Update PROTOCOL-WEB.md

Clarify the content type requirement (for message formats).
8 years ago · 0408aa85d9
parent 9ea6d79474
commit 0408aa85d9
1 changed files with 1 additions and 0 deletions
--- a/doc/PROTOCOL-WEB.md
+++ b/doc/PROTOCOL-WEB.md
@ -37,6 +37,7 @@ Content-Type

 1. application/grpc-web
  * e.g. application/grpc-web+[proto, json, thrift]
+  * the message format, e.g. +proto, +json, should always be specified by the sender
 2. application/grpc-web-text
  * text-encoded streams of “application/grpc-web”
  * e.g. application/grpc-web-text+[proto, thrift]