Function FromIncomingContext

metadata/metadata.go:197–211

FromIncomingContext returns the incoming metadata in ctx if it exists. All keys in the returned MD are lowercase.

(ctx context.Context)

//
// All keys in the returned MD are lowercase.
func FromIncomingContext(ctx context.Context) (MD, bool) {
	md, ok := ctx.Value(mdIncomingKey{}).(MD)
	if !ok {
		return nil, false
	}
	out := make(MD, len(md))
	for k, v := range md {
		// We need to manually convert all keys to lower case, because MD is a
		// map, and there's no guarantee that the MD attached to the context is
		// created using our helper functions.
		key := strings.ToLower(k)
		out[key] = copyOf(v)
	}
	return out, true
}

// ValueFromIncomingContext returns the metadata value corresponding to the metadata
// key from the incoming metadata if it exists. Keys are matched in a case insensitive