如何在Mule 3中构建一个简单的Web代理？

<http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8081" doc:name="HTTP Listener Configuration"/>

<http:request-config name="HTTP_Request_Configuration" host="www.example.com" port="80" doc:name="HTTP Request Configuration"/>

<flow name="web-proxyFlow">
    <http:listener config-ref="HTTP_Listener_Configuration" path="/" doc:name="HTTP"/>
    <http:request config-ref="HTTP_Request_Configuration" path="#[message.inboundProperties.'http.request.path']" method="#[message.inboundProperties.'http.method']" doc:name="HTTP Request"/>
   <logger message="Proxying request to #[message.inboundProperties.'http.request.path']" level="INFO" doc:name="Logger"/>
</flow>