Nodejs: How to catch an exception from middleware?

Question

I\'m using node.js and the \"less\" compiler middleware:

app.configure(function() {
    // ...
    app.use(express.compiler({ src: __dirname + \'/public\', e         


        

Answer 1

Ah, ok, got it. The trick is to leave away the development errorHandler

app.configure('development', function() {
    // app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});

It seems to swallow calls to app.error, so now this works:

app.error(function(err, req, res, next) {
    sys.puts("APP.ERROR:" + sys.inspect(err));
    next(err);
});

This shows the correct error instead of [object Object]