?<h3>D¨ızenle: class-IXR-introspectionserver.php</h3>
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/**
 * IXR_IntrospectionServer
 *
 * @package IXR
 * @since 1.5.0
 */
class IXR_IntrospectionServer extends IXR_Server
{
    var $signatures;
    var $help;

	/**
	 * PHP5 constructor.
	 */
    function __construct()
    {
        $this-&gt;setCallbacks();
        $this-&gt;setCapabilities();
        $this-&gt;capabilities[&#039;introspection&#039;] = array(
            &#039;specUrl&#039; =&gt; &#039;http://xmlrpc.usefulinc.com/doc/reserved.html&#039;,
            &#039;specVersion&#039; =&gt; 1
        );
        $this-&gt;addCallback(
            &#039;system.methodSignature&#039;,
            &#039;this:methodSignature&#039;,
            array(&#039;array&#039;, &#039;string&#039;),
            &#039;Returns an array describing the return type and required parameters of a method&#039;
        );
        $this-&gt;addCallback(
            &#039;system.getCapabilities&#039;,
            &#039;this:getCapabilities&#039;,
            array(&#039;struct&#039;),
            &#039;Returns a struct describing the XML-RPC specifications supported by this server&#039;
        );
        $this-&gt;addCallback(
            &#039;system.listMethods&#039;,
            &#039;this:listMethods&#039;,
            array(&#039;array&#039;),
            &#039;Returns an array of available methods on this server&#039;
        );
        $this-&gt;addCallback(
            &#039;system.methodHelp&#039;,
            &#039;this:methodHelp&#039;,
            array(&#039;string&#039;, &#039;string&#039;),
            &#039;Returns a documentation string for the specified method&#039;
        );
    }

	/**
	 * PHP4 constructor.
	 */
	public function IXR_IntrospectionServer() {
		self::__construct();
	}

    function addCallback($method, $callback, $args, $help)
    {
        $this-&gt;callbacks[$method] = $callback;
        $this-&gt;signatures[$method] = $args;
        $this-&gt;help[$method] = $help;
    }

    function call($methodname, $args)
    {
        // Make sure it&#039;s in an array
        if ($args &amp;&amp; !is_array($args)) {
            $args = array($args);
        }

        // Over-rides default call method, adds signature check
        if (!$this-&gt;hasMethod($methodname)) {
            return new IXR_Error(-32601, &#039;server error. requested method &quot;&#039;.$this-&gt;message-&gt;methodName.&#039;&quot; not specified.&#039;);
        }
        $method = $this-&gt;callbacks[$methodname];
        $signature = $this-&gt;signatures[$methodname];
        $returnType = array_shift($signature);

        // Check the number of arguments
        if (count($args) != count($signature)) {
            return new IXR_Error(-32602, &#039;server error. wrong number of method parameters&#039;);
        }

        // Check the argument types
        $ok = true;
        $argsbackup = $args;
        for ($i = 0, $j = count($args); $i &lt; $j; $i++) {
            $arg = array_shift($args);
            $type = array_shift($signature);
            switch ($type) {
                case &#039;int&#039;:
                case &#039;i4&#039;:
                    if (is_array($arg) || !is_int($arg)) {
                        $ok = false;
                    }
                    break;
                case &#039;base64&#039;:
                case &#039;string&#039;:
                    if (!is_string($arg)) {
                        $ok = false;
                    }
                    break;
                case &#039;boolean&#039;:
                    if ($arg !== false &amp;&amp; $arg !== true) {
                        $ok = false;
                    }
                    break;
                case &#039;float&#039;:
                case &#039;double&#039;:
                    if (!is_float($arg)) {
                        $ok = false;
                    }
                    break;
                case &#039;date&#039;:
                case &#039;dateTime.iso8601&#039;:
                    if (!is_a($arg, &#039;IXR_Date&#039;)) {
                        $ok = false;
                    }
                    break;
            }
            if (!$ok) {
                return new IXR_Error(-32602, &#039;server error. invalid method parameters&#039;);
            }
        }
        // It passed the test - run the &quot;real&quot; method call
        return parent::call($methodname, $argsbackup);
    }

    function methodSignature($method)
    {
        if (!$this-&gt;hasMethod($method)) {
            return new IXR_Error(-32601, &#039;server error. requested method &quot;&#039;.$method.&#039;&quot; not specified.&#039;);
        }
        // We should be returning an array of types
        $types = $this-&gt;signatures[$method];
        $return = array();
        foreach ($types as $type) {
            switch ($type) {
                case &#039;string&#039;:
                    $return[] = &#039;string&#039;;
                    break;
                case &#039;int&#039;:
                case &#039;i4&#039;:
                    $return[] = 42;
                    break;
                case &#039;double&#039;:
                    $return[] = 3.1415;
                    break;
                case &#039;dateTime.iso8601&#039;:
                    $return[] = new IXR_Date(time());
                    break;
                case &#039;boolean&#039;:
                    $return[] = true;
                    break;
                case &#039;base64&#039;:
                    $return[] = new IXR_Base64(&#039;base64&#039;);
                    break;
                case &#039;array&#039;:
                    $return[] = array(&#039;array&#039;);
                    break;
                case &#039;struct&#039;:
                    $return[] = array(&#039;struct&#039; =&gt; &#039;struct&#039;);
                    break;
            }
        }
        return $return;
    }

    function methodHelp($method)
    {
        return $this-&gt;help[$method];
    }
}
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