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AphrontRedirectResponse.php
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Tue, Jul 16, 01:59

AphrontRedirectResponse.php
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<?php
/**
* TODO: Should be final but isn't because of AphrontReloadResponse.
*/
class AphrontRedirectResponse extends AphrontResponse {
private $uri;
private $stackWhenCreated;
private $isExternal;
public function setIsExternal($external) {
$this->isExternal = $external;
return $this;
}
public function __construct() {
if ($this->shouldStopForDebugging()) {
// If we're going to stop, capture the stack so we can print it out.
$this->stackWhenCreated = id(new Exception())->getTrace();
}
}
public function setURI($uri) {
$this->uri = $uri;
return $this;
}
public function getURI() {
// NOTE: When we convert a RedirectResponse into an AjaxResponse, we pull
// the URI through this method. Make sure it passes checks before we
// hand it over to callers.
return self::getURIForRedirect($this->uri, $this->isExternal);
}
public function shouldStopForDebugging() {
return PhabricatorEnv::getEnvConfig('debug.stop-on-redirect');
}
public function getHeaders() {
$headers = array();
if (!$this->shouldStopForDebugging()) {
$uri = self::getURIForRedirect($this->uri, $this->isExternal);
$headers[] = array('Location', $uri);
}
$headers = array_merge(parent::getHeaders(), $headers);
return $headers;
}
public function buildResponseString() {
if ($this->shouldStopForDebugging()) {
$request = $this->getRequest();
$viewer = $request->getUser();
$view = new PhabricatorStandardPageView();
$view->setRequest($this->getRequest());
$view->setApplicationName(pht('Debug'));
$view->setTitle(pht('Stopped on Redirect'));
$dialog = new AphrontDialogView();
$dialog->setUser($viewer);
$dialog->setTitle(pht('Stopped on Redirect'));
$dialog->appendParagraph(
pht(
'You were stopped here because %s is set in your configuration.',
phutil_tag('tt', array(), 'debug.stop-on-redirect')));
$dialog->appendParagraph(
pht(
'You are being redirected to: %s',
phutil_tag('tt', array(), $this->getURI())));
$dialog->addCancelButton($this->getURI(), pht('Continue'));
$dialog->appendChild(phutil_tag('br'));
$dialog->appendChild(
id(new AphrontStackTraceView())
->setUser($viewer)
->setTrace($this->stackWhenCreated));
$dialog->setIsStandalone(true);
$dialog->setWidth(AphrontDialogView::WIDTH_FULL);
$box = id(new PHUIBoxView())
->addMargin(PHUI::MARGIN_LARGE)
->appendChild($dialog);
$view->appendChild($box);
return $view->render();
}
return '';
}
/**
* Format a URI for use in a "Location:" header.
*
* Verifies that a URI redirects to the expected type of resource (local or
* remote) and formats it for use in a "Location:" header.
*
* The HTTP spec says "Location:" headers must use absolute URIs. Although
* browsers work with relative URIs, we return absolute URIs to avoid
* ambiguity. For example, Chrome interprets "Location: /\evil.com" to mean
* "perform a protocol-relative redirect to evil.com".
*
* @param string URI to redirect to.
* @param bool True if this URI identifies a remote resource.
* @return string URI for use in a "Location:" header.
*/
public static function getURIForRedirect($uri, $is_external) {
$uri_object = new PhutilURI($uri);
if ($is_external) {
// If this is a remote resource it must have a domain set. This
// would also be caught below, but testing for it explicitly first allows
// us to raise a better error message.
if (!strlen($uri_object->getDomain())) {
throw new Exception(
pht(
'Refusing to redirect to external URI "%s". This URI '.
'is not fully qualified, and is missing a domain name. To '.
'redirect to a local resource, remove the external flag.',
(string)$uri));
}
// Check that it's a valid remote resource.
if (!PhabricatorEnv::isValidURIForLink($uri)) {
throw new Exception(
pht(
'Refusing to redirect to external URI "%s". This URI '.
'is not a valid remote web resource.',
(string)$uri));
}
} else {
// If this is a local resource, it must not have a domain set. This allows
// us to raise a better error message than the check below can.
if (strlen($uri_object->getDomain())) {
throw new Exception(
pht(
'Refusing to redirect to local resource "%s". The URI has a '.
'domain, but the redirect is not marked external. Mark '.
'redirects as external to allow redirection off the local '.
'domain.',
(string)$uri));
}
// If this is a local resource, it must be a valid local resource.
if (!PhabricatorEnv::isValidLocalURIForLink($uri)) {
throw new Exception(
pht(
'Refusing to redirect to local resource "%s". This URI is not '.
'formatted in a recognizable way.',
(string)$uri));
}
// Fully qualify the result URI.
$uri = PhabricatorEnv::getURI((string)$uri);
}
return (string)$uri;
}
}

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