# 1.9.3-p194 :015 > pp Rack::Utils.const_get('HTTP_STATUS_CODES')
{100=>"Continue",
 101=>"Switching Protocols",
 102=>"Processing",
 200=>"OK",
 201=>"Created",
 202=>"Accepted",
 203=>"Non-Authoritative Information",
 204=>"No Content",
 205=>"Reset Content",
 206=>"Partial Content",
 207=>"Multi-Status",
 226=>"IM Used",
 300=>"Multiple Choices",
 301=>"Moved Permanently",
 302=>"Found",
 303=>"See Other",
 304=>"Not Modified",
 305=>"Use Proxy",
 306=>"Reserved",
 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",
 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",
 418=>"I'm a Teapot",
 422=>"Unprocessable Entity",
 423=>"Locked",
 424=>"Failed Dependency",
 426=>"Upgrade Required",
 500=>"Internal Server Error",
 501=>"Not Implemented",
 502=>"Bad Gateway",
 503=>"Service Unavailable",
 504=>"Gateway Timeout",
 505=>"HTTP Version Not Supported",
 506=>"Variant Also Negotiates",
 507=>"Insufficient Storage",
 510=>"Not Extended"}