containerd/cmd/ctr/commands/resolver.go
Jess Valarezo 16855eedf7 ctr: move resolver to commands package
Signed-off-by: Jess Valarezo <valarezo.jessica@gmail.com>
2017-10-26 16:31:58 -04:00

93 lines
2.1 KiB
Go

package commands
import (
"bufio"
gocontext "context"
"crypto/tls"
"fmt"
"net"
"net/http"
"strings"
"time"
"github.com/containerd/console"
"github.com/containerd/containerd/remotes"
"github.com/containerd/containerd/remotes/docker"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
// PushTracker returns a new InMemoryTracker which tracks the ref status
var PushTracker = docker.NewInMemoryTracker()
func passwordPrompt() (string, error) {
c := console.Current()
defer c.Reset()
if err := c.DisableEcho(); err != nil {
return "", errors.Wrap(err, "failed to disable echo")
}
line, _, err := bufio.NewReader(c).ReadLine()
if err != nil {
return "", errors.Wrap(err, "failed to read line")
}
return string(line), nil
}
// GetResolver prepares the resolver from the environment and options
func GetResolver(ctx gocontext.Context, clicontext *cli.Context) (remotes.Resolver, error) {
username := clicontext.String("user")
var secret string
if i := strings.IndexByte(username, ':'); i > 0 {
secret = username[i+1:]
username = username[0:i]
}
options := docker.ResolverOptions{
PlainHTTP: clicontext.Bool("plain-http"),
Tracker: PushTracker,
}
if username != "" {
if secret == "" {
fmt.Printf("Password: ")
var err error
secret, err = passwordPrompt()
if err != nil {
return nil, err
}
fmt.Print("\n")
}
} else if rt := clicontext.String("refresh"); rt != "" {
secret = rt
}
options.Credentials = func(host string) (string, string, error) {
// Only one host
return username, secret, nil
}
tr := &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
DualStack: true,
}).DialContext,
MaxIdleConns: 10,
IdleConnTimeout: 30 * time.Second,
TLSHandshakeTimeout: 10 * time.Second,
TLSClientConfig: &tls.Config{
InsecureSkipVerify: clicontext.Bool("insecure"),
},
ExpectContinueTimeout: 5 * time.Second,
}
options.Client = &http.Client{
Transport: tr,
}
return docker.NewResolver(options), nil
}