[PATCH] Proxy: support variables for proxy_method directive

[Dmitry Lazurkin]

Formatting of previous patch was corrupted. Sorry for another message. I 
don't known how to correct work with mailing list. I try to set fixed 
width for patch.

# HG changeset patch
# User Dmitry Lazurkin <dilaz03 at gmail.com>
# Date 1476631441 -10800
#      Sun Oct 16 18:24:01 2016 +0300
# Node ID 9fbfc0ccb28e1eee624ff212de88fa1c051f09d9
# Parent  56d6bfe6b609c565a9f500bde573fd9b488ff960
Proxy: support variables for proxy_method directive.

diff -r 56d6bfe6b609 -r 9fbfc0ccb28e 
src/http/modules/ngx_http_proxy_module.c
--- a/src/http/modules/ngx_http_proxy_module.c    Fri Oct 21 16:28:39 
2016 +0300
+++ b/src/http/modules/ngx_http_proxy_module.c    Sun Oct 16 18:24:01 
2016 +0300
@@ -73,7 +73,7 @@
      ngx_array_t                   *cookie_domains;
      ngx_array_t                   *cookie_paths;

-    ngx_str_t                      method;
+    ngx_http_complex_value_t      *method;
      ngx_str_t                      location;
      ngx_str_t                      url;

@@ -380,7 +380,7 @@

      { ngx_string("proxy_method"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
-      ngx_conf_set_str_slot,
+      ngx_http_set_complex_value_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_proxy_loc_conf_t, method),
        NULL },
@@ -1159,8 +1159,10 @@
          /* HEAD was changed to GET to cache response */
          method = u->method;

-    } else if (plcf->method.len) {
-        method = plcf->method;
+    } else if (plcf->method != NULL) {
+        if (ngx_http_complex_value(r, plcf->method, &method) != NGX_OK) {
+            return NGX_ERROR;
+        }

      } else {
          method = r->method_name;
@@ -3158,7 +3160,9 @@

  #endif

-    ngx_conf_merge_str_value(conf->method, prev->method, "");
+    if (conf->method == NULL) {
+        conf->method = prev->method;
+    }

ngx_conf_merge_value(conf->upstream.pass_request_headers,
prev->upstream.pass_request_headers, 1);