|  | *** Variables *** | 
|  | # Response codes | 
|  | ${HTTP_CONTINUE}                         100 | 
|  | ${HTTP_SWITCHING_PROTOCOLS}              101 | 
|  | ${HTTP_PROCESSING}                       102 | 
|  | ${HTTP_OK}                               200 | 
|  | ${HTTP_CREATED}                          201 | 
|  | ${HTTP_ACCEPTED}                         202 | 
|  | ${HTTP_NON_AUTHORITATIVE_INFORMATION}    203 | 
|  | ${HTTP_NO_CONTENT}                       204 | 
|  | ${HTTP_RESET_CONTENT}                    205 | 
|  | ${HTTP_PARTIAL_CONTENT}                  206 | 
|  | ${HTTP_MULTI_STATUS}                     207 | 
|  | ${HTTP_IM_USED}                          226 | 
|  | ${HTTP_MULTIPLE_CHOICES}                 300 | 
|  | ${HTTP_MOVED_PERMANENTLY}                301 | 
|  | ${HTTP_FOUND}                            302 | 
|  | ${HTTP_SEE_OTHER}                        303 | 
|  | ${HTTP_NOT_MODIFIED}                     304 | 
|  | ${HTTP_USE_PROXY}                        305 | 
|  | ${HTTP_TEMPORARY_REDIRECT}               307 | 
|  | ${HTTP_BAD_REQUEST}                      400 | 
|  | ${HTTP_UNAUTHORIZED}                     401 | 
|  | ${HTTP_PAYMENT_REQUIRED}                 402 | 
|  | ${HTTP_FORBIDDEN}                        403 | 
|  | ${HTTP_NOT_FOUND}                        404 | 
|  | ${HTTP_METHOD_NOT_ALLOWED}               405 | 
|  | ${HTTP_NOT_ACCEPTABLE}                   406 | 
|  | ${HTTP_PROXY_AUTHENTICATION_REQUIRED}    407 | 
|  | ${HTTP_REQUEST_TIMEOUT}                  408 | 
|  | ${HTTP_CONFLICT}                         409 | 
|  | ${HTTP_GONE}                             410 | 
|  | ${HTTP_LENGTH_REQUIRED}                  411 | 
|  | ${HTTP_PRECONDITION_FAILED}              412 | 
|  | ${HTTP_REQUEST_ENTITY_TOO_LARGE}         413 | 
|  | ${HTTP_REQUEST_URI_TOO_LONG}             414 | 
|  | ${HTTP_UNSUPPORTED_MEDIA_TYPE}           415 | 
|  | ${HTTP_REQUESTED_RANGE_NOT_SATISFIABLE}  416 | 
|  | ${HTTP_EXPECTATION_FAILED}               417 | 
|  | ${HTTP_UNPROCESSABLE_ENTITY}             422 | 
|  | ${HTTP_LOCKED}                           423 | 
|  | ${HTTP_FAILED_DEPENDENCY}                424 | 
|  | ${HTTP_UPGRADE_REQUIRED}                 426 | 
|  | ${HTTP_INTERNAL_SERVER_ERROR}            500 | 
|  | ${HTTP_NOT_IMPLEMENTED}                  501 | 
|  | ${HTTP_BAD_GATEWAY}                      502 | 
|  | ${HTTP_SERVICE_UNAVAILABLE}              503 | 
|  | ${HTTP_GATEWAY_TIMEOUT}                  504 | 
|  | ${HTTP_HTTP_VERSION_NOT_SUPPORTED}       505 | 
|  | ${HTTP_INSUFFICIENT_STORAGE}             507 | 
|  | ${HTTP_NOT_EXTENDED}                     510 |