Server.js file
var express = require('express');
var path = require('path');
var logger = require('morgan');
var bodyParser = require('body-parser');
var fs = require('fs');
var app = express();
var os = require('os');
//app.use(logger('dev'));
app.use(bodyParser.json());
app.all('/*', function (req, res, next) {
// CORS headers
res.header("Access-Control-Allow-Origin", "*"); // restrict it to the required domain
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
// Set custom headers for CORS
res.header('Access-Control-Allow-Headers', 'Content-type,Accept,X-Access-Token,X-Key');
if (req.method == 'OPTIONS') {
res.status(200).end();
} else {
next();
}
});
// Auth Middleware - This will check if the token is valid
// Only the requests that start with /api/v1/* will be checked for the token.
// Any URL's that do not follow the below pattern should be avoided unless you
// are sure that authentication is not needed
//app.all('/api/v1/*', [require('./middlewares/validateRequest')]);
app.use('/', require('./routes')); // Write url in the routes.js file
app.use(function (err, req, res, next) {
if (!err) {
return next();
}
else {
return next();
}
});
//404 error handler
// If no route is matched by now, it must be a 404
app.use(function (req, res, next) {
var err = new Error('URL Not Found');
err.status = 404;
var date = new Date();
next(err);
});
// Start the server
app.set('port', process.env.PORT || 3000);
var server = app.listen(app.get('port'), function () {
console.log('Express server listening on port ' + server.address().port);
});
I have read to handle internal server error Do like that. I even tried that too but it won't run as I wanted
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
console.log(err.message+' w');
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: {}
});
});
How to avoid that so that the server won't shot down ?
Tried that link too https://expressjs.com/en/guide/error-handling.html , http://code.runnable.com/UTlPPF-f2W1TAAEU/error-handling-with-express-for-node-js
For express middleware error handling
Catch 404 and forward to error handler
app.use(function(req, res) {
res.status(404).send({
error: 'Not found'
});
});
if (app.get('env') === 'development') {
app.use(function(error, req, res, next) {
debug('http_status: %d, %s', error.status || 500, error.message);
next(error);
});
}
app.use(function(error, req, res) {
res.status(error.status || 500).send({
error: 'Internal server error'
});
});
Catch the uncaught errors that weren't wrapped in a domain or try catch statement
Note: Do not use this in modules, but only in applications, as otherwise, we could have multiple of these bound
process.on('exit', function(code) {
});
process.on('uncaughtException', function(err) {
console.log(err)
});
process.on('SIGINT', function() {
process.exit(0);
});