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Building TCP Server Node implements HTTP server in the form of http.Server pseudoclass, which inherits from TCP server pseudoclass in. net Server. TCP server declaration cycle var server = require('net').createServer(); var port = 4001; server.on('listening',function(){ console.log('server is listening on port',port); }); server.on( ...

A simple Echo example of WebSocket: The sample code comes from: http://www.websocket.org/echo.html Using a text editor, copy and save the following code in a websocket.html file, and as soon as you open it in the browser, the page will automatically connect using websocket, send a message, display the received server response, and then clo ...

How to ensure that Service is not Kill For knowledge about Service, please refer to Comprehensive Analysis of Android Service This article is written in great detail. (1) onStartCommand method, returning START_STICKY @Override public int onStartCommand(Intent intent, int flags, int startId) { flags = START_STICKY; return super. ...

pidstat 1 information You can see if the process with pid 12186 is occupying CPU 0 and using CPU 0 at 100%, or if system consumes CPU 0 at 100%. Mpstat-P ALL 1 Information     Use the ps command to view the cpu consumption of threads in the process ps -mp 12186 -o THREAD,tid,time USER %CPU PRI SCNT WCHAN USER SYSTEM TID TIME actiont+ 176 ...

Connection-oriented TCP "Connection-oriented" means that a connection must be established with the other party before formal communication. For example, when you call someone, you have to wait until the line is connected and the other person picks up the microphone to talk to each other. TCP (Transmission Control Protocol) is a c ...

ss is the abbreviation of Socket Statistics. As the name implies, the ss command can be used to obtain socket statistics, which can display content similar to netstat. But the advantage of ss is that it can display more detailed information about TCP and connection status, and it is faster and more efficient than netstat. When the number of s ...

Android blt only supports API 18 Android 4.3 or more, and some functions even require API 19 Android 4.4. So before we do blt projects, we must be clear about the range of versions available. I'm going to talk about the operation of opening the BLT gate. These operations are how to open blt, how to search for other devices, how to p ...

The teaching catalogue of day26: 26.01 Network Programming (Overview of Network Programming) (Understanding) A: Computer Network It refers to a computer system that connects multiple computers with independent functions in different geographical locations and their external devices through communication lines, realizes resource sharing an ...

Related articles Android System Architecture and System Source Directory Preface As the first series in the "Android Framework Layer" series, we first need to understand the Android system startup process, which involves a lot of important knowledge points. In this series, we will explain them one by one. In this article, we will ...

Recently, in researching the concrete implementation of retrofit, retrofit uses okhttp,okhttp uses Okio,so I want to start with the bottom Okio. And I haven't taken a serious look at the IO block of java, so I take this opportunity to learn about io. This article is about Okio. Next, I should write about okhttp and retrofit. There are a lot o ...