'Continue',
101 => 'Switching Protocols',
200 => 'OK',
201 => 'Created',
202 => 'Accepted',
203 => 'Non-Authoritative Information',
204 => 'No Content',
205 => 'Reset Content',
206 => 'Partial Content',
301 => 'Moved Permanently',
302 => 'Found',
303 => 'See Other',
304 => 'Not Modified',
305 => 'Use Proxy',
307 => 'Temporary Redirect',
400 => 'Bad Request',
401 => 'Unauthorized',
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 => 'Request Range Not Satisfiable',
417 => 'Expectation Failed',
500 => 'Internal Server Error',
501 => 'Not Implemented',
502 => 'Bad Gateway',
503 => 'Service Unavailable',
504 => 'Gateway Timeout',
505 => 'HTTP Version Not Supported',
);
protected static $redirect_codes = array(
301,
302,
303,
304,
305,
307
);
protected $statusCode = 200;
/**
* HTTP Headers like "Content-Type: text/xml"
*
* @see http://en.wikipedia.org/wiki/List_of_HTTP_headers
* @var array
*/
protected $headers = array();
/**
* @var string
*/
protected $body = null;
function setStatusCode($code) {
if(isset(self::$status_codes[$code])) $this->statusCode = $code;
else user_error("Unrecognised HTTP status code '$code'", E_USER_WARNING);
}
function getStatusCode() {
return $this->statusCode;
}
function setBody($body) {
$this->body = $body;
}
function getBody() {
return $this->body;
}
/**
* Add a HTTP header to the response, replacing any header of the same name.
*
* @param string $header Example: "Content-Type"
* @param string $value Example: "text/xml"
*/
function addHeader($header, $value) {
$this->headers[$header] = $value;
}
/**
* Return the HTTP header of the given name.
*
* @param string $header
* @returns string
*/
function getHeader($header) {
if(isset($this->headers[$header])) {
return $this->headers[$header];
} else {
return null;
}
}
/**
* @return array
*/
function getHeaders() {
return $this->headers;
}
/**
* Remove an existing HTTP header by its name,
* e.g. "Content-Type".
*
* @param unknown_type $header
*/
function removeHeader($header) {
if(isset($this->headers[$header])) unset($this->headers[$header]);
}
function redirect($dest, $code=302) {
if(!in_array($code, self::$redirect_codes)) $code = 302;
$this->statusCode = $code;
$this->headers['Location'] = $dest;
}
/**
* Send this HTTPReponse to the browser
*/
function output() {
if(in_array($this->statusCode, self::$redirect_codes) && headers_sent($file, $line)) {
$url = $this->headers['Location'];
echo
"Redirecting to $url... (output started on $file, line $line)
";
} else {
if(!headers_sent()) {
header("HTTP/1.1 $this->statusCode " . self::$status_codes[$this->statusCode]);
foreach($this->headers as $header => $value) {
header("$header: $value");
}
}
echo $this->body;
}
}
/**
* Returns true if this response is "finished", that is, no more script execution should be done.
* Specifically, returns true if a redirect has already been requested
*/
function isFinished() {
return $this->statusCode == 302 || $this->statusCode == 301;
}
/**
* Return all the links in the body as an array.
* @returns An array of maps. Each map will contain 'id', 'class', and 'href', representing the HTML attributes of the link.
*/
function getLinks() {
$attributes = array('id', 'href', 'class');
$links = array();
$results = array();
preg_match_all('/]+>/i', $this->body, $links);
// $links[0] contains the actual matches
foreach($links[0] as $link) {
$processedLink = array();
foreach($attributes as $attribute) {
$matches = array();
if(preg_match('/' . $attribute . '\s*=\s*"([^"]+)"/i', $link, $matches)) {
$processedLink[$attribute] = $matches[1];
}
}
$results[] = $processedLink;
}
return $results;
}
}