因为是一堆跳转操作,普通的页面出现 https 加载 http 脚本会弹出提示让你允许,这个还不会弹出提示
crossdomain2.php?action=login&entry=weibo&r=https%3A%2F%2Fpassport.weibo.com%2Fwbsso%2Flogin%3Fssos …:1
Mixed Content: The page at 'https://login.sina.com.cn/crossdomain2.php?action=login&entry=weibo&r=https …' was loaded over HTTPS,
but requested an insecure script 'http://i.sso.sina.com.cn/js/ssologin.js'. This request has been blocked; the content must be served over HTTPS.