asyncsocket | 易学教程

How does an asynchronous socket server work?

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问题 I should state that I'm not asking about specific implementation details (yet), but just a general overview of what's going on. I understand the basic concept behind a socket, and need clarification on the process as a whole. My (probably very wrong) understanding is currently this: A socket is constantly listening for clients that want to connect (in its own thread). When a connection occurs, an event is raised that spawns another thread to perform the connection process. During the

ZMQ DEALER - ROUTER Communication

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问题 I am currently working on a project that requires some communication over the network of a different data types from some entities of a distributed system and I am using ZMQ. The main goal of the project is to have a central node which services clients which can connect at any time. For each client connected, the central node should manage the message communication between the two. Currently, and by the moment, all communication is happening over TCP. The clients need to send and receive

iphone开源网络编程cocoaasyncsocket

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> iphone的CFNetwork编程比较艰深。我选择使用AsyncSocket开源库来开发，下面介绍一些简单的使用,并给出我写的一个简单的实现模板，只要添加自己的处理代码就可以使用了。官方网站:http://code.google.com/p/cocoaasyncsocket/ 一.项目添加ASyncSocket 1.下载ASyncSocket库源码 2.把ASyncSocket库源码加入项目 3.在项目增加CFNetwork框架二.功能介绍 1.在需要联接地方使用connectToHost联接服务器其中initWithDelegate的参数中self是必须。这个对象指针中的各个Socket响应的函数将被ASyncSocket所调用. asyncSocket = [[AsyncSocket alloc] initWithDelegate:self]; NSError *err = nil; if(![asyncSocket connectToHost:host on:port error:&err]) { NSLog(@"Error: %@", err); } 2.增加Socket响应事件因为initWithDelegate把将当前对象传递进去，这样只要在当前对象方法实现相应方法. 关于NSData对象

Nagle-Like Problem

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问题 so I have this real-time game, with a C++ sever with disabled nagle using SFML library , and client using asyncsocket, also disables nagle. I'm sending 30 packets every 1 second. There is no problem sending from the client to the server, but when sending from the server to the clients, some of the packets are migrating. For example, if I'm sending "a" and "b" in completly different packets, the client reads it as "ab". It's happens just once a time, but it makes a real problem in the game. So

Fast Repeat TakeWhile causes infinite loop

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问题 How can I make the following observable repeat until stream.DataAvailable is false? Currently it looks like it never stops. AsyncReadChunk and Observable.Return inside the Defer section make OnNext call then OnCompleted call. When Repeat receives the OnNext call it passes it to TakeWhile. When TakeWhile's is not satisfied it completes the observable but I think the OnCompleted that comes right after the OnNext is so fast that it makes Repeat to re-subscribes to the observable and causes the

Use Java to connect ethernet device

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问题 I had a board connect to the PC using LAN cable(RJ45). I need to write the Java code to connect the board and get some data from it. How can I do it? Actually I got a code from C++, it used CAsyncSocket class to do it. The C++ code is like this: CAsyncSocket.Create(); CAsyncSocket.connect(IP, PORT); Now, I would like to convert it into Java. Actually, I'm not so familiar with Java. Can someone show the code to me? Example: My board IP is 192.168.2.10 and PORT is 2000. How can I connect it

Android Asynctask method does not display the data

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问题 I tried to display data(string) from android device to java desktop server application. I was successful in that. I tried to find wifi signal strength from wifi access point to android device. I did that too. Now, I need to integrate this both thing. First, is the client code where I find the signal strength and pass it to server. First, I run the server. It runs and waits. As soon as I run the client the signal strength from 1st router is displayed and then the app crashes. I have given the

C++ UDP RecvFrom, SendTo Different Sockets

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问题 i wrote a multithreaded UDP server after the following scheme: Scheme: 1 Receiver Thread (Multiple Worker Threads, each has an own Socket, not bindend ,just created Ipv4, UDP,Datagram) Message gets pushed to 1 worker which then proceed's it and then sends an answere with its own socket. Problem: This works perfectly on all my own test programs but for some odd reason it doesnt work with an old software for what i am emulating the server. The software uses async Wsa (overlapped), but i still

How to connect multiple IP addresses with same port number using TCP/IP client?

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问题 I want to read data from multiple tcp/ip devices. I want to create an application in vb.net or c# which will communicate with multiple devices at a time. How to connect multiple devices at a time? IP addresses as xxx.xx.xx.100, xxx.xx.xx.101, xxx.xx.xx.102, xxx.xx.xx.103, xxx.xx.xx.104, xxx.xx.xx.105, etc and same port number 8000. I am sending request to connected device & the device gives the response. I am able to read data from a device. Timer used for checking connection status & polling

How send a command from Server (using a List of connections) to Client after connection established?

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问题 I have these two classes that is part of my Server application (desktop) and need send a command back to Client after connection was established. When i try make this way: clients[i].Send("info"); the Send() routine (of Listener.cs ) is accessible, but i have this following sintaxe error: How solve this? Listener.cs using System; using System.Collections.Generic; using System.Text; using System.Net; using System.Net.Sockets; class Listener { Socket s; string IP; public List<Info> clients;