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CURL 返回http code 417错误

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Release： 2016-06-06 20:23:36
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如题， 今天下午服务器突然报警，所有访问其中一台服务器的接口全部返回 http_code 417 错误，相同的代码 在其他的服务器则正常返回数据。所有请求的CURL方法都是通过同一个基础的 http请求类库来完成的.

虽然最后在 stackoverflow 找到解决方案，但是返回 417 错误的原因是什么呢？

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如题， 今天下午服务器突然报警，所有访问其中一台服务器的接口全部返回 http_code 417 错误，相同的代码 在其他的服务器则正常返回数据。所有请求的CURL方法都是通过同一个基础的 http请求类库来完成的.

虽然最后在 stackoverflow 找到解决方案，但是返回 417 错误的原因是什么呢？

与服务器环境有关，直接引用两篇博文吧
http://blog.csdn.net/wudiyi815/article/details/8650341
http://www.cnblogs.com/zox2011/archive/2013/06/06/3121247.html

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