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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\BrowserKit;
use Symfony\Component\DomCrawler\Crawler;
use Symfony\Component\DomCrawler\Link;
use Symfony\Component\DomCrawler\Form;
use Symfony\Component\Process\PhpProcess;
/**
* Client simulates a browser.
*
* To make the actual request, you need to implement the doRequest() method.
*
* If you want to be able to run requests in their own process (insulated flag),
* you need to also implement the getScript() method.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
abstract class Client
{
protected $history;
protected $cookieJar;
protected $server = array();
protected $internalRequest;
protected $request;
protected $internalResponse;
protected $response;
protected $crawler;
protected $insulated = false;
protected $redirect;
protected $followRedirects = true;
private $maxRedirects = -1;
private $redirectCount = 0;
private $isMainRequest = true;
/**
* Constructor.
*
* @param array $server The server parameters (equivalent of $_SERVER)
* @param History $history A History instance to store the browser history
* @param CookieJar $cookieJar A CookieJar instance to store the cookies
*/
public function __construct(array $server = array(), History $history = null, CookieJar $cookieJar = null)
{
$this->setServerParameters($server);
$this->history = $history ?: new History();
$this->cookieJar = $cookieJar ?: new CookieJar();
}
/**
* Sets whether to automatically follow redirects or not.
*
* @param bool $followRedirect Whether to follow redirects
*/
public function followRedirects($followRedirect = true)
{
$this->followRedirects = (bool) $followRedirect;
}
/**
* Returns whether client automatically follows redirects or not.
*
* @return bool
*/
public function isFollowingRedirects()
{
return $this->followRedirects;
}
/**
* Sets the maximum number of requests that crawler can follow.
*
* @param int $maxRedirects
*/
public function setMaxRedirects($maxRedirects)
{
$this->maxRedirects = $maxRedirects < 0 ? -1 : $maxRedirects;
$this->followRedirects = -1 != $this->maxRedirects;
}
/**
* Returns the maximum number of requests that crawler can follow.
*
* @return int
*/
public function getMaxRedirects()
{
return $this->maxRedirects;
}
/**
* Sets the insulated flag.
*
* @param bool $insulated Whether to insulate the requests or not
*
* @throws \RuntimeException When Symfony Process Component is not installed
*/
public function insulate($insulated = true)
{
if ($insulated && !class_exists('Symfony\\Component\\Process\\Process')) {
throw new \RuntimeException('Unable to isolate requests as the Symfony Process Component is not installed.');
}
$this->insulated = (bool) $insulated;
}
/**
* Sets server parameters.
*
* @param array $server An array of server parameters
*/
public function setServerParameters(array $server)
{
$this->server = array_merge(array(
'HTTP_USER_AGENT' => 'Symfony2 BrowserKit',
), $server);
}
/**
* Sets single server parameter.
*
* @param string $key A key of the parameter
* @param string $value A value of the parameter
*/
public function setServerParameter($key, $value)
{
$this->server[$key] = $value;
}
/**
* Gets single server parameter for specified key.
*
* @param string $key A key of the parameter to get
* @param string $default A default value when key is undefined
*
* @return string A value of the parameter
*/
public function getServerParameter($key, $default = '')
{
return isset($this->server[$key]) ? $this->server[$key] : $default;
}
/**
* Returns the History instance.
*
* @return History A History instance
*/
public function getHistory()
{
return $this->history;
}
/**
* Returns the CookieJar instance.
*
* @return CookieJar A CookieJar instance
*/
public function getCookieJar()
{
return $this->cookieJar;
}
/**
* Returns the current Crawler instance.
*
* @return Crawler|null A Crawler instance
*/
public function getCrawler()
{
return $this->crawler;
}
/**
* Returns the current BrowserKit Response instance.
*
* @return Response|null A BrowserKit Response instance
*/
public function getInternalResponse()
{
return $this->internalResponse;
}
/**
* Returns the current origin response instance.
*
* The origin response is the response instance that is returned
* by the code that handles requests.
*
* @return object|null A response instance
*
* @see doRequest()
*/
public function getResponse()
{
return $this->response;
}
/**
* Returns the current BrowserKit Request instance.
*
* @return Request|null A BrowserKit Request instance
*/
public function getInternalRequest()
{
return $this->internalRequest;
}
/**
* Returns the current origin Request instance.
*
* The origin request is the request instance that is sent
* to the code that handles requests.
*
* @return object|null A Request instance
*
* @see doRequest()
*/
public function getRequest()
{
return $this->request;
}
/**
* Clicks on a given link.
*
* @param Link $link A Link instance
*
* @return Crawler
*/
public function click(Link $link)
{
if ($link instanceof Form) {
return $this->submit($link);
}
return $this->request($link->getMethod(), $link->getUri());
}
/**
* Submits a form.
*
* @param Form $form A Form instance
* @param array $values An array of form field values
*
* @return Crawler
*/
public function submit(Form $form, array $values = array())
{
$form->setValues($values);
return $this->request($form->getMethod(), $form->getUri(), $form->getPhpValues(), $form->getPhpFiles());
}
/**
* Calls a URI.
*
* @param string $method The request method
* @param string $uri The URI to fetch
* @param array $parameters The Request parameters
* @param array $files The files
* @param array $server The server parameters (HTTP headers are referenced with a HTTP_ prefix as PHP does)
* @param string $content The raw body data
* @param bool $changeHistory Whether to update the history or not (only used internally for back(), forward(), and reload())
*
* @return Crawler
*/
public function request($method, $uri, array $parameters = array(), array $files = array(), array $server = array(), $content = null, $changeHistory = true)
{
if ($this->isMainRequest) {
$this->redirectCount = 0;
} else {
++$this->redirectCount;
}
$uri = $this->getAbsoluteUri($uri);
$server = array_merge($this->server, $server);
if (isset($server['HTTPS'])) {
$uri = preg_replace('{^'.parse_url($uri, PHP_URL_SCHEME).'}', $server['HTTPS'] ? 'https' : 'http', $uri);
}
if (!$this->history->isEmpty()) {
$server['HTTP_REFERER'] = $this->history->current()->getUri();
}
if (empty($server['HTTP_HOST'])) {
$server['HTTP_HOST'] = $this->extractHost($uri);
}
$server['HTTPS'] = 'https' == parse_url($uri, PHP_URL_SCHEME);
$this->internalRequest = new Request($uri, $method, $parameters, $files, $this->cookieJar->allValues($uri), $server, $content);
$this->request = $this->filterRequest($this->internalRequest);
if (true === $changeHistory) {
$this->history->add($this->internalRequest);
}
if ($this->insulated) {
$this->response = $this->doRequestInProcess($this->request);
} else {
$this->response = $this->doRequest($this->request);
}
$this->internalResponse = $this->filterResponse($this->response);
$this->cookieJar->updateFromResponse($this->internalResponse, $uri);
$status = $this->internalResponse->getStatus();
if ($status >= 300 && $status < 400) {
$this->redirect = $this->internalResponse->getHeader('Location');
} else {
$this->redirect = null;
}
if ($this->followRedirects && $this->redirect) {
return $this->crawler = $this->followRedirect();
}
return $this->crawler = $this->createCrawlerFromContent($this->internalRequest->getUri(), $this->internalResponse->getContent(), $this->internalResponse->getHeader('Content-Type'));
}
/**
* Makes a request in another process.
*
* @param object $request An origin request instance
*
* @return object An origin response instance
*
* @throws \RuntimeException When processing returns exit code
*/
protected function doRequestInProcess($request)
{
$process = new PhpProcess($this->getScript($request), null, null);
$process->run();
if (!$process->isSuccessful() || !preg_match('/^O\:\d+\:/', $process->getOutput())) {
throw new \RuntimeException(sprintf('OUTPUT: %s ERROR OUTPUT: %s', $process->getOutput(), $process->getErrorOutput()));
}
return unserialize($process->getOutput());
}
/**
* Makes a request.
*
* @param object $request An origin request instance
*
* @return object An origin response instance
*/
abstract protected function doRequest($request);
/**
* Returns the script to execute when the request must be insulated.
*
* @param object $request An origin request instance
*
* @throws \LogicException When this abstract class is not implemented
*/
protected function getScript($request)
{
throw new \LogicException('To insulate requests, you need to override the getScript() method.');
}
/**
* Filters the BrowserKit request to the origin one.
*
* @param Request $request The BrowserKit Request to filter
*
* @return object An origin request instance
*/
protected function filterRequest(Request $request)
{
return $request;
}
/**
* Filters the origin response to the BrowserKit one.
*
* @param object $response The origin response to filter
*
* @return Response An BrowserKit Response instance
*/
protected function filterResponse($response)
{
return $response;
}
/**
* Creates a crawler.
*
* This method returns null if the DomCrawler component is not available.
*
* @param string $uri A URI
* @param string $content Content for the crawler to use
* @param string $type Content type
*
* @return Crawler|null
*/
protected function createCrawlerFromContent($uri, $content, $type)
{
if (!class_exists('Symfony\Component\DomCrawler\Crawler')) {
return;
}
$crawler = new Crawler(null, $uri);
$crawler->addContent($content, $type);
return $crawler;
}
/**
* Goes back in the browser history.
*
* @return Crawler
*/
public function back()
{
return $this->requestFromRequest($this->history->back(), false);
}
/**
* Goes forward in the browser history.
*
* @return Crawler
*/
public function forward()
{
return $this->requestFromRequest($this->history->forward(), false);
}
/**
* Reloads the current browser.
*
* @return Crawler
*/
public function reload()
{
return $this->requestFromRequest($this->history->current(), false);
}
/**
* Follow redirects?
*
* @return Crawler
*
* @throws \LogicException If request was not a redirect
*/
public function followRedirect()
{
if (empty($this->redirect)) {
throw new \LogicException('The request was not redirected.');
}
if (-1 !== $this->maxRedirects) {
if ($this->redirectCount > $this->maxRedirects) {
throw new \LogicException(sprintf('The maximum number (%d) of redirections was reached.', $this->maxRedirects));
}
}
$request = $this->internalRequest;
if (in_array($this->internalResponse->getStatus(), array(302, 303))) {
$method = 'GET';
$files = array();
$content = null;
} else {
$method = $request->getMethod();
$files = $request->getFiles();
$content = $request->getContent();
}
if ('GET' === strtoupper($method)) {
// Don't forward parameters for GET request as it should reach the redirection URI
$parameters = array();
} else {
$parameters = $request->getParameters();
}
$server = $request->getServer();
$server = $this->updateServerFromUri($server, $this->redirect);
$this->isMainRequest = false;
$response = $this->request($method, $this->redirect, $parameters, $files, $server, $content);
$this->isMainRequest = true;
return $response;
}
/**
* Restarts the client.
*
* It flushes history and all cookies.
*/
public function restart()
{
$this->cookieJar->clear();
$this->history->clear();
}
/**
* Takes a URI and converts it to absolute if it is not already absolute.
*
* @param string $uri A URI
*
* @return string An absolute URI
*/
protected function getAbsoluteUri($uri)
{
// already absolute?
if (0 === strpos($uri, 'http://') || 0 === strpos($uri, 'https://')) {
return $uri;
}
if (!$this->history->isEmpty()) {
$currentUri = $this->history->current()->getUri();
} else {
$currentUri = sprintf('http%s://%s/',
isset($this->server['HTTPS']) ? 's' : '',
isset($this->server['HTTP_HOST']) ? $this->server['HTTP_HOST'] : 'localhost'
);
}
// protocol relative URL
if (0 === strpos($uri, '//')) {
return parse_url($currentUri, PHP_URL_SCHEME).':'.$uri;
}
// anchor or query string parameters?
if (!$uri || '#' == $uri[0] || '?' == $uri[0]) {
return preg_replace('/[#?].*?$/', '', $currentUri).$uri;
}
if ('/' !== $uri[0]) {
$path = parse_url($currentUri, PHP_URL_PATH);
if ('/' !== substr($path, -1)) {
$path = substr($path, 0, strrpos($path, '/') + 1);
}
$uri = $path.$uri;
}
return preg_replace('#^(.*?//[^/]+)\/.*$#', '$1', $currentUri).$uri;
}
/**
* Makes a request from a Request object directly.
*
* @param Request $request A Request instance
* @param bool $changeHistory Whether to update the history or not (only used internally for back(), forward(), and reload())
*
* @return Crawler
*/
protected function requestFromRequest(Request $request, $changeHistory = true)
{
return $this->request($request->getMethod(), $request->getUri(), $request->getParameters(), $request->getFiles(), $request->getServer(), $request->getContent(), $changeHistory);
}
private function updateServerFromUri($server, $uri)
{
$server['HTTP_HOST'] = $this->extractHost($uri);
$scheme = parse_url($uri, PHP_URL_SCHEME);
$server['HTTPS'] = null === $scheme ? $server['HTTPS'] : 'https' == $scheme;
unset($server['HTTP_IF_NONE_MATCH'], $server['HTTP_IF_MODIFIED_SINCE']);
return $server;
}
private function extractHost($uri)
{
$host = parse_url($uri, PHP_URL_HOST);
if ($port = parse_url($uri, PHP_URL_PORT)) {
return $host.':'.$port;
}
return $host;
}
}