From ce7a5a05375dbf452a2cbe136c922f7718c15d5c Mon Sep 17 00:00:00 2001
From: Maxim Dounin <mdounin@mdounin.ru>
Date: Thu, 25 Jul 2013 14:54:48 +0400
Subject: [PATCH] Sub filter: fixed incomplete last buffer on partial match.

If a pattern was partially matched at a response end, partially matched
string wasn't send.  E.g., a response "fo" was truncated to an empty response
if partially mathed by a pattern "foo".
---
 src/http/modules/ngx_http_sub_filter_module.c | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/http/modules/ngx_http_sub_filter_module.c b/src/http/modules/ngx_http_sub_filter_module.c
index 3d32b0fbc..fcf6274cb 100644
--- a/src/http/modules/ngx_http_sub_filter_module.c
+++ b/src/http/modules/ngx_http_sub_filter_module.c
@@ -369,6 +369,26 @@ ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
             continue;
         }
 
+        if (ctx->buf->last_buf && ctx->looked.len) {
+            cl = ngx_chain_get_free_buf(r->pool, &ctx->free);
+            if (cl == NULL) {
+                return NGX_ERROR;
+            }
+
+            b = cl->buf;
+
+            ngx_memzero(b, sizeof(ngx_buf_t));
+
+            b->pos = ctx->looked.data;
+            b->last = b->pos + ctx->looked.len;
+            b->memory = 1;
+
+            *ctx->last_out = cl;
+            ctx->last_out = &cl->next;
+
+            ctx->looked.len = 0;
+        }
+
         if (ctx->buf->last_buf || ctx->buf->flush
             || ngx_buf_in_memory(ctx->buf))
         {