nginx设置允许跨域

server {
        listen       8088;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;
        add_header 'Access-Control-Allow-Methods' 'POST, GET, OPTIONS';
        add_header 'Access-Control-Allow-Headers' '*';
        add_header 'Access-Control-Allow-Origin' '*' always;
        add_header 'Access-Control-Allow-Credentials' 'true' ; #是否允许浏览器后续请求携带认证信息（cookies）,该值只能是true,如果服务器不要浏览器发送Cookie，删除该字段即可。
        
        #后端代理
        location /api/ {
            if ($request_method = 'OPTIONS') {
                return 204;
            }
            proxy_pass http://101.32.253.94:8080;
            
        }
        
        #前端代理
        location  / {
            # OPTIONS 直接返回204
            if ($request_method = 'OPTIONS') {
                return 204;
            }
            proxy_pass  http://localhost:3440; 
        }

        
        

}