access to xmlhttpRequet at http://url (redirectd from http://url) from origin http://url has been blocked by CORS policy:No 'Access-Control-Allow-Origin' header is present on the requested resource .
(简单讲第一xmlhttpRequest as http://url,这是一个cas单点登录服务器,第二个redirected from http://url. 为本地应用的一个接口,第三个origin http://url为 本地应用。)
from origin http://url has been blocked by CORS policy:No 'Access-Control-Allow-Origin' header is present on the requested resource .
from flask_cors import CORS CORS(app, resources=r'/*')
--你的cors是解决别人访问你的时候跨域。
好奇的是,应用已经添加支持跨域,现在又报这样消息。费解。