diff -r 000000000000 -r d970ebf37754 wp/wp-includes/class-wp-http-ixr-client.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/class-wp-http-ixr-client.php	Wed Nov 06 03:21:17 2013 +0000
@@ -0,0 +1,92 @@
+<?php
+/**
+ * WP_HTTP_IXR_Client
+ *
+ * @package WordPress
+ * @since 3.1.0
+ *
+ */
+class WP_HTTP_IXR_Client extends IXR_Client {
+
+	function __construct($server, $path = false, $port = false, $timeout = 15) {
+		if ( ! $path ) {
+			// Assume we have been given a URL instead
+			$bits = parse_url($server);
+			$this->scheme = $bits['scheme'];
+			$this->server = $bits['host'];
+			$this->port = isset($bits['port']) ? $bits['port'] : $port;
+			$this->path = !empty($bits['path']) ? $bits['path'] : '/';
+
+			// Make absolutely sure we have a path
+			if ( ! $this->path )
+				$this->path = '/';
+		} else {
+			$this->scheme = 'http';
+			$this->server = $server;
+			$this->path = $path;
+			$this->port = $port;
+		}
+		$this->useragent = 'The Incutio XML-RPC PHP Library';
+		$this->timeout = $timeout;
+	}
+
+	function query() {
+		$args = func_get_args();
+		$method = array_shift($args);
+		$request = new IXR_Request($method, $args);
+		$xml = $request->getXml();
+
+		$port = $this->port ? ":$this->port" : '';
+		$url = $this->scheme . '://' . $this->server . $port . $this->path;
+		$args = array(
+			'headers'    => array('Content-Type' => 'text/xml'),
+			'user-agent' => $this->useragent,
+			'body'       => $xml,
+		);
+
+		// Merge Custom headers ala #8145
+		foreach ( $this->headers as $header => $value )
+			$args['headers'][$header] = $value;
+
+		if ( $this->timeout !== false )
+			$args['timeout'] = $this->timeout;
+
+		// Now send the request
+		if ( $this->debug )
+			echo '<pre class="ixr_request">' . htmlspecialchars($xml) . "\n</pre>\n\n";
+
+		$response = wp_remote_post($url, $args);
+
+		if ( is_wp_error($response) ) {
+			$errno    = $response->get_error_code();
+			$errorstr = $response->get_error_message();
+			$this->error = new IXR_Error(-32300, "transport error: $errno $errorstr");
+			return false;
+		}
+
+		if ( 200 != wp_remote_retrieve_response_code( $response ) ) {
+			$this->error = new IXR_Error(-32301, 'transport error - HTTP status code was not 200 (' . wp_remote_retrieve_response_code( $response ) . ')');
+			return false;
+		}
+
+		if ( $this->debug )
+			echo '<pre class="ixr_response">' . htmlspecialchars( wp_remote_retrieve_body( $response ) ) . "\n</pre>\n\n";
+
+		// Now parse what we've got back
+		$this->message = new IXR_Message( wp_remote_retrieve_body( $response ) );
+		if ( ! $this->message->parse() ) {
+			// XML error
+			$this->error = new IXR_Error(-32700, 'parse error. not well formed');
+			return false;
+		}
+
+		// Is the message a fault?
+		if ( $this->message->messageType == 'fault' ) {
+			$this->error = new IXR_Error($this->message->faultCode, $this->message->faultString);
+			return false;
+		}
+
+		// Message must be OK
+		return true;
+	}
+}