webhook_git_pull.js

const secret = "dooboolab0!";
const repo = "./whichwitch-server";

const http = require('http');
const crypto = require('crypto');
const exec = require('child_process').exec;

http.createServer(function (req, res) {
    req.on('data', function(chunk) {
        let sig = "sha1=" + crypto.createHmac('sha1', secret).update(chunk.toString()).digest('hex');

	if(sig != req.headers['x-hub-signature']){
	    console.log('invalid key');
	    var data = JSON.stringify({"error": "invalid key", key: sig});
	    return res.end(data);
	}
	console.log('running');
	exec('cd ' + repo + ' && git pull');
    });

    res.end();
}).listen(8081);