mirror of
https://github.com/EGroupware/egroupware.git
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703 lines
18 KiB
PHP
703 lines
18 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
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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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private static $_hadJSONRequest = false;
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/**
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* Check if JSON request running or (re)set JSON request flag
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*
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* Can be used to:
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* - detect regular JSON request:
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* egw_json_request::isJSONRequest()
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* - switch regular JSON response handling off, which would send arbitrary output via response method "html".
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* Neccessary if json.php is used to send arbitrary JSON data eg. nodes for foldertree!
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* egw_json_request::isJSONRequest(false)
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*
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* @param boolean $set =null
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* @return boolean
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*/
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public static function isJSONRequest($set=null)
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{
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$ret = self::$_hadJSONRequest;
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if (isset($set)) self::$_hadJSONRequest = $set;
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return $ret;
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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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* Also handle queued requests (menuaction == 'home.queue') containing multiple requests
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*
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* @param string menuaction to call
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* @param string $input_data is the RAW input data as it was received from the client
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*/
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public function parseRequest($menuaction, $input_data)
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{
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// Remember that we currently are in a JSON request - e.g. used in the redirect code
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self::$_hadJSONRequest = true;
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if (get_magic_quotes_gpc()) $input_data = stripslashes($input_data);
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$json_data = json_decode($input_data,true);
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if (is_array($json_data) && isset($json_data['request']) && isset($json_data['request']['parameters']) && is_array($json_data['request']['parameters']))
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{
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//error_log(__METHOD__.__LINE__.array2string($json_data['request']).function_backtrace());
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$parameters =& $json_data['request']['parameters'];
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}
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else
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{
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$parameters = array();
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}
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// do we have a single request or an array of queued requests
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if ($menuaction == 'home.queue')
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{
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$responses = array();
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$response = egw_json_response::get();
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foreach($parameters[0] as $uid => $data)
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{
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//error_log("$uid: menuaction=$data[menuaction], parameters=".array2string($data['parameters']));
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$this->handleRequest($data['menuaction'], (array)$data['parameters']);
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$responses[$uid] = $response->initResponseArray();
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//error_log("responses[$uid]=".array2string($responses[$uid]));
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}
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$response->data($responses); // send all responses as data
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}
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else
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{
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$this->handleRequest($menuaction, $parameters);
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}
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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('_',$className);
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// Check for a real static method, avoid instanciation if it is
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$m = new ReflectionMethod($menuaction);
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if($m->isStatic())
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{
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$ajaxClass = $className;
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}
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}
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else
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{
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@list($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($handler)
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{
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case '/etemplate/process_exec':
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$_GET['menuaction'] = $appName.'.'.$className.'.'.$functionName;
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$appName = $className = 'etemplate';
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$functionName = 'process_exec';
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$menuaction = 'etemplate.etemplate.process_exec';
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$parameters = array(
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$parameters[0]['etemplate_exec_id'],
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$parameters[0]['submit_button'],
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$parameters[0],
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'xajaxResponse',
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);
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//error_log("xajax_doXMLHTTP() /etemplate/process_exec handler: arg0='$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.'.'.$functionName;
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break;
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case 'template': // calling current template / framework object
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$menuaction = $appName.'.'.$className.'.'.$functionName;
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$className = get_class($GLOBALS['egw']->framework);
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list($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. '.$menuaction.' is not valid. class- or function-name must start with ajax!!!');
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}
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if (isset($template))
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{
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$ajaxClass = $GLOBALS['egw']->framework;
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}
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else if (!$ajaxClass)
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{
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$ajaxClass = CreateObject($appName.'.'.$className);
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}
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// for Ajax: no need to load the "standard" javascript files,
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// they are already loaded, in fact jquery has a problem if loaded twice
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egw_framework::js_files(array());
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call_user_func_array(array($ajaxClass, $functionName),
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translation::convert($parameters, 'utf-8'));
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// check if we have push notifications, if notifications app available
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if (class_exists('notifications_push')) notifications_push::get();
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}
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}
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/**
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* Abstract class implementing different type of JSON messages understood by client-side
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*/
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abstract class egw_json_msg
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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', $script);
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}
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else
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{
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throw new Exception("Invalid parameters supplied.");
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}
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}
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/**
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* Allows to call a global javascript function with given parameters: window[$func].apply(window, $parameters)
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*
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* @param string $function name of the global (window) javascript function to call
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* @param array $parameters =array()
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*/
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public function apply($function,array $parameters=array())
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{
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if (is_string($function))
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{
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$this->addGeneric('apply', array(
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'func' => $function,
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'parms' => $parameters,
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));
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}
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else
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{
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throw new Exception("Invalid parameters supplied.");
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}
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}
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/**
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* Allows to call a global javascript function with given parameters: window[$func].call(window[, $param1[, ...]])
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*
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* @param string $func name of the global (window) javascript function to call
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* @param mixed $parameters variable number of parameters
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*/
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public function call($function)
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{
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$parameters = func_get_args();
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array_shift($parameters); // shift off $function
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if (is_string($function))
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{
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$this->addGeneric('apply', array(
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'func' => $function,
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'parms' => $parameters,
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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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* Allows to call a jquery function on a selector with given parameters: $j($selector).$func($parmeters)
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*
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* @param string $selector jquery selector
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* @param string $method name of the jquery to call
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* @param array $parameters =array()
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*/
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public function jquery($selector,$method,array $parameters=array())
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{
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if (is_string($selector) && is_string($method))
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{
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$this->addGeneric('jquery', array(
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'select' => $selector,
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'func' => $method,
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'parms' => $parameters,
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));
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}
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else
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{
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throw new Exception("Invalid parameters supplied.");
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}
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}
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public function generic($type, array $parameters = array())
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{
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if (is_string($type))
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{
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$this->addGeneric($type, $parameters);
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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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* @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($value) || is_null($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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* @param boolean $global specifies whether to redirect the whole framework
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* @param string $app =null default current app from flags
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* or only the current application
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*/
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public function redirect($url, $global = false, $app=null)
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{
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if (is_string($url) && is_bool($global))
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{
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//self::script("location.href = '$url';");
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$this->addGeneric('redirect', array(
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'url' => $url,
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'global' => $global,
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'app' => $app ? $app : $GLOBALS['egw_info']['flags']['currentapp'],
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));
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}
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}
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/**
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* Displays an error message on the client
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*/
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public function error($msg)
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{
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if (is_string($msg))
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{
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$this->addGeneric('error', $msg);
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}
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}
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/**
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* Includes the given CSS file. Every url can only be included once.
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*
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* @param string $url specifies the url to the css file to include
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*/
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public function includeCSS($url)
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{
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if (is_string($url))
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{
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$this->addGeneric('css', $url);
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}
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}
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/**
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* Includes the given JS file. Every url can only be included once.
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*
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* @param string $url specifies the url to the css file to include
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*/
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public function includeScript($url)
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{
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if (is_string($url))
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{
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$this->addGeneric('js', $url);
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}
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}
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/**
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* Adds any type of data to the message
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*
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* @param string $key
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* @param mixed $data
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*/
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abstract protected function addGeneric($key, $data);
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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 extends egw_json_msg
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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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* Array containing all beforeSendData callbacks
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*/
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protected $beforeSendDataProcs = array();
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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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* Force use of singleton: $response = egw_json_response::get();
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*/
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protected function __construct()
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{
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}
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/**
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* Singelton for class
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*
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* @return egw_json_response
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*/
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public static function get()
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{
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if (!isset(self::$response))
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{
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self::$response = new egw_json_response();
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self::sendHeader();
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}
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return self::$response;
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}
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public static function isJSONResponse()
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{
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return isset(self::$response);
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}
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/**
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* Do we have a JSON response to send back
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*
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* @return boolean
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*/
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public function haveJSONResponse()
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{
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return $this->responseArray || $this->beforeSendDataProcs;
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}
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/**
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* Private function used to send the HTTP header of the JSON response
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*/
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private function sendHeader()
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{
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$file = $line = null;
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if (headers_sent($file, $line))
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{
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error_log(__METHOD__."() header already sent by $file line $line: ".function_backtrace());
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}
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else
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{
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//Send the character encoding header
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header('content-type: application/json; charset='.translation::charset());
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}
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}
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/**
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* Private function which is used to send the result via HTTP
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*/
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public static function sendResult()
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{
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$inst = self::get();
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//Call each attached before send data proc
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foreach ($inst->beforeSendDataProcs as $proc)
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{
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call_user_func_array($proc['proc'], $proc['params']);
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}
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// check if application made some direct output
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if (($output = ob_get_clean()))
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{
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if (!$inst->haveJSONResponse())
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{
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error_log(__METHOD__."() adding output with inst->addGeneric('html', '$output')");
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$inst->addGeneric('html', $output);
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}
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else
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{
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$inst->alert('Application echoed something', $output);
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}
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}
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echo $inst->getJSON();
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$inst->initResponseArray();
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}
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/**
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* Return json response data, after running beforeSendDataProcs
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*
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* Used to send json response with etemplate data in GET request
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*
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* @return array responseArray
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*/
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public static function returnResult()
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{
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$inst = self::get();
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//Call each attached before send data proc
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foreach ($inst->beforeSendDataProcs as $proc)
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{
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call_user_func_array($proc['proc'], $proc['params']);
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}
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return $inst->initResponseArray();
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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 egw::__destruct()
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}
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/**
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* Adds any type of data to the message
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*
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* @param string $key
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* @param mixed $data
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*/
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protected function addGeneric($key, $data)
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{
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self::get()->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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* Init responseArray
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*
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* @param array $arr
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* @return array previous content
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*/
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public function initResponseArray()
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{
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$return = $this->responseArray;
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$this->responseArray = $this->beforeSendDataProcs = array();
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$this->hasData = false;
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return $return;
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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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$inst = self::get();
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if (!$inst->hasData)
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{
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$inst->addGeneric('data', $data);
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$inst->hasData = true;
|
|
}
|
|
else
|
|
{
|
|
throw new Exception("Adding more than one data response to a JSON response is not allowed.");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the actual JSON code generated by calling the above "add" function.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getJSON()
|
|
{
|
|
$inst = self::get();
|
|
|
|
/* Wrap the result array into a parent "response" Object */
|
|
$res = array('response' => $inst->responseArray);
|
|
|
|
return self::json_encode($res); //PHP5.3+, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);
|
|
}
|
|
|
|
/**
|
|
* More fault-tollerant version of json_encode removing everything that does not json_encode eg. because not utf-8
|
|
*
|
|
* @param mixed $var
|
|
* @return string
|
|
*/
|
|
public static function json_encode($var)
|
|
{
|
|
$ret = json_encode($var);
|
|
|
|
if ($ret === false && ($err = json_last_error()))
|
|
{
|
|
static $json_err2str = array(
|
|
JSON_ERROR_NONE => 'No errors',
|
|
JSON_ERROR_DEPTH => 'Maximum stack depth exceeded',
|
|
JSON_ERROR_STATE_MISMATCH => 'Underflow or the modes mismatch',
|
|
JSON_ERROR_CTRL_CHAR => 'Unexpected control character found',
|
|
JSON_ERROR_SYNTAX => 'Syntax error, malformed JSON',
|
|
JSON_ERROR_UTF8 => 'Malformed UTF-8 characters, possibly incorrectly encoded',
|
|
);
|
|
error_log(__METHOD__.'('.array2string($var).') json_last_error()='.$err.'='.$json_err2str[$err]);
|
|
|
|
if (($var = self::fix_content($var)))
|
|
{
|
|
return self::json_encode($var);
|
|
}
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Set everything in $var to null, that does not json_encode, eg. because no valid utf-8
|
|
*
|
|
* @param midex $var
|
|
* @param string $prefix =''
|
|
* @return mixed
|
|
*/
|
|
public static function fix_content($var, $prefix='')
|
|
{
|
|
if (json_encode($var) !== false) return $var;
|
|
|
|
if (is_scalar($var))
|
|
{
|
|
error_log(__METHOD__."() json_encode($prefix='$var') === false --> setting it to null");
|
|
$var = null;
|
|
}
|
|
else
|
|
{
|
|
foreach($var as $name => &$value)
|
|
{
|
|
$value = self::fix_content($value, $prefix ? $prefix.'['.$name.']' : $name);
|
|
}
|
|
}
|
|
return $var;
|
|
}
|
|
|
|
/**
|
|
* Function which can be used to add an event listener callback function to
|
|
* the "beforeSendData" callback. This callback might be used to add a response
|
|
* which always has to be added after all other responses.
|
|
* @param callback Callback function or method which should be called before the response gets sent
|
|
* @param mixed n Optional parameters which get passed to the callback function.
|
|
*/
|
|
public function addBeforeSendDataCallback($proc)
|
|
{
|
|
//Get the current instance
|
|
$inst = self::get();
|
|
|
|
//Get all parameters passed to the function and delete the first one
|
|
$params = func_get_args();
|
|
array_shift($params);
|
|
|
|
$inst->beforeSendDataProcs[] = array(
|
|
'proc' => $proc,
|
|
'params' => $params
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Deprecated legacy xajax wrapper functions for the new egw_json interface
|
|
*/
|
|
class xajaxResponse
|
|
{
|
|
public function __call($name, $args)
|
|
{
|
|
if (substr($name, 0, 3) == 'add')
|
|
{
|
|
$name = substr($name, 3);
|
|
$name[0] = strtolower($name[0]);
|
|
}
|
|
return call_user_func_array(array(egw_json_response::get(), $name), $args);
|
|
}
|
|
|
|
public function addScriptCall()
|
|
{
|
|
$args = func_get_args();
|
|
$func = array_shift($args);
|
|
|
|
return call_user_func(array(egw_json_response::get(), 'apply'), $func, $args);
|
|
}
|
|
|
|
public function getXML()
|
|
{
|
|
return '';
|
|
}
|
|
}
|