Frontend and backend communication example
Server:
// https://developer.mozilla.org/en-US/docs/Learn/Server-side/Node_server_without_framework
var http = require('http');
var fs = require('fs');
var path = require('path');
http.createServer(function (request, response) {
var filePath = '.' + request.url;
if (filePath == './') {
filePath = './index.html';
}
var extname = String(path.extname(filePath)).toLowerCase();
var mimeTypes = {
'.html': 'text/html',
'.js': 'text/javascript',
'.css': 'text/css',
'.json': 'application/json',
'.png': 'image/png',
'.jpg': 'image/jpg',
'.gif': 'image/gif',
'.svg': 'image/svg+xml',
'.wav': 'audio/wav',
'.mp4': 'video/mp4',
'.woff': 'application/font-woff',
'.ttf': 'application/font-ttf',
'.eot': 'application/vnd.ms-fontobject',
'.otf': 'application/font-otf',
'.wasm': 'application/wasm'
};
var contentType = mimeTypes[extname] || 'application/octet-stream';
fs.readFile(filePath, function(error, content) {
if (error) {
if(error.code == 'ENOENT') {
fs.readFile('./404.html', function(error, content) {
response.writeHead(404, { 'Content-Type': 'text/html' });
response.end(content, 'utf-8');
});
}
else {
response.writeHead(500);
response.end('Sorry, check with the site admin for error: '+error.code+' ..\n');
}
}
else {
response.writeHead(200, { 'Content-Type': contentType });
response.end(content, 'utf-8');
}
});
}).listen(80);Post data on frontend:
let xml = new XMLHttpRequest();
function POSTdata(msg) {
xml.open('POST', 'x', true);
xml.send(msg);}Receive data on server:
request.on('data', (chunk) => {
if (request.url == "/x") {
console.log(chunk.toString());
}
});