mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-30 15:50:07 +01:00
41 lines
1.2 KiB
Go
41 lines
1.2 KiB
Go
/*
|
|
*
|
|
* Copyright 2020 gRPC authors.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
*/
|
|
|
|
package grpcutil
|
|
|
|
import (
|
|
"context"
|
|
|
|
"google.golang.org/grpc/metadata"
|
|
)
|
|
|
|
type mdExtraKey struct{}
|
|
|
|
// WithExtraMetadata creates a new context with incoming md attached.
|
|
func WithExtraMetadata(ctx context.Context, md metadata.MD) context.Context {
|
|
return context.WithValue(ctx, mdExtraKey{}, md)
|
|
}
|
|
|
|
// ExtraMetadata returns the incoming metadata in ctx if it exists. The
|
|
// returned MD should not be modified. Writing to it may cause races.
|
|
// Modification should be made to copies of the returned MD.
|
|
func ExtraMetadata(ctx context.Context) (md metadata.MD, ok bool) {
|
|
md, ok = ctx.Value(mdExtraKey{}).(metadata.MD)
|
|
return
|
|
}
|