From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Fri, 14 Nov 2014 15:38:29 +0000 (+0900)
Subject: http2: Don't send Upgrade headers when we already do HTTP/2
X-Git-Tag: curl-7_40_0~364
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ed77fdf389cb5a45bc7465a6d08955c7edd3a6cd;p=curl

http2: Don't send Upgrade headers when we already do HTTP/2
---

diff --git a/lib/http.c b/lib/http.c
index 9083337c3..76af6f702 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -2276,6 +2276,7 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
     return result;
 
   if(!(conn->handler->flags&PROTOPT_SSL) &&
+     conn->httpversion != 20 &&
      (data->set.httpversion == CURL_HTTP_VERSION_2_0)) {
     /* append HTTP2 upgrade magic stuff to the HTTP request if it isn't done
        over SSL */