HTTP状态码
100:Continue
101:Switching 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
306:
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 Timeout
409:Conflict
410:Gone
500:Internet Server Error
501:Not Implemented
502:Bad Gateway
503:Service Unavailable
504:Gateway Timeout
505:HTTP Version Not Supported