378 lines
10 KiB
PHP
378 lines
10 KiB
PHP
<?php
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/**
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* ownCloud - Request
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*
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* @author Thomas Tanghus
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* @copyright 2013 Thomas Tanghus (thomas@tanghus.net)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OC\AppFramework\Http;
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use OCP\IRequest;
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/**
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* Class for accessing variables in the request.
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* This class provides an immutable object with request variables.
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*/
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class Request implements \ArrayAccess, \Countable, IRequest {
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protected $inputStream;
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protected $content;
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protected $items = array();
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protected $allowedKeys = array(
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'get',
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'post',
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'files',
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'server',
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'env',
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'cookies',
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'urlParams',
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'parameters',
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'method',
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'requesttoken',
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);
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/**
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* @param array $vars An associative array with the following optional values:
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* @param array 'urlParams' the parameters which were matched from the URL
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* @param array 'get' the $_GET array
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* @param array|string 'post' the $_POST array or JSON string
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* @param array 'files' the $_FILES array
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* @param array 'server' the $_SERVER array
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* @param array 'env' the $_ENV array
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* @param array 'cookies' the $_COOKIE array
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* @param string 'method' the request method (GET, POST etc)
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* @param string|false 'requesttoken' the requesttoken or false when not available
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* @see http://www.php.net/manual/en/reserved.variables.php
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*/
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public function __construct(array $vars=array(), $stream='php://input') {
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$this->inputStream = $stream;
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$this->items['params'] = array();
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if(!array_key_exists('method', $vars)) {
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$vars['method'] = 'GET';
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}
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foreach($this->allowedKeys as $name) {
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$this->items[$name] = isset($vars[$name])
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? $vars[$name]
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: array();
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}
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// 'application/json' must be decoded manually.
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if (strpos($this->getHeader('Content-Type'), 'application/json') !== false) {
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$params = json_decode(file_get_contents($this->inputStream), true);
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if(count($params) > 0) {
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$this->items['params'] = $params;
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if($vars['method'] === 'POST') {
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$this->items['post'] = $params;
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}
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}
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// Handle application/x-www-form-urlencoded for methods other than GET
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// or post correctly
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} elseif($vars['method'] !== 'GET'
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&& $vars['method'] !== 'POST'
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&& strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') !== false) {
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parse_str(file_get_contents($this->inputStream), $params);
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if(is_array($params)) {
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$this->items['params'] = $params;
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}
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}
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$this->items['parameters'] = array_merge(
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$this->items['get'],
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$this->items['post'],
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$this->items['urlParams'],
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$this->items['params']
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);
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}
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// Countable method.
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public function count() {
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return count(array_keys($this->items['parameters']));
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}
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/**
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* ArrayAccess methods
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*
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* Gives access to the combined GET, POST and urlParams arrays
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*
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* Examples:
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*
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* $var = $request['myvar'];
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*
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* or
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*
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* if(!isset($request['myvar']) {
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* // Do something
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* }
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*
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* $request['myvar'] = 'something'; // This throws an exception.
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*
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* @param string $offset The key to lookup
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* @return boolean
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*/
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public function offsetExists($offset) {
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return isset($this->items['parameters'][$offset]);
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}
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/**
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* @see offsetExists
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*/
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public function offsetGet($offset) {
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return isset($this->items['parameters'][$offset])
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? $this->items['parameters'][$offset]
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: null;
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}
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/**
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* @see offsetExists
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*/
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public function offsetSet($offset, $value) {
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throw new \RuntimeException('You cannot change the contents of the request object');
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}
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/**
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* @see offsetExists
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*/
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public function offsetUnset($offset) {
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throw new \RuntimeException('You cannot change the contents of the request object');
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}
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// Magic property accessors
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public function __set($name, $value) {
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throw new \RuntimeException('You cannot change the contents of the request object');
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}
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/**
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* Access request variables by method and name.
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* Examples:
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*
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* $request->post['myvar']; // Only look for POST variables
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* $request->myvar; or $request->{'myvar'}; or $request->{$myvar}
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* Looks in the combined GET, POST and urlParams array.
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*
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* If you access e.g. ->post but the current HTTP request method
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* is GET a \LogicException will be thrown.
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*
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* @param string $name The key to look for.
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* @throws \LogicException
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* @return mixed|null
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*/
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public function __get($name) {
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switch($name) {
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case 'put':
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case 'patch':
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case 'get':
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case 'post':
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if($this->method !== strtoupper($name)) {
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throw new \LogicException(sprintf('%s cannot be accessed in a %s request.', $name, $this->method));
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}
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case 'files':
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case 'server':
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case 'env':
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case 'cookies':
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case 'parameters':
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case 'params':
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case 'urlParams':
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if(in_array($name, array('put', 'patch'))) {
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return $this->getContent($name);
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} else {
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return isset($this->items[$name])
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? $this->items[$name]
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: null;
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}
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break;
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case 'method':
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return $this->items['method'];
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break;
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default;
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return isset($this[$name])
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? $this[$name]
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: null;
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break;
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}
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}
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public function __isset($name) {
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return isset($this->items['parameters'][$name]);
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}
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public function __unset($id) {
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throw new \RunTimeException('You cannot change the contents of the request object');
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}
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/**
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* Returns the value for a specific http header.
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*
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* This method returns null if the header did not exist.
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*
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* @param string $name
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* @return string
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*/
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public function getHeader($name) {
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$name = strtoupper(str_replace(array('-'),array('_'),$name));
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if (isset($this->server['HTTP_' . $name])) {
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return $this->server['HTTP_' . $name];
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}
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// There's a few headers that seem to end up in the top-level
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// server array.
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switch($name) {
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case 'CONTENT_TYPE' :
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case 'CONTENT_LENGTH' :
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if (isset($this->server[$name])) {
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return $this->server[$name];
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}
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break;
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}
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return null;
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}
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/**
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* Lets you access post and get parameters by the index
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* In case of json requests the encoded json body is accessed
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*
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* @param string $key the key which you want to access in the URL Parameter
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* placeholder, $_POST or $_GET array.
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* The priority how they're returned is the following:
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* 1. URL parameters
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* 2. POST parameters
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* 3. GET parameters
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* @param mixed $default If the key is not found, this value will be returned
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* @return mixed the content of the array
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*/
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public function getParam($key, $default = null) {
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return isset($this->parameters[$key])
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? $this->parameters[$key]
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: $default;
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}
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/**
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* Returns all params that were received, be it from the request
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* (as GET or POST) or throuh the URL by the route
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* @return array the array with all parameters
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*/
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public function getParams() {
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return $this->parameters;
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}
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/**
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* Returns the method of the request
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* @return string the method of the request (POST, GET, etc)
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*/
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public function getMethod() {
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return $this->method;
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}
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/**
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* Shortcut for accessing an uploaded file through the $_FILES array
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* @param string $key the key that will be taken from the $_FILES array
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* @return array the file in the $_FILES element
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*/
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public function getUploadedFile($key) {
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return isset($this->files[$key]) ? $this->files[$key] : null;
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}
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/**
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* Shortcut for getting env variables
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* @param string $key the key that will be taken from the $_ENV array
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* @return array the value in the $_ENV element
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*/
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public function getEnv($key) {
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return isset($this->env[$key]) ? $this->env[$key] : null;
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}
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/**
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* Shortcut for getting cookie variables
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* @param string $key the key that will be taken from the $_COOKIE array
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* @return array the value in the $_COOKIE element
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*/
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function getCookie($key) {
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return isset($this->cookies[$key]) ? $this->cookies[$key] : null;
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}
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/**
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* Returns the request body content.
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*
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* If the HTTP request method is PUT and the body
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* not application/x-www-form-urlencoded or application/json a stream
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* resource is returned, otherwise an array.
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*
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* @return array|string|resource The request body content or a resource to read the body stream.
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*
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* @throws \LogicException
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*/
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protected function getContent() {
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// If the content can't be parsed into an array then return a stream resource.
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if ($this->method === 'PUT'
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&& strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') === false
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&& strpos($this->getHeader('Content-Type'), 'application/json') === false
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) {
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if ($this->content === false) {
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throw new \LogicException(
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'"put" can only be accessed once if not '
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. 'application/x-www-form-urlencoded or application/json.'
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);
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}
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$this->content = false;
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return fopen($this->inputStream, 'rb');
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} else {
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return $this->parameters;
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}
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}
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/**
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* Checks if the CSRF check was correct
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* @return bool true if CSRF check passed
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* @see OC_Util::$callLifespan
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* @see OC_Util::callRegister()
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*/
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public function passesCSRFCheck() {
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if($this->items['requesttoken'] === false) {
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return false;
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}
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if (isset($this->items['get']['requesttoken'])) {
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$token = $this->items['get']['requesttoken'];
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} elseif (isset($this->items['post']['requesttoken'])) {
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$token = $this->items['post']['requesttoken'];
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} elseif (isset($this->items['server']['HTTP_REQUESTTOKEN'])) {
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$token = $this->items['server']['HTTP_REQUESTTOKEN'];
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} else {
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//no token found.
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return false;
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}
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// Check if the token is valid
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if($token !== $this->items['requesttoken']) {
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// Not valid
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return false;
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} else {
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// Valid token
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return true;
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}
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}}
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