LoadBalanceResponseType()
}
type LoadBalanceResponse_InitialResponse struct {
InitialResponse *InitialLoadBalanceResponse `protobuf:"bytes,1,opt,name=initial_response,json=initialResponse,oneof"`
}
type LoadBalanceResponse_ServerList struct {
ServerList *ServerList `protobuf:"bytes,2,opt,name=server_list,json=serverList,oneof"`
}
func (*LoadBalanceResponse_InitialResponse) isLoadBalanceResponse_LoadBalanceResponseType() {}
func (*LoadBalanceResponse_ServerList) isLoadBalanceResponse_LoadBalanceResponseType() {}
func (m *LoadBalanceResponse) GetLoadBalanceResponseType() isLoadBalanceResponse_LoadBalanceResponseType {
if m != nil {
return m.LoadBalanceResponseType
}
return nil
}
func (m *LoadBalanceResponse) GetInitialResponse() *InitialLoadBalanceResponse {
if x, ok := m.GetLoadBalanceResponseType().(*LoadBalanceResponse_InitialResponse); ok {
return x.InitialResponse
}
return nil
}
func (m *LoadBalanceResponse) GetServerList() *ServerList {
if x, ok := m.GetLoadBalanceResponseType().(*LoadBalanceResponse_ServerList); ok {
return x.ServerList
}
return nil
}
// XXX_OneofFuncs is for the internal use of the proto package.
func (*LoadBalanceResponse) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
return _LoadBalanceResponse_OneofMarshaler, _LoadBalanceResponse_OneofUnmarshaler, _LoadBalanceResponse_OneofSizer, []interface{}{
(*LoadBalanceResponse_InitialResponse)(nil),
(*LoadBalanceResponse_ServerList)(nil),
}
}
func _LoadBalanceResponse_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
m := msg.(*LoadBalanceResponse)
// load_balance_response_type
switch x := m.LoadBalanceResponseType.(type) {
case *LoadBalanceResponse_InitialResponse:
b.EncodeVarint(1<<3 | proto.WireBytes)
if err := b.EncodeMessage(x.InitialResponse); err != nil {
return err
}
case *LoadBalanceResponse_ServerList:
b.EncodeVarint(2<<3 | proto.WireBytes)
if err := b.EncodeMessage(x.ServerList); err != nil {
return err
}
case nil:
default:
return fmt.Errorf("LoadBalanceResponse.LoadBalanceResponseType has unexpected type %T", x)
}
return nil
}
func _LoadBalanceResponse_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
m := msg.(*LoadBalanceResponse)
switch tag {
case 1: // load_balance_response_type.initial_response
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
msg := new(InitialLoadBalanceResponse)
err := b.DecodeMessage(msg)
m.LoadBalanceResponseType = &LoadBalanceResponse_InitialResponse{msg}
return true, err
case 2: // load_balance_response_type.server_list
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
msg := new(ServerList)
err := b.DecodeMessage(msg)
m.LoadBalanceResponseType = &LoadBalanceResponse_ServerList{msg}
return true, err
default:
return false, nil
}
}
func _LoadBalanceResponse_OneofSizer(msg proto.Message) (n int) {
m := msg.(*LoadBalanceResponse)
// load_balance_response_type
switch x := m.LoadBalanceResponseType.(type) {
case *LoadBalanceResponse_InitialResponse:
s := proto.Size(x.InitialResponse)
n += proto.SizeVarint(1<<3 | proto.WireBytes)
n += proto.SizeVarint(uint64(s))
n += s
case *LoadBalanceResponse_ServerList:
s := proto.Size(x.ServerList)
n += proto.SizeVarint(2<<3 | proto.WireBytes)
n += proto.SizeVarint(uint64(s))
n += s
case nil:
default:
panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
}
return n
}
type InitialLoadBalanceResponse struct {
// This is an application layer redirect that indicates the client should use
// the specified server for load balancing. When this field is non-empty in
// the response, the client should open a separate connection to the
// load_balancer_delegate and call the BalanceLoad method. Its length should
// be less than 64 bytes.
LoadBalancerDelegate string `protobuf:"bytes,1,opt,name=load_balancer_delegate,json=loadBalancerDelegate" json:"load_balancer_delegate,omitempty"`
// This interval defines how often the client should send the client stats
// to the load balancer. Stats should only be reported when the duration is
// positive.
ClientStatsReportInterval *Duration `protobuf:"bytes,2,opt,name=client_stats_report_interval,json=clientStatsReportInterval" json:"client_stats_report_interval,omitempty"`
}
func (m *InitialLoadBalanceResponse) Reset() { *m = InitialLoadBalanceResponse{} }
func (m *InitialLoadBalanceResponse) String() string { return proto.CompactTextString(m) }
func (*InitialLoadBalanceResponse) ProtoMessage() {}
func (*InitialLoadBalanceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
func (m *InitialLoadBalanceResponse) GetLoadBalancerDelegate() string {
if m != nil {
return m.LoadBalancerDelegate
}
return ""
}
func (m *InitialLoadBalanceResponse) GetClientStatsReportInterval() *Duration {
if m != nil {
return m.ClientStatsReportInterval
}
return nil
}
type ServerList struct {
// Contains a list of servers selected by the load balancer. The list will
// be updated when server resolutions change or as needed to balance load
// across more servers. The client should consume the server list in order
// unless instructed otherwise via the client_config.
Servers []*Server `protobuf:"bytes,1,rep,name=servers" json:"servers,omitempty"`
// Indicates the amount of time that the client should consider this server
// list as valid. It may be considered stale after waiting this interval of
// time after receiving the list. If the interval is not positive, the
// client can assume the list is valid until the next list is received.
ExpirationInterval *Duration `protobuf:"bytes,3,opt,name=expiration_interval,json=expirationInterval" json:"expiration_interval,omitempty"`
}
func (m *ServerList) Reset() { *m = ServerList{} }
func (m *ServerList) String() string { return proto.CompactTextString(m) }
func (*ServerList) ProtoMessage() {}
func (*ServerList) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
func (m *ServerList) GetServers() []*Server {
if m != nil {
return m.Servers
}
return nil
}
func (m *ServerList) GetExpirationInterval() *Duration {
if m != nil {
return m.ExpirationInterval
}
return nil
}
// Contains server information. When none of the [drop_for_*] fields are true,
// use the other fields. When drop_for_rate_limiting is true, ignore all other
// fields. Use drop_for_load_balancing only when it is true and
// drop_for_rate_limiting is false.
type Server struct {
// A resolved address for the server, serialized in network-byte-order. It may
// either be an IPv4 or IPv6 address.
IpAddress []byte `protobuf:"bytes,1,opt,name=ip_address,json=ipAddress,proto3" json:"ip_address,omitempty"`
// A resolved port number for the server.
Port int32 `protobuf:"varint,2,opt,name=port" json:"port,omitempty"`
// An opaque but printable token given to the frontend for each pick. All
// frontend requests for that pick must include the token in its initial
// metadata. The token is used by the backend to verify the request and to
// allow the backend to report load to the gRPC LB system.
//
// Its length is variable but less than 50 bytes.
LoadBalanceToken string `protobuf:"bytes,3,opt,name=load_balance_token,json=loadBalanceToken" json:"load_balance_token,omitempty"`
// Indicates whether this particular request should be dropped by the client
// for rate limiting.
DropForRateLimiting bool `protobuf:"varint,4,opt,name=drop_for_rate_limiting,json=dropForRateLimiting" json:"drop_for_rate_limiting,omitempty"`
// Indicates whether this particular request should be dropped by the client
// for load balancing.
DropForLoadBalancing bool `protobuf:"varint,5,opt,name=drop_for_load_balancing,json=dropForLoadBalancing" json:"drop_for_load_balancing,omitempty"`
}
func (m *Server) Reset() { *m = Server{} }
func (m *Server) String() string { return proto.CompactTextString(m) }
func (*Server) ProtoMessage() {}
func (*Server) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
func (m *Server) GetIpAddress() []byte {
if m != nil {
return m.IpAddress
}
return nil
}
func (m *Server) GetPort() int32 {
if m != nil {
return m.Port
}
return 0
}
func (m *Server) GetLoadBalanceToken() string {
if m != nil {
return m.LoadBalanceToken
}
return ""
}
func (m *Server) GetDropForRateLimiting() bool {
if m != nil {
return m.DropForRateLimiting
}
return false
}
func (m *Server) GetDropForLoadBalancing() bool {
if m != nil {
return m.DropForLoadBalancing
}
return false
}
func init() {
proto.RegisterType((*Duration)(nil), "grpc.lb.v1.Duration")
proto.RegisterType((*Timestamp)(nil), "grpc.lb.v1.Timestamp")
proto.RegisterType((*LoadBalanceRequest)(nil), "grpc.lb.v1.LoadBalanceRequest")
proto.RegisterType((*InitialLoadBalanceRequest)(nil), "grpc.lb.v1.InitialLoadBalanceRequest")
proto.RegisterType((*ClientStats)(nil), "grpc.lb.v1.ClientStats")
proto.RegisterType((*LoadBalanceResponse)(nil), "grpc.lb.v1.LoadBalanceResponse")
proto.RegisterType((*InitialLoadBalanceResponse)(nil), "grpc.lb.v1.InitialLoadBalanceResponse")
proto.RegisterType((*ServerList)(nil), "grpc.lb.v1.ServerList")
proto.RegisterType((*Server)(nil), "grpc.lb.v1.Server")
}
func init() { proto.RegisterFile("grpclb.proto", fileDescriptor0) }
var fileDescriptor0 = []byte{
// 733 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x55, 0xdd, 0x4e, 0x1b, 0x39,
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0x39, 0xf9, 0x45, 0xec, 0xbe, 0x6b, 0x5f, 0x67, 0xa1, 0x94, 0x2b, 0x86, 0xf6, 0xa1, 0x68, 0xd2,
0x0e, 0x26, 0xe7, 0xfc, 0x3b, 0x2f, 0x6c, 0xd8, 0x5e, 0x9c, 0xe1, 0xd0, 0x03, 0xf8, 0x4b, 0xf4,
0x7b, 0xa4, 0x4b, 0xa3, 0x48, 0xdb, 0x33, 0x29, 0xc3, 0x42, 0x77, 0xaa, 0x02, 0x5e, 0x12, 0xfd,
0xde, 0xa1, 0x8d, 0xb7, 0x7d, 0x18, 0xed, 0x02, 0xca, 0xb0, 0xe7, 0x5c, 0x70, 0x7d, 0xc9, 0xc2,
0x6a, 0xc1, 0x81, 0x97, 0x53, 0xf0, 0x71, 0x12, 0x47, 0x04, 0x1a, 0xa3, 0x68, 0x72, 0xcd, 0xcd,
0x25, 0x09, 0x95, 0x8c, 0xc9, 0xb9, 0x54, 0x44, 0x51, 0xc3, 0x48, 0xc4, 0x7b, 0xdc, 0x70, 0x71,
0x51, 0x9d, 0x75, 0x4c, 0xf7, 0x6f, 0x33, 0xbd, 0xe7, 0xe6, 0xf2, 0x48, 0xc9, 0xf8, 0x58, 0x2a,
0x4c, 0x0d, 0x3b, 0x4d, 0xe0, 0x88, 0xc2, 0xde, 0x9d, 0x05, 0x72, 0xed, 0xb6, 0x15, 0xe6, 0x5c,
0x85, 0xfa, 0x94, 0x0a, 0x59, 0xef, 0x6d, 0x89, 0x0f, 0xf0, 0x70, 0x52, 0x89, 0xe4, 0x19, 0x9c,
0x53, 0x1e, 0xb1, 0x90, 0x18, 0x49, 0x34, 0x13, 0x61, 0x75, 0xde, 0x15, 0xd8, 0x19, 0x57, 0xc0,
0x5f, 0xd5, 0xb1, 0xc3, 0x9f, 0xc9, 0x36, 0x13, 0x21, 0x6a, 0xc1, 0xff, 0x63, 0xe8, 0xaf, 0x84,
0xbc, 0x16, 0x44, 0xb1, 0x2e, 0xe3, 0x03, 0x16, 0x56, 0x17, 0x1c, 0xe5, 0xd6, 0x6d, 0xca, 0x37,
0x16, 0x85, 0x13, 0x50, 0xed, 0x47, 0x00, 0x2b, 0x37, 0x9e, 0x8d, 0x8e, 0xa5, 0xd0, 0x0c, 0xb5,
0x61, 0x39, 0x73, 0x80, 0x8f, 0x25, 0x4f, 0x63, 0xe7, 0x2e, 0x0b, 0x78, 0x74, 0x6b, 0x06, 0x2f,
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0x56, 0xf3, 0x7c, 0x6d, 0xb7, 0x7d, 0xca, 0x9d, 0x87, 0x40, 0x0f, 0x57, 0x07, 0x9b, 0xb0, 0x71,
0xcb, 0x01, 0x9e, 0xd3, 0x5b, 0xe0, 0x5b, 0x00, 0x1b, 0x93, 0xa5, 0xa0, 0x27, 0xb0, 0x9a, 0x4f,
0x56, 0x24, 0x64, 0x11, 0xbb, 0xa0, 0x26, 0xb5, 0x45, 0x25, 0xca, 0x92, 0xd4, 0x51, 0xb2, 0x87,
0xde, 0xc1, 0x66, 0xde, 0xb2, 0x44, 0xb1, 0x58, 0x2a, 0x43, 0xb8, 0x30, 0x4c, 0x0d, 0x68, 0x94,
0xc8, 0xaf, 0xe4, 0xe5, 0xa7, 0x43, 0x0c, 0xaf, 0xe7, 0xdc, 0x8b, 0x5d, 0xde, 0x49, 0x92, 0x56,
0xfb, 0x12, 0x00, 0x64, 0xc7, 0x44, 0xbb, 0x76, 0x62, 0xd9, 0x95, 0x9d, 0x58, 0x85, 0x7a, 0xa9,
0x89, 0x46, 0xfb, 0x81, 0x53, 0x08, 0x7a, 0x0d, 0x2b, 0xec, 0x53, 0xcc, 0x7d, 0x95, 0x4c, 0x4a,
0x61, 0x8a, 0x14, 0x94, 0x25, 0x0c, 0x35, 0xfc, 0x0c, 0x60, 0xde, 0x53, 0xa3, 0x2d, 0x00, 0x1e,
0x13, 0x1a, 0x86, 0x8a, 0x69, 0x3f, 0x34, 0xcb, 0xb8, 0xc8, 0xe3, 0x57, 0x3e, 0x60, 0xe7, 0x87,
0x55, 0x9f, 0x4c, 0x4d, 0xf7, 0x6d, 0xed, 0x7c, 0xe3, 0x2e, 0x8c, 0xbc, 0x62, 0xc2, 0x69, 0x28,
0xe2, 0xe5, 0x5c, 0x2b, 0xcf, 0x6c, 0x1c, 0xed, 0xc3, 0xea, 0x14, 0xdb, 0x2e, 0xe2, 0x95, 0x70,
0x8c, 0x45, 0x9f, 0xc2, 0xda, 0x34, 0x2b, 0x2e, 0xe2, 0x4a, 0x38, 0xc6, 0x76, 0xcd, 0x0e, 0x94,
0x73, 0xf7, 0xaf, 0x10, 0x86, 0x52, 0xf2, 0x6d, 0xc3, 0xe8, 0xdf, 0x7c, 0x83, 0x46, 0x87, 0xe5,
0xc6, 0x7f, 0x13, 0xf7, 0xfd, 0x43, 0xaa, 0x07, 0x8f, 0x82, 0xce, 0xbc, 0xfb, 0x7d, 0xed, 0xff,
0x0a, 0x00, 0x00, 0xff, 0xff, 0x64, 0xbf, 0xda, 0x5e, 0xce, 0x06, 0x00, 0x00,
}

179
vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.proto generated vendored Normal file
View File

@@ -0,0 +1,179 @@
// Copyright 2016, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
syntax = "proto3";
package grpc.lb.v1;
message Duration {
// Signed seconds of the span of time. Must be from -315,576,000,000
// to +315,576,000,000 inclusive.
int64 seconds = 1;
// Signed fractions of a second at nanosecond resolution of the span
// of time. Durations less than one second are represented with a 0
// `seconds` field and a positive or negative `nanos` field. For durations
// of one second or more, a non-zero value for the `nanos` field must be
// of the same sign as the `seconds` field. Must be from -999,999,999
// to +999,999,999 inclusive.
int32 nanos = 2;
}
message Timestamp {
// Represents seconds of UTC time since Unix epoch
// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
// 9999-12-31T23:59:59Z inclusive.
int64 seconds = 1;
// Non-negative fractions of a second at nanosecond resolution. Negative
// second values with fractions must still have non-negative nanos values
// that count forward in time. Must be from 0 to 999,999,999
// inclusive.
int32 nanos = 2;
}
service LoadBalancer {
// Bidirectional rpc to get a list of servers.
rpc BalanceLoad(stream LoadBalanceRequest)
returns (stream LoadBalanceResponse);
}
message LoadBalanceRequest {
oneof load_balance_request_type {
// This message should be sent on the first request to the load balancer.
InitialLoadBalanceRequest initial_request = 1;
// The client stats should be periodically reported to the load balancer
// based on the duration defined in the InitialLoadBalanceResponse.
ClientStats client_stats = 2;
}
}
message InitialLoadBalanceRequest {
// Name of load balanced service (IE, balancer.service.com)
// length should be less than 256 bytes.
string name = 1;
}
// Contains client level statistics that are useful to load balancing. Each
// count except the timestamp should be reset to zero after reporting the stats.
message ClientStats {
// The timestamp of generating the report.
Timestamp timestamp = 1;
// The total number of RPCs that started.
int64 num_calls_started = 2;
// The total number of RPCs that finished.
int64 num_calls_finished = 3;
// The total number of RPCs that were dropped by the client because of rate
// limiting.
int64 num_calls_finished_with_drop_for_rate_limiting = 4;
// The total number of RPCs that were dropped by the client because of load
// balancing.
int64 num_calls_finished_with_drop_for_load_balancing = 5;
// The total number of RPCs that failed to reach a server except dropped RPCs.
int64 num_calls_finished_with_client_failed_to_send = 6;
// The total number of RPCs that finished and are known to have been received
// by a server.
int64 num_calls_finished_known_received = 7;
}
message LoadBalanceResponse {
oneof load_balance_response_type {
// This message should be sent on the first response to the client.
InitialLoadBalanceResponse initial_response = 1;
// Contains the list of servers selected by the load balancer. The client
// should send requests to these servers in the specified order.
ServerList server_list = 2;
}
}
message InitialLoadBalanceResponse {
// This is an application layer redirect that indicates the client should use
// the specified server for load balancing. When this field is non-empty in
// the response, the client should open a separate connection to the
// load_balancer_delegate and call the BalanceLoad method. Its length should
// be less than 64 bytes.
string load_balancer_delegate = 1;
// This interval defines how often the client should send the client stats
// to the load balancer. Stats should only be reported when the duration is
// positive.
Duration client_stats_report_interval = 2;
}
message ServerList {
// Contains a list of servers selected by the load balancer. The list will
// be updated when server resolutions change or as needed to balance load
// across more servers. The client should consume the server list in order
// unless instructed otherwise via the client_config.
repeated Server servers = 1;
// Indicates the amount of time that the client should consider this server
// list as valid. It may be considered stale after waiting this interval of
// time after receiving the list. If the interval is not positive, the
// client can assume the list is valid until the next list is received.
Duration expiration_interval = 3;
}
// Contains server information. When none of the [drop_for_*] fields are true,
// use the other fields. When drop_for_rate_limiting is true, ignore all other
// fields. Use drop_for_load_balancing only when it is true and
// drop_for_rate_limiting is false.
message Server {
// A resolved address for the server, serialized in network-byte-order. It may
// either be an IPv4 or IPv6 address.
bytes ip_address = 1;
// A resolved port number for the server.
int32 port = 2;
// An opaque but printable token given to the frontend for each pick. All
// frontend requests for that pick must include the token in its initial
// metadata. The token is used by the backend to verify the request and to
// allow the backend to report load to the gRPC LB system.
//
// Its length is variable but less than 50 bytes.
string load_balance_token = 3;
// Indicates whether this particular request should be dropped by the client
// for rate limiting.
bool drop_for_rate_limiting = 4;
// Indicates whether this particular request should be dropped by the client
// for load balancing.
bool drop_for_load_balancing = 5;
}

2
vendor/google.golang.org/grpc/interceptor.go generated vendored
View File

@@ -40,7 +40,7 @@ import (
// UnaryInvoker is called by UnaryClientInterceptor to complete RPCs.
type UnaryInvoker func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error
// UnaryClientInterceptor intercepts the execution of a unary RPC on the client. inovker is the handler to complete the RPC
// UnaryClientInterceptor intercepts the execution of a unary RPC on the client. invoker is the handler to complete the RPC
// and it is the responsibility of the interceptor to call it.
// This is the EXPERIMENTAL API.
type UnaryClientInterceptor func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, invoker UnaryInvoker, opts ...CallOption) error

80
vendor/google.golang.org/grpc/keepalive/keepalive.go generated vendored Normal file
View File

@@ -0,0 +1,80 @@
/*
*
* Copyright 2017, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
// Package keepalive defines configurable parameters for point-to-point healthcheck.
package keepalive
import (
"time"
)
// ClientParameters is used to set keepalive parameters on the client-side.
// These configure how the client will actively probe to notice when a connection broken
// and to cause activity so intermediaries are aware the connection is still in use.
// Make sure these parameters are set in coordination with the keepalive policy on the server,
// as incompatible settings can result in closing of connection.
type ClientParameters struct {
// After a duration of this time if the client doesn't see any activity it pings the server to see if the transport is still alive.
Time time.Duration // The current default value is infinity.
// After having pinged for keepalive check, the client waits for a duration of Timeout and if no activity is seen even after that
// the connection is closed.
Timeout time.Duration // The current default value is 20 seconds.
// If true, client runs keepalive checks even with no active RPCs.
PermitWithoutStream bool // false by default.
}
// ServerParameters is used to set keepalive and max-age parameters on the server-side.
type ServerParameters struct {
// MaxConnectionIdle is a duration for the amount of time after which an idle connection would be closed by sending a GoAway.
// Idleness duration is defined since the most recent time the number of outstanding RPCs became zero or the connection establishment.
MaxConnectionIdle time.Duration // The current default value is infinity.
// MaxConnectionAge is a duration for the maximum amount of time a connection may exist before it will be closed by sending a GoAway.
// A random jitter of +/-10% will be added to MaxConnectionAge to spread out connection storms.
MaxConnectionAge time.Duration // The current default value is infinity.
// MaxConnectinoAgeGrace is an additive period after MaxConnectionAge after which the connection will be forcibly closed.
MaxConnectionAgeGrace time.Duration // The current default value is infinity.
// After a duration of this time if the server doesn't see any activity it pings the client to see if the transport is still alive.
Time time.Duration // The current default value is 2 hours.
// After having pinged for keepalive check, the server waits for a duration of Timeout and if no activity is seen even after that
// the connection is closed.
Timeout time.Duration // The current default value is 20 seconds.
}
// EnforcementPolicy is used to set keepalive enforcement policy on the server-side.
// Server will close connection with a client that violates this policy.
type EnforcementPolicy struct {
// MinTime is the minimum amount of time a client should wait before sending a keepalive ping.
MinTime time.Duration // The current default value is 5 minutes.
// If true, server expects keepalive pings even when there are no active streams(RPCs).
PermitWithoutStream bool // false by default.
}

87
vendor/google.golang.org/grpc/metadata/metadata.go generated vendored
View File

@@ -32,49 +32,19 @@
*/
// Package metadata define the structure of the metadata supported by gRPC library.
// Please refer to http://www.grpc.io/docs/guides/wire.html for more information about custom-metadata.
package metadata // import "google.golang.org/grpc/metadata"
import (
"encoding/base64"
"fmt"
"strings"
"golang.org/x/net/context"
)
const (
binHdrSuffix = "-bin"
)
// encodeKeyValue encodes key and value qualified for transmission via gRPC.
// Transmitting binary headers violates HTTP/2 spec.
// TODO(zhaoq): Maybe check if k is ASCII also.
func encodeKeyValue(k, v string) (string, string) {
k = strings.ToLower(k)
if strings.HasSuffix(k, binHdrSuffix) {
val := base64.StdEncoding.EncodeToString([]byte(v))
v = string(val)
}
return k, v
}
// DecodeKeyValue returns the original key and value corresponding to the
// encoded data in k, v.
// If k is a binary header and v contains comma, v is split on comma before decoded,
// and the decoded v will be joined with comma before returned.
// DecodeKeyValue returns k, v, nil. It is deprecated and should not be used.
func DecodeKeyValue(k, v string) (string, string, error) {
if !strings.HasSuffix(k, binHdrSuffix) {
return k, v, nil
}
vvs := strings.Split(v, ",")
for i, vv := range vvs {
val, err := base64.StdEncoding.DecodeString(vv)
if err != nil {
return "", "", err
}
vvs[i] = string(val)
}
return k, strings.Join(vvs, ","), nil
return k, v, nil
}
// MD is a mapping from metadata keys to values. Users should use the following
@@ -82,10 +52,11 @@ func DecodeKeyValue(k, v string) (string, string, error) {
type MD map[string][]string
// New creates a MD from given key-value map.
// Keys are automatically converted to lowercase.
func New(m map[string]string) MD {
md := MD{}
for k, v := range m {
key, val := encodeKeyValue(k, v)
for k, val := range m {
key := strings.ToLower(k)
md[key] = append(md[key], val)
}
return md
@@ -93,19 +64,19 @@ func New(m map[string]string) MD {
// Pairs returns an MD formed by the mapping of key, value ...
// Pairs panics if len(kv) is odd.
// Keys are automatically converted to lowercase.
func Pairs(kv ...string) MD {
if len(kv)%2 == 1 {
panic(fmt.Sprintf("metadata: Pairs got the odd number of input pairs for metadata: %d", len(kv)))
}
md := MD{}
var k string
var key string
for i, s := range kv {
if i%2 == 0 {
k = s
key = strings.ToLower(s)
continue
}
key, val := encodeKeyValue(k, s)
md[key] = append(md[key], val)
md[key] = append(md[key], s)
}
return md
}
@@ -133,17 +104,41 @@ func Join(mds ...MD) MD {
return out
}
type mdKey struct{}
type mdIncomingKey struct{}
type mdOutgoingKey struct{}
// NewContext creates a new context with md attached.
// NewContext is a wrapper for NewOutgoingContext(ctx, md). Deprecated.
func NewContext(ctx context.Context, md MD) context.Context {
return context.WithValue(ctx, mdKey{}, md)
return NewOutgoingContext(ctx, md)
}
// FromContext returns the MD in ctx if it exists.
// The returned md should be immutable, writing to it may cause races.
// Modification should be made to the copies of the returned md.
// NewIncomingContext creates a new context with incoming md attached.
func NewIncomingContext(ctx context.Context, md MD) context.Context {
return context.WithValue(ctx, mdIncomingKey{}, md)
}
// NewOutgoingContext creates a new context with outgoing md attached.
func NewOutgoingContext(ctx context.Context, md MD) context.Context {
return context.WithValue(ctx, mdOutgoingKey{}, md)
}
// FromContext is a wrapper for FromIncomingContext(ctx). Deprecated.
func FromContext(ctx context.Context) (md MD, ok bool) {
md, ok = ctx.Value(mdKey{}).(MD)
return FromIncomingContext(ctx)
}
// FromIncomingContext returns the incoming MD in ctx if it exists. The
// returned md should be immutable, writing to it may cause races.
// Modification should be made to the copies of the returned md.
func FromIncomingContext(ctx context.Context) (md MD, ok bool) {
md, ok = ctx.Value(mdIncomingKey{}).(MD)
return
}
// FromOutgoingContext returns the outgoing MD in ctx if it exists. The
// returned md should be immutable, writing to it may cause races.
// Modification should be made to the copies of the returned md.
func FromOutgoingContext(ctx context.Context) (md MD, ok bool) {
md, ok = ctx.Value(mdOutgoingKey{}).(MD)
return
}

145
vendor/google.golang.org/grpc/proxy.go generated vendored Normal file
View File

@@ -0,0 +1,145 @@
/*
*
* Copyright 2017, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package grpc
import (
"bufio"
"errors"
"fmt"
"io"
"net"
"net/http"
"net/http/httputil"
"net/url"
"golang.org/x/net/context"
)
var (
// errDisabled indicates that proxy is disabled for the address.
errDisabled = errors.New("proxy is disabled for the address")
// The following variable will be overwritten in the tests.
httpProxyFromEnvironment = http.ProxyFromEnvironment
)
func mapAddress(ctx context.Context, address string) (string, error) {
req := &http.Request{
URL: &url.URL{
Scheme: "https",
Host: address,
},
}
url, err := httpProxyFromEnvironment(req)
if err != nil {
return "", err
}
if url == nil {
return "", errDisabled
}
return url.Host, nil
}
// To read a response from a net.Conn, http.ReadResponse() takes a bufio.Reader.
// It's possible that this reader reads more than what's need for the response and stores
// those bytes in the buffer.
// bufConn wraps the original net.Conn and the bufio.Reader to make sure we don't lose the
// bytes in the buffer.
type bufConn struct {
net.Conn
r io.Reader
}
func (c *bufConn) Read(b []byte) (int, error) {
return c.r.Read(b)
}
func doHTTPConnectHandshake(ctx context.Context, conn net.Conn, addr string) (_ net.Conn, err error) {
defer func() {
if err != nil {
conn.Close()
}
}()
req := (&http.Request{
Method: http.MethodConnect,
URL: &url.URL{Host: addr},
Header: map[string][]string{"User-Agent": {grpcUA}},
})
if err := sendHTTPRequest(ctx, req, conn); err != nil {
return nil, fmt.Errorf("failed to write the HTTP request: %v", err)
}
r := bufio.NewReader(conn)
resp, err := http.ReadResponse(r, req)
if err != nil {
return nil, fmt.Errorf("reading server HTTP response: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
dump, err := httputil.DumpResponse(resp, true)
if err != nil {
return nil, fmt.Errorf("failed to do connect handshake, status code: %s", resp.Status)
}
return nil, fmt.Errorf("failed to do connect handshake, response: %q", dump)
}
return &bufConn{Conn: conn, r: r}, nil
}
// newProxyDialer returns a dialer that connects to proxy first if necessary.
// The returned dialer checks if a proxy is necessary, dial to the proxy with the
// provided dialer, does HTTP CONNECT handshake and returns the connection.
func newProxyDialer(dialer func(context.Context, string) (net.Conn, error)) func(context.Context, string) (net.Conn, error) {
return func(ctx context.Context, addr string) (conn net.Conn, err error) {
var skipHandshake bool
newAddr, err := mapAddress(ctx, addr)
if err != nil {
if err != errDisabled {
return nil, err
}
skipHandshake = true
newAddr = addr
}
conn, err = dialer(ctx, newAddr)
if err != nil {
return
}
if !skipHandshake {
conn, err = doHTTPConnectHandshake(ctx, conn, addr)
}
return
}
}

174
vendor/google.golang.org/grpc/rpc_util.go generated vendored
View File

@@ -37,47 +37,21 @@ import (
"bytes"
"compress/gzip"
"encoding/binary"
"fmt"
"io"
"io/ioutil"
"math"
"os"
"time"
"github.com/golang/protobuf/proto"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
// Codec defines the interface gRPC uses to encode and decode messages.
type Codec interface {
// Marshal returns the wire format of v.
Marshal(v interface{}) ([]byte, error)
// Unmarshal parses the wire format into v.
Unmarshal(data []byte, v interface{}) error
// String returns the name of the Codec implementation. The returned
// string will be used as part of content type in transmission.
String() string
}
// protoCodec is a Codec implementation with protobuf. It is the default codec for gRPC.
type protoCodec struct{}
func (protoCodec) Marshal(v interface{}) ([]byte, error) {
return proto.Marshal(v.(proto.Message))
}
func (protoCodec) Unmarshal(data []byte, v interface{}) error {
return proto.Unmarshal(data, v.(proto.Message))
}
func (protoCodec) String() string {
return "proto"
}
// Compressor defines the interface gRPC uses to compress a message.
type Compressor interface {
// Do compresses p into w.
@@ -140,6 +114,7 @@ type callInfo struct {
failFast bool
headerMD metadata.MD
trailerMD metadata.MD
peer *peer.Peer
traceInfo traceInfo // in trace.go
}
@@ -183,12 +158,22 @@ func Trailer(md *metadata.MD) CallOption {
})
}
// Peer returns a CallOption that retrieves peer information for a
// unary RPC.
func Peer(peer *peer.Peer) CallOption {
return afterCall(func(c *callInfo) {
if c.peer != nil {
*peer = *c.peer
}
})
}
// FailFast configures the action to take when an RPC is attempted on broken
// connections or unreachable servers. If failfast is true, the RPC will fail
// immediately. Otherwise, the RPC client will block the call until a
// connection is available (or the call is canceled or times out) and will retry
// the call if it fails due to a transient error. Please refer to
// https://github.com/grpc/grpc/blob/master/doc/fail_fast.md
// https://github.com/grpc/grpc/blob/master/doc/fail_fast.md. Note: failFast is default to true.
func FailFast(failFast bool) CallOption {
return beforeCall(func(c *callInfo) error {
c.failFast = failFast
@@ -360,88 +345,80 @@ func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{
return nil
}
// rpcError defines the status from an RPC.
type rpcError struct {
code codes.Code
desc string
type rpcInfo struct {
bytesSent bool
bytesReceived bool
}
func (e *rpcError) Error() string {
return fmt.Sprintf("rpc error: code = %d desc = %s", e.code, e.desc)
type rpcInfoContextKey struct{}
func newContextWithRPCInfo(ctx context.Context) context.Context {
return context.WithValue(ctx, rpcInfoContextKey{}, &rpcInfo{})
}
func rpcInfoFromContext(ctx context.Context) (s *rpcInfo, ok bool) {
s, ok = ctx.Value(rpcInfoContextKey{}).(*rpcInfo)
return
}
func updateRPCInfoInContext(ctx context.Context, s rpcInfo) {
if ss, ok := rpcInfoFromContext(ctx); ok {
*ss = s
}
return
}
// Code returns the error code for err if it was produced by the rpc system.
// Otherwise, it returns codes.Unknown.
//
// Deprecated; use status.FromError and Code method instead.
func Code(err error) codes.Code {
if err == nil {
return codes.OK
}
if e, ok := err.(*rpcError); ok {
return e.code
if s, ok := status.FromError(err); ok {
return s.Code()
}
return codes.Unknown
}
// ErrorDesc returns the error description of err if it was produced by the rpc system.
// Otherwise, it returns err.Error() or empty string when err is nil.
//
// Deprecated; use status.FromError and Message method instead.
func ErrorDesc(err error) string {
if err == nil {
return ""
}
if e, ok := err.(*rpcError); ok {
return e.desc
if s, ok := status.FromError(err); ok {
return s.Message()
}
return err.Error()
}
// Errorf returns an error containing an error code and a description;
// Errorf returns nil if c is OK.
//
// Deprecated; use status.Errorf instead.
func Errorf(c codes.Code, format string, a ...interface{}) error {
if c == codes.OK {
return nil
}
return &rpcError{
code: c,
desc: fmt.Sprintf(format, a...),
}
return status.Errorf(c, format, a...)
}
// toRPCErr converts an error into a rpcError.
// toRPCErr converts an error into an error from the status package.
func toRPCErr(err error) error {
switch e := err.(type) {
case *rpcError:
if _, ok := status.FromError(err); ok {
return err
}
switch e := err.(type) {
case transport.StreamError:
return &rpcError{
code: e.Code,
desc: e.Desc,
}
return status.Error(e.Code, e.Desc)
case transport.ConnectionError:
return &rpcError{
code: codes.Internal,
desc: e.Desc,
}
return status.Error(codes.Internal, e.Desc)
default:
switch err {
case context.DeadlineExceeded:
return &rpcError{
code: codes.DeadlineExceeded,
desc: err.Error(),
}
return status.Error(codes.DeadlineExceeded, err.Error())
case context.Canceled:
return &rpcError{
code: codes.Canceled,
desc: err.Error(),
}
return status.Error(codes.Canceled, err.Error())
case ErrClientConnClosing:
return &rpcError{
code: codes.FailedPrecondition,
desc: err.Error(),
}
return status.Error(codes.FailedPrecondition, err.Error())
}
}
return Errorf(codes.Unknown, "%v", err)
return status.Error(codes.Unknown, err.Error())
}
// convertCode converts a standard Go error into its canonical code. Note that
@@ -472,6 +449,44 @@ func convertCode(err error) codes.Code {
return codes.Unknown
}
// MethodConfig defines the configuration recommended by the service providers for a
// particular method.
// This is EXPERIMENTAL and subject to change.
type MethodConfig struct {
// WaitForReady indicates whether RPCs sent to this method should wait until
// the connection is ready by default (!failfast). The value specified via the
// gRPC client API will override the value set here.
WaitForReady bool
// Timeout is the default timeout for RPCs sent to this method. The actual
// deadline used will be the minimum of the value specified here and the value
// set by the application via the gRPC client API. If either one is not set,
// then the other will be used. If neither is set, then the RPC has no deadline.
Timeout time.Duration
// MaxReqSize is the maximum allowed payload size for an individual request in a
// stream (client->server) in bytes. The size which is measured is the serialized
// payload after per-message compression (but before stream compression) in bytes.
// The actual value used is the minumum of the value specified here and the value set
// by the application via the gRPC client API. If either one is not set, then the other
// will be used. If neither is set, then the built-in default is used.
// TODO: support this.
MaxReqSize uint32
// MaxRespSize is the maximum allowed payload size for an individual response in a
// stream (server->client) in bytes.
// TODO: support this.
MaxRespSize uint32
}
// ServiceConfig is provided by the service provider and contains parameters for how
// clients that connect to the service should behave.
// This is EXPERIMENTAL and subject to change.
type ServiceConfig struct {
// LB is the load balancer the service providers recommends. The balancer specified
// via grpc.WithBalancer will override this.
LB Balancer
// Methods contains a map for the methods in this service.
Methods map[string]MethodConfig
}
// SupportPackageIsVersion4 is referenced from generated protocol buffer files
// to assert that that code is compatible with this version of the grpc package.
//
@@ -479,3 +494,8 @@ func convertCode(err error) codes.Code {
// requires a synchronised update of grpc-go and protoc-gen-go. This constant
// should not be referenced from any other code.
const SupportPackageIsVersion4 = true
// Version is the current grpc version.
const Version = "1.3.0"
const grpcUA = "grpc-go/" + Version

267
vendor/google.golang.org/grpc/server.go generated vendored
View File

@@ -53,8 +53,10 @@ import (
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/internal"
"google.golang.org/grpc/keepalive"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
"google.golang.org/grpc/tap"
"google.golang.org/grpc/transport"
)
@@ -113,8 +115,12 @@ type options struct {
unaryInt UnaryServerInterceptor
streamInt StreamServerInterceptor
inTapHandle tap.ServerInHandle
statsHandler stats.Handler
maxConcurrentStreams uint32
useHandlerImpl bool // use http.Handler-based server
unknownStreamDesc *StreamDesc
keepaliveParams keepalive.ServerParameters
keepalivePolicy keepalive.EnforcementPolicy
}
var defaultMaxMsgSize = 1024 * 1024 * 4 // use 4MB as the default message size limit
@@ -122,6 +128,20 @@ var defaultMaxMsgSize = 1024 * 1024 * 4 // use 4MB as the default message size l
// A ServerOption sets options.
type ServerOption func(*options)
// KeepaliveParams returns a ServerOption that sets keepalive and max-age parameters for the server.
func KeepaliveParams(kp keepalive.ServerParameters) ServerOption {
return func(o *options) {
o.keepaliveParams = kp
}
}
// KeepaliveEnforcementPolicy returns a ServerOption that sets keepalive enforcement policy for the server.
func KeepaliveEnforcementPolicy(kep keepalive.EnforcementPolicy) ServerOption {
return func(o *options) {
o.keepalivePolicy = kep
}
}
// CustomCodec returns a ServerOption that sets a codec for message marshaling and unmarshaling.
func CustomCodec(codec Codec) ServerOption {
return func(o *options) {
@@ -200,6 +220,31 @@ func InTapHandle(h tap.ServerInHandle) ServerOption {
}
}
// StatsHandler returns a ServerOption that sets the stats handler for the server.
func StatsHandler(h stats.Handler) ServerOption {
return func(o *options) {
o.statsHandler = h
}
}
// UnknownServiceHandler returns a ServerOption that allows for adding a custom
// unknown service handler. The provided method is a bidi-streaming RPC service
// handler that will be invoked instead of returning the the "unimplemented" gRPC
// error whenever a request is received for an unregistered service or method.
// The handling function has full access to the Context of the request and the
// stream, and the invocation passes through interceptors.
func UnknownServiceHandler(streamHandler StreamHandler) ServerOption {
return func(o *options) {
o.unknownStreamDesc = &StreamDesc{
StreamName: "unknown_service_handler",
Handler: streamHandler,
// We need to assume that the users of the streamHandler will want to use both.
ClientStreams: true,
ServerStreams: true,
}
}
}
// NewServer creates a gRPC server which has no service registered and has not
// started to accept requests yet.
func NewServer(opt ...ServerOption) *Server {
@@ -343,6 +388,7 @@ func (s *Server) useTransportAuthenticator(rawConn net.Conn) (net.Conn, credenti
// read gRPC requests and then call the registered handlers to reply to them.
// Serve returns when lis.Accept fails with fatal errors. lis will be closed when
// this method returns.
// Serve always returns non-nil error.
func (s *Server) Serve(lis net.Listener) error {
s.mu.Lock()
s.printf("serving")
@@ -437,9 +483,12 @@ func (s *Server) handleRawConn(rawConn net.Conn) {
// transport.NewServerTransport).
func (s *Server) serveHTTP2Transport(c net.Conn, authInfo credentials.AuthInfo) {
config := &transport.ServerConfig{
MaxStreams: s.opts.maxConcurrentStreams,
AuthInfo: authInfo,
InTapHandle: s.opts.inTapHandle,
MaxStreams: s.opts.maxConcurrentStreams,
AuthInfo: authInfo,
InTapHandle: s.opts.inTapHandle,
StatsHandler: s.opts.statsHandler,
KeepaliveParams: s.opts.keepaliveParams,
KeepalivePolicy: s.opts.keepalivePolicy,
}
st, err := transport.NewServerTransport("http2", c, config)
if err != nil {
@@ -566,7 +615,7 @@ func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Str
if cp != nil {
cbuf = new(bytes.Buffer)
}
if stats.On() {
if s.opts.statsHandler != nil {
outPayload = &stats.OutPayload{}
}
p, err := encode(s.opts.codec, msg, cp, cbuf, outPayload)
@@ -583,27 +632,28 @@ func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Str
err = t.Write(stream, p, opts)
if err == nil && outPayload != nil {
outPayload.SentTime = time.Now()
stats.HandleRPC(stream.Context(), outPayload)
s.opts.statsHandler.HandleRPC(stream.Context(), outPayload)
}
return err
}
func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, md *MethodDesc, trInfo *traceInfo) (err error) {
if stats.On() {
sh := s.opts.statsHandler
if sh != nil {
begin := &stats.Begin{
BeginTime: time.Now(),
}
stats.HandleRPC(stream.Context(), begin)
sh.HandleRPC(stream.Context(), begin)
}
defer func() {
if stats.On() {
if sh != nil {
end := &stats.End{
EndTime: time.Now(),
}
if err != nil && err != io.EOF {
end.Error = toRPCErr(err)
}
stats.HandleRPC(stream.Context(), end)
sh.HandleRPC(stream.Context(), end)
}
}()
if trInfo != nil {
@@ -622,7 +672,7 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
stream.SetSendCompress(s.opts.cp.Type())
}
p := &parser{r: stream}
for {
for { // TODO: delete
pf, req, err := p.recvMsg(s.opts.maxMsgSize)
if err == io.EOF {
// The entire stream is done (for unary RPC only).
@@ -632,45 +682,44 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error())
}
if err != nil {
switch err := err.(type) {
case *rpcError:
if e := t.WriteStatus(stream, err.code, err.desc); e != nil {
if st, ok := status.FromError(err); ok {
if e := t.WriteStatus(stream, st); e != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
}
case transport.ConnectionError:
// Nothing to do here.
case transport.StreamError:
if e := t.WriteStatus(stream, err.Code, err.Desc); e != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
} else {
switch st := err.(type) {
case transport.ConnectionError:
// Nothing to do here.
case transport.StreamError:
if e := t.WriteStatus(stream, status.New(st.Code, st.Desc)); e != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
}
default:
panic(fmt.Sprintf("grpc: Unexpected error (%T) from recvMsg: %v", st, st))
}
default:
panic(fmt.Sprintf("grpc: Unexpected error (%T) from recvMsg: %v", err, err))
}
return err
}
if err := checkRecvPayload(pf, stream.RecvCompress(), s.opts.dc); err != nil {
switch err := err.(type) {
case *rpcError:
if e := t.WriteStatus(stream, err.code, err.desc); e != nil {
if st, ok := status.FromError(err); ok {
if e := t.WriteStatus(stream, st); e != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
}
return err
default:
if e := t.WriteStatus(stream, codes.Internal, err.Error()); e != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
}
// TODO checkRecvPayload always return RPC error. Add a return here if necessary.
}
if e := t.WriteStatus(stream, status.New(codes.Internal, err.Error())); e != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
}
// TODO checkRecvPayload always return RPC error. Add a return here if necessary.
}
var inPayload *stats.InPayload
if stats.On() {
if sh != nil {
inPayload = &stats.InPayload{
RecvTime: time.Now(),
}
}
statusCode := codes.OK
statusDesc := ""
df := func(v interface{}) error {
if inPayload != nil {
inPayload.WireLength = len(req)
@@ -679,26 +728,22 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
var err error
req, err = s.opts.dc.Do(bytes.NewReader(req))
if err != nil {
if err := t.WriteStatus(stream, codes.Internal, err.Error()); err != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err)
}
return Errorf(codes.Internal, err.Error())
}
}
if len(req) > s.opts.maxMsgSize {
// TODO: Revisit the error code. Currently keep it consistent with
// java implementation.
statusCode = codes.Internal
statusDesc = fmt.Sprintf("grpc: server received a message of %d bytes exceeding %d limit", len(req), s.opts.maxMsgSize)
return status.Errorf(codes.Internal, "grpc: server received a message of %d bytes exceeding %d limit", len(req), s.opts.maxMsgSize)
}
if err := s.opts.codec.Unmarshal(req, v); err != nil {
return err
return status.Errorf(codes.Internal, "grpc: error unmarshalling request: %v", err)
}
if inPayload != nil {
inPayload.Payload = v
inPayload.Data = req
inPayload.Length = len(req)
stats.HandleRPC(stream.Context(), inPayload)
sh.HandleRPC(stream.Context(), inPayload)
}
if trInfo != nil {
trInfo.tr.LazyLog(&payload{sent: false, msg: v}, true)
@@ -707,21 +752,20 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
}
reply, appErr := md.Handler(srv.server, stream.Context(), df, s.opts.unaryInt)
if appErr != nil {
if err, ok := appErr.(*rpcError); ok {
statusCode = err.code
statusDesc = err.desc
} else {
statusCode = convertCode(appErr)
statusDesc = appErr.Error()
appStatus, ok := status.FromError(appErr)
if !ok {
// Convert appErr if it is not a grpc status error.
appErr = status.Error(convertCode(appErr), appErr.Error())
appStatus, _ = status.FromError(appErr)
}
if trInfo != nil && statusCode != codes.OK {
trInfo.tr.LazyLog(stringer(statusDesc), true)
if trInfo != nil {
trInfo.tr.LazyLog(stringer(appStatus.Message()), true)
trInfo.tr.SetError()
}
if err := t.WriteStatus(stream, statusCode, statusDesc); err != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status: %v", err)
if e := t.WriteStatus(stream, appStatus); e != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status: %v", e)
}
return Errorf(statusCode, statusDesc)
return appErr
}
if trInfo != nil {
trInfo.tr.LazyLog(stringer("OK"), false)
@@ -731,59 +775,70 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
Delay: false,
}
if err := s.sendResponse(t, stream, reply, s.opts.cp, opts); err != nil {
switch err := err.(type) {
case transport.ConnectionError:
// Nothing to do here.
case transport.StreamError:
statusCode = err.Code
statusDesc = err.Desc
default:
statusCode = codes.Unknown
statusDesc = err.Error()
if err == io.EOF {
// The entire stream is done (for unary RPC only).
return err
}
if s, ok := status.FromError(err); ok {
if e := t.WriteStatus(stream, s); e != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status: %v", e)
}
} else {
switch st := err.(type) {
case transport.ConnectionError:
// Nothing to do here.
case transport.StreamError:
if e := t.WriteStatus(stream, status.New(st.Code, st.Desc)); e != nil {
grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
}
default:
panic(fmt.Sprintf("grpc: Unexpected error (%T) from sendResponse: %v", st, st))
}
}
return err
}
if trInfo != nil {
trInfo.tr.LazyLog(&payload{sent: true, msg: reply}, true)
}
errWrite := t.WriteStatus(stream, statusCode, statusDesc)
if statusCode != codes.OK {
return Errorf(statusCode, statusDesc)
}
return errWrite
// TODO: Should we be logging if writing status failed here, like above?
// Should the logging be in WriteStatus? Should we ignore the WriteStatus
// error or allow the stats handler to see it?
return t.WriteStatus(stream, status.New(codes.OK, ""))
}
}
func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, sd *StreamDesc, trInfo *traceInfo) (err error) {
if stats.On() {
sh := s.opts.statsHandler
if sh != nil {
begin := &stats.Begin{
BeginTime: time.Now(),
}
stats.HandleRPC(stream.Context(), begin)
sh.HandleRPC(stream.Context(), begin)
}
defer func() {
if stats.On() {
if sh != nil {
end := &stats.End{
EndTime: time.Now(),
}
if err != nil && err != io.EOF {
end.Error = toRPCErr(err)
}
stats.HandleRPC(stream.Context(), end)
sh.HandleRPC(stream.Context(), end)
}
}()
if s.opts.cp != nil {
stream.SetSendCompress(s.opts.cp.Type())
}
ss := &serverStream{
t: t,
s: stream,
p: &parser{r: stream},
codec: s.opts.codec,
cp: s.opts.cp,
dc: s.opts.dc,
maxMsgSize: s.opts.maxMsgSize,
trInfo: trInfo,
t: t,
s: stream,
p: &parser{r: stream},
codec: s.opts.codec,
cp: s.opts.cp,
dc: s.opts.dc,
maxMsgSize: s.opts.maxMsgSize,
trInfo: trInfo,
statsHandler: sh,
}
if ss.cp != nil {
ss.cbuf = new(bytes.Buffer)
@@ -802,43 +857,47 @@ func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transp
}()
}
var appErr error
var server interface{}
if srv != nil {
server = srv.server
}
if s.opts.streamInt == nil {
appErr = sd.Handler(srv.server, ss)
appErr = sd.Handler(server, ss)
} else {
info := &StreamServerInfo{
FullMethod: stream.Method(),
IsClientStream: sd.ClientStreams,
IsServerStream: sd.ServerStreams,
}
appErr = s.opts.streamInt(srv.server, ss, info, sd.Handler)
appErr = s.opts.streamInt(server, ss, info, sd.Handler)
}
if appErr != nil {
if err, ok := appErr.(*rpcError); ok {
ss.statusCode = err.code
ss.statusDesc = err.desc
} else if err, ok := appErr.(transport.StreamError); ok {
ss.statusCode = err.Code
ss.statusDesc = err.Desc
} else {
ss.statusCode = convertCode(appErr)
ss.statusDesc = appErr.Error()
appStatus, ok := status.FromError(appErr)
if !ok {
switch err := appErr.(type) {
case transport.StreamError:
appStatus = status.New(err.Code, err.Desc)
default:
appStatus = status.New(convertCode(appErr), appErr.Error())
}
appErr = appStatus.Err()
}
if trInfo != nil {
ss.mu.Lock()
ss.trInfo.tr.LazyLog(stringer(appStatus.Message()), true)
ss.trInfo.tr.SetError()
ss.mu.Unlock()
}
t.WriteStatus(ss.s, appStatus)
// TODO: Should we log an error from WriteStatus here and below?
return appErr
}
if trInfo != nil {
ss.mu.Lock()
if ss.statusCode != codes.OK {
ss.trInfo.tr.LazyLog(stringer(ss.statusDesc), true)
ss.trInfo.tr.SetError()
} else {
ss.trInfo.tr.LazyLog(stringer("OK"), false)
}
ss.trInfo.tr.LazyLog(stringer("OK"), false)
ss.mu.Unlock()
}
errWrite := t.WriteStatus(ss.s, ss.statusCode, ss.statusDesc)
if ss.statusCode != codes.OK {
return Errorf(ss.statusCode, ss.statusDesc)
}
return errWrite
return t.WriteStatus(ss.s, status.New(codes.OK, ""))
}
@@ -854,7 +913,7 @@ func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Str
trInfo.tr.SetError()
}
errDesc := fmt.Sprintf("malformed method name: %q", stream.Method())
if err := t.WriteStatus(stream, codes.InvalidArgument, errDesc); err != nil {
if err := t.WriteStatus(stream, status.New(codes.InvalidArgument, errDesc)); err != nil {
if trInfo != nil {
trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
trInfo.tr.SetError()
@@ -870,12 +929,16 @@ func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Str
method := sm[pos+1:]
srv, ok := s.m[service]
if !ok {
if unknownDesc := s.opts.unknownStreamDesc; unknownDesc != nil {
s.processStreamingRPC(t, stream, nil, unknownDesc, trInfo)
return
}
if trInfo != nil {
trInfo.tr.LazyLog(&fmtStringer{"Unknown service %v", []interface{}{service}}, true)
trInfo.tr.SetError()
}
errDesc := fmt.Sprintf("unknown service %v", service)
if err := t.WriteStatus(stream, codes.Unimplemented, errDesc); err != nil {
if err := t.WriteStatus(stream, status.New(codes.Unimplemented, errDesc)); err != nil {
if trInfo != nil {
trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
trInfo.tr.SetError()
@@ -900,8 +963,12 @@ func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Str
trInfo.tr.LazyLog(&fmtStringer{"Unknown method %v", []interface{}{method}}, true)
trInfo.tr.SetError()
}
if unknownDesc := s.opts.unknownStreamDesc; unknownDesc != nil {
s.processStreamingRPC(t, stream, nil, unknownDesc, trInfo)
return
}
errDesc := fmt.Sprintf("unknown method %v", method)
if err := t.WriteStatus(stream, codes.Unimplemented, errDesc); err != nil {
if err := t.WriteStatus(stream, status.New(codes.Unimplemented, errDesc)); err != nil {
if trInfo != nil {
trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
trInfo.tr.SetError()

112
vendor/google.golang.org/grpc/stats/handlers.go generated vendored
View File

@@ -35,10 +35,8 @@ package stats
import (
"net"
"sync/atomic"
"golang.org/x/net/context"
"google.golang.org/grpc/grpclog"
)
// ConnTagInfo defines the relevant information needed by connection context tagger.
@@ -56,97 +54,23 @@ type RPCTagInfo struct {
FullMethodName string
}
var (
on = new(int32)
rpcHandler func(context.Context, RPCStats)
connHandler func(context.Context, ConnStats)
connTagger func(context.Context, *ConnTagInfo) context.Context
rpcTagger func(context.Context, *RPCTagInfo) context.Context
)
// Handler defines the interface for the related stats handling (e.g., RPCs, connections).
type Handler interface {
// TagRPC can attach some information to the given context.
// The returned context is used in the rest lifetime of the RPC.
TagRPC(context.Context, *RPCTagInfo) context.Context
// HandleRPC processes the RPC stats.
HandleRPC(context.Context, RPCStats)
// HandleRPC processes the RPC stats using the rpc handler registered by the user.
func HandleRPC(ctx context.Context, s RPCStats) {
if rpcHandler == nil {
return
}
rpcHandler(ctx, s)
}
// RegisterRPCHandler registers the user handler function for RPC stats processing.
// It should be called only once. The later call will overwrite the former value if it is called multiple times.
// This handler function will be called to process the rpc stats.
func RegisterRPCHandler(f func(context.Context, RPCStats)) {
rpcHandler = f
}
// HandleConn processes the stats using the call back function registered by user.
func HandleConn(ctx context.Context, s ConnStats) {
if connHandler == nil {
return
}
connHandler(ctx, s)
}
// RegisterConnHandler registers the user handler function for conn stats.
// It should be called only once. The later call will overwrite the former value if it is called multiple times.
// This handler function will be called to process the conn stats.
func RegisterConnHandler(f func(context.Context, ConnStats)) {
connHandler = f
}
// TagConn calls user registered connection context tagger.
func TagConn(ctx context.Context, info *ConnTagInfo) context.Context {
if connTagger == nil {
return ctx
}
return connTagger(ctx, info)
}
// RegisterConnTagger registers the user connection context tagger function.
// The connection context tagger can attach some information to the given context.
// The returned context will be used for stats handling.
// For conn stats handling, the context used in connHandler for this
// connection will be derived from the context returned.
// For RPC stats handling,
// - On server side, the context used in rpcHandler for all RPCs on this
// connection will be derived from the context returned.
// - On client side, the context is not derived from the context returned.
func RegisterConnTagger(t func(context.Context, *ConnTagInfo) context.Context) {
connTagger = t
}
// TagRPC calls the user registered RPC context tagger.
func TagRPC(ctx context.Context, info *RPCTagInfo) context.Context {
if rpcTagger == nil {
return ctx
}
return rpcTagger(ctx, info)
}
// RegisterRPCTagger registers the user RPC context tagger function.
// The RPC context tagger can attach some information to the given context.
// The context used in stats rpcHandler for this RPC will be derived from the
// context returned.
func RegisterRPCTagger(t func(context.Context, *RPCTagInfo) context.Context) {
rpcTagger = t
}
// Start starts the stats collection and processing if there is a registered stats handle.
func Start() {
if rpcHandler == nil && connHandler == nil {
grpclog.Println("rpcHandler and connHandler are both nil when starting stats. Stats is not started")
return
}
atomic.StoreInt32(on, 1)
}
// Stop stops the stats collection and processing.
// Stop does not unregister the handlers.
func Stop() {
atomic.StoreInt32(on, 0)
}
// On indicates whether the stats collection and processing is on.
func On() bool {
return atomic.CompareAndSwapInt32(on, 1, 1)
// TagConn can attach some information to the given context.
// The returned context will be used for stats handling.
// For conn stats handling, the context used in HandleConn for this
// connection will be derived from the context returned.
// For RPC stats handling,
// - On server side, the context used in HandleRPC for all RPCs on this
// connection will be derived from the context returned.
// - On client side, the context is not derived from the context returned.
TagConn(context.Context, *ConnTagInfo) context.Context
// HandleConn processes the Conn stats.
HandleConn(context.Context, ConnStats)
}

2
vendor/google.golang.org/grpc/stats/stats.go generated vendored
View File

@@ -184,7 +184,7 @@ type End struct {
Client bool
// EndTime is the time when the RPC ends.
EndTime time.Time
// Error is the error just happened. Its type is gRPC error.
// Error is the error just happened. It implements status.Status if non-nil.
Error error
}

145
vendor/google.golang.org/grpc/status/status.go generated vendored Normal file
View File

@@ -0,0 +1,145 @@
/*
*
* Copyright 2017, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
// Package status implements errors returned by gRPC. These errors are
// serialized and transmitted on the wire between server and client, and allow
// for additional data to be transmitted via the Details field in the status
// proto. gRPC service handlers should return an error created by this
// package, and gRPC clients should expect a corresponding error to be
// returned from the RPC call.
//
// This package upholds the invariants that a non-nil error may not
// contain an OK code, and an OK code must result in a nil error.
package status
import (
"fmt"
"github.com/golang/protobuf/proto"
spb "google.golang.org/genproto/googleapis/rpc/status"
"google.golang.org/grpc/codes"
)
// statusError is an alias of a status proto. It implements error and Status,
// and a nil statusError should never be returned by this package.
type statusError spb.Status
func (se *statusError) Error() string {
p := (*spb.Status)(se)
return fmt.Sprintf("rpc error: code = %s desc = %s", codes.Code(p.GetCode()), p.GetMessage())
}
func (se *statusError) status() *Status {
return &Status{s: (*spb.Status)(se)}
}
// Status represents an RPC status code, message, and details. It is immutable
// and should be created with New, Newf, or FromProto.
type Status struct {
s *spb.Status
}
// Code returns the status code contained in s.
func (s *Status) Code() codes.Code {
if s == nil || s.s == nil {
return codes.OK
}
return codes.Code(s.s.Code)
}
// Message returns the message contained in s.
func (s *Status) Message() string {
if s == nil || s.s == nil {
return ""
}
return s.s.Message
}
// Proto returns s's status as an spb.Status proto message.
func (s *Status) Proto() *spb.Status {
if s == nil {
return nil
}
return proto.Clone(s.s).(*spb.Status)
}
// Err returns an immutable error representing s; returns nil if s.Code() is
// OK.
func (s *Status) Err() error {
if s.Code() == codes.OK {
return nil
}
return (*statusError)(s.s)
}
// New returns a Status representing c and msg.
func New(c codes.Code, msg string) *Status {
return &Status{s: &spb.Status{Code: int32(c), Message: msg}}
}
// Newf returns New(c, fmt.Sprintf(format, a...)).
func Newf(c codes.Code, format string, a ...interface{}) *Status {
return New(c, fmt.Sprintf(format, a...))
}
// Error returns an error representing c and msg. If c is OK, returns nil.
func Error(c codes.Code, msg string) error {
return New(c, msg).Err()
}
// Errorf returns Error(c, fmt.Sprintf(format, a...)).
func Errorf(c codes.Code, format string, a ...interface{}) error {
return Error(c, fmt.Sprintf(format, a...))
}
// ErrorProto returns an error representing s. If s.Code is OK, returns nil.
func ErrorProto(s *spb.Status) error {
return FromProto(s).Err()
}
// FromProto returns a Status representing s.
func FromProto(s *spb.Status) *Status {
return &Status{s: proto.Clone(s).(*spb.Status)}
}
// FromError returns a Status representing err if it was produced from this
// package, otherwise it returns nil, false.
func FromError(err error) (s *Status, ok bool) {
if err == nil {
return &Status{s: &spb.Status{Code: int32(codes.OK)}}, true
}
if s, ok := err.(*statusError); ok {
return s.status(), true
}
return nil, false
}

177
vendor/google.golang.org/grpc/stream.go generated vendored
View File

@@ -37,7 +37,6 @@ import (
"bytes"
"errors"
"io"
"math"
"sync"
"time"
@@ -46,6 +45,7 @@ import (
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
@@ -107,11 +107,18 @@ func NewClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) {
var (
t transport.ClientTransport
s *transport.Stream
put func()
t transport.ClientTransport
s *transport.Stream
put func()
cancel context.CancelFunc
)
c := defaultCallInfo
if mc, ok := cc.getMethodConfig(method); ok {
c.failFast = !mc.WaitForReady
if mc.Timeout > 0 {
ctx, cancel = context.WithTimeout(ctx, mc.Timeout)
}
}
for _, o := range opts {
if err := o.before(&c); err != nil {
return nil, toRPCErr(err)
@@ -144,23 +151,25 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
}
}()
}
if stats.On() {
ctx = stats.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method})
ctx = newContextWithRPCInfo(ctx)
sh := cc.dopts.copts.StatsHandler
if sh != nil {
ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method})
begin := &stats.Begin{
Client: true,
BeginTime: time.Now(),
FailFast: c.failFast,
}
stats.HandleRPC(ctx, begin)
sh.HandleRPC(ctx, begin)
}
defer func() {
if err != nil && stats.On() {
if err != nil && sh != nil {
// Only handle end stats if err != nil.
end := &stats.End{
Client: true,
Error: err,
}
stats.HandleRPC(ctx, end)
sh.HandleRPC(ctx, end)
}
}()
gopts := BalancerGetOptions{
@@ -170,7 +179,7 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
t, put, err = cc.getTransport(ctx, gopts)
if err != nil {
// TODO(zhaoq): Probably revisit the error handling.
if _, ok := err.(*rpcError); ok {
if _, ok := status.FromError(err); ok {
return nil, err
}
if err == errConnClosing || err == errConnUnavailable {
@@ -185,14 +194,17 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
s, err = t.NewStream(ctx, callHdr)
if err != nil {
if _, ok := err.(transport.ConnectionError); ok && put != nil {
// If error is connection error, transport was sending data on wire,
// and we are not sure if anything has been sent on wire.
// If error is not connection error, we are sure nothing has been sent.
updateRPCInfoInContext(ctx, rpcInfo{bytesSent: true, bytesReceived: false})
}
if put != nil {
put()
put = nil
}
if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain {
if c.failFast {
return nil, toRPCErr(err)
}
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
}
return nil, toRPCErr(err)
@@ -200,12 +212,14 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
break
}
cs := &clientStream{
opts: opts,
c: c,
desc: desc,
codec: cc.dopts.codec,
cp: cc.dopts.cp,
dc: cc.dopts.dc,
opts: opts,
c: c,
desc: desc,
codec: cc.dopts.codec,
cp: cc.dopts.cp,
dc: cc.dopts.dc,
maxMsgSize: cc.dopts.maxMsgSize,
cancel: cancel,
put: put,
t: t,
@@ -215,7 +229,8 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
tracing: EnableTracing,
trInfo: trInfo,
statsCtx: ctx,
statsCtx: ctx,
statsHandler: cc.dopts.copts.StatsHandler,
}
if cc.dopts.cp != nil {
cs.cbuf = new(bytes.Buffer)
@@ -226,14 +241,13 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
select {
case <-t.Error():
// Incur transport error, simply exit.
case <-cc.ctx.Done():
cs.finish(ErrClientConnClosing)
cs.closeTransportStream(ErrClientConnClosing)
case <-s.Done():
// TODO: The trace of the RPC is terminated here when there is no pending
// I/O, which is probably not the optimal solution.
if s.StatusCode() == codes.OK {
cs.finish(nil)
} else {
cs.finish(Errorf(s.StatusCode(), "%s", s.StatusDesc()))
}
cs.finish(s.Status().Err())
cs.closeTransportStream(nil)
case <-s.GoAway():
cs.finish(errConnDrain)
@@ -249,22 +263,25 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
// clientStream implements a client side Stream.
type clientStream struct {
opts []CallOption
c callInfo
t transport.ClientTransport
s *transport.Stream
p *parser
desc *StreamDesc
codec Codec
cp Compressor
cbuf *bytes.Buffer
dc Decompressor
opts []CallOption
c callInfo
t transport.ClientTransport
s *transport.Stream
p *parser
desc *StreamDesc
codec Codec
cp Compressor
cbuf *bytes.Buffer
dc Decompressor
maxMsgSize int
cancel context.CancelFunc
tracing bool // set to EnableTracing when the clientStream is created.
mu sync.Mutex
put func()
closed bool
mu sync.Mutex
put func()
closed bool
finished bool
// trInfo.tr is set when the clientStream is created (if EnableTracing is true),
// and is set to nil when the clientStream's finish method is called.
trInfo traceInfo
@@ -272,7 +289,8 @@ type clientStream struct {
// statsCtx keeps the user context for stats handling.
// All stats collection should use the statsCtx (instead of the stream context)
// so that all the generated stats for a particular RPC can be associated in the processing phase.
statsCtx context.Context
statsCtx context.Context
statsHandler stats.Handler
}
func (cs *clientStream) Context() context.Context {
@@ -326,7 +344,7 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
err = toRPCErr(err)
}()
var outPayload *stats.OutPayload
if stats.On() {
if cs.statsHandler != nil {
outPayload = &stats.OutPayload{
Client: true,
}
@@ -343,34 +361,19 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
err = cs.t.Write(cs.s, out, &transport.Options{Last: false})
if err == nil && outPayload != nil {
outPayload.SentTime = time.Now()
stats.HandleRPC(cs.statsCtx, outPayload)
cs.statsHandler.HandleRPC(cs.statsCtx, outPayload)
}
return err
}
func (cs *clientStream) RecvMsg(m interface{}) (err error) {
defer func() {
if err != nil && stats.On() {
// Only generate End if err != nil.
// If err == nil, it's not the last RecvMsg.
// The last RecvMsg gets either an RPC error or io.EOF.
end := &stats.End{
Client: true,
EndTime: time.Now(),
}
if err != io.EOF {
end.Error = toRPCErr(err)
}
stats.HandleRPC(cs.statsCtx, end)
}
}()
var inPayload *stats.InPayload
if stats.On() {
if cs.statsHandler != nil {
inPayload = &stats.InPayload{
Client: true,
}
}
err = recv(cs.p, cs.codec, cs.s, cs.dc, m, math.MaxInt32, inPayload)
err = recv(cs.p, cs.codec, cs.s, cs.dc, m, cs.maxMsgSize, inPayload)
defer func() {
// err != nil indicates the termination of the stream.
if err != nil {
@@ -386,24 +389,24 @@ func (cs *clientStream) RecvMsg(m interface{}) (err error) {
cs.mu.Unlock()
}
if inPayload != nil {
stats.HandleRPC(cs.statsCtx, inPayload)
cs.statsHandler.HandleRPC(cs.statsCtx, inPayload)
}
if !cs.desc.ClientStreams || cs.desc.ServerStreams {
return
}
// Special handling for client streaming rpc.
// This recv expects EOF or errors, so we don't collect inPayload.
err = recv(cs.p, cs.codec, cs.s, cs.dc, m, math.MaxInt32, nil)
err = recv(cs.p, cs.codec, cs.s, cs.dc, m, cs.maxMsgSize, nil)
cs.closeTransportStream(err)
if err == nil {
return toRPCErr(errors.New("grpc: client streaming protocol violation: get <nil>, want <EOF>"))
}
if err == io.EOF {
if cs.s.StatusCode() == codes.OK {
cs.finish(err)
return nil
if se := cs.s.Status().Err(); se != nil {
return se
}
return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc())
cs.finish(err)
return nil
}
return toRPCErr(err)
}
@@ -411,11 +414,11 @@ func (cs *clientStream) RecvMsg(m interface{}) (err error) {
cs.closeTransportStream(err)
}
if err == io.EOF {
if cs.s.StatusCode() == codes.OK {
// Returns io.EOF to indicate the end of the stream.
return
if statusErr := cs.s.Status().Err(); statusErr != nil {
return statusErr
}
return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc())
// Returns io.EOF to indicate the end of the stream.
return
}
return toRPCErr(err)
}
@@ -451,13 +454,37 @@ func (cs *clientStream) closeTransportStream(err error) {
func (cs *clientStream) finish(err error) {
cs.mu.Lock()
defer cs.mu.Unlock()
if cs.finished {
return
}
cs.finished = true
defer func() {
if cs.cancel != nil {
cs.cancel()
}
}()
for _, o := range cs.opts {
o.after(&cs.c)
}
if cs.put != nil {
updateRPCInfoInContext(cs.s.Context(), rpcInfo{
bytesSent: cs.s.BytesSent(),
bytesReceived: cs.s.BytesReceived(),
})
cs.put()
cs.put = nil
}
if cs.statsHandler != nil {
end := &stats.End{
Client: true,
EndTime: time.Now(),
}
if err != io.EOF {
// end.Error is nil if the RPC finished successfully.
end.Error = toRPCErr(err)
}
cs.statsHandler.HandleRPC(cs.statsCtx, end)
}
if !cs.tracing {
return
}
@@ -502,10 +529,10 @@ type serverStream struct {
dc Decompressor
cbuf *bytes.Buffer
maxMsgSize int
statusCode codes.Code
statusDesc string
trInfo *traceInfo
statsHandler stats.Handler
mu sync.Mutex // protects trInfo.tr after the service handler runs.
}
@@ -548,7 +575,7 @@ func (ss *serverStream) SendMsg(m interface{}) (err error) {
}
}()
var outPayload *stats.OutPayload
if stats.On() {
if ss.statsHandler != nil {
outPayload = &stats.OutPayload{}
}
out, err := encode(ss.codec, m, ss.cp, ss.cbuf, outPayload)
@@ -566,7 +593,7 @@ func (ss *serverStream) SendMsg(m interface{}) (err error) {
}
if outPayload != nil {
outPayload.SentTime = time.Now()
stats.HandleRPC(ss.s.Context(), outPayload)
ss.statsHandler.HandleRPC(ss.s.Context(), outPayload)
}
return nil
}
@@ -587,7 +614,7 @@ func (ss *serverStream) RecvMsg(m interface{}) (err error) {
}
}()
var inPayload *stats.InPayload
if stats.On() {
if ss.statsHandler != nil {
inPayload = &stats.InPayload{}
}
if err := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxMsgSize, inPayload); err != nil {
@@ -600,7 +627,7 @@ func (ss *serverStream) RecvMsg(m interface{}) (err error) {
return toRPCErr(err)
}
if inPayload != nil {
stats.HandleRPC(ss.s.Context(), inPayload)
ss.statsHandler.HandleRPC(ss.s.Context(), inPayload)
}
return nil
}

18
vendor/google.golang.org/grpc/transport/control.go generated vendored
View File

@@ -35,7 +35,9 @@ package transport
import (
"fmt"
"math"
"sync"
"time"
"golang.org/x/net/http2"
)
@@ -44,8 +46,18 @@ const (
// The default value of flow control window size in HTTP2 spec.
defaultWindowSize = 65535
// The initial window size for flow control.
initialWindowSize = defaultWindowSize // for an RPC
initialConnWindowSize = defaultWindowSize * 16 // for a connection
initialWindowSize = defaultWindowSize // for an RPC
initialConnWindowSize = defaultWindowSize * 16 // for a connection
infinity = time.Duration(math.MaxInt64)
defaultClientKeepaliveTime = infinity
defaultClientKeepaliveTimeout = time.Duration(20 * time.Second)
defaultMaxStreamsClient = 100
defaultMaxConnectionIdle = infinity
defaultMaxConnectionAge = infinity
defaultMaxConnectionAgeGrace = infinity
defaultServerKeepaliveTime = time.Duration(2 * time.Hour)
defaultServerKeepaliveTimeout = time.Duration(20 * time.Second)
defaultKeepalivePolicyMinTime = time.Duration(5 * time.Minute)
)
// The following defines various control items which could flow through
@@ -73,6 +85,8 @@ type resetStream struct {
func (*resetStream) item() {}
type goAway struct {
code http2.ErrCode
debugData []byte
}
func (*goAway) item() {}

27
vendor/google.golang.org/grpc/transport/handler_server.go generated vendored
View File

@@ -53,6 +53,7 @@ import (
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/status"
)
// NewServerHandlerTransport returns a ServerTransport handling gRPC
@@ -110,6 +111,10 @@ func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request) (ServerTr
v = v[:i]
}
}
v, err := decodeMetadataHeader(k, v)
if err != nil {
return nil, streamErrorf(codes.InvalidArgument, "malformed binary metadata: %v", err)
}
metakv = append(metakv, k, v)
}
}
@@ -182,7 +187,7 @@ func (ht *serverHandlerTransport) do(fn func()) error {
}
}
func (ht *serverHandlerTransport) WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error {
func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) error {
err := ht.do(func() {
ht.writeCommonHeaders(s)
@@ -192,10 +197,13 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, statusCode codes.Code,
ht.rw.(http.Flusher).Flush()
h := ht.rw.Header()
h.Set("Grpc-Status", fmt.Sprintf("%d", statusCode))
if statusDesc != "" {
h.Set("Grpc-Message", encodeGrpcMessage(statusDesc))
h.Set("Grpc-Status", fmt.Sprintf("%d", st.Code()))
if m := st.Message(); m != "" {
h.Set("Grpc-Message", encodeGrpcMessage(m))
}
// TODO: Support Grpc-Status-Details-Bin
if md := s.Trailer(); len(md) > 0 {
for k, vv := range md {
// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
@@ -203,10 +211,9 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, statusCode codes.Code,
continue
}
for _, v := range vv {
// http2 ResponseWriter mechanism to
// send undeclared Trailers after the
// headers have possibly been written.
h.Add(http2.TrailerPrefix+k, v)
// http2 ResponseWriter mechanism to send undeclared Trailers after
// the headers have possibly been written.
h.Add(http2.TrailerPrefix+k, encodeMetadataHeader(k, v))
}
}
}
@@ -234,6 +241,7 @@ func (ht *serverHandlerTransport) writeCommonHeaders(s *Stream) {
// and https://golang.org/pkg/net/http/#example_ResponseWriter_trailers
h.Add("Trailer", "Grpc-Status")
h.Add("Trailer", "Grpc-Message")
// TODO: Support Grpc-Status-Details-Bin
if s.sendCompress != "" {
h.Set("Grpc-Encoding", s.sendCompress)
@@ -260,6 +268,7 @@ func (ht *serverHandlerTransport) WriteHeader(s *Stream, md metadata.MD) error {
continue
}
for _, v := range vv {
v = encodeMetadataHeader(k, v)
h.Add(k, v)
}
}
@@ -314,7 +323,7 @@ func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream), trace
if req.TLS != nil {
pr.AuthInfo = credentials.TLSInfo{State: *req.TLS}
}
ctx = metadata.NewContext(ctx, ht.headerMD)
ctx = metadata.NewIncomingContext(ctx, ht.headerMD)
ctx = peer.NewContext(ctx, pr)
s.ctx = newContextWithStream(ctx, s)
s.dec = &recvBufferReader{ctx: s.ctx, recv: s.buf}

328
vendor/google.golang.org/grpc/transport/http2_client.go generated vendored
View File

@@ -35,12 +35,12 @@ package transport
import (
"bytes"
"fmt"
"io"
"math"
"net"
"strings"
"sync"
"sync/atomic"
"time"
"golang.org/x/net/context"
@@ -49,9 +49,11 @@ import (
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/keepalive"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
)
// http2Client implements the ClientTransport interface with HTTP2.
@@ -80,6 +82,8 @@ type http2Client struct {
// goAway is closed to notify the upper layer (i.e., addrConn.transportMonitor)
// that the server sent GoAway on this transport.
goAway chan struct{}
// awakenKeepalive is used to wake up keepalive when after it has gone dormant.
awakenKeepalive chan struct{}
framer *framer
hBuf *bytes.Buffer // the buffer for HPACK encoding
@@ -99,6 +103,13 @@ type http2Client struct {
creds []credentials.PerRPCCredentials
// Boolean to keep track of reading activity on transport.
// 1 is true and 0 is false.
activity uint32 // Accessed atomically.
kp keepalive.ClientParameters
statsHandler stats.Handler
mu sync.Mutex // guard the following variables
state transportState // the state of underlying connection
activeStreams map[uint32]*Stream
@@ -110,6 +121,9 @@ type http2Client struct {
goAwayID uint32
// prevGoAway ID records the Last-Stream-ID in the previous GOAway frame.
prevGoAwayID uint32
// goAwayReason records the http2.ErrCode and debug data received with the
// GoAway frame.
goAwayReason GoAwayReason
}
func dial(ctx context.Context, fn func(context.Context, string) (net.Conn, error), addr string) (net.Conn, error) {
@@ -176,15 +190,19 @@ func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (
return nil, connectionErrorf(temp, err, "transport: %v", err)
}
}
ua := primaryUA
if opts.UserAgent != "" {
ua = opts.UserAgent + " " + ua
kp := opts.KeepaliveParams
// Validate keepalive parameters.
if kp.Time == 0 {
kp.Time = defaultClientKeepaliveTime
}
if kp.Timeout == 0 {
kp.Timeout = defaultClientKeepaliveTimeout
}
var buf bytes.Buffer
t := &http2Client{
ctx: ctx,
target: addr.Addr,
userAgent: ua,
userAgent: opts.UserAgent,
md: addr.Metadata,
conn: conn,
remoteAddr: conn.RemoteAddr(),
@@ -196,6 +214,7 @@ func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (
shutdownChan: make(chan struct{}),
errorChan: make(chan struct{}),
goAway: make(chan struct{}),
awakenKeepalive: make(chan struct{}, 1),
framer: newFramer(conn),
hBuf: &buf,
hEnc: hpack.NewEncoder(&buf),
@@ -206,8 +225,24 @@ func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (
state: reachable,
activeStreams: make(map[uint32]*Stream),
creds: opts.PerRPCCredentials,
maxStreams: math.MaxInt32,
maxStreams: defaultMaxStreamsClient,
streamsQuota: newQuotaPool(defaultMaxStreamsClient),
streamSendQuota: defaultWindowSize,
kp: kp,
statsHandler: opts.StatsHandler,
}
// Make sure awakenKeepalive can't be written upon.
// keepalive routine will make it writable, if need be.
t.awakenKeepalive <- struct{}{}
if t.statsHandler != nil {
t.ctx = t.statsHandler.TagConn(t.ctx, &stats.ConnTagInfo{
RemoteAddr: t.remoteAddr,
LocalAddr: t.localAddr,
})
connBegin := &stats.ConnBegin{
Client: true,
}
t.statsHandler.HandleConn(t.ctx, connBegin)
}
// Start the reader goroutine for incoming message. Each transport has
// a dedicated goroutine which reads HTTP2 frame from network. Then it
@@ -243,17 +278,10 @@ func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (
}
}
go t.controller()
t.writableChan <- 0
if stats.On() {
t.ctx = stats.TagConn(t.ctx, &stats.ConnTagInfo{
RemoteAddr: t.remoteAddr,
LocalAddr: t.localAddr,
})
connBegin := &stats.ConnBegin{
Client: true,
}
stats.HandleConn(t.ctx, connBegin)
if t.kp.Time != infinity {
go t.keepalive()
}
t.writableChan <- 0
return t, nil
}
@@ -286,7 +314,7 @@ func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream {
return s
}
// NewStream creates a stream and register it into the transport as "active"
// NewStream creates a stream and registers it into the transport as "active"
// streams.
func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Stream, err error) {
pr := &peer.Peer{
@@ -334,21 +362,18 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
t.mu.Unlock()
return nil, ErrConnClosing
}
checkStreamsQuota := t.streamsQuota != nil
t.mu.Unlock()
if checkStreamsQuota {
sq, err := wait(ctx, nil, nil, t.shutdownChan, t.streamsQuota.acquire())
if err != nil {
return nil, err
}
// Returns the quota balance back.
if sq > 1 {
t.streamsQuota.add(sq - 1)
}
sq, err := wait(ctx, nil, nil, t.shutdownChan, t.streamsQuota.acquire())
if err != nil {
return nil, err
}
// Returns the quota balance back.
if sq > 1 {
t.streamsQuota.add(sq - 1)
}
if _, err := wait(ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil {
// Return the quota back now because there is no stream returned to the caller.
if _, ok := err.(StreamError); ok && checkStreamsQuota {
if _, ok := err.(StreamError); ok {
t.streamsQuota.add(1)
}
return nil, err
@@ -356,9 +381,7 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
t.mu.Lock()
if t.state == draining {
t.mu.Unlock()
if checkStreamsQuota {
t.streamsQuota.add(1)
}
t.streamsQuota.add(1)
// Need to make t writable again so that the rpc in flight can still proceed.
t.writableChan <- 0
return nil, ErrStreamDrain
@@ -370,17 +393,17 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
s := t.newStream(ctx, callHdr)
s.clientStatsCtx = userCtx
t.activeStreams[s.id] = s
// If the number of active streams change from 0 to 1, then check if keepalive
// has gone dormant. If so, wake it up.
if len(t.activeStreams) == 1 {
select {
case t.awakenKeepalive <- struct{}{}:
t.framer.writePing(false, false, [8]byte{})
default:
}
}
// This stream is not counted when applySetings(...) initialize t.streamsQuota.
// Reset t.streamsQuota to the right value.
var reset bool
if !checkStreamsQuota && t.streamsQuota != nil {
reset = true
}
t.mu.Unlock()
if reset {
t.streamsQuota.add(-1)
}
// HPACK encodes various headers. Note that once WriteField(...) is
// called, the corresponding headers/continuation frame has to be sent
@@ -412,25 +435,25 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
hasMD bool
endHeaders bool
)
if md, ok := metadata.FromContext(ctx); ok {
if md, ok := metadata.FromOutgoingContext(ctx); ok {
hasMD = true
for k, v := range md {
for k, vv := range md {
// HTTP doesn't allow you to set pseudoheaders after non pseudoheaders were set.
if isReservedHeader(k) {
continue
}
for _, entry := range v {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry})
for _, v := range vv {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
}
if md, ok := t.md.(*metadata.MD); ok {
for k, v := range *md {
for k, vv := range *md {
if isReservedHeader(k) {
continue
}
for _, entry := range v {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry})
for _, v := range vv {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
}
@@ -470,7 +493,9 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
return nil, connectionErrorf(true, err, "transport: %v", err)
}
}
if stats.On() {
s.bytesSent = true
if t.statsHandler != nil {
outHeader := &stats.OutHeader{
Client: true,
WireLength: bufLen,
@@ -479,7 +504,7 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
LocalAddr: t.localAddr,
Compression: callHdr.SendCompress,
}
stats.HandleRPC(s.clientStatsCtx, outHeader)
t.statsHandler.HandleRPC(s.clientStatsCtx, outHeader)
}
t.writableChan <- 0
return s, nil
@@ -488,15 +513,11 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
// CloseStream clears the footprint of a stream when the stream is not needed any more.
// This must not be executed in reader's goroutine.
func (t *http2Client) CloseStream(s *Stream, err error) {
var updateStreams bool
t.mu.Lock()
if t.activeStreams == nil {
t.mu.Unlock()
return
}
if t.streamsQuota != nil {
updateStreams = true
}
delete(t.activeStreams, s.id)
if t.state == draining && len(t.activeStreams) == 0 {
// The transport is draining and s is the last live stream on t.
@@ -505,10 +526,27 @@ func (t *http2Client) CloseStream(s *Stream, err error) {
return
}
t.mu.Unlock()
if updateStreams {
t.streamsQuota.add(1)
}
// rstStream is true in case the stream is being closed at the client-side
// and the server needs to be intimated about it by sending a RST_STREAM
// frame.
// To make sure this frame is written to the wire before the headers of the
// next stream waiting for streamsQuota, we add to streamsQuota pool only
// after having acquired the writableChan to send RST_STREAM out (look at
// the controller() routine).
var rstStream bool
var rstError http2.ErrCode
defer func() {
// In case, the client doesn't have to send RST_STREAM to server
// we can safely add back to streamsQuota pool now.
if !rstStream {
t.streamsQuota.add(1)
return
}
t.controlBuf.put(&resetStream{s.id, rstError})
}()
s.mu.Lock()
rstStream = s.rstStream
rstError = s.rstError
if q := s.fc.resetPendingData(); q > 0 {
if n := t.fc.onRead(q); n > 0 {
t.controlBuf.put(&windowUpdate{0, n})
@@ -524,8 +562,9 @@ func (t *http2Client) CloseStream(s *Stream, err error) {
}
s.state = streamDone
s.mu.Unlock()
if se, ok := err.(StreamError); ok && se.Code != codes.DeadlineExceeded {
t.controlBuf.put(&resetStream{s.id, http2.ErrCodeCancel})
if _, ok := err.(StreamError); ok {
rstStream = true
rstError = http2.ErrCodeCancel
}
}
@@ -559,11 +598,11 @@ func (t *http2Client) Close() (err error) {
s.mu.Unlock()
s.write(recvMsg{err: ErrConnClosing})
}
if stats.On() {
if t.statsHandler != nil {
connEnd := &stats.ConnEnd{
Client: true,
}
stats.HandleConn(t.ctx, connEnd)
t.statsHandler.HandleConn(t.ctx, connEnd)
}
return
}
@@ -739,7 +778,7 @@ func (t *http2Client) updateWindow(s *Stream, n uint32) {
}
func (t *http2Client) handleData(f *http2.DataFrame) {
size := len(f.Data())
size := f.Header().Length
if err := t.fc.onData(uint32(size)); err != nil {
t.notifyError(connectionErrorf(true, err, "%v", err))
return
@@ -753,6 +792,11 @@ func (t *http2Client) handleData(f *http2.DataFrame) {
return
}
if size > 0 {
if f.Header().Flags.Has(http2.FlagDataPadded) {
if w := t.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
t.controlBuf.put(&windowUpdate{0, w})
}
}
s.mu.Lock()
if s.state == streamDone {
s.mu.Unlock()
@@ -763,22 +807,27 @@ func (t *http2Client) handleData(f *http2.DataFrame) {
return
}
if err := s.fc.onData(uint32(size)); err != nil {
s.state = streamDone
s.statusCode = codes.Internal
s.statusDesc = err.Error()
close(s.done)
s.rstStream = true
s.rstError = http2.ErrCodeFlowControl
s.finish(status.New(codes.Internal, err.Error()))
s.mu.Unlock()
s.write(recvMsg{err: io.EOF})
t.controlBuf.put(&resetStream{s.id, http2.ErrCodeFlowControl})
return
}
if f.Header().Flags.Has(http2.FlagDataPadded) {
if w := s.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
t.controlBuf.put(&windowUpdate{s.id, w})
}
}
s.mu.Unlock()
// TODO(bradfitz, zhaoq): A copy is required here because there is no
// guarantee f.Data() is consumed before the arrival of next frame.
// Can this copy be eliminated?
data := make([]byte, size)
copy(data, f.Data())
s.write(recvMsg{data: data})
if len(f.Data()) > 0 {
data := make([]byte, len(f.Data()))
copy(data, f.Data())
s.write(recvMsg{data: data})
}
}
// The server has closed the stream without sending trailers. Record that
// the read direction is closed, and set the status appropriately.
@@ -788,10 +837,7 @@ func (t *http2Client) handleData(f *http2.DataFrame) {
s.mu.Unlock()
return
}
s.state = streamDone
s.statusCode = codes.Internal
s.statusDesc = "server closed the stream without sending trailers"
close(s.done)
s.finish(status.New(codes.Internal, "server closed the stream without sending trailers"))
s.mu.Unlock()
s.write(recvMsg{err: io.EOF})
}
@@ -807,18 +853,16 @@ func (t *http2Client) handleRSTStream(f *http2.RSTStreamFrame) {
s.mu.Unlock()
return
}
s.state = streamDone
if !s.headerDone {
close(s.headerChan)
s.headerDone = true
}
s.statusCode, ok = http2ErrConvTab[http2.ErrCode(f.ErrCode)]
statusCode, ok := http2ErrConvTab[http2.ErrCode(f.ErrCode)]
if !ok {
grpclog.Println("transport: http2Client.handleRSTStream found no mapped gRPC status for the received http2 error ", f.ErrCode)
s.statusCode = codes.Unknown
statusCode = codes.Unknown
}
s.statusDesc = fmt.Sprintf("stream terminated by RST_STREAM with error code: %d", f.ErrCode)
close(s.done)
s.finish(status.Newf(statusCode, "stream terminated by RST_STREAM with error code: %d", f.ErrCode))
s.mu.Unlock()
s.write(recvMsg{err: io.EOF})
}
@@ -846,6 +890,9 @@ func (t *http2Client) handlePing(f *http2.PingFrame) {
}
func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) {
if f.ErrCode == http2.ErrCodeEnhanceYourCalm {
grpclog.Printf("Client received GoAway with http2.ErrCodeEnhanceYourCalm.")
}
t.mu.Lock()
if t.state == reachable || t.state == draining {
if f.LastStreamID > 0 && f.LastStreamID%2 != 1 {
@@ -867,6 +914,7 @@ func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) {
t.mu.Unlock()
return
default:
t.setGoAwayReason(f)
}
t.goAwayID = f.LastStreamID
close(t.goAway)
@@ -874,6 +922,26 @@ func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) {
t.mu.Unlock()
}
// setGoAwayReason sets the value of t.goAwayReason based
// on the GoAway frame received.
// It expects a lock on transport's mutext to be held by
// the caller.
func (t *http2Client) setGoAwayReason(f *http2.GoAwayFrame) {
t.goAwayReason = NoReason
switch f.ErrCode {
case http2.ErrCodeEnhanceYourCalm:
if string(f.DebugData()) == "too_many_pings" {
t.goAwayReason = TooManyPings
}
}
}
func (t *http2Client) GetGoAwayReason() GoAwayReason {
t.mu.Lock()
defer t.mu.Unlock()
return t.goAwayReason
}
func (t *http2Client) handleWindowUpdate(f *http2.WindowUpdateFrame) {
id := f.Header().StreamID
incr := f.Increment
@@ -892,38 +960,38 @@ func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) {
if !ok {
return
}
s.bytesReceived = true
var state decodeState
for _, hf := range frame.Fields {
state.processHeaderField(hf)
}
if state.err != nil {
s.mu.Lock()
if !s.headerDone {
close(s.headerChan)
s.headerDone = true
if err := state.processHeaderField(hf); err != nil {
s.mu.Lock()
if !s.headerDone {
close(s.headerChan)
s.headerDone = true
}
s.mu.Unlock()
s.write(recvMsg{err: err})
// Something wrong. Stops reading even when there is remaining.
return
}
s.mu.Unlock()
s.write(recvMsg{err: state.err})
// Something wrong. Stops reading even when there is remaining.
return
}
endStream := frame.StreamEnded()
var isHeader bool
defer func() {
if stats.On() {
if t.statsHandler != nil {
if isHeader {
inHeader := &stats.InHeader{
Client: true,
WireLength: int(frame.Header().Length),
}
stats.HandleRPC(s.clientStatsCtx, inHeader)
t.statsHandler.HandleRPC(s.clientStatsCtx, inHeader)
} else {
inTrailer := &stats.InTrailer{
Client: true,
WireLength: int(frame.Header().Length),
}
stats.HandleRPC(s.clientStatsCtx, inTrailer)
t.statsHandler.HandleRPC(s.clientStatsCtx, inTrailer)
}
}
}()
@@ -948,10 +1016,7 @@ func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) {
if len(state.mdata) > 0 {
s.trailer = state.mdata
}
s.statusCode = state.statusCode
s.statusDesc = state.statusDesc
close(s.done)
s.state = streamDone
s.finish(state.status())
s.mu.Unlock()
s.write(recvMsg{err: io.EOF})
}
@@ -979,6 +1044,7 @@ func (t *http2Client) reader() {
t.notifyError(err)
return
}
atomic.CompareAndSwapUint32(&t.activity, 0, 1)
sf, ok := frame.(*http2.SettingsFrame)
if !ok {
t.notifyError(err)
@@ -989,6 +1055,7 @@ func (t *http2Client) reader() {
// loop to keep reading incoming messages on this transport.
for {
frame, err := t.framer.readFrame()
atomic.CompareAndSwapUint32(&t.activity, 0, 1)
if err != nil {
// Abort an active stream if the http2.Framer returns a
// http2.StreamError. This can happen only if the server's response
@@ -1040,16 +1107,10 @@ func (t *http2Client) applySettings(ss []http2.Setting) {
s.Val = math.MaxInt32
}
t.mu.Lock()
reset := t.streamsQuota != nil
if !reset {
t.streamsQuota = newQuotaPool(int(s.Val) - len(t.activeStreams))
}
ms := t.maxStreams
t.maxStreams = int(s.Val)
t.mu.Unlock()
if reset {
t.streamsQuota.add(int(s.Val) - ms)
}
t.streamsQuota.add(int(s.Val) - ms)
case http2.SettingInitialWindowSize:
t.mu.Lock()
for _, stream := range t.activeStreams {
@@ -1082,6 +1143,12 @@ func (t *http2Client) controller() {
t.framer.writeSettings(true, i.ss...)
}
case *resetStream:
// If the server needs to be to intimated about stream closing,
// then we need to make sure the RST_STREAM frame is written to
// the wire before the headers of the next stream waiting on
// streamQuota. We ensure this by adding to the streamsQuota pool
// only after having acquired the writableChan to send RST_STREAM.
t.streamsQuota.add(1)
t.framer.writeRSTStream(true, i.streamID, i.code)
case *flushIO:
t.framer.flushWrite()
@@ -1101,6 +1168,61 @@ func (t *http2Client) controller() {
}
}
// keepalive running in a separate goroutune makes sure the connection is alive by sending pings.
func (t *http2Client) keepalive() {
p := &ping{data: [8]byte{}}
timer := time.NewTimer(t.kp.Time)
for {
select {
case <-timer.C:
if atomic.CompareAndSwapUint32(&t.activity, 1, 0) {
timer.Reset(t.kp.Time)
continue
}
// Check if keepalive should go dormant.
t.mu.Lock()
if len(t.activeStreams) < 1 && !t.kp.PermitWithoutStream {
// Make awakenKeepalive writable.
<-t.awakenKeepalive
t.mu.Unlock()
select {
case <-t.awakenKeepalive:
// If the control gets here a ping has been sent
// need to reset the timer with keepalive.Timeout.
case <-t.shutdownChan:
return
}
} else {
t.mu.Unlock()
// Send ping.
t.controlBuf.put(p)
}
// By the time control gets here a ping has been sent one way or the other.
timer.Reset(t.kp.Timeout)
select {
case <-timer.C:
if atomic.CompareAndSwapUint32(&t.activity, 1, 0) {
timer.Reset(t.kp.Time)
continue
}
t.Close()
return
case <-t.shutdownChan:
if !timer.Stop() {
<-timer.C
}
return
}
case <-t.shutdownChan:
if !timer.Stop() {
<-timer.C
}
return
}
}
}
func (t *http2Client) Error() <-chan struct{} {
return t.errorChan
}

308
vendor/google.golang.org/grpc/transport/http2_server.go generated vendored
View File

@@ -38,19 +38,25 @@ import (
"errors"
"io"
"math"
"math/rand"
"net"
"strconv"
"sync"
"sync/atomic"
"time"
"github.com/golang/protobuf/proto"
"golang.org/x/net/context"
"golang.org/x/net/http2"
"golang.org/x/net/http2/hpack"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/keepalive"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
"google.golang.org/grpc/tap"
)
@@ -88,11 +94,35 @@ type http2Server struct {
// sendQuotaPool provides flow control to outbound message.
sendQuotaPool *quotaPool
stats stats.Handler
// Flag to keep track of reading activity on transport.
// 1 is true and 0 is false.
activity uint32 // Accessed atomically.
// Keepalive and max-age parameters for the server.
kp keepalive.ServerParameters
// Keepalive enforcement policy.
kep keepalive.EnforcementPolicy
// The time instance last ping was received.
lastPingAt time.Time
// Number of times the client has violated keepalive ping policy so far.
pingStrikes uint8
// Flag to signify that number of ping strikes should be reset to 0.
// This is set whenever data or header frames are sent.
// 1 means yes.
resetPingStrikes uint32 // Accessed atomically.
mu sync.Mutex // guard the following
state transportState
activeStreams map[uint32]*Stream
// the per-stream outbound flow control window size set by the peer.
streamSendQuota uint32
// idle is the time instant when the connection went idle.
// This is either the begining of the connection or when the number of
// RPCs go down to 0.
// When the connection is busy, this value is set to 0.
idle time.Time
}
// newHTTP2Server constructs a ServerTransport based on HTTP2. ConnectionError is
@@ -126,6 +156,28 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
return nil, connectionErrorf(true, err, "transport: %v", err)
}
}
kp := config.KeepaliveParams
if kp.MaxConnectionIdle == 0 {
kp.MaxConnectionIdle = defaultMaxConnectionIdle
}
if kp.MaxConnectionAge == 0 {
kp.MaxConnectionAge = defaultMaxConnectionAge
}
// Add a jitter to MaxConnectionAge.
kp.MaxConnectionAge += getJitter(kp.MaxConnectionAge)
if kp.MaxConnectionAgeGrace == 0 {
kp.MaxConnectionAgeGrace = defaultMaxConnectionAgeGrace
}
if kp.Time == 0 {
kp.Time = defaultServerKeepaliveTime
}
if kp.Timeout == 0 {
kp.Timeout = defaultServerKeepaliveTimeout
}
kep := config.KeepalivePolicy
if kep.MinTime == 0 {
kep.MinTime = defaultKeepalivePolicyMinTime
}
var buf bytes.Buffer
t := &http2Server{
ctx: context.Background(),
@@ -146,16 +198,21 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
shutdownChan: make(chan struct{}),
activeStreams: make(map[uint32]*Stream),
streamSendQuota: defaultWindowSize,
stats: config.StatsHandler,
kp: kp,
idle: time.Now(),
kep: kep,
}
if stats.On() {
t.ctx = stats.TagConn(t.ctx, &stats.ConnTagInfo{
if t.stats != nil {
t.ctx = t.stats.TagConn(t.ctx, &stats.ConnTagInfo{
RemoteAddr: t.remoteAddr,
LocalAddr: t.localAddr,
})
connBegin := &stats.ConnBegin{}
stats.HandleConn(t.ctx, connBegin)
t.stats.HandleConn(t.ctx, connBegin)
}
go t.controller()
go t.keepalive()
t.writableChan <- 0
return t, nil
}
@@ -172,13 +229,12 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
var state decodeState
for _, hf := range frame.Fields {
state.processHeaderField(hf)
}
if err := state.err; err != nil {
if se, ok := err.(StreamError); ok {
t.controlBuf.put(&resetStream{s.id, statusCodeConvTab[se.Code]})
if err := state.processHeaderField(hf); err != nil {
if se, ok := err.(StreamError); ok {
t.controlBuf.put(&resetStream{s.id, statusCodeConvTab[se.Code]})
}
return
}
return
}
if frame.StreamEnded() {
@@ -205,7 +261,7 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
s.ctx = newContextWithStream(s.ctx, s)
// Attach the received metadata to the context.
if len(state.mdata) > 0 {
s.ctx = metadata.NewContext(s.ctx, state.mdata)
s.ctx = metadata.NewIncomingContext(s.ctx, state.mdata)
}
s.dec = &recvBufferReader{
@@ -245,13 +301,16 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
t.maxStreamID = s.id
s.sendQuotaPool = newQuotaPool(int(t.streamSendQuota))
t.activeStreams[s.id] = s
if len(t.activeStreams) == 1 {
t.idle = time.Time{}
}
t.mu.Unlock()
s.windowHandler = func(n int) {
t.updateWindow(s, uint32(n))
}
s.ctx = traceCtx(s.ctx, s.method)
if stats.On() {
s.ctx = stats.TagRPC(s.ctx, &stats.RPCTagInfo{FullMethodName: s.method})
if t.stats != nil {
s.ctx = t.stats.TagRPC(s.ctx, &stats.RPCTagInfo{FullMethodName: s.method})
inHeader := &stats.InHeader{
FullMethod: s.method,
RemoteAddr: t.remoteAddr,
@@ -259,7 +318,7 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
Compression: s.recvCompress,
WireLength: int(frame.Header().Length),
}
stats.HandleRPC(s.ctx, inHeader)
t.stats.HandleRPC(s.ctx, inHeader)
}
handle(s)
return
@@ -292,6 +351,7 @@ func (t *http2Server) HandleStreams(handle func(*Stream), traceCtx func(context.
t.Close()
return
}
atomic.StoreUint32(&t.activity, 1)
sf, ok := frame.(*http2.SettingsFrame)
if !ok {
grpclog.Printf("transport: http2Server.HandleStreams saw invalid preface type %T from client", frame)
@@ -302,6 +362,7 @@ func (t *http2Server) HandleStreams(handle func(*Stream), traceCtx func(context.
for {
frame, err := t.framer.readFrame()
atomic.StoreUint32(&t.activity, 1)
if err != nil {
if se, ok := err.(http2.StreamError); ok {
t.mu.Lock()
@@ -378,7 +439,7 @@ func (t *http2Server) updateWindow(s *Stream, n uint32) {
}
func (t *http2Server) handleData(f *http2.DataFrame) {
size := len(f.Data())
size := f.Header().Length
if err := t.fc.onData(uint32(size)); err != nil {
grpclog.Printf("transport: http2Server %v", err)
t.Close()
@@ -393,6 +454,11 @@ func (t *http2Server) handleData(f *http2.DataFrame) {
return
}
if size > 0 {
if f.Header().Flags.Has(http2.FlagDataPadded) {
if w := t.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
t.controlBuf.put(&windowUpdate{0, w})
}
}
s.mu.Lock()
if s.state == streamDone {
s.mu.Unlock()
@@ -408,13 +474,20 @@ func (t *http2Server) handleData(f *http2.DataFrame) {
t.controlBuf.put(&resetStream{s.id, http2.ErrCodeFlowControl})
return
}
if f.Header().Flags.Has(http2.FlagDataPadded) {
if w := s.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
t.controlBuf.put(&windowUpdate{s.id, w})
}
}
s.mu.Unlock()
// TODO(bradfitz, zhaoq): A copy is required here because there is no
// guarantee f.Data() is consumed before the arrival of next frame.
// Can this copy be eliminated?
data := make([]byte, size)
copy(data, f.Data())
s.write(recvMsg{data: data})
if len(f.Data()) > 0 {
data := make([]byte, len(f.Data()))
copy(data, f.Data())
s.write(recvMsg{data: data})
}
}
if f.Header().Flags.Has(http2.FlagDataEndStream) {
// Received the end of stream from the client.
@@ -448,6 +521,11 @@ func (t *http2Server) handleSettings(f *http2.SettingsFrame) {
t.controlBuf.put(&settings{ack: true, ss: ss})
}
const (
maxPingStrikes = 2
defaultPingTimeout = 2 * time.Hour
)
func (t *http2Server) handlePing(f *http2.PingFrame) {
if f.IsAck() { // Do nothing.
return
@@ -455,6 +533,38 @@ func (t *http2Server) handlePing(f *http2.PingFrame) {
pingAck := &ping{ack: true}
copy(pingAck.data[:], f.Data[:])
t.controlBuf.put(pingAck)
now := time.Now()
defer func() {
t.lastPingAt = now
}()
// A reset ping strikes means that we don't need to check for policy
// violation for this ping and the pingStrikes counter should be set
// to 0.
if atomic.CompareAndSwapUint32(&t.resetPingStrikes, 1, 0) {
t.pingStrikes = 0
return
}
t.mu.Lock()
ns := len(t.activeStreams)
t.mu.Unlock()
if ns < 1 && !t.kep.PermitWithoutStream {
// Keepalive shouldn't be active thus, this new ping should
// have come after atleast defaultPingTimeout.
if t.lastPingAt.Add(defaultPingTimeout).After(now) {
t.pingStrikes++
}
} else {
// Check if keepalive policy is respected.
if t.lastPingAt.Add(t.kep.MinTime).After(now) {
t.pingStrikes++
}
}
if t.pingStrikes > maxPingStrikes {
// Send goaway and close the connection.
t.controlBuf.put(&goAway{code: http2.ErrCodeEnhanceYourCalm, debugData: []byte("too_many_pings")})
}
}
func (t *http2Server) handleWindowUpdate(f *http2.WindowUpdateFrame) {
@@ -473,6 +583,13 @@ func (t *http2Server) writeHeaders(s *Stream, b *bytes.Buffer, endStream bool) e
first := true
endHeaders := false
var err error
defer func() {
if err == nil {
// Reset ping strikes when seding headers since that might cause the
// peer to send ping.
atomic.StoreUint32(&t.resetPingStrikes, 1)
}
}()
// Sends the headers in a single batch.
for !endHeaders {
size := t.hBuf.Len()
@@ -527,24 +644,24 @@ func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
if s.sendCompress != "" {
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: s.sendCompress})
}
for k, v := range md {
for k, vv := range md {
if isReservedHeader(k) {
// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
continue
}
for _, entry := range v {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry})
for _, v := range vv {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
bufLen := t.hBuf.Len()
if err := t.writeHeaders(s, t.hBuf, false); err != nil {
return err
}
if stats.On() {
if t.stats != nil {
outHeader := &stats.OutHeader{
WireLength: bufLen,
}
stats.HandleRPC(s.Context(), outHeader)
t.stats.HandleRPC(s.Context(), outHeader)
}
t.writableChan <- 0
return nil
@@ -554,7 +671,7 @@ func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
// There is no further I/O operations being able to perform on this stream.
// TODO(zhaoq): Now it indicates the end of entire stream. Revisit if early
// OK is adopted.
func (t *http2Server) WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error {
func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
var headersSent, hasHeader bool
s.mu.Lock()
if s.state == streamDone {
@@ -585,17 +702,28 @@ func (t *http2Server) WriteStatus(s *Stream, statusCode codes.Code, statusDesc s
t.hEnc.WriteField(
hpack.HeaderField{
Name: "grpc-status",
Value: strconv.Itoa(int(statusCode)),
Value: strconv.Itoa(int(st.Code())),
})
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(statusDesc)})
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(st.Message())})
if p := st.Proto(); p != nil && len(p.Details) > 0 {
stBytes, err := proto.Marshal(p)
if err != nil {
// TODO: return error instead, when callers are able to handle it.
panic(err)
}
t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-status-details-bin", Value: encodeBinHeader(stBytes)})
}
// Attach the trailer metadata.
for k, v := range s.trailer {
for k, vv := range s.trailer {
// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
if isReservedHeader(k) {
continue
}
for _, entry := range v {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry})
for _, v := range vv {
t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
}
}
bufLen := t.hBuf.Len()
@@ -603,11 +731,11 @@ func (t *http2Server) WriteStatus(s *Stream, statusCode codes.Code, statusDesc s
t.Close()
return err
}
if stats.On() {
if t.stats != nil {
outTrailer := &stats.OutTrailer{
WireLength: bufLen,
}
stats.HandleRPC(s.Context(), outTrailer)
t.stats.HandleRPC(s.Context(), outTrailer)
}
t.closeStream(s)
t.writableChan <- 0
@@ -616,7 +744,7 @@ func (t *http2Server) WriteStatus(s *Stream, statusCode codes.Code, statusDesc s
// Write converts the data into HTTP2 data frame and sends it out. Non-nil error
// is returns if it fails (e.g., framing error, transport error).
func (t *http2Server) Write(s *Stream, data []byte, opts *Options) error {
func (t *http2Server) Write(s *Stream, data []byte, opts *Options) (err error) {
// TODO(zhaoq): Support multi-writers for a single stream.
var writeHeaderFrame bool
s.mu.Lock()
@@ -631,6 +759,13 @@ func (t *http2Server) Write(s *Stream, data []byte, opts *Options) error {
if writeHeaderFrame {
t.WriteHeader(s, nil)
}
defer func() {
if err == nil {
// Reset ping strikes when sending data since this might cause
// the peer to send ping.
atomic.StoreUint32(&t.resetPingStrikes, 1)
}
}()
r := bytes.NewBuffer(data)
for {
if r.Len() == 0 {
@@ -720,6 +855,91 @@ func (t *http2Server) applySettings(ss []http2.Setting) {
}
}
// keepalive running in a separate goroutine does the following:
// 1. Gracefully closes an idle connection after a duration of keepalive.MaxConnectionIdle.
// 2. Gracefully closes any connection after a duration of keepalive.MaxConnectionAge.
// 3. Forcibly closes a connection after an additive period of keepalive.MaxConnectionAgeGrace over keepalive.MaxConnectionAge.
// 4. Makes sure a connection is alive by sending pings with a frequency of keepalive.Time and closes a non-resposive connection
// after an additional duration of keepalive.Timeout.
func (t *http2Server) keepalive() {
p := &ping{}
var pingSent bool
maxIdle := time.NewTimer(t.kp.MaxConnectionIdle)
maxAge := time.NewTimer(t.kp.MaxConnectionAge)
keepalive := time.NewTimer(t.kp.Time)
// NOTE: All exit paths of this function should reset their
// respecitve timers. A failure to do so will cause the
// following clean-up to deadlock and eventually leak.
defer func() {
if !maxIdle.Stop() {
<-maxIdle.C
}
if !maxAge.Stop() {
<-maxAge.C
}
if !keepalive.Stop() {
<-keepalive.C
}
}()
for {
select {
case <-maxIdle.C:
t.mu.Lock()
idle := t.idle
if idle.IsZero() { // The connection is non-idle.
t.mu.Unlock()
maxIdle.Reset(t.kp.MaxConnectionIdle)
continue
}
val := t.kp.MaxConnectionIdle - time.Since(idle)
if val <= 0 {
// The connection has been idle for a duration of keepalive.MaxConnectionIdle or more.
// Gracefully close the connection.
t.state = draining
t.mu.Unlock()
t.Drain()
// Reseting the timer so that the clean-up doesn't deadlock.
maxIdle.Reset(infinity)
return
}
t.mu.Unlock()
maxIdle.Reset(val)
case <-maxAge.C:
t.mu.Lock()
t.state = draining
t.mu.Unlock()
t.Drain()
maxAge.Reset(t.kp.MaxConnectionAgeGrace)
select {
case <-maxAge.C:
// Close the connection after grace period.
t.Close()
// Reseting the timer so that the clean-up doesn't deadlock.
maxAge.Reset(infinity)
case <-t.shutdownChan:
}
return
case <-keepalive.C:
if atomic.CompareAndSwapUint32(&t.activity, 1, 0) {
pingSent = false
keepalive.Reset(t.kp.Time)
continue
}
if pingSent {
t.Close()
// Reseting the timer so that the clean-up doesn't deadlock.
keepalive.Reset(infinity)
return
}
pingSent = true
t.controlBuf.put(p)
keepalive.Reset(t.kp.Timeout)
case <-t.shutdownChan:
return
}
}
}
// controller running in a separate goroutine takes charge of sending control
// frames (e.g., window update, reset stream, setting, etc.) to the server.
func (t *http2Server) controller() {
@@ -751,7 +971,10 @@ func (t *http2Server) controller() {
sid := t.maxStreamID
t.state = draining
t.mu.Unlock()
t.framer.writeGoAway(true, sid, http2.ErrCodeNo, nil)
t.framer.writeGoAway(true, sid, i.code, i.debugData)
if i.code == http2.ErrCodeEnhanceYourCalm {
t.Close()
}
case *flushIO:
t.framer.flushWrite()
case *ping:
@@ -789,9 +1012,9 @@ func (t *http2Server) Close() (err error) {
for _, s := range streams {
s.cancel()
}
if stats.On() {
if t.stats != nil {
connEnd := &stats.ConnEnd{}
stats.HandleConn(t.ctx, connEnd)
t.stats.HandleConn(t.ctx, connEnd)
}
return
}
@@ -801,6 +1024,9 @@ func (t *http2Server) Close() (err error) {
func (t *http2Server) closeStream(s *Stream) {
t.mu.Lock()
delete(t.activeStreams, s.id)
if len(t.activeStreams) == 0 {
t.idle = time.Now()
}
if t.state == draining && len(t.activeStreams) == 0 {
defer t.Close()
}
@@ -828,5 +1054,17 @@ func (t *http2Server) RemoteAddr() net.Addr {
}
func (t *http2Server) Drain() {
t.controlBuf.put(&goAway{})
t.controlBuf.put(&goAway{code: http2.ErrCodeNo})
}
var rgen = rand.New(rand.NewSource(time.Now().UnixNano()))
func getJitter(v time.Duration) time.Duration {
if v == infinity {
return 0
}
// Generate a jitter between +/- 10% of the value.
r := int64(v / 10)
j := rgen.Int63n(2*r) - r
return time.Duration(j)
}

112
vendor/google.golang.org/grpc/transport/http_util.go generated vendored
View File

@@ -36,6 +36,7 @@ package transport
import (
"bufio"
"bytes"
"encoding/base64"
"fmt"
"io"
"net"
@@ -44,16 +45,16 @@ import (
"sync/atomic"
"time"
"github.com/golang/protobuf/proto"
"golang.org/x/net/http2"
"golang.org/x/net/http2/hpack"
spb "google.golang.org/genproto/googleapis/rpc/status"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
)
const (
// The primary user agent
primaryUA = "grpc-go/1.0"
// http2MaxFrameLen specifies the max length of a HTTP2 frame.
http2MaxFrameLen = 16384 // 16KB frame
// http://http2.github.io/http2-spec/#SettingValues
@@ -92,13 +93,15 @@ var (
// Records the states during HPACK decoding. Must be reset once the
// decoding of the entire headers are finished.
type decodeState struct {
err error // first error encountered decoding
encoding string
// statusCode caches the stream status received from the trailer
// the server sent. Client side only.
statusCode codes.Code
statusDesc string
// statusGen caches the stream status received from the trailer the server
// sent. Client side only. Do not access directly. After all trailers are
// parsed, use the status method to retrieve the status.
statusGen *status.Status
// rawStatusCode and rawStatusMsg are set from the raw trailer fields and are not
// intended for direct access outside of parsing.
rawStatusCode int32
rawStatusMsg string
// Server side only fields.
timeoutSet bool
timeout time.Duration
@@ -121,6 +124,7 @@ func isReservedHeader(hdr string) bool {
"grpc-message",
"grpc-status",
"grpc-timeout",
"grpc-status-details-bin",
"te":
return true
default:
@@ -139,12 +143,6 @@ func isWhitelistedPseudoHeader(hdr string) bool {
}
}
func (d *decodeState) setErr(err error) {
if d.err == nil {
d.err = err
}
}
func validContentType(t string) bool {
e := "application/grpc"
if !strings.HasPrefix(t, e) {
@@ -158,56 +156,91 @@ func validContentType(t string) bool {
return true
}
func (d *decodeState) processHeaderField(f hpack.HeaderField) {
func (d *decodeState) status() *status.Status {
if d.statusGen == nil {
// No status-details were provided; generate status using code/msg.
d.statusGen = status.New(codes.Code(d.rawStatusCode), d.rawStatusMsg)
}
return d.statusGen
}
const binHdrSuffix = "-bin"
func encodeBinHeader(v []byte) string {
return base64.RawStdEncoding.EncodeToString(v)
}
func decodeBinHeader(v string) ([]byte, error) {
if len(v)%4 == 0 {
// Input was padded, or padding was not necessary.
return base64.StdEncoding.DecodeString(v)
}
return base64.RawStdEncoding.DecodeString(v)
}
func encodeMetadataHeader(k, v string) string {
if strings.HasSuffix(k, binHdrSuffix) {
return encodeBinHeader(([]byte)(v))
}
return v
}
func decodeMetadataHeader(k, v string) (string, error) {
if strings.HasSuffix(k, binHdrSuffix) {
b, err := decodeBinHeader(v)
return string(b), err
}
return v, nil
}
func (d *decodeState) processHeaderField(f hpack.HeaderField) error {
switch f.Name {
case "content-type":
if !validContentType(f.Value) {
d.setErr(streamErrorf(codes.FailedPrecondition, "transport: received the unexpected content-type %q", f.Value))
return
return streamErrorf(codes.FailedPrecondition, "transport: received the unexpected content-type %q", f.Value)
}
case "grpc-encoding":
d.encoding = f.Value
case "grpc-status":
code, err := strconv.Atoi(f.Value)
if err != nil {
d.setErr(streamErrorf(codes.Internal, "transport: malformed grpc-status: %v", err))
return
return streamErrorf(codes.Internal, "transport: malformed grpc-status: %v", err)
}
d.statusCode = codes.Code(code)
d.rawStatusCode = int32(code)
case "grpc-message":
d.statusDesc = decodeGrpcMessage(f.Value)
d.rawStatusMsg = decodeGrpcMessage(f.Value)
case "grpc-status-details-bin":
v, err := decodeBinHeader(f.Value)
if err != nil {
return streamErrorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
}
s := &spb.Status{}
if err := proto.Unmarshal(v, s); err != nil {
return streamErrorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
}
d.statusGen = status.FromProto(s)
case "grpc-timeout":
d.timeoutSet = true
var err error
d.timeout, err = decodeTimeout(f.Value)
if err != nil {
d.setErr(streamErrorf(codes.Internal, "transport: malformed time-out: %v", err))
return
if d.timeout, err = decodeTimeout(f.Value); err != nil {
return streamErrorf(codes.Internal, "transport: malformed time-out: %v", err)
}
case ":path":
d.method = f.Value
default:
if !isReservedHeader(f.Name) || isWhitelistedPseudoHeader(f.Name) {
if f.Name == "user-agent" {
i := strings.LastIndex(f.Value, " ")
if i == -1 {
// There is no application user agent string being set.
return
}
// Extract the application user agent string.
f.Value = f.Value[:i]
}
if d.mdata == nil {
d.mdata = make(map[string][]string)
}
k, v, err := metadata.DecodeKeyValue(f.Name, f.Value)
v, err := decodeMetadataHeader(f.Name, f.Value)
if err != nil {
grpclog.Printf("Failed to decode (%q, %q): %v", f.Name, f.Value, err)
return
return nil
}
d.mdata[k] = append(d.mdata[k], v)
d.mdata[f.Name] = append(d.mdata[f.Name], v)
}
}
return nil
}
type timeoutUnit uint8
@@ -379,6 +412,9 @@ func newFramer(conn net.Conn) *framer {
writer: bufio.NewWriterSize(conn, http2IOBufSize),
}
f.fr = http2.NewFramer(f.writer, f.reader)
// Opt-in to Frame reuse API on framer to reduce garbage.
// Frames aren't safe to read from after a subsequent call to ReadFrame.
f.fr.SetReuseFrames()
f.fr.ReadMetaHeaders = hpack.NewDecoder(http2InitHeaderTableSize, nil)
return f
}

100
vendor/google.golang.org/grpc/transport/transport.go generated vendored
View File

@@ -45,9 +45,13 @@ import (
"sync"
"golang.org/x/net/context"
"golang.org/x/net/http2"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/keepalive"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
"google.golang.org/grpc/tap"
)
@@ -209,9 +213,17 @@ type Stream struct {
// true iff headerChan is closed. Used to avoid closing headerChan
// multiple times.
headerDone bool
// the status received from the server.
statusCode codes.Code
statusDesc string
// the status error received from the server.
status *status.Status
// rstStream indicates whether a RST_STREAM frame needs to be sent
// to the server to signify that this stream is closing.
rstStream bool
// rstError is the error that needs to be sent along with the RST_STREAM frame.
rstError http2.ErrCode
// bytesSent and bytesReceived indicates whether any bytes have been sent or
// received on this stream.
bytesSent bool
bytesReceived bool
}
// RecvCompress returns the compression algorithm applied to the inbound
@@ -276,14 +288,9 @@ func (s *Stream) Method() string {
return s.method
}
// StatusCode returns statusCode received from the server.
func (s *Stream) StatusCode() codes.Code {
return s.statusCode
}
// StatusDesc returns statusDesc received from the server.
func (s *Stream) StatusDesc() string {
return s.statusDesc
// Status returns the status received from the server.
func (s *Stream) Status() *status.Status {
return s.status
}
// SetHeader sets the header metadata. This can be called multiple times.
@@ -330,6 +337,34 @@ func (s *Stream) Read(p []byte) (n int, err error) {
return
}
// finish sets the stream's state and status, and closes the done channel.
// s.mu must be held by the caller. st must always be non-nil.
func (s *Stream) finish(st *status.Status) {
s.status = st
s.state = streamDone
close(s.done)
}
// BytesSent indicates whether any bytes have been sent on this stream.
func (s *Stream) BytesSent() bool {
s.mu.Lock()
defer s.mu.Unlock()
return s.bytesSent
}
// BytesReceived indicates whether any bytes have been received on this stream.
func (s *Stream) BytesReceived() bool {
s.mu.Lock()
defer s.mu.Unlock()
return s.bytesReceived
}
// GoString is implemented by Stream so context.String() won't
// race when printing %#v.
func (s *Stream) GoString() string {
return fmt.Sprintf("<stream: %p, %v>", s, s.method)
}
// The key to save transport.Stream in the context.
type streamKey struct{}
@@ -357,9 +392,12 @@ const (
// ServerConfig consists of all the configurations to establish a server transport.
type ServerConfig struct {
MaxStreams uint32
AuthInfo credentials.AuthInfo
InTapHandle tap.ServerInHandle
MaxStreams uint32
AuthInfo credentials.AuthInfo
InTapHandle tap.ServerInHandle
StatsHandler stats.Handler
KeepaliveParams keepalive.ServerParameters
KeepalivePolicy keepalive.EnforcementPolicy
}
// NewServerTransport creates a ServerTransport with conn or non-nil error
@@ -372,6 +410,9 @@ func NewServerTransport(protocol string, conn net.Conn, config *ServerConfig) (S
type ConnectOptions struct {
// UserAgent is the application user agent.
UserAgent string
// Authority is the :authority pseudo-header to use. This field has no effect if
// TransportCredentials is set.
Authority string
// Dialer specifies how to dial a network address.
Dialer func(context.Context, string) (net.Conn, error)
// FailOnNonTempDialError specifies if gRPC fails on non-temporary dial errors.
@@ -380,6 +421,10 @@ type ConnectOptions struct {
PerRPCCredentials []credentials.PerRPCCredentials
// TransportCredentials stores the Authenticator required to setup a client connection.
TransportCredentials credentials.TransportCredentials
// KeepaliveParams stores the keepalive parameters.
KeepaliveParams keepalive.ClientParameters
// StatsHandler stores the handler for stats.
StatsHandler stats.Handler
}
// TargetInfo contains the information of the target such as network address and metadata.
@@ -466,6 +511,9 @@ type ClientTransport interface {
// receives the draining signal from the server (e.g., GOAWAY frame in
// HTTP/2).
GoAway() <-chan struct{}
// GetGoAwayReason returns the reason why GoAway frame was received.
GetGoAwayReason() GoAwayReason
}
// ServerTransport is the common interface for all gRPC server-side transport
@@ -485,10 +533,9 @@ type ServerTransport interface {
// Write may not be called on all streams.
Write(s *Stream, data []byte, opts *Options) error
// WriteStatus sends the status of a stream to the client.
// WriteStatus is the final call made on a stream and always
// occurs.
WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error
// WriteStatus sends the status of a stream to the client. WriteStatus is
// the final call made on a stream and always occurs.
WriteStatus(s *Stream, st *status.Status) error
// Close tears down the transport. Once it is called, the transport
// should not be accessed any more. All the pending streams and their
@@ -554,6 +601,8 @@ var (
ErrStreamDrain = streamErrorf(codes.Unavailable, "the server stops accepting new RPCs")
)
// TODO: See if we can replace StreamError with status package errors.
// StreamError is an error that only affects one stream within a connection.
type StreamError struct {
Code codes.Code
@@ -561,7 +610,7 @@ type StreamError struct {
}
func (e StreamError) Error() string {
return fmt.Sprintf("stream error: code = %d desc = %q", e.Code, e.Desc)
return fmt.Sprintf("stream error: code = %s desc = %q", e.Code, e.Desc)
}
// ContextErr converts the error from context package into a StreamError.
@@ -602,3 +651,16 @@ func wait(ctx context.Context, done, goAway, closing <-chan struct{}, proceed <-
return i, nil
}
}
// GoAwayReason contains the reason for the GoAway frame received.
type GoAwayReason uint8
const (
// Invalid indicates that no GoAway frame is received.
Invalid GoAwayReason = 0
// NoReason is the default value when GoAway frame is received.
NoReason GoAwayReason = 1
// TooManyPings indicates that a GoAway frame with ErrCodeEnhanceYourCalm
// was recieved and that the debug data said "too_many_pings".
TooManyPings GoAwayReason = 2
)