Express.js middleware for validating content type

Express.js middleware for validating content type. Very simple but often sorely needed. Sends response with status code 415 (Unsupported Media Type) if content type doesn't match. Use Express's req.is behind the scenes.

Usage

ES modules

import validateContentType from '@natlibfi/express-validate-content-type';
app.post('/', validateContentType({type: 'application/json'}), (req, res) => {...});

Node.js require

const {default: validateContentType} = require('@natlibfi/express-validate-content-type');
app.post('/', validateContentType({type: 'application/json'}), (req, res) => {...});

License and copyright

Copyright (c) 2019, 2024-2025 University Of Helsinki (The National Library Of Finland)

This project's source code is licensed under the terms of MIT license