C＃Socket.receive连续接收0个字节，并且不会在循环中阻塞

我试图用C＃编写一个最简单的多线程TCP服务器，它接收来自多个客户端的数据 .

每次连接新客户端时，都会 Build 套接字连接，并将套接字作为参数传递给新的类函数，之后while循环运行并接收数据直到客户端连接 .

这里的问题是“socket.receive”没有阻塞并且接收0字节的数据 . 因此循环连续运行，而不会阻塞socket.receive（代码中的“clientSocket.Receive（bb）” . ） .

我使用Chrome浏览器作为客户端进行测试 . 即使我使用任何其他客户端，TCP服务器的行为仍然是相同的 .

客户端仅发送一次数据，但服务器连续接收0字节，而循环继续运行 .

我粘贴服务器输出以供参考 .

请帮助阻塞socket.receive上的服务器以等待下一次客户端传输 . 奇怪的是，即使接收到0个字节，也不会调用异常 .

请帮忙 .

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;
Threading;
using System.Timers;
using System.Security;
using System.Security.Permissions;
namespace SERVER
{
    static class Constants
    {
        public const int port = 8080;
        public const int buffer_size = 512;


    }
    class Program
    {
        static public string LocalIPAddress()
        {
            IPHostEntry host;
            string localIP = "";
            host = Dns.GetHostEntry(Dns.GetHostName());
            foreach (IPAddress ip in host.AddressList)
            {
                if (ip.AddressFamily == AddressFamily.InterNetwork)
                {
                    localIP = ip.ToString();
                    break;
                }
            }
            return localIP;
            //return ip;
        }

        static void Main(string[] args)
        {
            //IPEndPoint ipObj = new IPEndPoint(IPAddress.Parse("Server IP goes here"), 20487); //20487 is port. you can change it according to your wish
            System.Net.IPAddress IP = IPAddress.Any;
            int port = Constants.port;
            TcpListener listnerObj = new TcpListener(IP, port);
            listnerObj.Start();
            string client_addr;
            string[] client_addr_split;
            string IP_string = LocalIPAddress();

            Console.WriteLine("Server Started on {0}:{1}", IP_string, port);
            while (true)
            {
                Console.WriteLine("================================");
                Console.WriteLine("**    Waiting For Client     **");
                Socket clientSocket = listnerObj.AcceptSocket(); // waiting for the client to connect

                client_addr = clientSocket.RemoteEndPoint.ToString();
                client_addr_split = client_addr.Split(':');
                client_addr = client_addr_split[0];

                Console.WriteLine("Client Connected {0}", client_addr);
                ParameterizedThreadStart thread = delegate { new communication().doCommunicate(clientSocket, client_addr); };
                Thread th = new Thread(thread);
                th.Start(); // start the thread here 
            }
        }

        class communication
        {
            public int byteReceived;
            public byte[] bb;
            public void doCommunicate(Socket clientSocket, string client_addr)
            {
                clientSocket.Blocking = true;
                bb = new byte[Constants.buffer_size];

                //Console.WriteLine("***** Entered DoCommunicate *****");
                while (clientSocket.Connected)
                {
                    //Console.WriteLine("Entered While");
                    try
                    {
                        //Console.WriteLine("Entered TRY");
                        Console.WriteLine("Waiting to recieve Data from IP : client_addr");
                        //int ReceivedDataLength = Client.Receive(ReceivedBytes, 0, ReceivedBytes.Length, SocketFlags.None);
                        byteReceived = clientSocket.Receive(bb, 0, bb.Length, SocketFlags.None);
                        //byteReceived = clientSocket.Receive(bb);
                    }
                    catch (SocketException e)
                    {
                        Console.WriteLine("Error: Socket Exception.\n{0}\n{1}.", e.Message, e.ErrorCode);
                        break;
                    }
                    catch (ArgumentNullException e)
                    {
                        Console.WriteLine("Error : Argument Null Exception.\n{0}", e.Message);
                        break;
                    }
                    catch (ObjectDisposedException e)
                    {
                        Console.WriteLine("Error : Socket Disposed Exception Caught.\n{0}", e.Message);
                        break;
                    }
                    catch (SecurityException e)
                    {
                        Console.WriteLine("Error: Security Exception.\n{0}", e.Message);
                        break;
                    }
                    //clientSocketglobal.Send(Encoding.Default.GetBytes("Hello Client"), SocketFlags.None);
                    Console.WriteLineWriteLine("Received Byte count : {0}, from IP : {1}", byteReceived, client_addr); // Do whatever you want to do with the data recieved. Parsing and storing etc.
                    Console.WriteLine(Encoding.UTF8.GetString(bb));
                }
                //Console.WriteLine("While Loop Exited");
                Console.WriteLine("Socked and Class Object  Disposed");
                clientSocket.Close();
                clientSocket.Dispose();
                GC.Collect();
            }
        }
    }
}

OUTPUT服务器：

Server Started on 10.0.0.2:8080
================================
**    Waiting For Client     **
Client Connected 10.0.0.2
================================
**    Waiting For Client     **
Client Connected 10.0.0.2
================================
**    Waiting For Client     **
Waiting to recieve Data from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Received Byte count : 386, from IP : 10.0.0.2
GET /HelloWorld HTTP/1.1
Host: 10.0.0.2:8080
Connection: keep-alive
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
User-Agent: Mozilla/5.0 (Windows NT 6.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.69 Safari/537.36
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-GB,en-US;q=0.8,en;q=0.6


Waiting to recieve Data from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Waiting to recieve Data from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2
Received Byte count : 0, from IP : 10.0.0.2