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namespace Nwc.XmlRpc
{
using System;
using System.Runtime.Remoting.Proxies;
using System.Runtime.Remoting.Messaging;
/// <summary>This class provides support for creating local proxies of XML-RPC remote objects</summary>
/// <remarks>
/// To create a local proxy you need to create a local C# interface and then, via <i>createProxy</i>
/// associate that interface with a remote object at a given URL.
/// </remarks>
public class XmlRpcClientProxy : RealProxy
{
private String _remoteObjectName;
private String _url;
private XmlRpcRequest _client = new XmlRpcRequest();
/// <summary>Factory method to create proxies.</summary>
/// <remarks>
/// To create a local proxy you need to create a local C# interface with methods that mirror those of the server object.
/// Next, pass that interface into <c>createProxy</c> along with the object name and URL of the remote object and
/// cast the resulting object to the specifice interface.
/// </remarks>
/// <param name="remoteObjectName"><c>String</c> The name of the remote object.</param>
/// <param name="url"><c>String</c> The URL of the remote object.</param>
/// <param name="anInterface"><c>Type</c> The typeof() of a C# interface.</param>
/// <returns><c>Object</c> A proxy for your specified interface. Cast to appropriate type.</returns>
public static Object createProxy(String remoteObjectName, String url, Type anInterface)
{
return new XmlRpcClientProxy(remoteObjectName, url, anInterface).GetTransparentProxy();
}
private XmlRpcClientProxy(String remoteObjectName, String url, Type t) : base(t)
{
_remoteObjectName = remoteObjectName;
_url = url;
}
/// <summary>The local method dispatcher - do not invoke.</summary>
override public IMessage Invoke(IMessage msg)
{
IMethodCallMessage methodMessage = (IMethodCallMessage)msg;
_client.MethodName = _remoteObjectName + "." + methodMessage.MethodName;
_client.Params.Clear();
foreach (Object o in methodMessage.Args)
_client.Params.Add(o);
try
{
Object ret = _client.Invoke(_url);
return new ReturnMessage(ret,null,0,
methodMessage.LogicalCallContext, methodMessage);
}
catch (Exception e)
{
return new ReturnMessage(e, methodMessage);
}
}
}
}
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