--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/StatusCodes.inc.php	Sun Jan 22 19:22:00 2023 +0100
@@ -0,0 +1,311 @@
+<?php
+/**
+ * StatusCodes provides named constants for
+ * HTTP protocol status codes. Written for the
+ * Recess Framework (http://www.recessframework.com/)
+ *
+ * @author Kris Jordan
+ * @author Tom Fredrik Blenning Klaussen
+ * @copyright MIT
+ */
+class StatusCodes
+{
+  // [Informational 1xx]
+  /**
+   * <a href="http://httpstatus.es/100">HTTP_CONTINUE</a>
+   */
+  const HTTP_CONTINUE = 100;
+  /**
+   * <a href="http://httpstatus.es/101">HTTP_SWITCHING_PROTOCOLS</a>
+   */
+  const HTTP_SWITCHING_PROTOCOLS = 101;
+
+  // [Successful 2xx]
+  /**
+   * <a href="http://httpstatus.es/200">HTTP_OK</a>
+   */
+  const HTTP_OK = 200;
+  /**
+   * <a href="http://httpstatus.es/201">HTTP_CREATED</a>
+   */
+  const HTTP_CREATED = 201;
+  /**
+   * <a href="http://httpstatus.es/202">HTTP_ACCEPTED</a>
+   */
+  const HTTP_ACCEPTED = 202;
+  /**
+   * <a href="http://httpstatus.es/203">HTTP_ACCEPTED</a>
+   */
+  const HTTP_NONAUTHORITATIVE_INFORMATION = 203;
+  /**
+   * <a href="http://httpstatus.es/204">HTTP_NO_CONTENT</a>
+   */
+  const HTTP_NO_CONTENT = 204;
+  /**
+   * <a href="http://httpstatus.es/205">HTTP_RESET_CONTENT</a>
+   */
+  const HTTP_RESET_CONTENT = 205;
+  /**
+   * <a href="http://httpstatus.es/206">HTTP_PARTIAL_CONTENT</a>
+   */
+  const HTTP_PARTIAL_CONTENT = 206;
+
+  // [Redirection 3xx]
+  /**
+   * <a href="http://httpstatus.es/300">HTTP_MULTIPLE_CHOICES</a>
+   */
+  const HTTP_MULTIPLE_CHOICES = 300;
+  /**
+   * <a href="http://httpstatus.es/301">HTTP_MOVED_PERMANENTLY</a>
+   */
+  const HTTP_MOVED_PERMANENTLY = 301;
+  /**
+   * <a href="http://httpstatus.es/302">HTTP_FOUND</a>
+   */
+  const HTTP_FOUND = 302;
+  /**
+   * <a href="http://httpstatus.es/303">HTTP_SEE_OTHER</a>
+   */
+  const HTTP_SEE_OTHER = 303;
+  /**
+   * <a href="http://httpstatus.es/304">HTTP_NOT_MODIFIED</a>
+   */
+  const HTTP_NOT_MODIFIED = 304;
+  /**
+   * <a href="http://httpstatus.es/305">HTTP_USE_PROXY</a>
+   */
+  const HTTP_USE_PROXY = 305;
+  /**
+   * <a href="http://httpstatus.es/306">HTTP_UNUSED</a>
+   */
+  const HTTP_UNUSED = 306;
+  /**
+   * <a href="http://httpstatus.es/307">HTTP_TEMPORARY_REDIRECT</a>
+   */
+  const HTTP_TEMPORARY_REDIRECT = 307;
+
+  // [Client Error 4xx]
+  /**
+   * Defines the beginning of errorCodes
+   * @private
+   */
+  const errorCodesBeginAt = 400;
+  /**
+   * <a href="http://httpstatus.es/400">HTTP_BAD_REQUEST</a>
+   */
+  const HTTP_BAD_REQUEST = 400;
+  /**
+   * <a href="http://httpstatus.es/401">HTTP_UNAUTHORIZED</a>
+   */
+  const HTTP_UNAUTHORIZED = 401;
+  /**
+   * <a href="http://httpstatus.es/402">HTTP_PAYMENT_REQUIRED</a>
+   */
+  const HTTP_PAYMENT_REQUIRED = 402;
+  /**
+   * <a href="http://httpstatus.es/403">HTTP_FORBIDDEN</a>
+   */
+  const HTTP_FORBIDDEN = 403;
+  /**
+   * <a href="http://httpstatus.es/404">HTTP_NOT_FOUND</a>
+   */
+  const HTTP_NOT_FOUND = 404;
+  /**
+   * <a href="http://httpstatus.es/405">HTTP_METHOD_NOT_ALLOWED</a>
+   */
+  const HTTP_METHOD_NOT_ALLOWED = 405;
+  /**
+   * <a href="http://httpstatus.es/406">HTTP_NOT_ACCEPTABLE</a>
+   */
+  const HTTP_NOT_ACCEPTABLE = 406;
+  /**
+   * <a href="http://httpstatus.es/407">HTTP_PROXY_AUTHENTICATION_REQUIRED</a>
+   */
+  const HTTP_PROXY_AUTHENTICATION_REQUIRED = 407;
+  /**
+   * <a href="http://httpstatus.es/408">HTTP_REQUEST_TIMEOUT</a>
+   */
+  const HTTP_REQUEST_TIMEOUT = 408;
+  /**
+   * <a href="http://httpstatus.es/409">HTTP_CONFLICT</a>
+   */
+  const HTTP_CONFLICT = 409;
+  /**
+   * <a href="http://httpstatus.es/410">HTTP_GONE</a>
+   */
+  const HTTP_GONE = 410;
+  /**
+   * <a href="http://httpstatus.es/411">HTTP_LENGTH_REQUIRED</a>
+   */
+  const HTTP_LENGTH_REQUIRED = 411;
+  /**
+   * <a href="http://httpstatus.es/412">HTTP_PRECONDITION_FAILED</a>
+   */
+  const HTTP_PRECONDITION_FAILED = 412;
+  /**
+   * <a href="http://httpstatus.es/413">HTTP_REQUEST_ENTITY_TOO_LARGE</a>
+   */
+  const HTTP_REQUEST_ENTITY_TOO_LARGE = 413;
+  /**
+   * <a href="http://httpstatus.es/414">HTTP_REQUEST_URI_TOO_LONG</a>
+   */
+  const HTTP_REQUEST_URI_TOO_LONG = 414;
+  /**
+   * <a href="http://httpstatus.es/415">HTTP_UNSUPPORTED_MEDIA_TYPE</a>
+   */
+  const HTTP_UNSUPPORTED_MEDIA_TYPE = 415;
+  /**
+   * <a href="http://httpstatus.es/416">HTTP_REQUESTED_RANGE_NOT_SATISFIABLE</a>
+   */
+  const HTTP_REQUESTED_RANGE_NOT_SATISFIABLE = 416;
+  /**
+   * <a href="http://httpstatus.es/417">HTTP_EXPECTATION_FAILED</a>
+   */
+  const HTTP_EXPECTATION_FAILED = 417;
+
+  // [Server Error 5xx]
+  /**
+   * <a href="http://httpstatus.es/500">HTTP_INTERNAL_SERVER_ERROR</a>
+   */
+  const HTTP_INTERNAL_SERVER_ERROR = 500;
+  /**
+   * <a href="http://httpstatus.es/501">HTTP_NOT_IMPLEMENTED</a>
+   */
+  const HTTP_NOT_IMPLEMENTED = 501;
+  /**
+   * <a href="http://httpstatus.es/502">HTTP_BAD_GATEWAY</a>
+   */
+  const HTTP_BAD_GATEWAY = 502;
+  /**
+   * <a href="http://httpstatus.es/503">HTTP_SERVICE_UNAVAILABLE</a>
+   */
+  const HTTP_SERVICE_UNAVAILABLE = 503;
+  /**
+   * <a href="http://httpstatus.es/504">HTTP_GATEWAY_TIMEOUT</a>
+   */
+  const HTTP_GATEWAY_TIMEOUT = 504;
+  /**
+   * <a href="http://httpstatus.es/505">HTTP_VERSION_NOT_SUPPORTED</a>
+   */
+  const HTTP_VERSION_NOT_SUPPORTED = 505;
+
+  private static $messages =
+    array(
+	  // [Informational 1xx]
+	  100=>'100 Continue',
+	  101=>'101 Switching Protocols',
+
+	  // [Successful 2xx]
+	  200=>'200 OK',
+	  201=>'201 Created',
+	  202=>'202 Accepted',
+	  203=>'203 Non-Authoritative Information',
+	  204=>'204 No Content',
+	  205=>'205 Reset Content',
+	  206=>'206 Partial Content',
+
+	  // [Redirection 3xx]
+	  300=>'300 Multiple Choices',
+	  301=>'301 Moved Permanently',
+	  302=>'302 Found',
+	  303=>'303 See Other',
+	  304=>'304 Not Modified',
+	  305=>'305 Use Proxy',
+	  306=>'306 (Unused)',
+	  307=>'307 Temporary Redirect',
+
+	  // [Client Error 4xx]
+	  400=>'400 Bad Request',
+	  401=>'401 Unauthorized',
+	  402=>'402 Payment Required',
+	  403=>'403 Forbidden',
+	  404=>'404 Not Found',
+	  405=>'405 Method Not Allowed',
+	  406=>'406 Not Acceptable',
+	  407=>'407 Proxy Authentication Required',
+	  408=>'408 Request Timeout',
+	  409=>'409 Conflict',
+	  410=>'410 Gone',
+	  411=>'411 Length Required',
+	  412=>'412 Precondition Failed',
+	  413=>'413 Request Entity Too Large',
+	  414=>'414 Request-URI Too Long',
+	  415=>'415 Unsupported Media Type',
+	  416=>'416 Requested Range Not Satisfiable',
+	  417=>'417 Expectation Failed',
+
+	  // [Server Error 5xx]
+	  500=>'500 Internal Server Error',
+	  501=>'501 Not Implemented',
+	  502=>'502 Bad Gateway',
+	  503=>'503 Service Unavailable',
+	  504=>'504 Gateway Timeout',
+	  505=>'505 HTTP Version Not Supported'
+	  );
+
+  /**
+   * Get the header for the specified code.
+   *
+   * @param $code Http status code
+   * @return A textual representation of the header
+   */
+  public static function httpHeaderFor($code)
+  {
+    return 'HTTP/1.1 ' . self::$messages[$code];
+  }
+
+  /**
+   * Get a canonical status message for the specified code
+   *
+   * @param $code Http status code
+   * @return Text for the specified code
+   */
+  public static function getMessageForCode($code)
+  {
+    return self::$messages[$code];
+  }
+
+  /**
+   * Checks if the specified code is an error code.
+   *
+   * @param $code Http status code
+   * @return bool Answer
+   */
+  public static function isError($code)
+  {
+    return is_numeric($code) && $code >= self::HTTP_BAD_REQUEST;
+  }
+
+  /**
+   * Can the specified status code have a body?
+   *
+   * @param $code Http status code
+   * @return bool Answer
+   */
+  public static function canHaveBody($code)
+  {
+    return
+      // True if not in 100s
+      ($code < self::HTTP_CONTINUE || $code >= self::HTTP_OK)
+      && // and not 204 NO CONTENT
+      $code != self::HTTP_NO_CONTENT
+      && // and not 304 NOT MODIFIED
+      $code != self::HTTP_NOT_MODIFIED;
+  }
+
+  /**
+   * Extract the numeric code from a header
+   *
+   * @param $header an http top header
+   */
+  public static function codeFromHeader($header)
+  {
+    $matches = array();
+    preg_match('/HTTP\/\S+\s(\d+)/', $header, $matches);
+    if (count($matches) < 1)
+      throw new InvalidArgumentException("Not an http header");
+    $n = $matches[1];
+    return $n;
+  }
+}
+?>
\ No newline at end of file