tcpclient

What should I do to completely close the tcpClient connection with mcu?

由 情到浓时终转凉″ 提交于 2020-06-25 18:14:44
问题 I'm now working on a tcp socket connection to tcp server running in ESP32. It works fine for the communication, but I failed to close the connection. After searching for the solution on close/reset tcpClient, it seems that the proper way to close a tcpClient should be: tcpClient.GetStream().Close(); tcpCLient.Close(); The example in msdn also use this method. But unforunately, it cannot really close the connection. As checked in the mcu, the connection has not been closed. And it will not be

How to connect Flutter app to tcp socket server?

由 一笑奈何 提交于 2020-06-25 06:50:06
问题 I had great difficulties to connect Flutter app to my network tcp socket on server. I know I have to use some sort intermediate option so translate data between tcp socket to flutter and Flutter to tcp socket. Any idea, info how do achieve this. And question is How to connect Flutter app to tcp socket server? 回答1: Here's pretty much the simplest Dart program to connect to a TCP socket on a server. It sends 'hello', waits 5 seconds for any reply, then closes the socket. You could use this with

visual studio exits debugging without any exception or error

由 こ雲淡風輕ζ 提交于 2020-06-14 03:21:39
问题 I have a TCP/CLIENT game server project in Visual Studio 2010 . When I start the project in debug mode, some time later (sometimes 1 day, sometimes 1 week) Visual Studio quits debugging without any exceptions or errors. I checked the windows and application log and there is nothing unexpected there. How can I find out what the real problem is or what (e.g. some exceptions like stackoverflow) can cause the Visual Studio exit debugging? 回答1: I assume that your application is multithreaded. In

C# Tcp BeginAcceptTcpClient throws ObjectDisposedException

由 ﹥＞﹥吖頭↗ 提交于 2020-06-01 07:38:26
问题 I'm trying to upgrade from UDP to TCP, but I am completely lost. :( This is my Server code (not too long). private readonly TcpListener _tcpListener; public TCP(IPEndPoint endPoint) { try { _tcpListener = new TcpListener(endPoint); _tcpListener.Start(); AcceptTcpClient(); AcceptSocket(); TestClient test = new TestClient(); test.Connect(); } catch (SocketException e) { Console.WriteLine("SocketException: " + e); } finally { _tcpListener.Stop(); } } private void AcceptSocket() { _tcpListener

Why has the server stopped responding after a change in source code?

由 南笙酒味 提交于 2020-04-18 12:36:03
问题 I need to implement HTTP protocol through TCP. I already had a TCP/IP client-server program which had been working absolutely fine. Now, I have done some minor change in the source code so that it behaves as an HTTP client-server. But, unfortunately it stopped working. The following code ... public void Write(string str) { if (IsConnected) { byte[] strBytes = Encoding.UTF8.GetBytes(str); byte[] lenBytes = BitConverter.GetBytes(strBytes.Length); Array.Reverse(lenBytes); writer.Write(lenBytes);

Why has the server stopped responding after a change in source code?

由 余生长醉 提交于 2020-04-18 12:35:59
问题 I need to implement HTTP protocol through TCP. I already had a TCP/IP client-server program which had been working absolutely fine. Now, I have done some minor change in the source code so that it behaves as an HTTP client-server. But, unfortunately it stopped working. The following code ... public void Write(string str) { if (IsConnected) { byte[] strBytes = Encoding.UTF8.GetBytes(str); byte[] lenBytes = BitConverter.GetBytes(strBytes.Length); Array.Reverse(lenBytes); writer.Write(lenBytes);

Why has the server stopped responding after a change in source code?

由 寵の児 提交于 2020-04-18 12:35:12
问题 I need to implement HTTP protocol through TCP. I already had a TCP/IP client-server program which had been working absolutely fine. Now, I have done some minor change in the source code so that it behaves as an HTTP client-server. But, unfortunately it stopped working. The following code ... public void Write(string str) { if (IsConnected) { byte[] strBytes = Encoding.UTF8.GetBytes(str); byte[] lenBytes = BitConverter.GetBytes(strBytes.Length); Array.Reverse(lenBytes); writer.Write(lenBytes);

How to plot a realtime 3D graph from TCP socket received data in integer using python?

由 纵然是瞬间 提交于 2020-03-28 06:56:13
问题 I am working on a python program to receive data from TCP socket. I am successfully able to receive the data in int format. Now I want to plot a active 3D graph from received values . How to plot a 3D graph from the received values. I want to Plot an active 3D graph from the received output from the socket. Previously i was getting the output as Hex value. Now successfully able to convert those Hex value in integer format which I am getting now. Those integer value is plotted in polar format.

C# TcpClient 连接状态检测

由 假如想象 提交于 2020-03-16 19:53:22
C# TcpClient在连接成功后无法检测连接状态，即使对方关闭了网络连接。以下扩展可检测连接状态： public static class TcpClientEx { public static bool IsOnline(this TcpClient c) { return !((c.Client.Poll(1000, SelectMode.SelectRead) && (c.Client.Available == 0)) || !c.Client.Connected); } } NetworkStream的 Read 方法在关闭连接时会抛异常(IOException)。但是它会将 线程阻塞 。如果不想陷入阻塞状态，就只能通过上面的方法检测了！在读取网络流之前最好检测一下 NetworkStream.DataAvailable 有数据再读。 var conn=state as TcpClient; while(conn.IsOnline()){//当网络连接未中断时循环 using (var s = conn.GetStream()){ var buff=new byte[512]; if(s.DataAvailable){ //判断有数据再读，否则Read会阻塞线程。后面的业务逻辑无法处理 var len = s.Read(buff,0,buff.Length); } /

Reading from TcpStream results in empty buffer

由 不羁岁月 提交于 2020-03-01 19:43:43
问题 I want to read data from a TCP stream but it results in an empty Vec : extern crate net2; use net2::TcpBuilder; use std::io::Read; use std::io::Write; use std::io::BufReader; let tcp = TcpBuilder::new_v4().unwrap(); let mut stream = tcp.connect("127.0.0.1:3306").unwrap(); let mut buf = Vec::with_capacity(1024); stream.read(&mut buf); println!("{:?}", buf); // prints [] When I use stream.read_to_end the buffer is filled but this takes way too long. In Python I can do something like import
订阅 tcpclient