解决访问本地jenkins报错：No valid crumb was included in request for /jenkins/createItem by admin. Returning 4
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今天在通过Jenkins接口创建项目的时候，返回报错HTTP403，刚开始还以为自己参数传输错误，检查了好几遍也没找出啥问题。后面一看控制台才发现这个错误，No valid crumb was included in request for /jenkins/createItem by admin. Returning 403。
错误原因：jenkins在http请求头部中放置了一个名为.crumb的token。在使用了反向代理，并且在jenkins设置中勾选了“防止跨站点请求伪造（Prevent Cross Site Request Forgery exploits）”之后此token会被转发服务器apache/nginx认为是不合法头部而去掉。导致跳转失败。
解决办法：在Jenkins设置===》配置全局安全性里面，取消勾选防止跨站点请求伪造。就可以正常提交了。
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