Headers filter: empty Cache-Control is no longer added.

Much like with other headers, "add_header Cache-Control $value;" no longer
results in anything added to response headers if $value evaluates to an
empty string.

diff --git a/src/http/modules/ngx_http_headers_filter_module.c b/src/http/modules/ngx_http_headers_filter_module.c
index 0dfe8101ed6be6479486a023317727ecfe74b65a..e33e7ce527172cb18ea9fe88282a2fc956962193 100644 (file)
--- a/src/http/modules/ngx_http_headers_filter_module.c
+++ b/src/http/modules/ngx_http_headers_filter_module.c
@@ -339,6 +339,10 @@ ngx_http_add_cache_control(ngx_http_request_t *r, ngx_http_header_val_t *hv,
 {
     ngx_table_elt_t  *cc, **ccp;
 
+    if (value->len == 0) {
+        return NGX_OK;
+    }
+
     ccp = r->headers_out.cache_control.elts;
 
     if (ccp == NULL) {