nextcloud/lib/private/appframework/http/request.php

380 lines
10 KiB
PHP

<?php
/**
* ownCloud - Request
*
* @author Thomas Tanghus
* @author Bernhard Posselt
* @copyright 2013 Thomas Tanghus (thomas@tanghus.net)
* @copyright 2014 Bernhard Posselt <dev@bernhard-posselt.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\AppFramework\Http;
use OCP\IRequest;
/**
* Class for accessing variables in the request.
* This class provides an immutable object with request variables.
*/
class Request implements \ArrayAccess, \Countable, IRequest {
protected $inputStream;
protected $content;
protected $items = array();
protected $allowedKeys = array(
'get',
'post',
'files',
'server',
'env',
'cookies',
'urlParams',
'parameters',
'method',
'requesttoken',
);
/**
* @param array $vars An associative array with the following optional values:
* @param array 'urlParams' the parameters which were matched from the URL
* @param array 'get' the $_GET array
* @param array|string 'post' the $_POST array or JSON string
* @param array 'files' the $_FILES array
* @param array 'server' the $_SERVER array
* @param array 'env' the $_ENV array
* @param array 'cookies' the $_COOKIE array
* @param string 'method' the request method (GET, POST etc)
* @param string|false 'requesttoken' the requesttoken or false when not available
* @see http://www.php.net/manual/en/reserved.variables.php
*/
public function __construct(array $vars=array(), $stream='php://input') {
$this->inputStream = $stream;
$this->items['params'] = array();
if(!array_key_exists('method', $vars)) {
$vars['method'] = 'GET';
}
foreach($this->allowedKeys as $name) {
$this->items[$name] = isset($vars[$name])
? $vars[$name]
: array();
}
// 'application/json' must be decoded manually.
if (strpos($this->getHeader('Content-Type'), 'application/json') !== false) {
$params = json_decode(file_get_contents($this->inputStream), true);
if(count($params) > 0) {
$this->items['params'] = $params;
if($vars['method'] === 'POST') {
$this->items['post'] = $params;
}
}
// Handle application/x-www-form-urlencoded for methods other than GET
// or post correctly
} elseif($vars['method'] !== 'GET'
&& $vars['method'] !== 'POST'
&& strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') !== false) {
parse_str(file_get_contents($this->inputStream), $params);
if(is_array($params)) {
$this->items['params'] = $params;
}
}
$this->items['parameters'] = array_merge(
$this->items['get'],
$this->items['post'],
$this->items['urlParams'],
$this->items['params']
);
}
// Countable method.
public function count() {
return count(array_keys($this->items['parameters']));
}
/**
* ArrayAccess methods
*
* Gives access to the combined GET, POST and urlParams arrays
*
* Examples:
*
* $var = $request['myvar'];
*
* or
*
* if(!isset($request['myvar']) {
* // Do something
* }
*
* $request['myvar'] = 'something'; // This throws an exception.
*
* @param string $offset The key to lookup
* @return boolean
*/
public function offsetExists($offset) {
return isset($this->items['parameters'][$offset]);
}
/**
* @see offsetExists
*/
public function offsetGet($offset) {
return isset($this->items['parameters'][$offset])
? $this->items['parameters'][$offset]
: null;
}
/**
* @see offsetExists
*/
public function offsetSet($offset, $value) {
throw new \RuntimeException('You cannot change the contents of the request object');
}
/**
* @see offsetExists
*/
public function offsetUnset($offset) {
throw new \RuntimeException('You cannot change the contents of the request object');
}
// Magic property accessors
public function __set($name, $value) {
throw new \RuntimeException('You cannot change the contents of the request object');
}
/**
* Access request variables by method and name.
* Examples:
*
* $request->post['myvar']; // Only look for POST variables
* $request->myvar; or $request->{'myvar'}; or $request->{$myvar}
* Looks in the combined GET, POST and urlParams array.
*
* If you access e.g. ->post but the current HTTP request method
* is GET a \LogicException will be thrown.
*
* @param string $name The key to look for.
* @throws \LogicException
* @return mixed|null
*/
public function __get($name) {
switch($name) {
case 'put':
case 'patch':
case 'get':
case 'post':
if($this->method !== strtoupper($name)) {
throw new \LogicException(sprintf('%s cannot be accessed in a %s request.', $name, $this->method));
}
case 'files':
case 'server':
case 'env':
case 'cookies':
case 'parameters':
case 'params':
case 'urlParams':
if(in_array($name, array('put', 'patch'))) {
return $this->getContent($name);
} else {
return isset($this->items[$name])
? $this->items[$name]
: null;
}
break;
case 'method':
return $this->items['method'];
break;
default;
return isset($this[$name])
? $this[$name]
: null;
break;
}
}
public function __isset($name) {
return isset($this->items['parameters'][$name]);
}
public function __unset($id) {
throw new \RunTimeException('You cannot change the contents of the request object');
}
/**
* Returns the value for a specific http header.
*
* This method returns null if the header did not exist.
*
* @param string $name
* @return string
*/
public function getHeader($name) {
$name = strtoupper(str_replace(array('-'),array('_'),$name));
if (isset($this->server['HTTP_' . $name])) {
return $this->server['HTTP_' . $name];
}
// There's a few headers that seem to end up in the top-level
// server array.
switch($name) {
case 'CONTENT_TYPE' :
case 'CONTENT_LENGTH' :
if (isset($this->server[$name])) {
return $this->server[$name];
}
break;
}
return null;
}
/**
* Lets you access post and get parameters by the index
* In case of json requests the encoded json body is accessed
*
* @param string $key the key which you want to access in the URL Parameter
* placeholder, $_POST or $_GET array.
* The priority how they're returned is the following:
* 1. URL parameters
* 2. POST parameters
* 3. GET parameters
* @param mixed $default If the key is not found, this value will be returned
* @return mixed the content of the array
*/
public function getParam($key, $default = null) {
return isset($this->parameters[$key])
? $this->parameters[$key]
: $default;
}
/**
* Returns all params that were received, be it from the request
* (as GET or POST) or throuh the URL by the route
* @return array the array with all parameters
*/
public function getParams() {
return $this->parameters;
}
/**
* Returns the method of the request
* @return string the method of the request (POST, GET, etc)
*/
public function getMethod() {
return $this->method;
}
/**
* Shortcut for accessing an uploaded file through the $_FILES array
* @param string $key the key that will be taken from the $_FILES array
* @return array the file in the $_FILES element
*/
public function getUploadedFile($key) {
return isset($this->files[$key]) ? $this->files[$key] : null;
}
/**
* Shortcut for getting env variables
* @param string $key the key that will be taken from the $_ENV array
* @return array the value in the $_ENV element
*/
public function getEnv($key) {
return isset($this->env[$key]) ? $this->env[$key] : null;
}
/**
* Shortcut for getting cookie variables
* @param string $key the key that will be taken from the $_COOKIE array
* @return array the value in the $_COOKIE element
*/
function getCookie($key) {
return isset($this->cookies[$key]) ? $this->cookies[$key] : null;
}
/**
* Returns the request body content.
*
* If the HTTP request method is PUT and the body
* not application/x-www-form-urlencoded or application/json a stream
* resource is returned, otherwise an array.
*
* @return array|string|resource The request body content or a resource to read the body stream.
*
* @throws \LogicException
*/
protected function getContent() {
// If the content can't be parsed into an array then return a stream resource.
if ($this->method === 'PUT'
&& strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') === false
&& strpos($this->getHeader('Content-Type'), 'application/json') === false
) {
if ($this->content === false) {
throw new \LogicException(
'"put" can only be accessed once if not '
. 'application/x-www-form-urlencoded or application/json.'
);
}
$this->content = false;
return fopen($this->inputStream, 'rb');
} else {
return $this->parameters;
}
}
/**
* Checks if the CSRF check was correct
* @return bool true if CSRF check passed
* @see OC_Util::callRegister()
*/
public function passesCSRFCheck() {
if($this->items['requesttoken'] === false) {
return false;
}
if (isset($this->items['get']['requesttoken'])) {
$token = $this->items['get']['requesttoken'];
} elseif (isset($this->items['post']['requesttoken'])) {
$token = $this->items['post']['requesttoken'];
} elseif (isset($this->items['server']['HTTP_REQUESTTOKEN'])) {
$token = $this->items['server']['HTTP_REQUESTTOKEN'];
} else {
//no token found.
return false;
}
// Check if the token is valid
if($token !== $this->items['requesttoken']) {
// Not valid
return false;
} else {
// Valid token
return true;
}
}}