即将跳转到外部网站，安全性未知，是否继续？
https://github.com/snicoll/spring-boot/commit/2131d2272fde3c06367c6a400e461dc968f5ebf8#diff-0e413d6d5d6a14bbea4e82383b53a7784b62b2f56ce4f6d32eecfd16de133314R642