Nginx配置OPTIONS方法请求直接返回204状态

server
{
    listen 80;
    server_name www.5isousuo.com www.liqinglin.cn www.5wwfu6.cn;
    index index.php index.html index.htm default.php default.htm default.html;
    root /www/wwwroot/qqbt.app/public;
       location / {
				#禁止Scrapy等工具的抓取
				if ($http_user_agent ~* (Scrapy|Curl|HttpClient)) {
				     return 403;
				}
				#禁止指定UA及UA为空的访问
				if ($http_user_agent ~* "FeedDemon|Indy Library|Alexa Toolbar|AskTbFXTV|AhrefsBot|CrawlDaddy|CoolpadWebkit|Java|Feedly|UniversalFeedParser|ApacheBench|Microsoft URL Control|Swiftbot|ZmEu|oBot|jaunty|Python-urllib|lightDeckReports Bot|YYSpider|DigExt|HttpClient|MJ12bot|heritrix|EasouSpider|Ezooms|^$" ) {
				     return 403;             
				}
				#禁止非GET|HEAD|POST方式的抓取
				if ($request_method !~ ^(GET|HEAD|POST)$) {
				    return 403;
				}
        index  index.php index.html index.htm;
         #如果请求既不是一个文件，也不是一个目录，则执行一下重写规则
         if (!-e $request_filename)
         {
            #地址作为将参数rewrite到index.php上,让路由支持pathonfo模式。
            rewrite ^/(.*)$ /index.php?s=$1 last;
            #若是子目录则使用下面这句，将subdir改成目录名称即可。
            #rewrite ^/subdir/(.*)$ /subdir/index.php?s=$1;
         }
        client_max_body_size 100m;
        #配置如果是OPTIONS方法直接返回204状态
      if ($request_method = 'OPTIONS') {
           add_header 'Access-Control-Allow-Origin' '*' always;
           add_header 'Access-Control-Allow-Credentials' 'true';
           add_header 'Access-Control-Allow-Methods' 'GET, POST, PATCH, DELETE, PUT, OPTIONS';
           add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,  Access-Control-Expose-Headers, Token, Authorization';
           add_header 'Access-Control-Max-Age' 1728000;
           add_header 'Content-Type' 'text/plain charset=UTF-8';
           add_header 'Content-Length' 0;
           return 204;
      }   
    }
    #SSL-START SSL相关配置，请勿删除或修改下一行带注释的404规则
    #error_page 404/404.html;
    #SSL-END
    
    #ERROR-PAGE-START  错误页配置，可以注释、删除或修改
    error_page 404 /404.html;
    error_page 502 /502.html;
    #ERROR-PAGE-END
    
    #PHP-INFO-START  PHP引用配置，可以注释或修改
    include enable-php-72.conf;
    #PHP-INFO-END
    
    #REWRITE-START URL重写规则引用,修改后将导致面板设置的伪静态规则失效
    include /www/server/panel/vhost/rewrite/qqbt.app.conf;
    #REWRITE-END
   
    #禁止访问的文件或目录
    location ~ ^/(\.user.ini|\.htaccess|\.git|\.svn|\.project|LICENSE|README.md)
    {
        return 404;
    }
    
}