PHP客户端套接字与C＃套接字服务器的连接

Question

我正在尝试使用PHP从我的网站连接到C＃服务器。

我想在所有页面上保持活动连接。

C＃服务器：端口100

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace Multi_Server
{
    class Program
    {
        private static Socket _serverSocket;
        private static readonly List<Socket> _clientSockets = new List<Socket>();
        private const int _BUFFER_SIZE = 2048;
        private const int _PORT = 100;
        private static readonly byte[] _buffer = new byte[_BUFFER_SIZE];

        static void Main()
        {
            Console.Title = "Server";
            SetupServer();
            Console.ReadLine(); // When we press enter close everything
            CloseAllSockets();
        }

        private static void SetupServer()
        {
            Console.WriteLine("Setting up server...");
            _serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            _serverSocket.Bind(new IPEndPoint(IPAddress.Any, _PORT));
            _serverSocket.Listen(5);
            _serverSocket.BeginAccept(AcceptCallback, null);
            Console.WriteLine("Server setup complete");
        }

        /// <summary>
        /// Close all connected client (we do not need to shutdown the server socket as its connections
        /// are already closed with the clients)
        /// </summary>
        private static void CloseAllSockets()
        {
            foreach (Socket socket in _clientSockets)
            {
                socket.Shutdown(SocketShutdown.Both);
                socket.Close();
            }

            _serverSocket.Close();
        }

        private static void AcceptCallback(IAsyncResult AR)
        {
            Socket socket;

            try
            {
                socket = _serverSocket.EndAccept(AR);
            }
            catch (ObjectDisposedException) // I cannot seem to avoid this (on exit when properly closing sockets)
            {
                return;
            }

           _clientSockets.Add(socket);
           socket.BeginReceive(_buffer, 0, _BUFFER_SIZE, SocketFlags.None, ReceiveCallback, socket);
           Console.WriteLine("Client connected, waiting for request...");
           _serverSocket.BeginAccept(AcceptCallback, null);
        }

        private static void ReceiveCallback(IAsyncResult AR)
        {
            Socket current = (Socket)AR.AsyncState;
            int received;

            try
            {
                received = current.EndReceive(AR);
            }
            catch (SocketException)
            {
                Console.WriteLine("Client forcefully disconnected");
                current.Close(); // Dont shutdown because the socket may be disposed and its disconnected anyway
                _clientSockets.Remove(current);
                return;
            }

            byte[] recBuf = new byte[received];
            Array.Copy(_buffer, recBuf, received);
            string text = Encoding.ASCII.GetString(recBuf);
            Console.WriteLine("Received Text: " + text);

            if (text.ToLower() == "get time") // Client requested time
            {
                Console.WriteLine("Text is a get time request");
                byte[] data = Encoding.ASCII.GetBytes(DateTime.Now.ToLongTimeString());
                current.Send(data);
                Console.WriteLine("Time sent to client");
            }
            else if (text.ToLower() == "exit") // Client wants to exit gracefully
            {
                // Always Shutdown before closing
                current.Shutdown(SocketShutdown.Both);
                current.Close();
                _clientSockets.Remove(current);
                Console.WriteLine("Client disconnected");
                return;
            }
            else
            {
                Console.WriteLine("Text is an invalid request");
                byte[] data = Encoding.ASCII.GetBytes("Invalid request");
                current.Send(data);
                Console.WriteLine("Warning Sent");
            }

            current.BeginReceive(_buffer, 0, _BUFFER_SIZE, SocketFlags.None, ReceiveCallback, current);
        }
    }
}

我正在使用http://php.net/manual/en/book.sockets.php

请不要提出其他建议（对于不兼容的HTML5浏览器，这是一个后备选项）

PHP：

<?PHP
 $service_port = 100;
  $address = '10.10.10.12';

  $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
  socket_set_nonblock($socket);

socket_connect($socket, $address, $service_port);

?>

连接时，我的PHP代码导致服务器上的错误。 https://www.anony.ws/i/2015/06/02/Capture1aa49.png

尝试通过python连接时出现相同的问题。

#!/Python34/python
import socket
HOST = '10.10.10.12'    # The remote host
PORT = 100             # The same port as used by the server
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
s.sendall('Hello, world')
data = s.recv(1024)
s.close()
print('Received', repr(data))

我能够跟踪该错误...仍然不确定是什么原因引起的。.消息：发生TCPIP套接字错误（10053）：建立的连接被主机中的软件中止了。 原因：服务器关闭了客户端连接。 行动：与网络管理员或服务器管理员联系。

在服务器的“开始接收”中发生了错误，这导致服务器关闭连接。 我相信我将信息错误地发送到服务器，如果我取出服务器的接收，连接不会终止。

Answer 1

保持与PHP的连接打开不是一种好习惯，并且会导致页面无法完成加载。 Web浏览器收到输出时，应关闭PHP。 考虑使用Javascript而不是PHP。 连接关闭的原因是握手。