C'è un metodo più semplice.
Invece di usare setTimeout o lavorare direttamente con socket,
possiamo usare 'timeout' nelle 'opzioni' negli usi client
Di seguito è riportato il codice del server e del client, in 3 parti.
Parte modulo e opzioni:
'use strict';
// Source: https://github.com/nodejs/node/blob/master/test/parallel/test-http-client-timeout-option.js
const assert = require('assert');
const http = require('http');
const options = {
host: '127.0.0.1', // server uses this
port: 3000, // server uses this
method: 'GET', // client uses this
path: '/', // client uses this
timeout: 2000 // client uses this, timesout in 2 seconds if server does not respond in time
};
Parte server:
function startServer() {
console.log('startServer');
const server = http.createServer();
server
.listen(options.port, options.host, function () {
console.log('Server listening on http://' + options.host + ':' + options.port);
console.log('');
// server is listening now
// so, let's start the client
startClient();
});
}
Parte cliente:
function startClient() {
console.log('startClient');
const req = http.request(options);
req.on('close', function () {
console.log("got closed!");
});
req.on('timeout', function () {
console.log("timeout! " + (options.timeout / 1000) + " seconds expired");
// Source: https://github.com/nodejs/node/blob/master/test/parallel/test-http-client-timeout-option.js#L27
req.destroy();
});
req.on('error', function (e) {
// Source: https://github.com/nodejs/node/blob/master/lib/_http_outgoing.js#L248
if (req.connection.destroyed) {
console.log("got error, req.destroy() was called!");
return;
}
console.log("got error! ", e);
});
// Finish sending the request
req.end();
}
startServer();
Se metti tutte le 3 parti precedenti in un file, "a.js", e poi esegui:
node a.js
quindi, l'output sarà:
startServer
Server listening on http://127.0.0.1:3000
startClient
timeout! 2 seconds expired
got closed!
got error, req.destroy() was called!
Spero che aiuti.