从套接字读取数据,发送响应并关闭

时间:2012-05-29 20:55:05

标签: c# php sockets

我正在开发一个c#和php项目,其中PHP脚本打开一个c#程序的套接字,c#程序将读取数据,然后发回一个响应。

在PHP脚本中,我有以下内容:

echo "Opening Client";

$fp = fsockopen("127.0.0.1", 12345, $errno, $errstr, 30);

if (!$fp)
{
    echo "Error: $errstr ($errno)<br />";
}
else
{
    $out = "GET / HTTP/1.1\r\n";
    $out .= "Host: 127.0.0.1\r\n";
    $out .= "Connection: Close\r\n\r\n";
    fwrite($fp, $out);
    while (!feof($fp))
    {
        echo fgets($fp, 128);
    }
    fclose($fp);
}

在C#项目中,我有以下内容:

public void startListen()
        {
            int port = 12345;
            IPAddress serverAddress = IPAddress.Parse("127.0.0.1");
            TcpListener listener = new TcpListener(serverAddress, 12345);
            listener.Start();

            TcpClient client = listener.AcceptTcpClient();

            NetworkStream stream = client.GetStream();
            byte[] data = new byte[client.ReceiveBufferSize];
            int bytesRead = stream.Read(data, 0, Convert.ToInt32(client.ReceiveBufferSize));
            string request = Encoding.ASCII.GetString(data, 0, bytesRead);
            Console.WriteLine(request);

            Console.ReadLine();

PHP脚本似乎仍在等待并且没有完成,我猜它是因为c#app上的套接字发送回应但我不知道如何做到这一点。另一个问题,在C#中我需要Console.ReadLine(),否则c#程序将退出,但PHP脚本会按预期完成。

基本上,我想知道的是这是读取套接字上发送的数据的最佳方法,保持程序运行的最佳方法是什么,以便继续监听套接字以及如何发送回来回复以便php脚本可以完成。

感谢您提供的任何帮助。

3 个答案:

答案 0 :(得分:4)

我设法解决了这个问题,在处理完数据后我需要发送一个stream.write,这是发送回复的内容。

以下是代码

            int port = 12345;
            IPAddress serverAddress = IPAddress.Parse("127.0.0.1");
            TcpListener listener = new TcpListener(serverAddress, port);
            listener.Start();

            while (true)
            {
                TcpClient client = listener.AcceptTcpClient();

                NetworkStream stream = client.GetStream();
                byte[] data = new byte[client.ReceiveBufferSize];
                int bytesRead = stream.Read(data, 0, Convert.ToInt32(client.ReceiveBufferSize));
                string request = Encoding.ASCII.GetString(data, 0, bytesRead);
                Console.WriteLine(request);
                byte[] msg = System.Text.Encoding.ASCII.GetBytes("200 OK");

                // Send back a response.
                stream.Write(msg, 0, msg.Length);
                client.Close();
            }

感谢您的帮助

答案 1 :(得分:2)

先生。 Boardy的解决方案是正确的,但我认为通过套接字做这件事更好。

所以套接字解决方案是:

private void Form3_Load(object sender, EventArgs e)
{
    sc_listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    IPEndPoint ip_local = new IPEndPoint(IPAddress.Loopback, 1225);
    sc_listener.Bind(ip_local);
    sc_listener.Listen(10);

    AsyncCallback callback = new AsyncCallback(procces_incoming_socket);
    sc_listener.BeginAccept(callback, sc_listener);
}

void procces_incoming_socket(IAsyncResult socket_object)
{
    Socket sc_listener = ((Socket)socket_object.AsyncState).EndAccept(socket_object);

    AsyncCallback receive = new AsyncCallback(receive_data);
    buffer = new byte[100];
    sc_listener.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, receive, sc_listener);
}

void receive_data(IAsyncResult socket)
{
    // the system need to wait so i make a loop when it gets data 
    //i end the loop by flag=false
    bool flag = true;
    Socket re_socket = ((Socket)socket.AsyncState);
    while(flag)
    {
        int bytes_recieved = re_socket.EndReceive(socket);

        string data = UTF8Encoding.UTF8.GetString(buffer);
        if (textBox1.InvokeRequired)
        {
            // for cross thread problem
            textBox1.Invoke(new MethodInvoker(delegate { textBox1.Text = data; }));
        }
        else
        {
            textBox1.Text = data;
        }
        flag = false;
    }
    string back_data = "my pm socket back";
    byte[] buffers = new byte[50];
    buffers = UTF8Encoding.UTF8.GetBytes(back_data);
    re_socket.Send(buffers);
    // if the socket is not closed php will load for maximum required time and then error
    re_socket.Close();
    //start for next listening (O-0)
    AsyncCallback callback = new AsyncCallback(procces_incoming_socket);
    sc_listener.BeginAccept(callback, sc_listener);
}

答案 2 :(得分:0)

我不是任何想象力的PHP家伙所以我的答案取决于php能够正确回应。在C#端,创建一个while / do-while循环,继续运行以接受下一个传入请求。这是一个简单的例子:

http://www.csharp-examples.net/socket-send-receive/

确保设置NoDelay选项以便刷新信息。