mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
baea4ee2ba
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@88218 467b73ca-7a2a-4603-9d3b-597d59a354a9
285 lines
7.4 KiB
PHP
Executable File
285 lines
7.4 KiB
PHP
Executable File
<?php
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/**
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* Represenets an HTTPResponse returned by a controller.
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*
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* @package sapphire
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* @subpackage control
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*/
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class HTTPResponse extends Object {
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protected static $status_codes = array(
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100 => 'Continue',
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101 => 'Switching Protocols',
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200 => 'OK',
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201 => 'Created',
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202 => 'Accepted',
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203 => 'Non-Authoritative Information',
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204 => 'No Content',
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205 => 'Reset Content',
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206 => 'Partial Content',
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301 => 'Moved Permanently',
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302 => 'Found',
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303 => 'See Other',
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304 => 'Not Modified',
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305 => 'Use Proxy',
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307 => 'Temporary Redirect',
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400 => 'Bad Request',
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401 => 'Unauthorized',
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403 => 'Forbidden',
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404 => 'Not Found',
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405 => 'Method Not Allowed',
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406 => 'Not Acceptable',
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407 => 'Proxy Authentication Required',
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408 => 'Request Timeout',
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409 => 'Conflict',
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410 => 'Gone',
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411 => 'Length Required',
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412 => 'Precondition Failed',
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413 => 'Request Entity Too Large',
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414 => 'Request-URI Too Long',
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415 => 'Unsupported Media Type',
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416 => 'Request Range Not Satisfiable',
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417 => 'Expectation Failed',
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500 => 'Internal Server Error',
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501 => 'Not Implemented',
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502 => 'Bad Gateway',
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503 => 'Service Unavailable',
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504 => 'Gateway Timeout',
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505 => 'HTTP Version Not Supported',
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);
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protected static $redirect_codes = array(
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301,
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302,
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303,
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304,
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305,
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307
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);
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protected $statusCode = 200;
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protected $statusDescription = "OK";
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/**
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* HTTP Headers like "Content-Type: text/xml"
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*
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* @see http://en.wikipedia.org/wiki/List_of_HTTP_headers
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* @var array
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*/
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protected $headers = array(
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"Content-Type" => "text/html; charset=\"utf-8\"",
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);
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/**
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* @var string
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*/
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protected $body = null;
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/**
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* Create a new HTTP response
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* @param $body The body of the response
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* @param $statusCode The numeric status code - 200, 404, etc
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* @param $statusDescription The text to be given alongside the status code. This can be accessed by javascript
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*/
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function __construct($body = null, $statusCode = null, $statusDescription = null) {
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parent::__construct();
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$this->body = $body;
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if($statusCode) $this->setStatusCode($statusCode, $statusDescription);
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}
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function setStatusCode($code, $description = null) {
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if(isset(self::$status_codes[$code])) $this->statusCode = $code;
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else user_error("Unrecognised HTTP status code '$code'", E_USER_WARNING);
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if($description) $this->statusDescription = $description;
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else $this->statusDescription = self::$status_codes[$code];
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}
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function getStatusCode() {
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return $this->statusCode;
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}
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/**
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* @return string Description for a HTTP status code
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*/
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function getStatusDescription() {
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return $this->statusDescription;
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}
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/**
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* Returns true if this HTTP response is in error
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*/
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function isError() {
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return $this->statusCode && ($this->statusCode < 200 || $this->statusCode > 399);
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}
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function setBody($body) {
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$this->body = $body;
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}
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function getBody() {
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return $this->body;
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}
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/**
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* Add a HTTP header to the response, replacing any header of the same name.
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*
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* @param string $header Example: "Content-Type"
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* @param string $value Example: "text/xml"
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*/
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function addHeader($header, $value) {
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$this->headers[$header] = $value;
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}
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/**
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* Return the HTTP header of the given name.
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*
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* @param string $header
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* @returns string
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*/
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function getHeader($header) {
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if(isset($this->headers[$header])) {
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return $this->headers[$header];
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} else {
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return null;
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}
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}
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/**
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* @return array
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*/
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function getHeaders() {
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return $this->headers;
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}
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/**
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* Remove an existing HTTP header by its name,
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* e.g. "Content-Type".
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*
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* @param unknown_type $header
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*/
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function removeHeader($header) {
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if(isset($this->headers[$header])) unset($this->headers[$header]);
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}
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function redirect($dest, $code=302) {
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if(!in_array($code, self::$redirect_codes)) $code = 302;
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$this->statusCode = $code;
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$this->headers['Location'] = $dest;
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}
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/**
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* Send this HTTPReponse to the browser
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*/
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function output() {
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// Attach appropriate X-Include-JavaScript and X-Include-CSS headers
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if(Director::is_ajax()) {
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Requirements::include_in_response($this);
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}
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if(in_array($this->statusCode, self::$redirect_codes) && headers_sent($file, $line)) {
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$url = $this->headers['Location'];
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echo
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"<p>Redirecting to <a href=\"$url\" title=\"Please click this link if your browser does not redirect you\">$url... (output started on $file, line $line)</a></p>
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<meta http-equiv=\"refresh\" content=\"1; url=$url\" />
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<script type=\"text/javascript\">setTimeout('window.location.href = \"$url\"', 50);</script>";
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} else {
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if(!headers_sent()) {
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header($_SERVER['SERVER_PROTOCOL'] . " $this->statusCode " . $this->getStatusDescription());
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foreach($this->headers as $header => $value) {
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header("$header: $value");
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}
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}
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// Only show error pages or generic "friendly" errors if the status code signifies
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// an error, and the response doesn't have any body yet that might contain
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// a more specific error description.
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if(Director::isLive() && $this->isError() && !$this->body) {
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Debug::friendlyError($this->statusCode, $this->getStatusDescription());
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} else {
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echo $this->body;
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}
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}
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}
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/**
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* Returns true if this response is "finished", that is, no more script execution should be done.
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* Specifically, returns true if a redirect has already been requested
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*/
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function isFinished() {
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return in_array($this->statusCode, array(301, 302, 401, 403));
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}
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/**
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* Return all the links in the body as an array.
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* @returns An array of maps. Each map will contain 'id', 'class', and 'href', representing the HTML attributes of the link.
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*/
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function getLinks() {
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$attributes = array('id', 'href', 'class');
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$links = array();
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$results = array();
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preg_match_all('/<a[^>]+>/i', $this->body, $links);
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// $links[0] contains the actual matches
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foreach($links[0] as $link) {
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$processedLink = array();
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foreach($attributes as $attribute) {
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$matches = array();
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if(preg_match('/' . $attribute . '\s*=\s*"([^"]+)"/i', $link, $matches)) {
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$processedLink[$attribute] = $matches[1];
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}
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}
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$results[] = $processedLink;
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}
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return $results;
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}
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}
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/**
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* A {@link HTTPResponse} encapsulated in an exception, which can interrupt the processing flow and be caught by the
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* {@link RequestHandler} and returned to the user.
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*
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* Example Usage:
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* <code>
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* throw new HTTPResponse_Exception('This request was invalid.', 400);
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* throw new HTTPResponse_Exception(new HTTPResponse('There was an internal server error.', 500));
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* </code>
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*
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* @package sapphire
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* @subpackage control
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*/
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class HTTPResponse_Exception extends Exception {
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protected $response;
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/**
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* @see HTTPResponse::__construct();
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*/
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public function __construct($body = null, $statusCode = null, $statusDescription = null) {
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if($body instanceof HTTPResponse) {
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$this->setResponse($body);
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} else {
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$this->setResponse(new HTTPResponse($body, $statusCode, $statusDescription));
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}
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parent::__construct($this->getResponse()->getBody(), $this->getResponse()->getStatusCode());
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}
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/**
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* @return HTTPResponse
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*/
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public function getResponse() {
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return $this->response;
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}
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/**
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* @param HTTPResponse $response
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*/
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public function setResponse(HTTPResponse $response) {
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$this->response = $response;
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}
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}
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