Rename isGrpcContentType to validContentType

transport/handler_server.go

@@ -65,7 +65,7 @@ func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request) (ServerTr
 	if r.Method != "POST" {
 		return nil, errors.New("invalid gRPC request method")
 	}
-	if !isGrpcContentType(r.Header.Get("Content-Type")) {
+	if !validContentType(r.Header.Get("Content-Type")) {
 		return nil, errors.New("invalid gRPC request content-type")
 	}
 	if _, ok := w.(http.Flusher); !ok {

transport/http_util.go

@@ -144,7 +144,7 @@ func (d *decodeState) setErr(err error) {
 	}
 }
 
-func isGrpcContentType(t string) bool {
+func validContentType(t string) bool {
 	e := "application/grpc"
 	if !strings.HasPrefix(t, e) {
 		return false
@@ -160,7 +160,7 @@ func isGrpcContentType(t string) bool {
 func (d *decodeState) processHeaderField(f hpack.HeaderField) {
 	switch f.Name {
 	case "content-type":
-		if !isGrpcContentType(f.Value) {
+		if !validContentType(f.Value) {
 			d.setErr(StreamErrorf(codes.FailedPrecondition, "transport: received the unexpected content-type %q", f.Value))
 			return
 		}

transport/http_util_test.go

@@ -86,7 +86,7 @@ func TestTimeoutDecode(t *testing.T) {
 	}
 }
 
-func TestIsGrpcContentType(t *testing.T) {
+func TestValidContentType(t *testing.T) {
 	tests := []struct {
 		h    string
 		want bool
@@ -101,9 +101,9 @@ func TestIsGrpcContentType(t *testing.T) {
 		{"application/grp", false},
 	}
 	for _, tt := range tests {
-		got := isGrpcContentType(tt.h)
+		got := validContentType(tt.h)
 		if got != tt.want {
-			t.Errorf("isGrpcContentType(%q) = %v; want %v", tt.h, got, tt.want)
+			t.Errorf("validContentType(%q) = %v; want %v", tt.h, got, tt.want)
 		}
 	}
 }