# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1383178580 -14400
# Node ID 6aa75f4982cece340f40b9f78a1eab0b44a7238a
# Parent  2bb2571d6e3420bfa8b7a7fa277778ace9647d56
Gunzip: proper error handling on gunzipping an empty response.

With previous code, an empty (malformed) response resulted in a request
finalized without sending anything to a client.

diff --git a/src/http/modules/ngx_http_gunzip_filter_module.c b/src/http/modules/ngx_http_gunzip_filter_module.c
--- a/src/http/modules/ngx_http_gunzip_filter_module.c
+++ b/src/http/modules/ngx_http_gunzip_filter_module.c
@@ -500,9 +500,13 @@ ngx_http_gunzip_filter_inflate(ngx_http_
         return NGX_OK;
     }
 
-    if (rc == Z_STREAM_END && ctx->flush == Z_FINISH
-        && ctx->zstream.avail_in == 0)
-    {
+    if (ctx->flush == Z_FINISH && ctx->zstream.avail_in == 0) {
+
+        if (rc != Z_STREAM_END) {
+            ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                          "inflate() returned %d on response end", rc);
+            return NGX_ERROR;
+        }
 
         if (ngx_http_gunzip_filter_inflate_end(r, ctx) != NGX_OK) {
             return NGX_ERROR;