[nginx] HTTP/2: prevented output of the HEADERS frame for canceled streams.

[Valentin Bartenev]

details:   http://hg.nginx.org/nginx/rev/699e409a3e0c
branches:  
changeset: 6637:699e409a3e0c
user:      Valentin Bartenev <vbart at nginx.com>
date:      Tue Jul 19 20:22:44 2016 +0300
description:
HTTP/2: prevented output of the HEADERS frame for canceled streams.

It's useless to generate HEADERS if the stream has been canceled already.

diffstat:

 src/http/v2/ngx_http_v2_filter_module.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (25 lines):

diff -r ea284434db0f -r 699e409a3e0c src/http/v2/ngx_http_v2_filter_module.c
--- a/src/http/v2/ngx_http_v2_filter_module.c	Tue Jul 19 20:22:44 2016 +0300
+++ b/src/http/v2/ngx_http_v2_filter_module.c	Tue Jul 19 20:22:44 2016 +0300
@@ -165,6 +165,12 @@ ngx_http_v2_header_filter(ngx_http_reque
         return NGX_OK;
     }
 
+    fc = r->connection;
+
+    if (fc->error) {
+        return NGX_ERROR;
+    }
+
     if (r->method == NGX_HTTP_HEAD) {
         r->header_only = 1;
     }
@@ -255,8 +261,6 @@ ngx_http_v2_header_filter(ngx_http_reque
         len += 1 + ngx_http_v2_literal_size("Wed, 31 Dec 1986 18:00:00 GMT");
     }
 
-    fc = r->connection;
-
     if (r->headers_out.location && r->headers_out.location->value.len) {
 
         if (r->headers_out.location->value.data[0] == '/') {