Ref:HTTP 协议状态码的含义

"100" : Continue

"101" : witching Protocols

"200" : OK

"201" : Created

"202" : Accepted

"203" : Non-Authoritative Information

"204" : No Content

"205" : Reset Content

"206" : Partial Content

"300" : Multiple Choices

"301" : Moved Permanently

"302" : Found

"303" : See Other

"304" : Not Modified

"305" : Use Proxy

"307" : Temporary Redirect

"400" : Bad Request

"401" : Unauthorized

"402" : Payment Required

"403" : Forbidden

"404" : Not Found

"405" : Method Not Allowed

"406" : Not Acceptable

"407" : Proxy Authentication Required

"408" : Request Time-out

"409" : Conflict

"410" : Gone

"411" : Length Required

"412" : Precondition Failed

"413" : Request Entity Too Large

"414" : Request-URI Too Large

"415" : Unsupported Media Type

"416" : Requested range not satisfiable

"417" : Expectation Failed

"500" : Internal Server Error

"501" : Not Implemented

"502" : Bad Gateway

"503" : Service Unavailable

"504" : Gateway Time-out

"505" : HTTP Version not supported