来自Azure函数的TcpIp通信？

Question

我有一个azure队列触发器函数，它具有以下代码：

using (var client = new TcpClient(AddressFamily.InterNetworkV6))
{
   client.Client.DualMode = true;
   client.Connect(endpoint);

   var data = Encoding.ASCII.GetBytes("test");

   using (var outStream = client.GetStream())
   {
        outStream.Write(data, 0, data.Length);
   }
}

我得到的错误是：

连接尝试失败是因为连接方在一段时间后没有正确响应，或者已建立的连接失败是因为连接主机未能响应。

端点地址看起来是正确的，当我在本地调试时，此代码可以工作，因此我怀疑azure服务器可能不允许出站连接。

你知不知道为何这种联系不起作用？

Update：这仍然不起作用，我已经尝试以以下方式生成客户机：

// DualMode IPV6
var client = new TcpClient(AddressFamily.InterNetworkV6);
client.Client.DualMode = true;
client.Connect(endpoint);

// SingleMode Internetwork
var client = new TcpClient(AddressFamily.InterNetwork);
client.Connect(endpoint);

// Just Endpoint
var client = new TcpClient(endpoint);
client.Connect(endpoint);

// Normal
var client = new TcpClient(hostAddress, port);

// Forced IPV6
var client = new TcpClient("::ffff:" + hostAddress, port);

在本地调试时，除了“强制IPV6”之外，所有这些方法都能正常工作。在服务器上，我得到以下错误：

== DualMode IPV6
    Failed PingBack: A connection attempt failed because the connected party did not properly 
    respond after a period of time, or established connection failed because connected host 
    has failed to respond [::ffff:204.16.184.62]:3164

== SingleMode Internetwork
    Failed PingBack: A connection attempt failed because the connected party did not properly 
    respond after a period of time, or established connection failed because connected host 
    has failed to respond 204.16.184.62:3164

== Just Endpoint
    Failed PingBack: The requested address is not valid in its context

== Normal
    Failed PingBack: A connection attempt failed because the connected party did not properly 
    respond after a period of time, or established connection failed because connected host 
    has failed to respond 204.16.184.62:3164

== Forced IPV6
    Failed PingBack: The requested address is not valid in its context [::ffff:204.16.184.62]:3164

Answer 1

看看您的TcpClient实例，

var client =新的TcpClient(AddressFamily.InterNetworkV6)

Azure函数中还没有IPv6。将您的AddressFamily切换到v4：

var client = new TcpClient(AddressFamily.InterNetwork)

在App /Functions中，对出站取消没有限制。