c# - 为什么 Ruby 套接字服务器与其他 Ruby 套接字客户端一起工作，而不是 C# 套接字客户端？

Question

所以我有两个 Ruby 程序，它们是客户端和服务器套接字程序，它们一起工作以交换消息。但是 C# 客户端不起作用。我给 MCVE，首先是 ruby​​ 客户端。

#socketClient.rb
#With thanks to https://code.likeagirl.io/socket-programming-in-ruby-f714131336fd
require "socket"

while sum = $stdin.gets.chomp # Read lines from the socket
  socket = TCPSocket.open("localhost", 3000)

  #puts "Starting the Client..................."

  socket.puts sum
  while message = socket.gets # Read lines from the socket
    puts message.chomp
  end
  socket.close                    # Close the socket
end

#puts "Closing the Client..................."

和服务器

#simplestSocketServer.rb
#With thanks to https://code.likeagirl.io/socket-programming-in-ruby-f714131336fd

require "socket"

port = 3000
ipAddress = "127.0.0.1"
server = TCPServer.open(ipAddress, port) # Server would listen on port 3000
loop { # Servers run forever
puts "Starting the Server, accepting connections on port " + port.to_s + "..................."
client_connection = server.accept # Establish client connect connection
begin
    clientText = client_connection.gets.chomp
    puts clientText

    resp = "Acknowledged"
    client_connection.puts("#{clientText}" +  "#{resp}") # Send the answer to the client
    client_connection.puts("Closing the connection with #{client_connection}")
rescue Exception => getException
    puts "#{getException}"
end
client_connection.close      # Disconnect from the client
}

和C#控制台程序

using System;
using System.Net.Sockets;
using System.Text;


namespace SimplestCSharpRubySocketsClient
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                string ipAddress = "127.0.0.1";
                Int16 portNumber = 3000;

                TcpClient _client; _client = new TcpClient();
                _client.Connect(ipAddress, portNumber);

                System.Console.WriteLine("we have connected, seemingly ...");

                NetworkStream stream;

                stream = _client.GetStream();

                Byte[] sendBytes = Encoding.UTF8.GetBytes("some text");

                System.Console.WriteLine("writing and flushing some bytes ...");
                stream.Write(sendBytes, 0, sendBytes.Length);
                stream.Flush();

                Byte[] recvBytes = new byte[_client.ReceiveBufferSize];
                System.Console.WriteLine("_client.ReceiveBufferSize = " + _client.ReceiveBufferSize);  // <--- this prints 65536

                System.Console.WriteLine("waiting to read bytes ...");
                stream.Read(recvBytes, 0, recvBytes.Length); //<--- hangs here

                System.Console.WriteLine("comething came back ...");
                string result = Encoding.UTF8.GetString(recvBytes);
                string result2 = result.Substring(0, result.LastIndexOf("\r\n"));

                _client.Close();
                _client.Dispose();
                _client = null;
            }
            catch (Exception ex)
            {
                //TODO figure out a better error handler
                throw ex;
            }
        }
    }
}

C# 程序连接并写入字节，但在查找读取字节时它只是挂起。

请注意，我正在 Visual Studio 中以管理员权限运行 C# 控制台程序。这两个 ruby​​ 程序在各自独立的 Windows 控制台窗口中运行。

考虑到一些反馈，我在 ruby​​ 服务器中添加了另一行来输出 clientText。它什么也不打印，表明服务器没有完全接收到字节。是否有要求C#发送的终止信号？

提前致谢。

Answer 1

这里的问题是 C# 客户端不会像 Ruby 版本那样在字符串末尾发送换行符(socket.puts 发送一个在末尾带有换行符的字符串)。

如果您更改 sendBytes 数组以在有效负载中包含 \n，如下所示:

Byte[] sendBytes = Encoding.UTF8.GetBytes("some text\n");

您会看到它在控制台上打印comething came back ...。

由于在 Ruby 服务器中有以下 gets，因此需要换行符:

clientText = client_connection.gets.chomp