HTTP Status code list
1. Informational
100 : Continue
101 : Switching Protocols
2. Successful
200 : OK
201 : Created
202 : Accepted
203 : Non-Authoritative Information
204 : No Content
205 : Reset Content
206 : Partial Content
3. Redirection
300 : Multiple Choices
301 : Moved Permanently
302 : Found
303 : See Other
304 : Not Modified
305 : Use Proxy
306 : (Unused)
307 : Temporary Redirect
4. Client Error
400 : Bad Request
401 : Unauthorized
402 : Payment Required
403 : Forbidden(접근권한 제어)
404 : Not Found(파일 없음)
405 : Method Not Allowed
406 : Not Acceptable
407 : Proxy authentication Required
408 : Request Timeout
409 : Conflict
410 : Gone
411 : Length Required
412 : Precondition Failed
413 : Request Entity Too Large
414 : Request URI Too Long
415 : Unsupported Media Type
416 : Requested Range Not Satisfiable
417 : Expectation Failed
5. Server Error
500 : Internal Server Error
501 : Not Implemented
502 : Bad Gateway
503 : Service Unavailable
504 : Gateway Timeout
505 : HTTP Version Not Supported
