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<?php
/**
* Elgg XML-RPC library.
* Contains functions and classes to handle XML-RPC services, currently only server only.
*
* @package Elgg.Core
* @subpackage XMLRPC
*/
/**
* parse XMLRPCCall parameters
*
* Convert an XMLRPCCall result array into native data types
*
* @param array $parameters An array of params
*
* @return array
* @access private
*/
function xmlrpc_parse_params($parameters) {
$result = array();
foreach ($parameters as $parameter) {
$result[] = xmlrpc_scalar_value($parameter);
}
return $result;
}
/**
* Extract the scalar value of an XMLObject type result array
*
* @param XMLObject $object And object
*
* @return mixed
* @access private
*/
function xmlrpc_scalar_value($object) {
if ($object->name == 'param') {
$object = $object->children[0]->children[0];
}
switch ($object->name) {
case 'string':
return $object->content;
case 'array':
foreach ($object->children[0]->children as $child) {
$value[] = xmlrpc_scalar_value($child);
}
return $value;
case 'struct':
foreach ($object->children as $child) {
if (isset($child->children[1]->children[0])) {
$value[$child->children[0]->content] = xmlrpc_scalar_value($child->children[1]->children[0]);
} else {
$value[$child->children[0]->content] = $child->children[1]->content;
}
}
return $value;
case 'boolean':
return (boolean) $object->content;
case 'i4':
case 'int':
return (int) $object->content;
case 'double':
return (double) $object->content;
case 'dateTime.iso8601':
return (int) strtotime($object->content);
case 'base64':
return base64_decode($object->content);
case 'value':
return xmlrpc_scalar_value($object->children[0]);
default:
// @todo unsupported, throw an error
return false;
}
}
// Functions for adding handlers //////////////////////////////////////////////////////////
/** XML-RPC Handlers */
global $XML_RPC_HANDLERS;
$XML_RPC_HANDLERS = array();
/**
* Register a method handler for a given XML-RPC method.
*
* @param string $method Method parameter.
* @param string $handler The handler function. This function accepts
* one XMLRPCCall object and must return a XMLRPCResponse object.
*
* @return bool
*/
function register_xmlrpc_handler($method, $handler) {
global $XML_RPC_HANDLERS;
$XML_RPC_HANDLERS[$method] = $handler;
}
/**
* Trigger a method call and pass the relevant parameters to the funciton.
*
* @param XMLRPCCall $parameters The call and parameters.
*
* @return XMLRPCCall
* @access private
*/
function trigger_xmlrpc_handler(XMLRPCCall $parameters) {
global $XML_RPC_HANDLERS;
// Go through and see if we have a handler
if (isset($XML_RPC_HANDLERS[$parameters->getMethodName()])) {
$handler = $XML_RPC_HANDLERS[$parameters->getMethodName()];
$result = $handler($parameters);
if (!($result instanceof XMLRPCResponse)) {
$msg = elgg_echo('InvalidParameterException:UnexpectedReturnFormat',
array($parameters->getMethodName()));
throw new InvalidParameterException($msg);
}
// Result in right format, return it.
return $result;
}
// if no handler then throw exception
$msg = elgg_echo('NotImplementedException:XMLRPCMethodNotImplemented',
array($parameters->getMethodName()));
throw new NotImplementedException($msg);
}
/**
* PHP Error handler function.
* This function acts as a wrapper to catch and report PHP error messages.
*
* @see http://uk3.php.net/set-error-handler
*
* @param int $errno Error number
* @param string $errmsg Human readable message
* @param string $filename Filename
* @param int $linenum Line number
* @param array $vars Vars
*
* @return void
* @access private
*/
function _php_xmlrpc_error_handler($errno, $errmsg, $filename, $linenum, $vars) {
$error = date("Y-m-d H:i:s (T)") . ": \"" . $errmsg . "\" in file "
. $filename . " (line " . $linenum . ")";
switch ($errno) {
case E_USER_ERROR:
error_log("ERROR: " . $error);
// Since this is a fatal error, we want to stop any further execution but do so gracefully.
throw new Exception("ERROR: " . $error);
break;
case E_WARNING :
case E_USER_WARNING :
error_log("WARNING: " . $error);
break;
default:
error_log("DEBUG: " . $error);
}
}
/**
* PHP Exception handler for XMLRPC.
*
* @param Exception $exception The exception
*
* @return void
* @access private
*/
function _php_xmlrpc_exception_handler($exception) {
error_log("*** FATAL EXCEPTION (XML-RPC) *** : " . $exception);
$code = $exception->getCode();
if ($code == 0) {
$code = -32400;
}
$result = new XMLRPCErrorResponse($exception->getMessage(), $code);
$vars = array('result' => $result);
$content = elgg_view("xml-rpc/output", $vars);
echo elgg_view_page($exception->getMessage(), $content);
}
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