Catch express bodyParser error

Question

I want to catch the error from the bodyParser() middleware when I send a json object and it is invalid because I want to send a custom response instead of a generic 400 erro

Answer 1

I think your best bet is to check for SyntaxError:

app.use(function (error, req, res, next) {
  if (error instanceof SyntaxError) {
    sendError(res, myCustomErrorMessage);
  } else {
    next();
  }
});