<?php
namespace OAuth2;
/**
* Class to handle OAuth2 Responses in a graceful way. Use this interface
* to output the proper OAuth2 responses.
*
* @see OAuth2\ResponseInterface
*
* This class borrows heavily from the Symfony2 Framework and is part of the symfony package
* @see Symfony\Component\HttpFoundation\Request (https://github.com/symfony/symfony)
*/
class Response implements ResponseInterface
{
public $version;
protected $statusCode = 200;
protected $statusText;
protected $parameters = array();
protected $httpHeaders = array();
public static $statusTexts = array(
100 => 'Continue',
101 => 'Switching Protocols',
200 => 'OK',
201 => 'Created',
202 => 'Accepted',
203 => 'Non-Authoritative Information',
204 => 'No Content',
205 => 'Reset Content',
206 => 'Partial Content',
300 => 'Multiple Choices',
301 => 'Moved Permanently',
302 => 'Found',
303 => 'See Other',
304 => 'Not Modified',
305 => 'Use Proxy',
307 => 'Temporary Redirect',
400 => 'Bad Request',
401 => 'Unauthorized',
402 => 'Payment Required',
403 => 'Forbidden',
404 => 'Not Found',
405 => 'Method Not Allowed',
406 => 'Not Acceptable',
407 => 'Proxy Authentication Required',
408 => 'Request Timeout',
409 => 'Conflict',
410 => 'Gone',
411 => 'Length Required',
412 => 'Precondition Failed',
413 => 'Request Entity Too Large',
414 => 'Request-URI Too Long',
415 => 'Unsupported Media Type',
416 => 'Requested Range Not Satisfiable',
417 => 'Expectation Failed',
418 => 'I\'m a teapot',
500 => 'Internal Server Error',
501 => 'Not Implemented',
502 => 'Bad Gateway',
503 => 'Service Unavailable',
504 => 'Gateway Timeout',
505 => 'HTTP Version Not Supported',
);
public function __construct($parameters = array(), $statusCode = 200, $headers = array())
{
$this->setParameters($parameters);
$this->setStatusCode($statusCode);
$this->setHttpHeaders($headers);
$this->version = '1.1';
}
/**
* Converts the response object to string containing all headers and the response content.
*
* @return string The response with headers and content
*/
public function __toString()
{
$headers = array();
foreach ($this->httpHeaders as $name => $value) {
$headers[$name] = (array) $value;
}
return
sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText)."\r\n".
$this->getHttpHeadersAsString($headers)."\r\n".
$this->getResponseBody();
}
/**
* Returns the build header line.
*
* @param string $name The header name
* @param string $value The header value
*
* @return string The built header line
*/
protected function buildHeader($name, $value)
{
return sprintf("%s: %s\n", $name, $value);
}
public function getStatusCode()
{
return $this->statusCode;
}
public function setStatusCode($statusCode, $text = null)
{
$this->statusCode = (int) $statusCode;
if ($this->isInvalid()) {
throw new \InvalidArgumentException(sprintf('The HTTP status code "%s" is not valid.', $statusCode));
}
$this->statusText = false === $text ? '' : (null === $text ? self::$statusTexts[$this->statusCode] : $text);
}
public function getStatusText()
{
return $this->statusText;
}
public function getParameters()
{
return $this->parameters;
}
public function setParameters(array $parameters)
{
$this->parameters = $parameters;
}
public function addParameters(array $parameters)
{
$this->parameters = array_merge($this->parameters, $parameters);
}
public function getParameter($name, $default = null)
{
return isset($this->parameters[$name]) ? $this->parameters[$name] : $default;
}
public function setParameter($name, $value)
{
$this->parameters[$name] = $value;
}
public function setHttpHeaders(array $httpHeaders)
{
$this->httpHeaders = $httpHeaders;
}
public function setHttpHeader($name, $value)
{
$this->httpHeaders[$name] = $value;
}
public function addHttpHeaders(array $httpHeaders)
{
$this->httpHeaders = array_merge($this->httpHeaders, $httpHeaders);
}
public function getHttpHeaders()
{
return $this->httpHeaders;
}
public function getHttpHeader($name, $default = null)
{
return isset($this->httpHeaders[$name]) ? $this->httpHeaders[$name] : $default;
}
public function getResponseBody($format = 'json')
{
switch ($format) {
case 'json':
return json_encode($this->parameters);
case 'xml':
// this only works for single-level arrays
$xml = new \SimpleXMLElement('<response/>');
foreach ($this->parameters as $key => $param) {
$xml->addChild($key, $param);
}
return $xml->asXML();
}
throw new \InvalidArgumentException(sprintf('The format %s is not supported', $format));
}
public function send($format = 'json')
{
// headers have already been sent by the developer
if (headers_sent()) {
return;
}
switch ($format) {
case 'json':
$this->setHttpHeader('Content-Type', 'application/json');
break;
case 'xml':
$this->setHttpHeader('Content-Type', 'text/xml');
break;
}
// status
header(sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText));
foreach ($this->getHttpHeaders() as $name => $header) {
header(sprintf('%s: %s', $name, $header));
}
echo $this->getResponseBody($format);
}
public function setError($statusCode, $error, $errorDescription = null, $errorUri = null)
{
$parameters = array(
'error' => $error,
'error_description' => $errorDescription,
);
if (!is_null($errorUri)) {
if (strlen($errorUri) > 0 && $errorUri[0] == '#') {
// we are referencing an oauth bookmark (for brevity)
$errorUri = 'http://tools.ietf.org/html/rfc6749' . $errorUri;
}
$parameters['error_uri'] = $errorUri;
}
$httpHeaders = array(
'Cache-Control' => 'no-store'
);
$this->setStatusCode($statusCode);
$this->addParameters($parameters);
$this->addHttpHeaders($httpHeaders);
if (!$this->isClientError() && !$this->isServerError()) {
throw new \InvalidArgumentException(sprintf('The HTTP status code is not an error ("%s" given).', $statusCode));
}
}
public function setRedirect($statusCode, $url, $state = null, $error = null, $errorDescription = null, $errorUri = null)
{
if (empty($url)) {
throw new \InvalidArgumentException('Cannot redirect to an empty URL.');
}
$parameters = array();
if (!is_null($state)) {
$parameters['state'] = $state;
}
if (!is_null($error)) {
$this->setError(400, $error, $errorDescription, $errorUri);
}
$this->setStatusCode($statusCode);
$this->addParameters($parameters);
if (count($this->parameters) > 0) {
// add parameters to URL redirection
$parts = parse_url($url);
$sep = isset($parts['query']) && count($parts['query']) > 0 ? '&' : '?';
$url .= $sep . http_build_query($this->parameters);
}
$this->addHttpHeaders(array('Location' => $url));
if (!$this->isRedirection()) {
throw new \InvalidArgumentException(sprintf('The HTTP status code is not a redirect ("%s" given).', $statusCode));
}
}
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
/**
* @return Boolean
*
* @api
*/
public function isInvalid()
{
return $this->statusCode < 100 || $this->statusCode >= 600;
}
/**
* @return Boolean
*
* @api
*/
public function isInformational()
{
return $this->statusCode >= 100 && $this->statusCode < 200;
}
/**
* @return Boolean
*
* @api
*/
public function isSuccessful()
{
return $this->statusCode >= 200 && $this->statusCode < 300;
}
/**
* @return Boolean
*
* @api
*/
public function isRedirection()
{
return $this->statusCode >= 300 && $this->statusCode < 400;
}
/**
* @return Boolean
*
* @api
*/
public function isClientError()
{
return $this->statusCode >= 400 && $this->statusCode < 500;
}
/**
* @return Boolean
*
* @api
*/
public function isServerError()
{
return $this->statusCode >= 500 && $this->statusCode < 600;
}
/*
* Functions from Symfony2 HttpFoundation - output pretty header
*/
private function getHttpHeadersAsString($headers)
{
if (count($headers) == 0) {
return '';
}
$max = max(array_map('strlen', array_keys($headers))) + 1;
$content = '';
ksort($headers);
foreach ($headers as $name => $values) {
foreach ($values as $value) {
$content .= sprintf("%-{$max}s %s\r\n", $this->beautifyHeaderName($name).':', $value);
}
}
return $content;
}
private function beautifyHeaderName($name)
{
return preg_replace_callback('/\-(.)/', array($this, 'beautifyCallback'), ucfirst($name));
}
private function beautifyCallback($match)
{
return '-'.strtoupper($match[1]);
}
}
