limit the ngx_http_index_module methods to GET, HEAD and POST

src/http/modules/ngx_http_index_module.c

diff --git a/src/http/modules/ngx_http_index_module.c b/src/http/modules/ngx_http_index_module.c
index 4df57f9..0f49551 100644
--- a/src/http/modules/ngx_http_index_module.c
+++ b/src/http/modules/ngx_http_index_module.c
@@ -140,6 +140,10 @@
         return NGX_DECLINED;
     }
 
+    if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
+        return NGX_DECLINED;
+    }
+
     /* TODO: Win32 */
     if (r->zero_in_uri) {
         return NGX_DECLINED;