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

Ok, found it:

bodyParser() is a convenience function for json(), urlencoded() and multipart(). I just need to call to json(), catch the error and call to urlencoded() and multipart().

bodyParser source

app.use (express.json ());
app.use (function (error, req, res, next){
    //Catch json error
    sendError (res, myCustomErrorMessage);
});

app.use (express.urlencoded ());
app.use (express.multipart ());