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const events = require('events');
const http = require('http');
const send = require('send');
const url = require('url');
const Promise = require('../utils/promise');
class Server extends events.EventEmitter {
constructor() {
super();
this.running = null;
this.dir = null;
this.port = 0;
this.sockets = [];
}
/**
* Return true if the server is running
* @return {Boolean}
*/
isRunning() {
return !!this.running;
}
/**
* Stop the server
* @return {Promise}
*/
stop() {
const that = this;
if (!this.isRunning()) return Promise();
const d = Promise.defer();
this.running.close((err) => {
that.running = null;
that.emit('state', false);
if (err) d.reject(err);
else d.resolve();
});
for (let i = 0; i < this.sockets.length; i++) {
this.sockets[i].destroy();
}
return d.promise;
}
/**
* Start the server
* @return {Promise}
*/
start(dir, port) {
const that = this;
let pre = Promise();
port = port || 8004;
if (that.isRunning()) pre = this.stop();
return pre
.then(() => {
const d = Promise.defer();
that.running = http.createServer((req, res) => {
// Render error
function error(err) {
res.statusCode = err.status || 500;
res.end(err.message);
}
// Redirect to directory's index.html
function redirect() {
const resultURL = urlTransform(req.url, (parsed) => {
parsed.pathname += '/';
return parsed;
});
res.statusCode = 301;
res.setHeader('Location', resultURL);
res.end('Redirecting to ' + resultURL);
}
res.setHeader('X-Current-Location', req.url);
// Send file
send(req, url.parse(req.url).pathname, {
root: dir
})
.on('error', error)
.on('directory', redirect)
.pipe(res);
});
that.running.on('connection', (socket) => {
that.sockets.push(socket);
socket.setTimeout(4000);
socket.on('close', () => {
that.sockets.splice(that.sockets.indexOf(socket), 1);
});
});
that.running.listen(port, (err) => {
if (err) return d.reject(err);
that.port = port;
that.dir = dir;
that.emit('state', true);
d.resolve();
});
return d.promise;
});
}
}
/**
* urlTransform is a helper function that allows a function to transform
* a url string in it's parsed form and returns the new url as a string
*
* @param {String} uri
* @param {Function} fn
* @return {String}
*/
function urlTransform(uri, fn) {
return url.format(fn(url.parse(uri)));
}
module.exports = Server;
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