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server.js
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server.js
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// import packages
var express = require('express');
var fs = require('fs');
var path = require('path');
var http = require('http');
// initialize app
var app = express();
// set static folder
app.use(express.static(__dirname + '/static'));
// configure to serve raw html files
app.set('view engine', 'html');
app.engine('html', function (path, options, callback) {
fs.readFile(path, 'utf-8', callback);
});
// main route serves index.html
app.get('/', function (req, res) {
res.sendFile(path.join(__dirname, '/static/index.html'));
});
// helper route fetches source HTML given URL as parameter
app.get('/source', function (req, res) {
var url = req.query.url;
var source = '';
var request = http.get(url, function (response) {
// aggregate chunks onto source
response.on('data', function (chunk) {
source += chunk;
});
// send source when complete
response.on('end', function () {
res.status(200);
res.send(source);
});
})
// send error message if request to given url fails
request.on('error', function(e) {
res.status(404);
res.send('Error: page could not be fetched.');
});
});
// catch any other routes as errors
app.use(function (err, req, res, next) { res.status(err.status || 500); });
// start listening for requests
app.listen(process.env.PORT || 5000);