Express Status Guard
Inspirated by Haskells monad guards, this middleware frees you from the burden of repetitive error handling in your callbacks and let's you focus on your business logic.
Just app.use(guard())
.
Before
dbRequest.do(function (err, data) {
if (err) return res.send(500);
dbRequest2.do(data, function (err, data2, data3) {
if (err) return res.status(500).send('Uh! Fail.');
dbRequest3.do(data2, data3, function (err, data4) {
if (err) return res.status(500).json({error: 'meeh'});
res.json({result: data4});
});
});
After
dbRequest.do(res.guard(500, function (data) {
dbRequest2.do(data, res.guard(500, 'Uh! Fail.', function (data2, data3) {
dbRequest3.do(data2, data3, res.guard(500, {error: 'meeh'}, function (data4) {
res.json({result: data4});
}));
}));
}));