<?php

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/**

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* IXR_IntrospectionServer

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*

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* @package IXR

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* @since 1.5.0

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*/

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class IXR_IntrospectionServer extends IXR_Server

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{

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var $signatures;

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var $help;

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/**

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* PHP5 constructor.

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*/

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function __construct()

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{

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$this->setCallbacks();

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$this->setCapabilities();

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$this->capabilities['introspection'] = array(

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'specUrl' => 'http://xmlrpc.usefulinc.com/doc/reserved.html',

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'specVersion' => 1

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);

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$this->addCallback(

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'system.methodSignature',

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'this:methodSignature',

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array('array', 'string'),

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'Returns an array describing the return type and required parameters of a method'

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);

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$this->addCallback(

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'system.getCapabilities',

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'this:getCapabilities',

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array('struct'),

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'Returns a struct describing the XML-RPC specifications supported by this server'

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);

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$this->addCallback(

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'system.listMethods',

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'this:listMethods',

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array('array'),

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'Returns an array of available methods on this server'

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);

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$this->addCallback(

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'system.methodHelp',

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'this:methodHelp',

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array('string', 'string'),

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'Returns a documentation string for the specified method'

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);

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}

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/**

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* PHP4 constructor.

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*/

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public function IXR_IntrospectionServer() {

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self::__construct();

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}

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function addCallback($method, $callback, $args, $help)

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{

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$this->callbacks[$method] = $callback;

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$this->signatures[$method] = $args;

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$this->help[$method] = $help;

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}

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function call($methodname, $args)

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{

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// Make sure it's in an array

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if ($args && !is_array($args)) {

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$args = array($args);

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}

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// Over-rides default call method, adds signature check

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if (!$this->hasMethod($methodname)) {

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return new IXR_Error(-32601, 'server error. requested method "'.$this->message->methodName.'" not specified.');

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}

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$method = $this->callbacks[$methodname];

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$signature = $this->signatures[$methodname];

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$returnType = array_shift($signature);

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// Check the number of arguments

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if (count($args) != count($signature)) {

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return new IXR_Error(-32602, 'server error. wrong number of method parameters');

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}

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// Check the argument types

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$ok = true;

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$argsbackup = $args;

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for ($i = 0, $j = count($args); $i < $j; $i++) {

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$arg = array_shift($args);

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$type = array_shift($signature);

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switch ($type) {

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case 'int':

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case 'i4':

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if (is_array($arg) || !is_int($arg)) {

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$ok = false;

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}

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break;

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case 'base64':

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case 'string':

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if (!is_string($arg)) {

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$ok = false;

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}

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break;

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case 'boolean':

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if ($arg !== false && $arg !== true) {

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$ok = false;

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}

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break;

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case 'float':

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case 'double':

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if (!is_float($arg)) {

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$ok = false;

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}

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break;

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case 'date':

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case 'dateTime.iso8601':

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if (!is_a($arg, 'IXR_Date')) {

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$ok = false;

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}

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break;

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}

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if (!$ok) {

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return new IXR_Error(-32602, 'server error. invalid method parameters');

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}

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}

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// It passed the test - run the "real" method call

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return parent::call($methodname, $argsbackup);

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}

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function methodSignature($method)

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{

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if (!$this->hasMethod($method)) {

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return new IXR_Error(-32601, 'server error. requested method "'.$method.'" not specified.');

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}

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// We should be returning an array of types

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$types = $this->signatures[$method];

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$return = array();

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foreach ($types as $type) {

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switch ($type) {

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case 'string':

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$return[] = 'string';

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break;

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case 'int':

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case 'i4':

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$return[] = 42;

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break;

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case 'double':

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$return[] = 3.1415;

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break;

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case 'dateTime.iso8601':

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$return[] = new IXR_Date(time());

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break;

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case 'boolean':

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$return[] = true;

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break;

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case 'base64':

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$return[] = new IXR_Base64('base64');

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break;

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case 'array':

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$return[] = array('array');

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break;

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case 'struct':

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$return[] = array('struct' => 'struct');

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break;

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}

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}

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return $return;

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}

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function methodHelp($method)

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{

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return $this->help[$method];

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}

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}

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