forked from extern/egroupware
323 lines
8.6 KiB
PHP
323 lines
8.6 KiB
PHP
<?php
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/**
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* eGroupWare API: JSON - Contains functions and classes for doing JSON requests.
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api$request['menuaction'], $parameters
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* @subpackage ajax
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* @author Andreas Stoeckel <as@stylite.de>
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* @version $Id$
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*/
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/**
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* Class handling JSON requests to the server
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*/
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class egw_json_request
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{
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/**
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* Parses the raw input data supplied with the input_data parameter and calls the menuaction
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* passing all parameters supplied in the request to it.
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*
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* @param string menuaction to call
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* @param string $input_data is the RAW input data as it was received from the client
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* @returns NULL if parsing the request failed, or the result of the callback function if the request has been successfully decoded.
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*/
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public function parseRequest($menuaction, $input_data)
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{
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if (empty($input_data))
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{
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$this->handleRequest($menuaction, array());
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}
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else
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{
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//Decode the JSON input data into associative arrays
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if (($json = json_decode(stripslashes($input_data[0]), true)))
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{
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//Get the request array
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if (isset($json['request']))
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{
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$request = $json['request'];
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//Check whether any parameters were supplied along with the request
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$parameters = array();
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if (isset($request['parameters']))
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$parameters = array_stripslashes($request['parameters']);
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//Call the supplied callback function along with the menuaction and the passed parameters
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$this->handleRequest($menuaction, $parameters);
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}
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}
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}
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return NULL;
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}
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/**
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* Request handler
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*
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* @param string $menuaction
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* @param array $parameters
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*/
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public function handleRequest($menuaction, array $parameters)
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{
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if (strpos($menuaction,'::') !== false && strpos($menuaction,'.') === false) // static method name app_something::method
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{
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@list($className,$functionName,$handler) = explode('::',$menuaction);
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list($appName) = explode('_',$className);
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}
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else
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{
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@list($appName, $className, $functionName, $handler) = explode('.',$menuaction);
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}
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//error_log("json.php: appName=$appName, className=$className, functionName=$functionName, handler=$handler");
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switch($handler)
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{
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/* case '/etemplate/process_exec':
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$menuaction = $appName.'.'.$className.'.'.$functionName;
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$appName = $className = 'etemplate';
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$functionName = 'process_exec';
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$menuaction = 'etemplate.etemplate.process_exec';
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$argList = array(
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$argList[0]['etemplate_exec_id'],
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$argList[0]['submit_button'],
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$argList[0],
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'xajaxResponse',
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);
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//error_log("xajax_doXMLHTTP() /etemplate/process_exec handler: arg0='$menuaction', menuaction='$_GET[menuaction]'");
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break;*/
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case 'etemplate': // eg. ajax code in an eTemplate widget
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$menuaction = ($appName = 'etemplate').'.'.$className.'.'.$functionName;
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break;
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case 'template':
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$menuaction = $appName.'.'.$className.'.'.$functionName;
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list($template) = explode('_', $className);
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break;
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}
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if(substr($className,0,4) != 'ajax' && substr($className,-4) != 'ajax' &&
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$menuaction != 'etemplate.etemplate.process_exec' && substr($functionName,0,4) != 'ajax' ||
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!preg_match('/^[A-Za-z0-9_]+(\.[A-Za-z0-9_]+\.|::)[A-Za-z0-9_]+$/',$menuaction))
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{
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// stopped for security reasons
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error_log($_SERVER['PHP_SELF']. ' stopped for security reason. '.$menuaction.' is not valid. class- or function-name must start with ajax!!!');
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// send message also to the user
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throw new Exception($_SERVER['PHP_SELF']. ' stopped for security reason. '.$menuaction.' is not valid. class- or function-name must start with ajax!!!');
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exit;
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}
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if (isset($template))
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{
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if (!class_exists($className)) require_once(EGW_SERVER_ROOT.'/phpgwapi/templates/'.$template.'/class.'.$className.'.inc.php');
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$ajaxClass = new $className;
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}
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else
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{
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$ajaxClass = CreateObject($appName.'.'.$className);
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}
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$parameters = translation::convert($parameters, 'utf-8');
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call_user_func_array(array($ajaxClass, $functionName), $parameters);
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}
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}
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/**
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* Class used to send ajax responses
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*/
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class egw_json_response
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{
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/**
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* A response can only contain one generic data part.
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* This variable is used to store, whether a data part had already been added to the response.
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*
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* @var boolean
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*/
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private $hasData = false;
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/**
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* Holds the actual response data which is then encoded to JSON
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* once the "getJSON" function is called
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*
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* @var array
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*/
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protected $responseArray = array();
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/**
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* Holding instance of class for singelton egw_json_response::get()
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*
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* @var egw_json_response
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*/
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private static $response = null;
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/**
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* Singelton for class
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*
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* @return egw_json_response
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*/
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public static function get()
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{
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if (!isset(self::$response))
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{
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self::$response = new egw_json_response();
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}
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return self::$response;
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}
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/**
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* Private function used to send the HTTP header of the JSON response
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*/
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private function sendHeader()
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{
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//Send the character encoding header
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header('content-type: application/json; charset='.translation::charset());
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}
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/**
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* Private function which is used to send the result via HTTP
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*/
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public function sendResult()
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{
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$this->sendHeader();
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echo $this->getJSON();
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}
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/**
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* xAjax compatibility function
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*/
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public function printOutput()
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{
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// do nothing, as output is triggered by destructor
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}
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/**
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* Adds any type of data to the response array
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*/
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protected function addGeneric($key, $data)
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{
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$this->responseArray[] = array(
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'type' => $key,
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'data' => $data,
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);
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}
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/**
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* Adds a "data" response to the json response.
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*
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* This function may only be called once for a single JSON response object.
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*
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* @param object|array|string $data can be of any data type and will be added JSON Encoded to your response.
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*/
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public function data($data)
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{
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/* Only allow adding the data response once */
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if (!$this->hasData)
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{
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$this->addGeneric('data', $data);
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$this->hasData = true;
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}
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else
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{
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throw new Exception("Adding more than one data response to a JSON response is not allowed.");
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}
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}
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/**
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* Adds an "alert" to the response which can be handeled on the client side.
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*
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* The default implementation simply displays the text supplied here with the JavaScript function "alert".
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*
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* @param string $message contains the actual message being sent to the client.
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* @param string $details (optional) can be used to inform the user on the client side about additional details about the error. This might be information how the error can be resolved/why it was raised or simply some debug data.
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*/
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public function alert($message, $details = '')
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{
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if (is_string($message) && is_string($details))
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{
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$this->addGeneric('alert', array(
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"message" => $message,
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"details" => $details));
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}
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else
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{
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throw new Exception("Invalid parameters supplied.");
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}
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}
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/**
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* Allows to add a generic java script to the response which will be executed upon the request gets received.
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*
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* @deprecated
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* @param string $script the script code which should be executed upon receiving
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*/
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public function script($script)
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{
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if (is_string($script))
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{
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$this->addGeneric('script', $script);
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}
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else
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{
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throw new Exception("Invalid parameters supplied.");
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}
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}
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/**
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* Adds an html assign to the response, which is excecuted upon the request is received.
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*
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* @deprecated just for compatibility with XAJAX
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* @param string $id id of dom element to modify
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* @param string $key attribute name of dom element which should be modified
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* @param string $value the value which should be assigned to the given attribute
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*/
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public function assign($id, $key, $value)
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{
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if (is_string($id) && is_string($key) && (is_string($value) || is_numeric($value)))
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{
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$this->addGeneric('assign', array(
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'id' => $id,
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'key' => $key,
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'value' => $value,
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));
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}
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else
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{
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throw new Exception("Invalid parameters supplied");
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}
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}
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/**
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* Redirect to given url
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*
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* @param string $url
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*/
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public function redirect($url)
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{
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//self::script("location.href = '$url';");
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$this->addGeneric('redirect', $url);
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}
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/**
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* Returns the actual JSON code generated by calling the above "add" function.
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*
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* @return string
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*/
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public function getJSON()
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{
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/* Wrap the result array into a parent "response" Object */
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$res = array('response' => $this->responseArray);
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return json_encode($res); //PHP5.3+, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);
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}
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/**
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* Destructor
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*/
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public function __destruct()
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{
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$this->sendResult();
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}
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}
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