luciopaiva

Full socket.io client and server example

Last updated: 2021-02-21, tested with socket.io v3.1.1

This is the simplest implementation you will find for a client/server WebSockets architecture using socket.io.

To see a full explanation, read my answer on SO here: https://stackoverflow.com/a/24232050/778272.

If you're looking for examples using frameworks, check these links:

eplawless

var net = require('net');

function startServer(port, host, callback) {
    var server = net.createServer();
    server.listen(port, host, function() {
        callback(undefined, server);
    });
    server.on('error', function(error) {
        console.error('Ah damn!', error);
        callback(error);

tedmiston

/*
In the node.js intro tutorial (http://nodejs.org/), they show a basic tcp 
server, but for some reason omit a client connecting to it.  I added an 
example at the bottom.

Save the following server in example.js:
*/

var net = require('net');

adulau

How to acquire memory from a running Linux system

Dumping memory on Linux system can be cumbersome especially that the behavior might be different among different GNU/Linux distribution or Linux kernel version. In the early days, the easiest was to dump the memory from the memory device (/dev/mem) but over time the access was more and more restricted in order to avoid malicious process to directly access the kernel memory directly. The kernel option CONFIG_STRICT_DEVMEM was introduced in kernel version 2.6 and upper (2.6.36–2.6.39, 3.0–3.8, 3.8+HEAD). So you'll need to use a Linux kernel module in order to acquire memory.

fmem