Client Request Errors
| 400 | Bad Request |
| 401 | Authorization Required |
| 403 | Forbidden |
| 404 | Not Found |
| 405 | Method Not Allowed |
| 406 | Not Acceptable (encoding) |
| 407 | Proxy Authentication Required |
| 408 | Request Timed Out |
| 409 | Conflicting Request |
| 410 | Gone |
| 411 | Content-Length Required |
| 412 | Precondition Failed |
| 413 | Request Entity Too Long |
| 414 | Request URI Too Long |
| 415 | Unsupported Media Type |
Server Errors
| 500 | Internal Server Error |
| 501 | Not Implemented |
| 502 | Bad Gateway |
| 503 | Service Unavailable |
| 504 | Gateway Timeout |
| 505 | HTTP Version Not Supported |
