nginx跨域

location /common-service {
proxy_pass http://172.19.183.152:8600/proxy/common-service;
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto https;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_connect_timeout 4;
proxy_send_timeout 1200;
proxy_read_timeout 1200;
if ($request_method = 'OPTIONS') {
add_header 'Access-Control-Allow-Origin' '*' always;
add_header 'Access-Control-Allow-Methods' 'GET,POST,OPTIONS,PUT,DELETE' always;
add_header 'Access-Control-Allow-Headers' '*' always;
add_header 'Access-Control-Max-Age' 1728000 always;
add_header 'Content-Length' 0;
add_header 'Content-Type' 'text/plain; charset=utf-8';
return 204;
}

}