Tag: Proxy

GitHub and NuGet

I want to use DynamicObject-derived types to execute REST API / NodeJS module calls. It would also help to capture the API form in a strictly typed way. So here's an interface proxy that hides low-level machines that do tricks like this:

(TestMethod)
public void Call()
{
    dynamic c = new ExpandoObject();
    c.Add = (Func)((a, b) => a + b);

    ICalculator proxy = Proxy.Create(c);
    Assert.AreEqual(3, proxy.Add(1, 2));
}

public interface ICalculator
{
   int Add(int a, int b);
}

Library code is:

using Castle.DynamicProxy;
using Dynamitey;
using System;

namespace Dynoproxy
{
    public static class Proxy
    {
        public static T Create(this object source) where T : class
        {
            var proxyGenerator = new ProxyGenerator();
            return proxyGenerator.CreateInterfaceProxyWithoutTarget(
                ProxyGenerationOptions.Default,
                new Interceptor(source));
        }

        class Interceptor : IInterceptor
        {
            public Interceptor(object target) => Target = target;
            object Target { get; }
            public void Intercept(IInvocation invocation) =>
                invocation.ReturnValue = Dynamic.InvokeMember(
                    Target, invocation.Method.Name, invocation.Arguments);
        }
    }
}