From: Valentin Bartenev <vbart@nginx.com>
Date: Tue, 19 Jul 2016 17:22:44 +0000 (+0300)
Subject: HTTP/2: prevented output of the HEADERS frame for canceled streams.
X-Git-Url: http://www.kaiwu.me/postgresql/commit/?a=commitdiff_plain;h=19de85a4d75e7eada6afb8f59ce6d5de0ec10d5c;p=nginx.git

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

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

diff --git a/src/http/v2/ngx_http_v2_filter_module.c b/src/http/v2/ngx_http_v2_filter_module.c
index 39ff10301..a53cae13f 100644
--- a/src/http/v2/ngx_http_v2_filter_module.c
+++ b/src/http/v2/ngx_http_v2_filter_module.c
@@ -165,6 +165,12 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
         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_request_t *r)
         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] == '/') {