express.js global try/catch

Question

I'm developing a rest server on Node JS with Express.

I'm trying to wrap all my endpoints in try\catch block, so a central point of error will response back to the sender with details. My problem that response (res instance) is alive for each of the endpoints methods, but I don't know how to make it global.

try {
    app.get('/webhook', function (req, res) {
        webhook.register(req, res);
    });

    app.get('/send', function (req, res) {
        sendAutoMessage('1004426036330995');
    });

    app.post('/webhook/subscribe', function (req, res) {
        webhook.subscribe("test");
    });

    app.post('/webhook/unsubscribe', function (req, res) {
        webhook.unsubscribe("test");
    });
} catch (error) {
    //response to user with 403 error and details
}

Answer 1

There is a library (express-async-errors) which could suit your needs. This enables you to write async route handlers without wrapping the statements in try/catch blocks and catch them with global error handler. To make this work you must:
1. Install the express-async-errors package
2. Import package (before the routes)
3. Set up global express error handler
4. Write async route handlers (More info about this)

Example usage:

import express from 'express';
import 'express-async-errors';

const app = express();

// route handlers must be async
app.get('/webhook', async (req, res) => {
    webhook.register(req, res);
});

app.get('/send', async (req, res) => {
    sendAutoMessage('1004426036330995');
});

app.post('/webhook/subscribe', async (req, res) => {
    webhook.subscribe("test");
});

app.post('/webhook/unsubscribe', async (req, res) => {
    webhook.unsubscribe("test");
});

// Global error handler - route handlers/middlewares which throw end up here
app.use((err, req, res, next) => {
    // response to user with 403 error and details
});