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<?php
namespace IXR\Server;
use IXR\DataType\Value;
use IXR\Exception\ServerException;
use IXR\Message\Error;
use IXR\Message\Message;
class Server
{
protected $callbacks = [];
protected $message;
protected $capabilities;
public function __construct($callbacks = false, $data = false, $wait = false)
{
$this->setCapabilities();
if ($callbacks) {
$this->callbacks = $callbacks;
}
$this->setCallbacks();
if (!$wait) {
$this->serve($data);
}
}
public function serve($data = false)
{
if (!$data) {
if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] !== 'POST') {
header('Content-Type: text/plain'); // merged from WP #9093
throw new ServerException('XML-RPC server accepts POST requests only.');
}
$data = file_get_contents('php://input');
}
$this->message = new Message($data);
if (!$this->message->parse()) {
$this->error(-32700, 'parse error. not well formed');
}
if ($this->message->messageType != 'methodCall') {
$this->error(-32600, 'server error. invalid xml-rpc. not conforming to spec. Request must be a methodCall');
}
$result = $this->call($this->message->methodName, $this->message->params);
// Is the result an error?
if ($result instanceof Error) {
$this->error($result);
}
// Encode the result
$r = new Value($result);
$resultxml = $r->getXml();
// Create the XML
$xml = <<<EOD
<methodResponse>
<params>
<param>
<value>
$resultxml
</value>
</param>
</params>
</methodResponse>
EOD;
// Send it
$this->output($xml);
}
protected function call($methodname, $args)
{
if (!$this->hasMethod($methodname)) {
return new Error(-32601, 'server error. requested method ' . $methodname . ' does not exist.');
}
$method = $this->callbacks[$methodname];
// Perform the callback and send the response
if (is_array($args) && count($args) == 1) {
// If only one parameter just send that instead of the whole array
$args = $args[0];
}
try {
// Are we dealing with a function or a method?
if (is_string($method) && substr($method, 0, 5) === 'this:') {
// It's a class method - check it exists
$method = substr($method, 5);
return $this->$method($args);
}
return call_user_func($method, $args);
} catch (\BadFunctionCallException $exception) {
return new Error(-32601, "server error. requested callable '{$method}' does not exist.");
}
}
public function error($error, $message = false)
{
// Accepts either an error object or an error code and message
if ($message && !is_object($error)) {
$error = new Error($error, $message);
}
$this->output($error->getXml());
}
public function output($xml)
{
$xml = '<?xml version="1.0"?>' . "\n" . $xml;
$length = strlen($xml);
header('Connection: close');
header('Content-Length: ' . $length);
header('Content-Type: text/xml');
header('Date: ' . date('r'));
echo $xml;
exit;
}
protected function hasMethod($method)
{
return in_array($method, array_keys($this->callbacks));
}
protected function setCapabilities()
{
// Initialises capabilities array
$this->capabilities = [
'xmlrpc' => [
'specUrl' => 'http://www.xmlrpc.com/spec',
'specVersion' => 1
],
'faults_interop' => [
'specUrl' => 'http://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php',
'specVersion' => 20010516
],
'system.multicall' => [
'specUrl' => 'http://www.xmlrpc.com/discuss/msgReader$1208',
'specVersion' => 1
],
];
}
public function getCapabilities($args)
{
return $this->capabilities;
}
public function setCallbacks()
{
$this->callbacks['system.getCapabilities'] = 'this:getCapabilities';
$this->callbacks['system.listMethods'] = 'this:listMethods';
$this->callbacks['system.multicall'] = 'this:multiCall';
}
public function listMethods($args)
{
// Returns a list of methods - uses array_reverse to ensure user defined
// methods are listed before server defined methods
return array_reverse(array_keys($this->callbacks));
}
public function multiCall($methodcalls)
{
// See http://www.xmlrpc.com/discuss/msgReader$1208
$return = [];
foreach ($methodcalls as $call) {
$method = $call['methodName'];
$params = $call['params'];
if ($method == 'system.multicall') {
$result = new Error(-32600, 'Recursive calls to system.multicall are forbidden');
} else {
$result = $this->call($method, $params);
}
if ($result instanceof Error) {
$return[] = [
'faultCode' => $result->code,
'faultString' => $result->message
];
} else {
$return[] = [$result];
}
}
return $return;
}
}
|
