swagger-jsdoc

swagger-jsdoc enables to integrate Swagger using JSDoc.

Supported Swagger Versions

• 2.0

Install

$ npm install swagger-jsdoc --save

Quick Start

swagger-jsdoc returns the validated swagger specification as JSON.

var swaggerJSDoc = require('swagger-jsdoc');

var options = {
  swaggerDefinition: {
    info: {
      title: 'Hello World', // Title (required)
      version: '1.0.0', // Version (required)
    },
  },
  apis: ['./routes.js'], // Path to the API docs
};

// Initialize swagger-jsdoc -> returns validated swagger spec in json format
var swaggerSpec = swaggerJSDoc(options);

At this time you can do with the swaggerSpec whatever you want. The simplest way would be serving it straight to the outside world:

app.get('/api-docs.json', function(req, res) {
  res.setHeader('Content-Type', 'application/json');
  res.send(swaggerSpec);
});

You could also use a framework like swagger-tools to serve the spec and a swagger-ui.

How to document the API

The API can now be documented in JSDoc-style with swagger spec in YAML.

/**
 * @swagger
 * /login:
 *   post:
 *     description: Login to the application
 *     produces:
 *       - application/json
 *     parameters:
 *       - name: username
 *         description: Username to use for login.
 *         in: formData
 *         required: true
 *         type: string
 *       - name: password
 *         description: User's password.
 *         in: formData
 *         required: true
 *         type: string
 *     responses:
 *       200:
 *         description: login
 */
app.post('/login', function(req, res) {
  res.json(req.body);
});

Re-using Model Definitions

A model may be the same for multiple endpoints (Ex. User POST,PUT responses). In place of writing (or copy and pasting) the same code into multiple locations, which can be error prone when adding a new field to the schema. You can define a model and re-use it across multiple endpoints. You can also reference another model and add fields.

/**
 * @swagger
 * definition:
 *   NewUser:
 *     type: object
 *     required:
 *       - username
 *       - password
 *     properties:
 *       username:
 *         type: string
 *       password:
 *         type: string
 *         format: password
 *   User:
 *     allOf:
 *       - $ref: '#/definitions/NewUser'
 *       - required:
 *         - id
 *       - properties:
 *         id:
 *           type: integer
 *           format: int64
 */

/**
   * @swagger
   * /users:
   *   get:
   *     description: Returns users
   *     produces:
   *      - application/json
   *     responses:
   *       200:
   *         description: users
   *         schema:
   *           type: array
   *           items: 
   *             $ref: '#/definitions/User'
   */
  app.get('/users', function(req, res) {
    res.json([ {
      id: 1,
      username: 'jsmith',
    }, {1
      id: 2,
      username: 'jdoe',
    } ]);
  });

  /**
   * @swagger
   * /users:
   *   post:
   *     description: Returns users
   *     produces:
   *       - application/json
   *     parameters:
   *       - name: user
   *         description: User object
   *         in:  body
   *         required: true
   *         type: string
   *         schema:
   *           $ref: '#/definitions/NewUser'
   *     responses:
   *       200:
   *         description: users
   *         schema:
   *           $ref: '#/definitions/User'
   */
  app.post('/users', function(req, res) {
    // Generate ID
    req.body.id = Math.floor(Math.random() * 100) * 1
    res.json(req.body);
  });

Example App

There is an example app in the example subdirectory. To use it you can use the following commands:

$ git clone https://github.com/Surnet/swagger-jsdoc.git
$ cd swagger-jsdoc
$ npm install
$ npm start

The swagger spec will be served at http://localhost:3000/api-docs.json