ProxyKit服务器http反向代理应用

方法一：这个方法很漂亮，但是，有问题，不知道什么原因，cookie偶尔会收不到，而造成验证错误，提交内容也会错误

扩展类：

    public class MyTypedHandler : IProxyHandler
    {
        private IConfiguration _upstreamHostLookup;

        public MyTypedHandler(IConfiguration upstreamHostLookup)
        {
            _upstreamHostLookup = upstreamHostLookup;
        }

        public Task<HttpResponseMessage> HandleProxyRequest(HttpContext context)
        {

            var host = context.Request.Host;
            //var upstreamHost = _upstreamHostLookup.Find(context);
            //return context
            //    .ForwardTo(upstreamHost)
            //    .AddXForwardedHeaders()
            //    .Send();
            //context.Request.Host = new HostString("localhost");
            if (host.Host == "localhost:8088")
            {
                return context.ForwardTo(new UpstreamHost("http://localhost")).AddXForwardedHeaders().Send();
            }
            else
            {
                return context.ForwardTo(new UpstreamHost("http://localhost:8081")).AddXForwardedHeaders().Send();
            }
            ;
        }
    }

在 public void ConfigureServices(IServiceCollection services)加入：

            services.AddHttpClient();

            services.AddSingleton<MyTypedHandler>();

在 public void Configure(IApplicationBuilder app, IHostingEnvironment env) 加入：

app.RunProxy<MyTypedHandler>();

方法二：稳定，暂时没发现什么问题（似乎不支持https，https出错）

在 public void ConfigureServices(IServiceCollection services) 加入：

services.AddProxy();

在 public void Configure(IApplicationBuilder app, IHostingEnvironment env) 加入：

            app.RunProxy(async context =>
            {
                if (context.Request.Host.Host == "localhost")
                {
                    var response = await context
                        .ForwardTo("http://localhost")
                        .Send();
                //response.Headers.Remove("MachineID");
                return response;
                }
                else
                {
                    var response = await context
                        .ForwardTo("http://localhost:8080/")
                        .Send();
                    //response.Headers.Remove("MachineID");
                    return response;
                }
            });