+ // Aliases for HTTP response codes.
+ const HTTP_CONTINUE = 100;
+ const SWITCHING_PROTOCOLS = 101;
+ const PROCESSING = 102;
+
+ const OK = 200;
+ const CREATED = 201;
+ const ACCEPTED = 202;
+ const NON_AUTHORITATIVE_INFORMATION = 203;
+ const NO_CONTENT = 204;
+ const RESET_CONTENT = 205;
+ const PARTIAL_CONTENT = 206;
+ const MULTI_STATUS = 207;
+ const IM_USED = 226;
+
+ const MULTIPLE_CHOICES = 300;
+ const MOVED_PERMANENTLY = 301;
+ const FOUND = 302;
+ const SEE_OTHER = 303;
+ const NOT_MODIFIED = 304;
+ const USE_PROXY = 305;
+ const RESERVED = 306;
+ const TEMPORARY_REDIRECT = 307;
+ const PERMANENT_REDIRECT = 308;
+
+ const BAD_REQUEST = 400;
+ const UNAUTHORIZED = 401;
+ const PAYMENT_REQUIRED = 402;
+ const FORBIDDEN = 403;
+ const NOT_FOUND = 404;
+ const METHOD_NOT_ALLOWED = 405;
+ const NOT_ACCEPTABLE = 406;
+ const PROXY_AUTHENTICATION_REQUIRED = 407;
+ const REQUEST_TIMEOUT = 408;
+ const CONFLICT = 409;
+ const GONE = 410;
+ const LENGTH_REQUIRED = 411;
+ const PRECONDITION_FAILED = 412;
+ const REQUEST_ENTITY_TOO_LARGE = 413;
+ const REQUEST_URI_TOO_LONG = 414;
+ const UNSUPPORTED_MEDIA_TYPE = 415;
+ const REQUESTED_RANGE_NOT_SATISFIABLE = 416;
+ const EXPECTATION_FAILED = 417;
+ const IM_A_TEAPOT = 418;
+ const MISDIRECTED_REQUEST = 421;
+ const UNPROCESSABLE_ENTITY = 422;
+ const LOCKED = 423;
+ const FAILED_DEPENDENCY = 424;
+ const UPGRADE_REQUIRED = 426;
+ const PRECONDITION_REQUIRED = 428;
+ const TOO_MANY_REQUESTS = 429;
+ const REQUEST_HEADER_FIELDS_TOO_LARGE = 431;
+ const UNAVAILABLE_FOR_LEGAL_REASONS = 451;
+
+ const INTERNAL_SERVER_ERROR = 500;
+ const NOT_IMPLEMENTED = 501;
+ const BAD_GATEWAY = 502;
+ const SERVICE_UNAVAILABLE = 503;
+ const GATEWAY_TIMEOUT = 504;
+ const HTTP_VERSION_NOT_SUPPORTED = 505;
+ const VARIANT_ALSO_NEGOTIATES = 506;
+ const INSUFFICIENT_STORAGE = 507;
+ const NOT_EXTENDED = 510;
+ const NETWORK_AUTHENTICATION_REQUIRED = 511;
+