Merge pull request #327 from iamqizhao/master

tentatively disable content-type check

transport/http_util.go

@@ -141,10 +141,13 @@ func newHPACKDecoder() *hpackDecoder {
 	d.h = hpack.NewDecoder(http2InitHeaderTableSize, func(f hpack.HeaderField) {
 		switch f.Name {
 		case "content-type":
+			// TODO(zhaoq): Tentatively disable the check until a bug is fixed.
+			/*
 			if !strings.Contains(f.Value, "application/grpc") {
 				d.err = StreamErrorf(codes.FailedPrecondition, "transport: received the unexpected header")
 				return
 			}
+			*/
 		case "grpc-status":
 			code, err := strconv.Atoi(f.Value)
 			if err != nil {