Add MetadataHostName const

open-telemetry · Jan 25, 2022 · 7825619 · 7825619
1 parent ddcc649
commit 7825619
Show file tree

Hide file tree

Showing 3 changed files with 6 additions and 4 deletions.
diff --git a/client/client.go b/client/client.go
@@ -131,6 +131,8 @@ type AuthData interface {
 	GetAttributeNames() []string
 }
 
+const MetadataHostName = "Host"
+
 // NewContext takes an existing context and derives a new context with the
 // client.Info value stored on it.
 func NewContext(ctx context.Context, c Info) context.Context {

diff --git a/config/configgrpc/configgrpc.go b/config/configgrpc/configgrpc.go
@@ -401,8 +401,8 @@ func contextWithClient(ctx context.Context, includeMetadata bool) context.Contex
 	if includeMetadata {
 		if md, ok := metadata.FromIncomingContext(ctx); ok {
 			copiedMD := md.Copy()
-			if len(md["Host"]) == 0 && len(md[":authority"]) > 0 {
-				copiedMD["Host"] = md[":authority"]
+			if len(md[client.MetadataHostName]) == 0 && len(md[":authority"]) > 0 {
+				copiedMD[client.MetadataHostName] = md[":authority"]
 			}
 			cl.Metadata = client.NewMetadata(copiedMD)
 		}

diff --git a/config/confighttp/clientinfohandler.go b/config/confighttp/clientinfohandler.go
@@ -51,8 +51,8 @@ func contextWithClient(req *http.Request, includeMetadata bool) context.Context
 
 	if includeMetadata {
 		md := req.Header.Clone()
-		if len(md.Get("Host")) == 0 && req.Host != "" {
-			md.Add("Host", req.Host)
+		if len(md.Get(client.MetadataHostName)) == 0 && req.Host != "" {
+			md.Add(client.MetadataHostName, req.Host)
 		}
 
 		cl.Metadata = client.NewMetadata(md)