From 1631393f9427892f108d2c6549a568ee1e5ed6bc Mon Sep 17 00:00:00 2001
From: Maxim Dounin <mdounin@mdounin.ru>
Date: Tue, 28 Jan 2014 15:40:45 +0400
Subject: [PATCH] SSI: fixed $date_local and $date_gmt without SSI (ticket
 #230).

If there is no SSI context in a given request at a given time,
the $date_local and $date_gmt variables used "%s" format, instead
of "%A, %d-%b-%Y %H:%M:%S %Z" documented as the default and used
if there is SSI module context and timefmt wasn't modified using
the "config" SSI command.

While use of these variables outside of the SSI evaluation isn't strictly
valid, previous behaviour is certainly inconsistent, hence the fix.
---
 src/http/modules/ngx_http_ssi_filter_module.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/http/modules/ngx_http_ssi_filter_module.c b/src/http/modules/ngx_http_ssi_filter_module.c
index a53cd1472..aeb1376b7 100644
--- a/src/http/modules/ngx_http_ssi_filter_module.c
+++ b/src/http/modules/ngx_http_ssi_filter_module.c
@@ -213,6 +213,7 @@ static ngx_http_output_body_filter_pt    ngx_http_next_body_filter;
 static u_char ngx_http_ssi_string[] = "<!--";
 
 static ngx_str_t ngx_http_ssi_none = ngx_string("(none)");
+static ngx_str_t ngx_http_ssi_timefmt = ngx_string("%A, %d-%b-%Y %H:%M:%S %Z");
 static ngx_str_t ngx_http_ssi_null_string = ngx_null_string;
 
 
@@ -359,7 +360,7 @@ ngx_http_ssi_header_filter(ngx_http_request_t *r)
     ctx->params.nalloc = NGX_HTTP_SSI_PARAMS_N;
     ctx->params.pool = r->pool;
 
-    ngx_str_set(&ctx->timefmt, "%A, %d-%b-%Y %H:%M:%S %Z");
+    ctx->timefmt = ngx_http_ssi_timefmt;
     ngx_str_set(&ctx->errmsg,
                 "[an error occurred while processing the directive]");
 
@@ -2720,6 +2721,7 @@ ngx_http_ssi_date_gmt_local_variable(ngx_http_request_t *r,
 {
     ngx_http_ssi_ctx_t  *ctx;
     ngx_time_t          *tp;
+    ngx_str_t           *timefmt;
     struct tm            tm;
     char                 buf[NGX_HTTP_SSI_DATE_LEN];
 
@@ -2731,9 +2733,10 @@ ngx_http_ssi_date_gmt_local_variable(ngx_http_request_t *r,
 
     ctx = ngx_http_get_module_ctx(r, ngx_http_ssi_filter_module);
 
-    if (ctx == NULL
-        || (ctx->timefmt.len == sizeof("%s") - 1
-            && ctx->timefmt.data[0] == '%' && ctx->timefmt.data[1] == 's'))
+    timefmt = ctx ? &ctx->timefmt : &ngx_http_ssi_timefmt;
+
+    if (timefmt->len == sizeof("%s") - 1
+        && timefmt->data[0] == '%' && timefmt->data[1] == 's')
     {
         v->data = ngx_pnalloc(r->pool, NGX_TIME_T_LEN);
         if (v->data == NULL) {
@@ -2752,7 +2755,7 @@ ngx_http_ssi_date_gmt_local_variable(ngx_http_request_t *r,
     }
 
     v->len = strftime(buf, NGX_HTTP_SSI_DATE_LEN,
-                      (char *) ctx->timefmt.data, &tm);
+                      (char *) timefmt->data, &tm);
     if (v->len == 0) {
         return NGX_ERROR;
     }