在nginx.config文件中设置的访问控制原始标头仍然会出现访问控制原始标头允许的错误

Question

http {
  include /etc/nginx/conf.d/*.conf;
  include /etc/nginx/sites-enabled/*;

  server {
      if ($request_method = 'POST') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
      }
      if ($request_method = 'GET') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
      }
  }
}

我从其他服务器点击请求时收到以下错误：

  

访问控制允许来源

标头出现在请求的资源上。因此，不允许原点http://localhost:3000访问。响应的HTTP状态代码为404.