[PATCH 5 of 5] Clear old Location header (if any) while adding new one

[Maxim Dounin]

# HG changeset patch
# User Maxim Dounin <mdounin at mdounin.ru>
# Date 1288669817 -10800
# Node ID 24596859ecb7d152308e0e8bc5e49e3adfb49b44
# Parent  15e61ffe345655369098c613d6f99484a0c171c8
Clear old Location header (if any) while adding new one.

This prevents incorrect behaviour when another redirect is issues within
error_page 302 handler.

diff --git a/src/http/modules/ngx_http_static_module.c b/src/http/modules/ngx_http_static_module.c
--- a/src/http/modules/ngx_http_static_module.c
+++ b/src/http/modules/ngx_http_static_module.c
@@ -139,6 +139,10 @@ ngx_http_static_handler(ngx_http_request
 
         ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
 
+        if (r->headers_out.location) {
+            r->headers_out.location->hash = 0;
+        }
+
         r->headers_out.location = ngx_palloc(r->pool, sizeof(ngx_table_elt_t));
         if (r->headers_out.location == NULL) {
             return NGX_HTTP_INTERNAL_SERVER_ERROR;
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -970,6 +970,10 @@ ngx_http_core_find_config_phase(ngx_http
     }
 
     if (rc == NGX_DONE) {
+        if (r->headers_out.location) {
+            r->headers_out.location->hash = 0;
+        }
+
         r->headers_out.location = ngx_list_push(&r->headers_out.headers);
         if (r->headers_out.location == NULL) {
             ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
@@ -1753,6 +1757,10 @@ ngx_http_send_response(ngx_http_request_
 
     if (status >= NGX_HTTP_MOVED_PERMANENTLY && status <= NGX_HTTP_SEE_OTHER) {
 
+        if (r->headers_out.location) {
+            r->headers_out.location->hash = 0;
+        }
+
         r->headers_out.location = ngx_list_push(&r->headers_out.headers);
         if (r->headers_out.location == NULL) {
             return NGX_HTTP_INTERNAL_SERVER_ERROR;
diff --git a/src/http/ngx_http_script.c b/src/http/ngx_http_script.c
--- a/src/http/ngx_http_script.c
+++ b/src/http/ngx_http_script.c
@@ -1106,6 +1106,10 @@ ngx_http_script_regex_end_code(ngx_http_
                           "rewritten redirect: \"%V\"", &e->buf);
         }
 
+        if (r->headers_out.location) {
+            r->headers_out.location->hash = 0;
+        }
+
         r->headers_out.location = ngx_list_push(&r->headers_out.headers);
         if (r->headers_out.location == NULL) {
             e->ip = ngx_http_script_exit;
diff --git a/src/http/ngx_http_special_response.c b/src/http/ngx_http_special_response.c
--- a/src/http/ngx_http_special_response.c
+++ b/src/http/ngx_http_special_response.c
@@ -570,6 +570,10 @@ ngx_http_send_error_page(ngx_http_reques
     ngx_str_set(&location->key, "Location");
     location->value = uri;
 
+    if (r->headers_out.location) {
+        r->headers_out.location->hash = 0;
+    }
+
     r->headers_out.location = location;
 
     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);