My problem seems to be fairly simple and common, but nevertheless I can't seem to find anything about it after hours of research:
I want to retrieve JSON-data in Node.js via http-POST using Express. To keep it simple, I want to use the app.use(express.json()); function (see code).
When the JSON-data is correct JSON-syntax, everything works fine, but when there is a syntax error in the JSON-data, it handles the error on its own, automatically replying to the client and logging a huge error message on the console. What I'd like to do is to handle the error the way I want, but I'm not sure how I can manage to do that.
The code I'm using is the following:
const express = require('express');
const app = express();
app.use(express.json());
app.post('/', function(req, res) {
// do something with the retreived JSON-data
});
I would be very thankful if somebody could give me a tip/solution! :)
You could handle malformed JSON errors using this, as the error is an instance of SyntaxError
app.use((error, request, response, next) => {
if (error instanceof SyntaxError)
response.status(404).send('your error message');
else
next();
});