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add metadata.Get(context, key) as short hand

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This commit is contained in:
Asim Aslam 2019-11-11 09:13:02 +00:00
parent 5ffe367cae
commit 65b1283459
1 changed files with 10 additions and 0 deletions
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10
metadata/metadata.go
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@ -21,6 +21,16 @@ func Copy(md Metadata) Metadata {
return cmd return cmd
} }
// Get returns a single value from metadata in the context
func Get(ctx context.Context, key string) (string, bool) {
md, ok := FromContext(ctx)
if !ok {
return "", ok
}
val, ok := md[key]
return val, ok
}
// FromContext returns metadata from the given context // FromContext returns metadata from the given context
func FromContext(ctx context.Context) (Metadata, bool) { func FromContext(ctx context.Context) (Metadata, bool) {
md, ok := ctx.Value(metaKey{}).(Metadata) md, ok := ctx.Value(metaKey{}).(Metadata)