"gzip_vary on" always sends "Vary: Accept-Encoding" header

3 files changed, 14 insertions, 34 deletions

diff --git a/src/http/modules/ngx_http_gzip_filter_module.c b/src/http/modules/ngx_http_gzip_filter_module.c
index 367731898..1ff45ea76 100644
--- a/src/http/modules/ngx_http_gzip_filter_module.c
+++ b/src/http/modules/ngx_http_gzip_filter_module.c
@@ -204,12 +204,11 @@ static ngx_http_output_body_filter_pt    ngx_http_next_body_filter;
 static ngx_int_t
 ngx_http_gzip_header_filter(ngx_http_request_t *r)
 {
-    ngx_str_t                 *type;
-    ngx_uint_t                 i;
-    ngx_table_elt_t           *h;
-    ngx_http_gzip_ctx_t       *ctx;
-    ngx_http_gzip_conf_t      *conf;
-    ngx_http_core_loc_conf_t  *clcf;
+    ngx_str_t             *type;
+    ngx_uint_t             i;
+    ngx_table_elt_t       *h;
+    ngx_http_gzip_ctx_t   *ctx;
+    ngx_http_gzip_conf_t  *conf;
 
     conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
 
@@ -264,21 +263,6 @@ found:
 
     r->headers_out.content_encoding = h;
 
-    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
-
-    if (clcf->gzip_vary) {
-        h = ngx_list_push(&r->headers_out.headers);
-        if (h == NULL) {
-            return NGX_ERROR;
-        }
-
-        h->hash = 1;
-        h->key.len = sizeof("Vary") - 1;
-        h->key.data = (u_char *) "Vary";
-        h->value.len = sizeof("Accept-Encoding") - 1;
-        h->value.data = (u_char *) "Accept-Encoding";
-    }
-
     ctx->length = r->headers_out.content_length_n;
 
     r->main_filter_need_in_memory = 1;
diff --git a/src/http/modules/ngx_http_gzip_static_module.c b/src/http/modules/ngx_http_gzip_static_module.c
index c37364910..e6d44ec7b 100644
--- a/src/http/modules/ngx_http_gzip_static_module.c
+++ b/src/http/modules/ngx_http_gzip_static_module.c
@@ -203,19 +203,6 @@ ngx_http_gzip_static_handler(ngx_http_request_t *r)
 
     r->headers_out.content_encoding = h;
 
-    if (clcf->gzip_vary) {
-        h = ngx_list_push(&r->headers_out.headers);
-        if (h == NULL) {
-            return NGX_ERROR;
-        }
-
-        h->hash = 1;
-        h->key.len = sizeof("Vary") - 1;
-        h->key.data = (u_char *) "Vary";
-        h->value.len = sizeof("Accept-Encoding") - 1;
-        h->value.data = (u_char *) "Accept-Encoding";
-    }
-
     /* we need to allocate all before the header would be sent */
 
     b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
diff --git a/src/http/ngx_http_header_filter_module.c b/src/http/ngx_http_header_filter_module.c
index b7f26f654..777b526e7 100644
--- a/src/http/ngx_http_header_filter_module.c
+++ b/src/http/ngx_http_header_filter_module.c
@@ -347,6 +347,10 @@ ngx_http_header_filter(ngx_http_request_t *r)
         len += sizeof("Connection: closed" CRLF) - 1;
     }
 
+    if (r->gzip && clcf->gzip_vary) {
+        len += sizeof("Vary: Accept-Encoding" CRLF) - 1;
+    }
+
     part = &r->headers_out.headers.part;
     header = part->elts;
 
@@ -516,6 +520,11 @@ ngx_http_header_filter(ngx_http_request_t *r)
                              sizeof("Connection: close" CRLF) - 1);
     }
 
+    if (r->gzip && clcf->gzip_vary) {
+        b->last = ngx_cpymem(b->last, "Vary: Accept-Encoding" CRLF,
+                             sizeof("Vary: Accept-Encoding" CRLF) - 1);
+    }
+
     part = &r->headers_out.headers.part;
     header = part->elts;