Node Micro-Services Common Code

For ease of code sharing between different projects

Install

$ npm i @jagota-brothers/common

Usage Example:

// Other imports
import { notFoundError, currentUser } from '@jagota-brothers/common';

const app = express();

app.get('/', currentUser, (req, res) => {
    // if user is logged in, this would be defined
    const userInfo = req.user;
    // Rest of stuffs
});

// Other routes

// route for 404
app.all('*', async () => {
    throw new NotFoundError();
})

Custom Errors available

authorizationError : 401, Can use for unauthorized request.

badRequestError : 400, expects a string as parameter.

databaseError : 500, Failed to connect to DB.

notFoundError : 404, Not Found.

requestValidationError : 400, For failed validation (express-validator) requests.

Custom Middlewares

currentUser :

• Checks cookie in request to see if user JWT is sent along with request.
• Attaches data in JWT to request as req.user.

authorize : fn

• Should only be used after currentUser middleware.
• Takes an optional array of roles (string) as parameter.
• Checks if that role is present in req.user.

errorHandler :

• Global catch block.
• Use as last middleware for the App.

validateRequest : fn

• Accepts validation Schema (from express-validator) as parameter
• Validates incoming data in request against schema & throws error if data is invalid

The middlewares marked as fn should be used as a function.

Example:

const validRolesToCreateArticle = ['author', 'admin'];

app.post('/article', currentUser, authorize(validRolesToCreateArticle), (req, res) => {
    // Implementation for this route    
})

License

This package is created & published under MIT License.