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<?php
// $Id: xmlrpcs.inc,v 1.24 2007/12/31 08:54:36 dries Exp $
/**
* The main entry point for XML-RPC requests.
*
* @param $callbacks
* Array of external XML-RPC method names with the callbacks they map to.
*/
function xmlrpc_server($callbacks) {
$xmlrpc_server = new stdClass();
// Define built-in XML-RPC method names
$defaults = array(
'system.multicall' => 'xmlrpc_server_multicall',
array(
'system.methodSignature',
'xmlrpc_server_method_signature',
array('array', 'string'),
'Returns an array describing the return type and required parameters of a method.'
),
array(
'system.getCapabilities',
'xmlrpc_server_get_capabilities',
array('struct'),
'Returns a struct describing the XML-RPC specifications supported by this server.'
),
array(
'system.listMethods',
'xmlrpc_server_list_methods',
array('array'),
'Returns an array of available methods on this server.'),
array(
'system.methodHelp',
'xmlrpc_server_method_help',
array('string', 'string'),
'Returns a documentation string for the specified method.')
);
// We build an array of all method names by combining the built-ins
// with those defined by modules implementing the _xmlrpc hook.
// Built-in methods are overridable.
foreach (array_merge($defaults, (array)$callbacks) as $key => $callback) {
// we could check for is_array($callback)
if (is_int($key)) {
$method = $callback[0];
$xmlrpc_server->callbacks[$method] = $callback[1];
$xmlrpc_server->signatures[$method] = $callback[2];
$xmlrpc_server->help[$method] = $callback[3];
}
else {
$xmlrpc_server->callbacks[$key] = $callback;
$xmlrpc_server->signatures[$key] = '';
$xmlrpc_server->help[$key] = '';
}
}
$data = file_get_contents('php://input');
if (!$data) {
die('XML-RPC server accepts POST requests only.');
}
$xmlrpc_server->message = xmlrpc_message($data);
if (!xmlrpc_message_parse($xmlrpc_server->message)) {
xmlrpc_server_error(-32700, t('Parse error. Request not well formed.'));
}
if ($xmlrpc_server->message->messagetype != 'methodCall') {
xmlrpc_server_error(-32600, t('Server error. Invalid XML-RPC. Request must be a methodCall.'));
}
xmlrpc_server_set($xmlrpc_server);
$result = xmlrpc_server_call($xmlrpc_server, $xmlrpc_server->message->methodname, $xmlrpc_server->message->params);
if ($result->is_error) {
xmlrpc_server_error($result);
}
// Encode the result
$r = xmlrpc_value($result);
// Create the XML
$xml = '
<methodResponse>
<params>
<param>
<value>'.
xmlrpc_value_get_xml($r)
.'</value>
</param>
</params>
</methodResponse>
';
// Send it
xmlrpc_server_output($xml);
}
/**
* Throw an XML-RPC error.
*
* @param $error
* an error object OR integer error code
* @param $message
* description of error, used only if integer error code was passed
*/
function xmlrpc_server_error($error, $message = FALSE) {
if ($message && !is_object($error)) {
$error = xmlrpc_error($error, $message);
}
xmlrpc_server_output(xmlrpc_error_get_xml($error));
}
function xmlrpc_server_output($xml) {
$xml = '<?xml version="1.0"?>'."\n". $xml;
header('Connection: close');
header('Content-Length: '. strlen($xml));
header('Content-Type: text/xml');
header('Date: '. date('r'));
echo $xml;
exit;
}
/**
* Store a copy of the request temporarily.
*
* @param $xmlrpc_server
* Request object created by xmlrpc_server().
*/
function xmlrpc_server_set($xmlrpc_server = NULL) {
static $server;
if (!isset($server)) {
$server = $xmlrpc_server;
}
return $server;
}
// Retrieve the stored request.
function xmlrpc_server_get() {
return xmlrpc_server_set();
}
/**
* Dispatch the request and any parameters to the appropriate handler.
*
* @param $xmlrpc_server
* @param $methodname
* The external XML-RPC method name, e.g. 'system.methodHelp'
* @param $args
* Array containing any parameters that were sent along with the request.
*/
function xmlrpc_server_call($xmlrpc_server, $methodname, $args) {
// Make sure parameters are in an array
if ($args && !is_array($args)) {
$args = array($args);
}
// Has this method been mapped to a Drupal function by us or by modules?
if (!isset($xmlrpc_server->callbacks[$methodname])) {
return xmlrpc_error(-32601, t('Server error. Requested method %methodname not specified.', array("%methodname" => $xmlrpc_server->message->methodname)));
}
$method = $xmlrpc_server->callbacks[$methodname];
$signature = $xmlrpc_server->signatures[$methodname];
// If the method has a signature, validate the request against the signature
if (is_array($signature)) {
$ok = TRUE;
$return_type = array_shift($signature);
// Check the number of arguments
if (count($args) != count($signature)) {
return xmlrpc_error(-32602, t('Server error. Wrong number of method parameters.'));
}
// Check the argument types
foreach ($signature as $key => $type) {
$arg = $args[$key];
switch ($type) {
case 'int':
case 'i4':
if (is_array($arg) || !is_int($arg)) {
$ok = FALSE;
}
break;
case 'base64':
case 'string':
if (!is_string($arg)) {
$ok = FALSE;
}
break;
case 'boolean':
if ($arg !== FALSE && $arg !== TRUE) {
$ok = FALSE;
}
break;
case 'float':
case 'double':
if (!is_float($arg)) {
$ok = FALSE;
}
break;
case 'date':
case 'dateTime.iso8601':
if (!$arg->is_date) {
$ok = FALSE;
}
break;
}
if (!$ok) {
return xmlrpc_error(-32602, t('Server error. Invalid method parameters.'));
}
}
}
if (!function_exists($method)) {
return xmlrpc_error(-32601, t('Server error. Requested function %method does not exist.', array("%method" => $method)));
}
// Call the mapped function
return call_user_func_array($method, $args);
}
function xmlrpc_server_multicall($methodcalls) {
// See http://www.xmlrpc.com/discuss/msgReader$1208
$return = array();
$xmlrpc_server = xmlrpc_server_get();
foreach ($methodcalls as $call) {
$ok = TRUE;
if (!isset($call['methodName']) || !isset($call['params'])) {
$result = xmlrpc_error(3, t('Invalid syntax for system.multicall.'));
$ok = FALSE;
}
$method = $call['methodName'];
$params = $call['params'];
if ($method == 'system.multicall') {
$result = xmlrpc_error(-32600, t('Recursive calls to system.multicall are forbidden.'));
}
elseif ($ok) {
$result = xmlrpc_server_call($xmlrpc_server, $method, $params);
}
if ($result->is_error) {
$return[] = array(
'faultCode' => $result->code,
'faultString' => $result->message
);
}
else {
$return[] = $result;
}
}
return $return;
}
/**
* XML-RPC method system.listMethods maps to this function.
*/
function xmlrpc_server_list_methods() {
$xmlrpc_server = xmlrpc_server_get();
return array_keys($xmlrpc_server->callbacks);
}
/**
* XML-RPC method system.getCapabilities maps to this function.
* See http://groups.yahoo.com/group/xml-rpc/message/2897
*/
function xmlrpc_server_get_capabilities() {
return array(
'xmlrpc' => array(
'specUrl' => 'http://www.xmlrpc.com/spec',
'specVersion' => 1
),
'faults_interop' => array(
'specUrl' => 'http://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php',
'specVersion' => 20010516
),
'system.multicall' => array(
'specUrl' => 'http://www.xmlrpc.com/discuss/msgReader$1208',
'specVersion' => 1
),
'introspection' => array(
'specUrl' => 'http://scripts.incutio.com/xmlrpc/introspection.html',
'specVersion' => 1
)
);
}
/**
* XML-RPC method system.methodSignature maps to this function.
*
* @param $methodname
* Name of method for which we return a method signature.
* @return array
* An array of types representing the method signature of the
* function that the methodname maps to. The methodSignature of
* this function is 'array', 'string' because it takes an array
* and returns a string.
*/
function xmlrpc_server_method_signature($methodname) {
$xmlrpc_server = xmlrpc_server_get();
if (!isset($xmlrpc_server->callbacks[$methodname])) {
return xmlrpc_error(-32601, t('Server error. Requested method %methodname not specified.', array("%methodname" => $methodname)));
}
if (!is_array($xmlrpc_server->signatures[$methodname])) {
return xmlrpc_error(-32601, t('Server error. Requested method %methodname signature not specified.', array("%methodname" => $methodname)));
}
// We array of types
$return = array();
foreach ($xmlrpc_server->signatures[$methodname] as $type) {
$return[] = $type;
}
return $return;
}
/**
* XML-RPC method system.methodHelp maps to this function.
*
* @param $method
* Name of method for which we return a help string.
*/
function xmlrpc_server_method_help($method) {
$xmlrpc_server = xmlrpc_server_get();
return $xmlrpc_server->help[$method];
}
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