egroupware_official/phpgwapi/inc/horde/Horde/RPC.php

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<?php
/**
* The Horde_RPC:: class provides a set of server and client methods for
* RPC communication.
*
* TODO:
* - Introspection documentation and method signatures.
*
* EXAMPLE:
* <code>
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* $response = Horde_RPC::request('xmlrpc',
* 'http://localhost:80/horde/rpc.php'
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* 'contacts.search',
* array(array('jan'), array('localsql'),
* array('name', 'email')),
* array('user' => Auth::getAuth(),
* 'pass' => Auth::getCredential('password')));
* </code>
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*
* $Horde: framework/RPC/RPC.php,v 1.14 2006/01/01 21:10:10 jan Exp $
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*
* Copyright 2002-2006 Jan Schneider <jan@horde.org>
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*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @author Jan Schneider <jan@horde.org>
* @since Horde 3.0
* @package Horde_RPC
*/
class Horde_RPC {
/**
* Whether we need an authorized user or not.
*
* @access protected
* @var boolean
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*/
var $_authorize = true;
/**
* RPC server constructor
*
* @access private
* @return object An RPC server instance.
*/
function Horde_RPC()
{
register_shutdown_function(array($this, 'shutdown'));
}
/**
* Cleans up the RPC server.
*
* @abstract
*/
function shutdown()
{
}
/**
* Check authentication. Different backends may handle
* authentication in different ways. The base class implementation
* checks for HTTP Authentication against the Horde auth setup.
*
* @return boolean Returns true if authentication is successful.
* Should send appropriate "not authorized" headers
* or other response codes/body if auth fails,
* and take care of exiting.
*/
function authorize()
{
if (!$this->_authorize) {
return true;
}
$auth = &Auth::singleton($GLOBALS['conf']['auth']['driver']);
if (isset($_SERVER['PHP_AUTH_USER'])) {
$user = $_SERVER['PHP_AUTH_USER'];
$pass = $_SERVER['PHP_AUTH_PW'];
}
if (!isset($user)
|| !$auth->authenticate($user, array('password' => $pass))) {
header('WWW-Authenticate: Basic realm="Horde RPC"');
header('HTTP/1.0 401 Unauthorized');
echo '401 Unauthorized';
exit;
}
return true;
}
/**
* Get the request body input. Different RPC backends can override
* this to return an open stream to php://stdin, for instance -
* whatever is easiest to handle in the getResponse() method.
*
* The base class implementation looks for $HTTP_RAW_POST_DATA and
* returns that if it's available; otherwise, it returns the
* contents of php://stdin.
*
* @return mixed The input - a string (default), a filehandle, etc.
*/
function getInput()
{
if (isset($GLOBALS['HTTP_RAW_POST_DATA'])) {
return $GLOBALS['HTTP_RAW_POST_DATA'];
} else {
return implode("\r\n", file('php://input'));
}
}
/**
* Sends an RPC request to the server and returns the result.
*
* @param string The raw request string.
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*
* @return string The XML encoded response from the server.
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*/
function getResponse($request)
{
return _("not implemented");
}
/**
* Get the Content-Type of the response.
*
* @return string The MIME Content-Type of the RPC response.
*/
function getResponseContentType()
{
return 'text/xml';
}
/**
* Builds an RPC request and sends it to the RPC server.
*
* This statically called method is actually the RPC client.
*
* @param string $driver The protocol driver to use. Currently 'soap'
* and 'xmlrpc' are available.
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* @param string $url The path to the RPC server on the called host.
* @param string $method The method to call.
* @param array $params A hash containing any necessary parameters for
* the method call.
* @param $options Associative array of parameters depending on
* the selected protocol driver.
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*
* @return mixed The returned result from the method or a PEAR
* error object on failure.
*/
function request($driver, $url, $method, $params = null, $options = array())
{
if (is_array($driver)) {
list($app, $driver) = $driver;
}
$driver = basename($driver);
if (!empty($app)) {
require_once $app . '/lib/RPC/' . $driver . '.php';
} elseif (@file_exists(dirname(__FILE__) . '/RPC/' . $driver . '.php')) {
require_once dirname(__FILE__) . '/RPC/' . $driver . '.php';
} else {
@include_once 'Horde/RPC/' . $driver . '.php';
}
$class = 'Horde_RPC_' . $driver;
if (class_exists($class)) {
return call_user_func(array($class, 'request'), $url, $method, $params, $options);
} else {
require_once 'PEAR.php';
return PEAR::raiseError('Class definition of ' . $class . ' not found.');
}
}
/**
* Attempts to return a concrete RPC server instance based on
* $driver.
*
* @param mixed $driver The type of concrete RPC subclass to return. If
* $driver is an array, then we will look in
* $driver[0]/lib/RPC/ for the subclass
* implementation named $driver[1].php.
* @param array $params A hash containing any additional configuration or
* connection parameters a subclass might need.
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*
* @return Horde_RPC The newly created concrete Horde_RPC server instance,
* or a PEAR_Error on an error.
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*/
function &factory($driver, $params = null)
{
if (is_array($driver)) {
list($app, $driver) = $driver;
}
$driver = basename($driver);
if (!empty($app)) {
require_once $app . '/lib/RPC/' . $driver . '.php';
} elseif (@file_exists(dirname(__FILE__) . '/RPC/' . $driver . '.php')) {
require_once dirname(__FILE__) . '/RPC/' . $driver . '.php';
} else {
@include_once 'Horde/RPC/' . $driver . '.php';
}
$class = 'Horde_RPC_' . $driver;
if (class_exists($class)) {
$rpc = new $class($params);
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} else {
require_once 'PEAR.php';
$rpc = PEAR::raiseError('Class definition of ' . $class . ' not found.');
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}
return $rpc;
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}
/**
* Attempts to return a reference to a concrete RPC server
* instance based on $driver. It will only create a new instance
* if no RPC server instance with the same parameters currently
* exists.
*
* This should be used if multiple RPC servers (and thus, multiple RPC
* server instances) are required.
*
* This method must be invoked as: $var = &Horde_RPC::singleton()
*
* @param string $driver The type of concrete RPC subclass to return.
* @param array $params A hash containing any additional configuration or
* connection parameters a subclass might need.
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*
* @return Horde_RPC The concrete Horde_RPC server reference, or a
* PEAR_Error on an error.
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*/
function &singleton($driver, $params = null)
{
static $instances;
if (!isset($instances)) {
$instances = array();
}
$signature = serialize(array($driver, $params));
if (!array_key_exists($signature, $instances)) {
$instances[$signature] = &Horde_RPC::factory($driver, $params);
}
return $instances[$signature];
}
}