在C# UWP中创建Web服务器

Question

我正在使用C#编写一个作为通用Windows平台应用程序的Web服务器。以下是我的代码：

sealed partial class App : Application
    {
        int port = 8000;

        /// <summary>
        /// Initializes the singleton application object.  This is the first line of authored code
        /// executed, and as such is the logical equivalent of main() or WinMain().
        /// </summary>
        public App()
        {
            StartServer();
        }

        private void StartServer()
        {
            StreamSocketListener listener = new StreamSocketListener();
            listener.BindServiceNameAsync(port.ToString());
            Debug.WriteLine("Bound to port: " + port.ToString());
            listener.ConnectionReceived += async (s, e) =>
                {
                    Debug.WriteLine("Got connection");
                    using (IInputStream input = e.Socket.InputStream)
                    {
                        var buffer = new Windows.Storage.Streams.Buffer(2);
                        await input.ReadAsync(buffer, buffer.Capacity, InputStreamOptions.Partial);       
                    }

                    using (IOutputStream output = e.Socket.OutputStream)
                    {
                        using (Stream response = output.AsStreamForWrite())
                        {
                            response.Write(Encoding.ASCII.GetBytes("Hello, World!"), 0, 1);
                        }
                    }
                };
        }
    }

我尝试使用以下地址连接服务器:

http://127.0.0.1:8000/C:/pathtohtmlfile/htmlfile.html

然而，连接超时了。我不确定是C#代码出了问题还是其他原因。

- M3579

---

你看过这个吗：http://loopback.codeplex.com/？ WinRT和UWP应用程序有一个回环保护，该工具将为指定的应用程序删除它。也许这就是你需要的。 - MrCSharp

很不幸，loopback异常仅适用于客户端套接字。 - George Birbilis

Answer 1

Raymond Zuo的解决方案真的很有效。但是不要忘记在Packages.appxmanifest中添加权限。为了在私有网络中运行服务器，应该添加以下内容：

<Capability Name="privateNetworkClientServer" />

为了在公共网络中运行服务器：

<Capability Name="internetClientServer" />

- NDrewBy

Answer 2

如果你想在uwp应用中托管服务器，请确保以下几点：

1. your device which run this code (Device A) and device which your web browser run (Device B) must at a same LAN. And you cannot use the browser in Device A to access your service.
2. use WIFI to access your service.
3. your app must be at the state of running.

4. you should write a method to get ip address, but not 127.0.0.1:

   public static string FindIPAddress()
   {
       List<string> ipAddresses = new List<string>();
       var hostnames = NetworkInformation.GetHostNames();
       foreach (var hn in hostnames)
       {
           //IanaInterfaceType == 71 => Wifi
           //IanaInterfaceType == 6 => Ethernet (Emulator)
           if (hn.IPInformation != null && 
               (hn.IPInformation.NetworkAdapter.IanaInterfaceType == 71 
               || hn.IPInformation.NetworkAdapter.IanaInterfaceType == 6))
           {
               string ipAddress = hn.DisplayName;
               ipAddresses.Add(ipAddress);
           }
       }
   
       if (ipAddresses.Count < 1)
       {
           return null;
       }
       else if (ipAddresses.Count == 1)
       {
           return ipAddresses[0];
       }
       else
       {
           return ipAddresses[ipAddresses.Count - 1];
       }
   }
   

   It is possible to host a web service on phone/tablet.

- Raymond Zuo

---

你有WinRT中托管Web服务的示例吗？我找到的所有内容都根本不起作用。 - CodeNoob

我喜欢"else if"和"else"的构造，它们看起来毫无意义 ;-D - Jens Marchewka

Answer 3

可以在Windows通用应用程序中托管Web服务。我按照http://www.dzhang.com/blog/2012/09/18/a-simple-in-process-http-server-for-windows-8-metro-apps的示例进行操作，还遵循了Raymond Zuo解决方案的前三个步骤，最后我也关闭了防火墙。不幸的是，即使我按照这里的答案Cannot connect to localhost in windows store application的回答进行操作，我仍然无法在本地主机上运行。目前，我正在对通用平台应用程序执行Java HTTP请求。显然，服务器和客户端似乎需要在不同的主机上运行。

- Andrés Vargas González