bbe14f0a2e
Since Go 1.7, context is a standard package, superceding the
"x/net/context". Since Go 1.9, the latter only provides a few type
aliases from the former. Therefore, it makes sense to switch to the
standard package.
This commit was generated by the following script (with a couple of
minor fixups to remove extra changes done by goimports):
#!/bin/bash
if [ $# -ge 1 ]; then
FILES=$*
else
FILES=$(git ls-files \*.go | grep -vF ".pb.go" | grep -v
^vendor/)
fi
for f in $FILES; do
printf .
sed -i -e 's|"golang.org/x/net/context"$|"context"|' $f
goimports -w $f
awk ' /^$/ {e=1; next;}
/[[:space:]]"context"$/ {e=0;}
{if (e) {print ""; e=0}; print;}' < $f > $f.new && \
mv $f.new $f
goimports -w $f
done
echo
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
62 lines
1.7 KiB
Go
62 lines
1.7 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package namespaces
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import (
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"context"
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"google.golang.org/grpc/metadata"
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)
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const (
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// GRPCHeader defines the header name for specifying a containerd namespace.
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GRPCHeader = "containerd-namespace"
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)
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// NOTE(stevvooe): We can stub this file out if we don't want a grpc dependency here.
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func withGRPCNamespaceHeader(ctx context.Context, namespace string) context.Context {
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// also store on the grpc headers so it gets picked up by any clients that
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// are using this.
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nsheader := metadata.Pairs(GRPCHeader, namespace)
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md, ok := metadata.FromOutgoingContext(ctx) // merge with outgoing context.
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if !ok {
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md = nsheader
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} else {
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// order ensures the latest is first in this list.
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md = metadata.Join(nsheader, md)
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}
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return metadata.NewOutgoingContext(ctx, md)
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}
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func fromGRPCHeader(ctx context.Context) (string, bool) {
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// try to extract for use in grpc servers.
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md, ok := metadata.FromIncomingContext(ctx)
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if !ok {
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// TODO(stevvooe): Check outgoing context?
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return "", false
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}
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values := md[GRPCHeader]
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if len(values) == 0 {
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return "", false
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}
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return values[0], true
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}
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