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app.js
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app.js
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var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var routes = require('./routes/index');
var tweets = require('./routes/tweets');
var userkeys = require('./routes/userkeys');
var auth = require('./auth');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hjs');
// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(require('less-middleware')(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', routes);
app.use('/tweets', tweets);
app.use('/userkeys', userkeys);
var util = require('util'),
twitter = require('twitter');
app.set('authenticated', false);
var keysFileName = "keys.json" //The name of the Twitter API keys JSON file
//When the app is loaded we look for the Twitter API keys file to autmatically authenticate a user
fs = require('fs')
fs.readFile(keysFileName, 'utf8', function (err, data) {
if (err && (err.errno == 34)) { //34 is file not found error
app.set('authenticated', false); //File not found error, still unauthenticated
return console.log("Keys file '" + keysFileName + "' not found. Manual authentication required.");
} else if (err && (err.errno != 34)) { //Another file error has occured
app.set('authenticated', false); //Still unable to authenticate
return console.log(err);
} else {
try {
JSON.parse(data); //Attempt to Parse as JSON
app.set('twitterkeys', JSON.parse(data));
console.log("Keys file '" + keysFileName + "' found and loaded. Attempting Twitter authentication...");
var twitterkeys = app.get('twitterkeys');
auth.twitterAuthenticator(twitterkeys, function(result, twitterName){
app.set('twitterUser', twitterName); //Authentication performed and variabled set
app.set('authenticated', result);
});
} catch (error) {
console.error(error);
app.set('authenticated', false);
return console.error("Keys file '" + keysFileName + "' found but is not in JSON form");
}
}
});
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
var bodyParser = require('body-parser')
app.use( bodyParser.json() ); // to support JSON-encoded bodies
app.use(bodyParser.urlencoded({ // to support URL-encoded bodies
extended: true
}));
module.exports = app;