nginx deny all 和 return 一起使用时不生效
nginx 配置：
server {
listen 80 default_server;
server_name www.aceelf.com aceelf.com;
return 301 https://aceelf.com$request_uri;
}在配置如下时 deny all 并不会生效，我预计会执行 deny all 出现 403 错误，但是实际上会执行 return 返回 301；
server {
listen 80 default_server;
server_name www.aceelf.com aceelf.com;
deny all;
return 301 https://aceelf.com$request_uri;
}最终在 stackoverflow 上找到了答案：
In nginx, return directive is from rewrite module, and deny is from access module. According to nginx document and source code, rewrite module is processed in NGX_HTTP_REWRITE_PHASE phase (for return in location context), the access module is processed in NGX_HTTP_ACCESS_PHASE phase, rewrite phase happens before access phase, thus return stops request processing and returns 301 in rewrite phase.
在nginx中，return指令来自rewrite模块，deny指令来自access模块。根据nginx文档和源代码，重写模块在NGX_HTTP_rewrite_PHASE阶段进行处理（用于位置上下文中的返回），访问模块在NGX_HTTP_access_PHASE期间进行处理，重写阶段发生在访问阶段之前，因此返回停止请求处理，并在重写阶段返回301。