Reworked multi headers to use linked lists.

Multi headers are now using linked lists instead of arrays.  Notably,
the following fields were changed: r->headers_in.cookies (renamed
to r->headers_in.cookie), r->headers_in.x_forwarded_for,
r->headers_out.cache_control, r->headers_out.link, u->headers_in.cache_control
u->headers_in.cookies (renamed to u->headers_in.set_cookie).

The r->headers_in.cookies and u->headers_in.cookies fields were renamed
to r->headers_in.cookie and u->headers_in.set_cookie to match header names.

The ngx_http_parse_multi_header_lines() and ngx_http_parse_set_cookie_lines()
functions were changed accordingly.

With this change, multi headers are now essentially equivalent to normal
headers, and following changes will further make them equivalent.

1 files changed, 12 insertions, 14 deletions

diff --git a/src/http/v2/ngx_http_v2_filter_module.c b/src/http/v2/ngx_http_v2_filter_module.c
index 62b6a047c..5f8626a40 100644
--- a/src/http/v2/ngx_http_v2_filter_module.c
+++ b/src/http/v2/ngx_http_v2_filter_module.c
@@ -674,14 +674,14 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
 static ngx_int_t
 ngx_http_v2_push_resources(ngx_http_request_t *r)
 {
-    u_char                     *start, *end, *last;
-    ngx_int_t                   rc;
-    ngx_str_t                   path;
-    ngx_uint_t                  i, push;
-    ngx_table_elt_t           **h;
-    ngx_http_v2_loc_conf_t     *h2lcf;
-    ngx_http_complex_value_t   *pushes;
-    ngx_str_t                   binary[NGX_HTTP_V2_PUSH_HEADERS];
+    u_char                    *start, *end, *last;
+    ngx_int_t                  rc;
+    ngx_str_t                  path;
+    ngx_uint_t                 i, push;
+    ngx_table_elt_t           *h;
+    ngx_http_v2_loc_conf_t    *h2lcf;
+    ngx_http_complex_value_t  *pushes;
+    ngx_str_t                  binary[NGX_HTTP_V2_PUSH_HEADERS];
 
     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                    "http2 push resources");
@@ -725,15 +725,13 @@ ngx_http_v2_push_resources(ngx_http_request_t *r)
         return NGX_OK;
     }
 
-    h = r->headers_out.link.elts;
-
-    for (i = 0; i < r->headers_out.link.nelts; i++) {
+    for (h = r->headers_out.link; h; h = h->next) {
 
         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "http2 parse link: \"%V\"", &h[i]->value);
+                       "http2 parse link: \"%V\"", &h->value);
 
-        start = h[i]->value.data;
-        end = h[i]->value.data + h[i]->value.len;
+        start = h->value.data;
+        end = h->value.data + h->value.len;
 
     next_link: