nginx跨域

         #允许跨域请求的域，* 代表所有
         add_header 'Access-Control-Allow-Origin' *;
         ##允许请求的header
         add_header 'Access-Control-Allow-Headers' *;
         ##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' *;