From: Igor Sysoev <igor@sysoev.ru>
Date: Mon, 1 Oct 2007 16:24:15 +0000 (+0000)
Subject: fix empty string replacement in sub_filter
X-Git-Tag: release-0.6.14~14
X-Git-Url: http://git.kaiwu.me/%7B@url%7D?a=commitdiff_plain;h=d13045f16cb8ad94f666c3a704c552cd3ae13492;p=nginx.git

fix empty string replacement in sub_filter
---

diff --git a/src/http/modules/ngx_http_sub_filter_module.c b/src/http/modules/ngx_http_sub_filter_module.c
index d196c1966..a9fe8d407 100644
--- a/src/http/modules/ngx_http_sub_filter_module.c
+++ b/src/http/modules/ngx_http_sub_filter_module.c
@@ -369,9 +369,14 @@ ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
                 }
             }
 
-            b->memory = 1;
-            b->pos = ctx->sub.data;
-            b->last = ctx->sub.data + ctx->sub.len;
+            if (ctx->sub.len) {
+                b->memory = 1;
+                b->pos = ctx->sub.data;
+                b->last = ctx->sub.data + ctx->sub.len;
+
+            } else {
+                b->sync = 1;
+            }
 
             cl->buf = b;
             cl->next = NULL;