nginx 跨域

                          location /api/ {
                                        add_header 'Access-Control-Allow-Origin' '*';
                                        if ($request_method = 'OPTIONS') {
                                                   add_header 'Access-Control-Allow-Origin' '*';
                                                   add_header 'Access-Control-Max-Age' 1728000;
                                                   add_header 'Content-Type' 'text/plain charset=UTF-8';
                                                   add_header 'Content-Length' 0;
                                                   return 204;
                                             }
                                        #proxy_pass http://AppApi;
                                        proxy_set_header  X-Real-IP  $remote_addr;
                                        proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
                                        proxy_http_version 1.1;
                                        proxy_set_header X-Nginx-Proxy true;
                                        proxy_set_header Connection "";
                                        proxy_pass http://127.0.0.1:7128/;
                                }