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documenting and adding exception and redirect handler to json handler

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This commit is contained in:
Ralf Becker 2010-06-01 18:54:31 +00:00
parent 0c243b49a3
commit a3bb4afe1b
3 changed files with 160 additions and 49 deletions
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47
json.php
View File

@ -1,16 +1,29 @@
<?php
/**
* eGroupWare - JSON gateway
* eGroupWare - general JSON handler for EGroupware
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage ajax
* @author Andreas Stoeckel
* @author Andreas Stoeckel <as@stylite.de>
* @version $Id$
*/
require_once('./phpgwapi/inc/class.egw_json.inc.php');
/**
* callback if the session-check fails, redirects via xajax to login.php
*
* @param array &$anon_account anon account_info with keys 'login', 'passwd' and optional 'passwd_type'
* @return boolean/string true if we allow anon access and anon_account is set, a sessionid or false otherwise
*/
function xajax_redirect(&$anon_account)
{
$response = new egw_json_response();
$response->redirect($GLOBALS['egw_info']['server']['webserver_url'].'/login.php?cd=10');
$response->printOutput();
common::egw_exit();
}
/**
* Exception handler for xajax, return the message (and trace, if enabled) as alert() to the user
@ -21,7 +34,27 @@ require_once('./phpgwapi/inc/class.egw_json.inc.php');
*/
function ajax_exception_handler(Exception $e)
{
//Exceptions should be returned
// logging all exceptions to the error_log
if (function_exists('_egw_log_exception'))
{
_egw_log_exception($e,$message);
}
$response = new egw_json_response();
$message .= ($message ? "\n\n" : '').$e->getMessage();
// only show trace (incl. function arguments) if explicitly enabled, eg. on a development system
if ($GLOBALS['egw_info']['server']['exception_show_trace'])
{
$message .= "\n\n".$e->getTraceAsString();
}
$response->addAlert($message);
$response->printOutput();
if (is_object($GLOBALS['egw']))
{
common::egw_exit();
}
exit;
}
// set our own exception handler, to not get the html from eGW's default one
@ -58,9 +91,7 @@ if (isset($_GET['menuaction']))
//Check whether the request data is set
$json->parseRequest($_GET['menuaction'], (array)$_POST['json_data']);
exit;
common::egw_exit();
}
throw new Exception($_SERVER['PHP_SELF'] . "Invalid AJAX JSON Request");
throw new Exception($_SERVER['PHP_SELF'] . ' Invalid AJAX JSON Request');

158
phpgwapi/inc/class.egw_json.inc.php
View File

@ -6,18 +6,23 @@
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api$request['menuaction'], $parameters
* @subpackage ajax
* @author Andreas Stoeckel
* @author Andreas Stoeckel <as@stylite.de>
* @version $Id$
*/
/* Class which handles JSON requests to the server */
/**
* Class handling JSON requests to the server
*/
class egw_json_request
{
/* Parses the raw input data supplied with the input_data parameter and calls the
callback function, passing the "menuaction" and all parameters supplied in the request to it.
@param string $input_data is the RAW input data as it was received from the client
@param callback $callback(string $menuaction, array $parameters) called when a valid request has been received. The result of the callback function will be returned by parseRequest
@returns NULL if parsing the request failed, or the result of the callback function if the request has been successfully decoded.*/
/**
* Parses the raw input data supplied with the input_data parameter and calls the menuaction
* passing all parameters supplied in the request to it.
*
* @param string menuaction to call
* @param string $input_data is the RAW input data as it was received from the client
* @returns NULL if parsing the request failed, or the result of the callback function if the request has been successfully decoded.
*/
public function parseRequest($menuaction, $input_data)
{
if (empty($input_data))
@ -27,7 +32,7 @@ class egw_json_request
else
{
//Decode the JSON input data into associative arrays
if ($json = json_decode(stripslashes($input_data[0]), true))
if (($json = json_decode(stripslashes($input_data[0]), true)))
{
//Get the request array
if (isset($json['request']))
@ -48,7 +53,13 @@ class egw_json_request
return NULL;
}
public function handleRequest($menuaction, $parameters)
/**
* Request handler
*
* @param string $menuaction
* @param array $parameters
*/
public function handleRequest($menuaction, array $parameters)
{
if (strpos($menuaction,'::') !== false && strpos($menuaction,'.') === false) // static method name app_something::method
{
@ -113,18 +124,39 @@ class egw_json_request
}
}
/**
* Class used to send ajax responses
*/
class egw_json_response
{
/* A response can only contain one generic data part. This variable is used to
store, whether a data part had already been added to the response.*/
/**
* A response can only contain one generic data part.
* This variable is used to store, whether a data part had already been added to the response.
*
* @var boolean
*/
private $hasData = false;
/* Holds the actual response data which is then encoded to JSON once the "getJSON"
function is called */
/**
* Holds the actual response data which is then encoded to JSON
* once the "getJSON" function is called
*
* @var array
*/
protected $responseArray = array();
/**
* Holding instance of class for singelton egw_json_response::get()
*
* @var egw_json_response
*/
private static $response = null;
/**
* Singelton for class
*
* @return egw_json_response
*/
public static function get()
{
if (!isset(self::$response))
@ -134,31 +166,50 @@ class egw_json_response
return self::$response;
}
/* Private function used to send the HTTP header of the JSON response */
/**
* Private function used to send the HTTP header of the JSON response
*/
private function sendHeader()
{
//Send the character encoding header
header('content-type: application/json; charset='.translation::charset());
}
/* Privade function which is used to send the result via HTTP */
private function sendResult()
/**
* Private function which is used to send the result via HTTP
*/
public function sendResult()
{
$this->sendHeader();
echo $this->getJSON();
}
/**
* xAjax compatibility function
*/
public function printOutput()
{
// do nothing, as output is triggered by destructor
}
/* Adds any type of data to the response array */
/**
* Adds any type of data to the response array
*/
protected function addGeneric($key, $data)
{
$this->responseArray[] = array(
"type" => $key,
"data" => $data);
'type' => $key,
'data' => $data,
);
}
/* Adds a "data" response to the json response. This function may only be called once
for a single JSON response object.
@param object/array/string $data can be of any data type and will be added JSON Encoded to your response.*/
/**
* Adds a "data" response to the json response.
*
* This function may only be called once for a single JSON response object.
*
* @param object|array|string $data can be of any data type and will be added JSON Encoded to your response.
*/
public function data($data)
{
/* Only allow adding the data response once */
@ -173,10 +224,14 @@ class egw_json_response
}
}
/* Adds an "alert" to the response which can be handeled on the client side. The default implementation simply displays
the text supplied here with the JavaScript function "alert".
@param string $message contains the actual message being sent to the client.
@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.*/
/**
* Adds an "alert" to the response which can be handeled on the client side.
*
* The default implementation simply displays the text supplied here with the JavaScript function "alert".
*
* @param string $message contains the actual message being sent to the client.
* @param string $details (optional) can be used to inform the user on the client side about additional details about the error. This might be information how the error can be resolved/why it was raised or simply some debug data.
*/
public function alert($message, $details = '')
{
if (is_string($message) && is_string($details))
@ -191,9 +246,12 @@ class egw_json_response
}
}
/* Allows you to add a generic java script to the response which will be executed upon the request gets received. Deprecated.
@deprecated
@param string $script the script code which should be executed upon receiving*/
/**
* Allows to add a generic java script to the response which will be executed upon the request gets received.
*
* @deprecated
* @param string $script the script code which should be executed upon receiving
*/
public function script($script)
{
if (is_string($script))
@ -206,34 +264,56 @@ class egw_json_response
}
}
/* Adds an html assign to the response, which is excecuted upon the request is received. Deprecated, just for compatibility with XAJAX
@deprecated
@param string $id the identifier of the html element in which the assign shall take place
@param string $key the key in the html element which should be modified when the assign takes place.
@param string $value the value which should be assigned to the given key*/
/**
* Adds an html assign to the response, which is excecuted upon the request is received.
*
* @deprecated just for compatibility with XAJAX
* @param string $id id of dom element to modify
* @param string $key attribute name of dom element which should be modified
* @param string $value the value which should be assigned to the given attribute
*/
public function assign($id, $key, $value)
{
if (is_string($id) && is_string($key) && (is_string($value) || is_numeric($value)))
{
$this->addGeneric('assign', array(
"id" => $id,
"key" => $key,
"value" => $value));
'id' => $id,
'key' => $key,
'value' => $value,
));
}
else
{
throw new Exception("Invalid parameters supplied");
}
}
/**
* Redirect to given url
*
* @param string $url
*/
public function redirect($url)
{
self::script("location.href = '$url';");
}
/* Returns the actual JSON code generated by calling the above "add" function.*/
/**
* Returns the actual JSON code generated by calling the above "add" function.
*
* @return string
*/
public function getJSON()
{
/* Wrap the result array into a parent "response" Object */
$res['response'] = $this->responseArray;
$res = array('response' => $this->responseArray);
return json_encode($res, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);
}
/**
* Destructor
*/
public function __destruct()
{
$this->sendResult();

4
phpgwapi/js/egw_json.js
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@ -5,8 +5,8 @@
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage ajax
* @author Andreas Stoeckel
* @version $Id:$
* @author Andreas Stoeckel <as@stylite.de>
* @version $Id$
*/
/* The egw_json_request is the javaScript side implementation of class.egw_json.inc.php.*/