c# - 读取所有字节后 TcpListener 挂起

Question

我正在尝试使用 TcpListener 来收听一些数据。

我正在发送此请求(来自 Fiddler):

GET http://localhost:10000/ HTTP/1.1
User-Agent: Fiddler
Host: localhost:10000

监听器在这里:

internal static class Program
{
    private static void Main(string[] args)
    {
        const int PORT = 10000;
        var ipAddressParts = new byte[] {127, 0, 0, 1};
        var ipAddress = new IPAddress(ipAddressParts);
        var server = new TcpListener(ipAddress, PORT);

        const int BUFFER_SIZE = 256;
        Console.WriteLine($"Starting on {ipAddress}:{PORT}.");
        server.Start();
        while (true)
        {
            var client = server.AcceptTcpClient();
            Console.WriteLine("Client accepted");

            var stream = client.GetStream();

            var readCount = default(int);
            var data = new List<byte[]>();

            do
            {
                var buffer = new byte[BUFFER_SIZE];

                readCount = stream.Read(buffer, 0, buffer.Length);  // Read hanging here.
                Console.WriteLine($"Received {readCount} bytes.");
                if (readCount != 0)
                {
                    Console.WriteLine(ASCII.GetString(buffer));
                }

                data.Add(buffer);
            } while (readCount != 0);

            var message = ASCII.GetBytes($"{DateTime.Now:D} Hello World!!!");
            stream.Write(message, 0, message.Length);
            stream.Close();
        }
    }
}

监听器按预期工作并接收并打印消息，输出:

Starting on 127.0.0.1:10000.
Client accepted
Received 62 bytes.
GET / HTTP/1.1
User-Agent: Fiddler
Host: localhost:10000

但是，它会在下一个循环中的下一个读取操作挂起。我知道没有更多数据要读取，所以我希望它为读取的字节返回零，然后退出循环。

MSDN Documentation暗示这是使用它的正确方法。

我应该使用什么条件来检查读取结束？

Answer 1

在您的 do-while 循环检查中，使用 DataAvailable 属性而不是您自己的 readCount。可在此处找到文档:https://learn.microsoft.com/en-us/dotnet/api/system.net.sockets.networkstream.dataavailable?view=netframework-4.8 这看起来像:

做{ ... } while (stream.DataAvailable);