server ｛ add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Headers' 'Authorization,Content-Type,Accept,Origin,User-Agent,DNT,Cache-Control,X-Mx-ReqToken'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE'; add_header PS 1； location / { ｝｝
参考：
http://stackoverflow.com/questions/18450310/nginx-add-header-not-working