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express.js
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express.js
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const config = require("config");
const express = require("express");
const logger = require("./common/logger");
const ApiError = require("./common/ApiError");
const errors = require("./common/ErrorCodes");
const path = require('path');
const bodyParser = require('body-parser');
const app = express();
const morgan = require('morgan');
const _ = require('lodash');
const expressValidator = require('express-validator');
var fs = require('fs');
const helmet = require('helmet');
// const _logger = require('./helper/logger');
// var jwt = require('jsonwebtoken');
// var passport = require('passport');
// app.use(passport.initialize());
// require('./config/passport')(passport);
var cors = require('cors');
app.use(morgan('common', {
stream: fs.createWriteStream(path.join(__dirname, 'access.log'), { flags: 'a' }),
skip: () => {
return false;
}
}));
app.use(bodyParser.json({
limit: '50mb'
}));
app.use(bodyParser.urlencoded({
limit: '50mb',
extended: true
}));
// for security
app.use(helmet.referrerPolicy({ policy: 'no-referrer' }));
app.use(helmet.featurePolicy({
features: {
vibrate: ["'none'"],
geolocation: ["'none'"]
}
}));
app.use(helmet.contentSecurityPolicy({
directives:{
defaultSrc: ["'self'"],
scriptSrc: ["'self'"],
styleSrc: ["'self'"],
fontSrc: ["'self'"],
imgSrc: ["'self'", 'data:'],
mediaSrc: ["'self'"],
frameSrc: ["'self'"],
objectSrc: ["'none'"],
connectSrc: ["'self'"],
}
}));
app.use(helmet());
// security end
app.use(expressValidator());
app.use(cors());
app.use('/api/v1', require('./app/routes')(app));
app.get('*', function (req, res, next) {
res.status(404).json({message: "Page not found."});
});
app.use((req, res, next) => {
return next(new ApiError('Not Found', 404, errors.invalidUrl));
});
process.on('unhandledRejection', error => {
// Won't execute
console.log('unhandledRejection', error);
// res.status(500).send('Unknown Error');
});
app.use((err, req, res, next) => {
if (err.status) {
let body = {
message: err.message || "Unknown Error",
};
if (err.errorCode) {
body.errorCode = err.errorCode;
}
body.error = true;
// err.context = { mac: req.query.user };
logger.error(err.message, req, {...err, ...{mac: req.query.user}});
res.status(err.status).json(body);
} else {
if ( err.name == 'TokenExpiredError' ) {
res.status(401).json({
message: 'Token Expired',
errorCode : 401
});
}
else {
if ( !process.env.NODE_ENV ) {
res.status(500).json({
message: err,
errorCode : err.unknown
});
} else {
res.status(500).json({
message: 'There is some error, please try again later.',
errorCode : err.unknown
});
}
}
logger.error(req, err);
}
});
module.exports = {
start: (port) => {
const data = _.pick(config, ['isSetupServer', 'port', 'db']);
data.env = process.env.NODE_ENV || '';
console.log(`http server started at http://127.0.0.1:${port}.`);
logger[data.env ? 'warn': 'error'](`http server started at http://127.0.0.1:${port}.`, data);
app.listen(port, function() {
});
return app;
},
};