#允许跨域请求的域，*代表所有
add_ header ' Access-Control-Allow-0rigin' *;
#允许带上cookie请求
add_ header ' Access-Control-Allow-Credentials' 'true';
#允许请求的方法，比如GET/POST/PUT/DELETE
add_ header ' Access-Control-Allow-Methods' *;
#允许请求的header
add_ header ' Access-Control-Allow-Headers' *;