From f9ca15406613ec9b516acf30a814f2bba260ae11 Mon Sep 17 00:00:00 2001
From: Wenbo Zhu <wenboz@google.com>
Date: Fri, 19 May 2017 10:33:06 -0700
Subject: [PATCH] Update PROTOCOL-WEB.md

---
 doc/PROTOCOL-WEB.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/PROTOCOL-WEB.md b/doc/PROTOCOL-WEB.md
index 3fe6deb14f..b6ea3ecabe 100644
--- a/doc/PROTOCOL-WEB.md
+++ b/doc/PROTOCOL-WEB.md
@@ -37,7 +37,8 @@ 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
+  * the sender should always specifiy the message format, e.g. +proto, +json
+  * the receiver should assume the default is "+proto" when the message format is mssing in the C-T, i.e. "application/grpc-web"
 2. application/grpc-web-text
   * text-encoded streams of “application/grpc-web”
   * e.g. application/grpc-web-text+[proto, thrift]
-- 
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