Next API Composer

Your implementations of API Routes for your Next.js applications will be much easier with this library.

You have to code the API Routes like:

// api/example.ts
export default async (req, res) => {
  if (req.method === 'GET') {
    // do something
    res.json({ foo: 'bar' });
    return;
  }

  res.setHeader('Allow', 'GET');
  if (req.method === 'OPTIONS') {
    res.status(204).send(null);
  } else {
    res.status(405).send(null);
  }
};

With this library:

// api/example.ts
export default nextApi({
  GET: async (req, res) => {
    // do something
    res.json({ foo: 'bar' });
  },
});

Installation

• npm i next-api-composer

Supported Methods

• GET
• POST
• PUT
• PATCH
• DELETE

HTTP Error Handling

• This library includes various HTTP Error types such as HTTP400BadRequest, which extends RouteError.
• RouteError has a method send(res: Sendable).
• If any errors extending RouteError is thrown in the handler, they'll be handled with calling the send method of the error.
• If any errors other than RouteError is thrown in the handler, the handler will emit HTTP 500 error.
• For details, see src/index.ts.

// api/example.ts
export default nextApi({
  GET: async (req, res) => {
    // Given, the function authenticate will return false
    // if the request does not have a valid token in its HTTP header.
    if (!authenticate(req)) {
      throw new HTTP401Unauthorized();
    }

    // do something
    res.json({ foo: 'bar' });
  },
});