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var events = require('events');
var http = require('http');
var send = require('send');
var util = require('util');
var url = require('url');
var Promise = require('../utils/promise');
function Server() {
this.running = null;
this.dir = null;
this.port = 0;
this.sockets = [];
}
util.inherits(Server, events.EventEmitter);
/**
Return true if the server is running
@return {Boolean}
*/
Server.prototype.isRunning = function() {
return !!this.running;
};
/**
Stop the server
@return {Promise}
*/
Server.prototype.stop = function() {
var that = this;
if (!this.isRunning()) return Promise();
var d = Promise.defer();
this.running.close(function(err) {
that.running = null;
that.emit('state', false);
if (err) d.reject(err);
else d.resolve();
});
for (var i = 0; i < this.sockets.length; i++) {
this.sockets[i].destroy();
}
return d.promise;
};
/**
Start the server
@return {Promise}
*/
Server.prototype.start = function(dir, port) {
var that = this, pre = Promise();
port = port || 8004;
if (that.isRunning()) pre = this.stop();
return pre
.then(function() {
var d = Promise.defer();
that.running = http.createServer(function(req, res){
// Render error
function error(err) {
res.statusCode = err.status || 500;
res.end(err.message);
}
// Redirect to directory's index.html
function redirect() {
var resultURL = urlTransform(req.url, function(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', function (socket) {
that.sockets.push(socket);
socket.setTimeout(4000);
socket.on('close', function () {
that.sockets.splice(that.sockets.indexOf(socket), 1);
});
});
that.running.listen(port, function(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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