Programmer Think

I. TCP based half shutdown 1. Problems caused by unilateral disconnection The close function of Linux and the closesocket function of Windows mean complete disconnection. Complete disconnection means that the input and output streams are disconnected at the same time. If host A no longer needs to transmit data to host B, and ...

linux recently learned about interprocess communication, so decided to create a simple chat program with the help of processes and shared memory and following the producer-consumer model.The following is a brief description of the program ideas.The first is the server-side program, which creates two processes. Process 1 receives messages from c ...

Multi instance implementation of mariadb based on binary installation   1. mariadb version: 10.2.23   2. shell script for binary installation of mariadb #!/bin/bash id mysql &>/dev/null if [ `echo $?` -ne 0 ];then userdel -r mysql &>/dev/null useradd -r -u 336 -s /sbin/nologin -d /data/mysql mysql &amp ...

Code background The following functions need to be realized: click the page button in the foreground, and the background will send instructions to the lower computer to control the Internet of things devices. In fact, this logic can be applied to many scenarios. The process of my solution is as follows: The foreground uses On ...

1. Sticky 1.1 sticking phenomenon Let's start by making a program that executes commands remotely based on tcp (commands ls-l; l l l l l; pwd) When multiple commands are executed at the same time, it is likely that only part of the result will be obtained, and when other commands are executed, another part of the result will be received, which ...

Using IDEA, Myeclipse Write service interface HelloService Server implementation class Write the calling class of the server package whu; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.lang.reflect.Method; import java.net.ServerSocket; import java.net.Socket; public class RpcFramework { //Regi ...

Use Netty to realize a simple communication model. Look at the program: 1. Server side: Class Server: import io.netty.bootstrap.ServerBootstrap; import io.netty.channel.*; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.channel.socket.SocketChannel; import io.netty.channel.socket.nio.NioServerSocketChannel; import ...

The previous program, no matter the server or the client, has a problem, that is, it exits immediately after processing a request, which is not of great practical significance. Can you always accept requests from clients like a Web server? Yes, just use the while loop. Modify the echo program so that the server can continuously ...

First, use java as the server, use browser as the client, let browser link to java Server Every browser will send a "secret code" first when sending a request. If the other party can match the secret code, it is his own person, and then he will send data This code is our http protocol Use java as the client and tomcat ...

Welcome to the original link: https://mp.weixin.qq.com/s/eAJpnEfjflVr76iPVHN6rA  This is a personal note of sorting and thinking after watching the above links   Advantages of docker container More efficient use of system resources Because the container does not need additional overhead such as hardware virtualization and runni ...