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-rw-r--r--engine/lib/xml-rpc.php510
1 files changed, 510 insertions, 0 deletions
diff --git a/engine/lib/xml-rpc.php b/engine/lib/xml-rpc.php
new file mode 100644
index 000000000..d6a391fce
--- /dev/null
+++ b/engine/lib/xml-rpc.php
@@ -0,0 +1,510 @@
+<?php
+ /**
+ * Elgg XML-RPC library.
+ * Contains functions and classes to handle XML-RPC services, currently only server only.
+ *
+ * @package Elgg
+ * @subpackage Core
+ * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
+ * @author Marcus Povey
+ * @copyright Curverider Ltd 2008
+ * @link http://elgg.org/
+ */
+
+ // XMLRPC Call ////////////////////////////////////////////////////////////////////////////
+
+ /**
+ * @class XMLRPCCall
+ * This class represents
+ * @author Marcus Povey
+ */
+ class XMLRPCCall
+ {
+ /** Method name */
+ private $methodname;
+ /** Parameters */
+ private $params;
+
+ /**
+ * Construct a new XML RPC Call
+ *
+ * @param string $xml
+ */
+ function __construct($xml)
+ {
+ $this->parse($xml);
+ }
+
+ /**
+ * Return the method name associated with the call.
+ *
+ * @return string
+ */
+ public function getMethodName() { return $this->methodname; }
+
+ /**
+ * Return the parameters.
+ * Returns a nested array of XmlElement.
+ *
+ * @see XmlElement
+ * @return array
+ */
+ public function getParameters() { return $this->params; }
+
+ /**
+ * Parse the xml into its components according to spec.
+ * This first version is a little primitive.
+ *
+ * @param string $xml
+ */
+ private function parse($xml)
+ {
+ $xml = xml_2_object($xml);
+
+ // sanity check
+ if ((isset($xml->name)) && (strcasecmp($xml->name, "methodCall")!=0))
+ throw new CallException(elgg_echo('CallException:NotRPCCall'));
+
+ // method name
+ $this->methodname = $xml->children[0]->content;
+
+ // parameters
+ $this->params = $xml->children[1]->children;
+
+ print_r($this);
+ }
+ }
+
+ // Response classes ///////////////////////////////////////////////////////////////////////
+
+ /**
+ * @class XMLRPCParameter Superclass for all RPC parameters.
+ * @author Marcus Povey
+ */
+ abstract class XMLRPCParameter
+ {
+ protected $value;
+
+ function __construct() { }
+
+ }
+
+ /**
+ * @class XMLRPCIntParameter An Integer.
+ * @author Marcus Povey
+ */
+ class XMLRPCIntParameter extends XMLRPCParameter
+ {
+ function __construct($value)
+ {
+ parent::__construct();
+
+ $this->value = (int)$value;
+ }
+
+ function __toString()
+ {
+ return "<value><i4>{$this->value}</i4></value>\n";
+ }
+ }
+
+ /**
+ * @class XMLRPCBoolParameter A boolean.
+ * @author Marcus Povey
+ */
+ class XMLRPCBoolParameter extends XMLRPCParameter
+ {
+ function __construct($value)
+ {
+ parent::__construct();
+
+ $this->value = (bool)$value;
+ }
+
+ function __toString()
+ {
+ $code = ($this->value) ? "1" : "0";
+ return "<value><boolean>{$code}</boolean></value>\n";
+ }
+ }
+
+ /**
+ * @class XMLRPCStringParameter A string.
+ * @author Marcus Povey
+ */
+ class XMLRPCStringParameter extends XMLRPCParameter
+ {
+ function __construct($value)
+ {
+ parent::__construct();
+
+ $this->value = $value;
+ }
+
+ function __toString()
+ {
+ $value = htmlentities($this->value);
+ return "<value><string>{$value}</string></value>\n";
+ }
+ }
+
+ /**
+ * @class XMLRPCDoubleParameter A double precision signed floating point number.
+ * @author Marcus Povey
+ */
+ class XMLRPCDoubleParameter extends XMLRPCParameter
+ {
+ function __construct($value)
+ {
+ parent::__construct();
+
+ $this->value = (float)$value;
+ }
+
+ function __toString()
+ {
+ return "<value><double>{$this->value}</double></value>\n";
+ }
+ }
+
+ /**
+ * @class XMLRPCDateParameter An ISO8601 data and time.
+ * @author Marcus Povey
+ */
+ class XMLRPCDateParameter extends XMLRPCParameter
+ {
+ /**
+ * Construct a date
+ *
+ * @param int $timestamp The unix timestamp, or blank for "now".
+ */
+ function __construct($timestamp = 0)
+ {
+ parent::__construct();
+
+ $this->value = $timestamp;
+ if (!$timestamp)
+ $this->value = time();
+ }
+
+ function __toString()
+ {
+ $value = date('c', $this->value);
+ return "<value><dateTime.iso8601>{$value}</dateTime.iso8601></value>\n";
+ }
+ }
+
+ /**
+ * @class XMLRPCBase64Parameter A base 64 encoded blob of binary.
+ * @author Marcus Povey
+ */
+ class XMLRPCBase64Parameter extends XMLRPCParameter
+ {
+ /**
+ * Construct a base64 encoded block
+ *
+ * @param string $blob Unencoded binary blob
+ */
+ function __construct($blob)
+ {
+ parent::__construct();
+
+ $this->value = base64_encode($blob);
+ }
+
+ function __toString()
+ {
+ return "<value><base64>{$value}</base64></value>\n";
+ }
+ }
+
+ /**
+ * @class XMLRPCStructParameter A structure containing other XMLRPCParameter objects.
+ * @author Marcus Povey
+ */
+ class XMLRPCStructParameter extends XMLRPCParameter
+ {
+ /**
+ * Construct a struct.
+ *
+ * @param array $parameters Optional associated array of parameters, if not provided then addField must be used.
+ */
+ function __construct($parameters = NULL)
+ {
+ parent::__construct();
+
+ if (is_array($parameters))
+ {
+ foreach ($parameters as $k => $v)
+ $this->addField($k, $v);
+ }
+ }
+
+ /**
+ * Add a field to the container.
+ *
+ * @param string $name The name of the field.
+ * @param XMLRPCParameter $value The value.
+ */
+ public function addField($name, XMLRPCParameter $value)
+ {
+ if (!is_array($this->value))
+ $this->value = array();
+
+ $this->value[$name] = $value;
+ }
+
+ function __toString()
+ {
+ $params = "";
+ foreach ($this->value as $k => $v)
+ {
+ $params .= "<member><name>$k</name>$v</member>";
+ }
+
+ return <<< END
+<struct>
+ $params
+</struct>
+END;
+ }
+ }
+
+ /**
+ * @class XMLRPCArrayParameter An array containing other XMLRPCParameter objects.
+ * @author Marcus Povey
+ */
+ class XMLRPCArrayParameter extends XMLRPCParameter
+ {
+ /**
+ * Construct an array.
+ *
+ * @param array $parameters Optional array of parameters, if not provided then addField must be used.
+ */
+ function __construct($parameters = NULL)
+ {
+ parent::__construct();
+
+ if (is_array($parameters))
+ {
+ foreach ($parameters as $v)
+ $this->addField($v);
+ }
+ }
+
+ /**
+ * Add a field to the container.
+ *
+ * @param XMLRPCParameter $value The value.
+ */
+ public function addField(XMLRPCParameter $value)
+ {
+ if (!is_array($this->value))
+ $this->value = array();
+
+ $this->value[] = $value;
+ }
+
+ function __toString()
+ {
+ $params = "";
+ foreach ($this->value as $value)
+ {
+ $params .= "$value";
+ }
+
+ return <<< END
+<array>
+ <data>
+ $params
+ </data>
+</array>
+END;
+ }
+ }
+
+ /**
+ * @class XMLRPCResponse XML-RPC Response.
+ * @author Marcus Povey
+ */
+ abstract class XMLRPCResponse
+ {
+ /** An array of parameters */
+ protected $parameters = array();
+
+ /**
+ * Add a parameter here.
+ *
+ * @param XMLRPCParameter $param The parameter.
+ */
+ public function addParameter(XMLRPCParameter $param)
+ {
+ if (!is_array($this->parameters))
+ $this->parameters = array();
+
+ $this->parameters[] = $param;
+ }
+
+ public function addInt($value) { $this->addParameter(new XMLRPCIntParameter($value)); }
+ public function addString($value) { $this->addParameter(new XMLRPCStringParameter($value)); }
+ public function addDouble($value) { $this->addParameter(new XMLRPCDoubleParameter($value)); }
+ public function addBoolean($value) { $this->addParameter(new XMLRPCBoolParameter($value)); }
+ }
+
+ /**
+ * @class XMLRPCSuccessResponse
+ * @author Marcus Povey
+ */
+ class XMLRPCSuccessResponse extends XMLRPCResponse
+ {
+ /**
+ * Output to XML.
+ */
+ public function __toString()
+ {
+ $params = "";
+ foreach ($this->parameters as $param)
+ $params .= "<param>$param</param>\n";
+
+ return <<< END
+<methodResponse>
+ <params>
+ $params
+ </params>
+</methodResponse>
+END;
+ }
+ }
+
+ /**
+ * @class XMLRPCErrorResponse
+ * @author Marcus Povey
+ */
+ class XMLRPCErrorResponse extends XMLRPCResponse
+ {
+ /**
+ * Set the error response and error code.
+ *
+ * @param string $message The message
+ * @param int $code Error code (default = system error as defined by http://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php)
+ */
+ function __construct($message, $code = -32400)
+ {
+ $this->addParameter(
+ new XMLRPCStructParameter(
+ array (
+ 'faultCode' => new XMLRPCIntParameter($code),
+ 'faultString' => new XMLRPCStringParameter($message)
+ )
+ )
+ );
+ }
+
+ /**
+ * Output to XML.
+ */
+ public function __toString()
+ {
+ return <<< END
+<methodResponse>
+ <fault>
+ <value>
+ {$this->parameters[0]}
+ </value>
+ </fault>
+</methodResponse>
+END;
+ }
+ }
+
+ // Functions for adding handlers //////////////////////////////////////////////////////////
+
+ /** XML-RPC Handlers */
+ $XML_RPC_HANDLERS = array();
+
+ /**
+ * Register a method handler for a given XML-RPC method.
+ *
+ * @param string $method Method parameter.
+ * @param string $handler The handler function. This function accepts once XMLRPCCall object and must return a XMLRPCResponse object.
+ * @return bool
+ */
+ function register_xmlrpc_handler($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
+ */
+ 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()]))
+ {
+ $result = $handler($parameters);
+
+ if (!($result instanceof XMLRPCResponse))
+ throw new InvalidParameterException(elgg_echo('InvalidParameterException:UnexpectedReturnFormat'));
+
+ // Result in right format, return it.
+ return $result;
+ }
+
+ // if no handler then throw exception
+ throw new NotImplementedException(sprintf(elgg_echo('NotImplementedException:XMLRPCMethodNotImplemented'), $method));
+ }
+
+ // Error handler functions ////////////////////////////////////////////////////////////////
+
+ /**
+ * 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 unknown_type $errno
+ * @param unknown_type $errmsg
+ * @param unknown_type $filename
+ * @param unknown_type $linenum
+ * @param unknown_type $vars
+ */
+ function __php_xmlrpc_error_handler($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 $exception
+ */
+ function __php_xmlrpc_exception_handler($exception) {
+
+ error_log("*** FATAL EXCEPTION (API) *** : " . $exception);
+
+ page_draw($exception->getMessage(), elgg_view("xml-rpc/output", array('result' => new XMLRPCErrorResponse($exception->getMessage(), $exception->getCode()==0 ? -32400 : $exception->getCode()))));
+ }
+?> \ No newline at end of file
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