Koa Bundle

A bundle of Koa libraries and tools for building Koa APIs. The Koa Bundle provides exports and factory methods for:

• KoaJS
• Koa Router
• Koa Mount
• Koa Bodyparser
• Koa Cors
• Koa Pino Logger
• Koa JSON
• Swagger JSDoc
• Koa Swagger UI

There are are also custom middleware that provides:

• Correlation middleware to set a correlation-id in the context state and as well as x-response-time in miliseconds to the response header.
• Error middleware to handle errors thrown and set response status code and body.
• Request validation middleware (supported by AJV) that will validate request headers, query parameters and body against a provided schema
• Generate swagger docs and UI route to attach as Koa middleware.

Installation

npm add koa-bundle

Example

To set up a basic Koa app with a single route, attach all the bundled middleware and create swagger docs and UI.

import { app, middleware, docs, route, mount } from 'koa-bundle';

app.use(middleware.composedMiddlewares({ name: 'example API', level: 'debug' }));
app.use(docs.generateDocsRoute(
  'Example API Docs',
  'get',
  '/docs',
  'Example API Docs',
  '0.0.1',
  'Description of API Docs',
  'localhost:9000',
  '/',
  ['application/json'],
  ['application/json'],
  ['./**/*.ts', './**/*.js],
  [{ name: 'example', description: 'An example tag' }],
  { swaggerOptions: { url: `http://localhost:9000/docs/swagger.json`, deepLinking: true, } },
));

/**
 * @swagger
 * /foo:
 *   tags:
 *     - example
 *   description: Example route
 *   get:
 *     responses:
 *       200:
 *         description: OK
 */
app.use(mount('/foo', route('exampleRoute', '/', 'get', [
  (ctx) => {
    ctx.response.statusCode = 200;
  },
])));

app.listen(9000);

Publish

npm run compile
cd dist
npm publish