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AphrontRequest.php
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Sun, Feb 23, 18:31

AphrontRequest.php
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<?php
/*
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @group aphront
*/
class AphrontRequest {
const TYPE_AJAX = '__ajax__';
const TYPE_FORM = '__form__';
private $host;
private $path;
private $requestData;
private $user;
private $env;
private $applicationConfiguration;
final public function __construct($host, $path) {
$this->host = $host;
$this->path = $path;
}
final public function setApplicationConfiguration(
$application_configuration) {
$this->applicationConfiguration = $application_configuration;
return $this;
}
final public function getApplicationConfiguration() {
return $this->applicationConfiguration;
}
final public function setRequestData(array $request_data) {
$this->requestData = $request_data;
return $this;
}
final public function getPath() {
return $this->path;
}
final public function getHost() {
return $this->host;
}
final public function getInt($name, $default = null) {
if (isset($this->requestData[$name])) {
return (int)$this->requestData[$name];
} else {
return $default;
}
}
final public function getBool($name, $default = null) {
if (isset($this->requestData[$name])) {
if ($this->requestData[$name] === 'true') {
return true;
} else if ($this->requestData[$name] === 'false') {
return false;
} else {
return (bool)$this->requestData[$name];
}
} else {
return $default;
}
}
final public function getStr($name, $default = null) {
if (isset($this->requestData[$name])) {
$str = (string)$this->requestData[$name];
// Normalize newline craziness.
$str = str_replace(
array("\r\n", "\r"),
array("\n", "\n"),
$str);
return $str;
} else {
return $default;
}
}
final public function getArr($name, $default = array()) {
if (isset($this->requestData[$name]) &&
is_array($this->requestData[$name])) {
return $this->requestData[$name];
} else {
return $default;
}
}
final public function getExists($name) {
return array_key_exists($name, $this->requestData);
}
final public function isHTTPPost() {
return ($_SERVER['REQUEST_METHOD'] == 'POST');
}
final public function isAjax() {
return $this->getExists(self::TYPE_AJAX);
}
public static function getCSRFTokenName() {
return '__csrf__';
}
public static function getCSRFHeaderName() {
return 'X-Phabricator-Csrf';
}
final public function validateCSRF() {
$token_name = self::getCSRFTokenName();
$token = $this->getStr($token_name);
// No token in the request, check the HTTP header which is added for Ajax
// requests.
if (empty($token)) {
// PHP mangles HTTP headers by uppercasing them and replacing hyphens with
// underscores, then prepending 'HTTP_'.
$php_index = self::getCSRFHeaderName();
$php_index = strtoupper($php_index);
$php_index = str_replace('-', '_', $php_index);
$php_index = 'HTTP_'.$php_index;
$token = idx($_SERVER, $php_index);
}
$valid = $this->getUser()->validateCSRFToken($token);
if (!$valid) {
// Add some diagnostic details so we can figure out if some CSRF issues
// are JS problems or people accessing Ajax URIs directly with their
// browsers.
if ($token) {
$token_info = "with an invalid CSRF token";
} else {
$token_info = "without a CSRF token";
}
if ($this->isAjax()) {
$more_info = "(This was an Ajax request, {$token_info}.)";
} else {
$more_info = "(This was a web request, {$token_info}.)";
}
// This should only be able to happen if you load a form, pull your
// internet for 6 hours, and then reconnect and immediately submit,
// but give the user some indication of what happened since the workflow
// is incredibly confusing otherwise.
throw new AphrontCSRFException(
"The form you just submitted did not include a valid CSRF token. ".
"This token is a technical security measure which prevents a ".
"certain type of login hijacking attack. However, the token can ".
"become invalid if you leave a page open for more than six hours ".
"without a connection to the internet. To fix this problem: reload ".
"the page, and then resubmit it.\n\n".
$more_info);
}
return true;
}
final public function isFormPost() {
$post = $this->getExists(self::TYPE_FORM) &&
$this->isHTTPPost();
if (!$post) {
return false;
}
return $this->validateCSRF();
}
final public function getCookie($name, $default = null) {
return idx($_COOKIE, $name, $default);
}
final public function clearCookie($name) {
$this->setCookie($name, '', time() - (60 * 60 * 24 * 30));
}
final public function setCookie($name, $value, $expire = null) {
// Ensure cookies are only set on the configured domain.
$base_uri = PhabricatorEnv::getEnvConfig('phabricator.base-uri');
$base_uri = new PhutilURI($base_uri);
$base_domain = $base_uri->getDomain();
$base_protocol = $base_uri->getProtocol();
// The "Host" header may include a port number; if so, ignore it. We can't
// use PhutilURI since there's no URI scheme.
list($actual_host) = explode(':', $this->getHost(), 2);
if ($base_domain != $actual_host) {
throw new Exception(
"This install of Phabricator is configured as '{$base_domain}' but ".
"you are accessing it via '{$actual_host}'. Access Phabricator via ".
"the primary configured domain.");
}
if ($expire === null) {
$expire = time() + (60 * 60 * 24 * 365 * 5);
}
$is_secure = ($base_protocol == 'https');
setcookie(
$name,
$value,
$expire,
$path = '/',
$base_domain,
$is_secure,
$http_only = true);
}
final public function setUser($user) {
$this->user = $user;
return $this;
}
final public function getUser() {
return $this->user;
}
final public function getRequestURI() {
$get = $_GET;
unset($get['__path__']);
return id(new PhutilURI($this->getPath()))->setQueryParams($get);
}
final public function isDialogFormPost() {
return $this->isFormPost() && $this->getStr('__dialog__');
}
final public function getRemoteAddr() {
return $_SERVER['REMOTE_ADDR'];
}
}

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