request header field if-modified-since is not allowed by access-control-allow-headers in preflight response.
服务端已经设置了Access-Control-Allow-Origin:* ,这个大概会是什么方面的问题呢
求指教如何解决啊
request header field if-modified-since is not allowed by access-control-allow-headers in preflight response.
服务端已经设置了Access-Control-Allow-Origin:* ,这个大概会是什么方面的问题呢
求指教如何解决啊
从这里看就是跨域问题
header("Access-Control-Allow-Origin:来源域名");
header("Access-Control-Allow-Credentials:true");