freeCodeCamp/server/middlewares/error-handlers.js

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import errorHanlder from 'errorhandler';
import accepts from 'accepts';
export default function prodErrorHandler() {
if (process.env.NODE_ENV === 'development') {
return errorHanlder({ log: true });
}
// error handling in production.
// disabling eslint due to express parity rules for error handlers
return function(err, req, res, next) { // eslint-disable-line
// respect err.status
if (err.status) {
res.statusCode = err.status;
}
// default status code to 500
if (res.statusCode < 400) {
res.statusCode = 500;
}
// parse res type
var accept = accepts(req);
var type = accept.type('html', 'json', 'text');
var message = 'opps! Something went wrong. Please try again later';
if (type === 'html') {
req.flash('errors', {
msg: message
});
return res.redirect('/');
// json
} else if (type === 'json') {
res.setHeader('Content-Type', 'application/json');
return res.send({
message: message
});
// plain text
} else {
res.setHeader('Content-Type', 'text/plain');
return res.send(message);
}
};
}