hapi-swagger

This is a OpenAPI (aka Swagger) plug-in for Hapi When installed it will self document the API interface in a project.

Compatibility

Version	Hapi	Joi	Node	Release Notes
`17.x`	`>=20.0.0 @hapi/hapi`	`>=17.0.0 joi`	`>=16`	Release
`16.x`	`>=20.0.0 @hapi/hapi`	`>=17.0.0 joi`	`>=14`	#795
`15.x`	`>=20.0.0 @hapi/hapi`	`>=17.0.0 joi`	`>=14`	#782
`14.x`	`>=19.0.0 @hapi/hapi`	`>=17.0.0 joi`	`>=12`	#680
`13.x`	`>=19.0.0 @hapi/hapi`	`>=17.0.0 @hapi/joi`	`>=12`	#660
`12.x`	`>=19.0.0 @hapi/hapi`	`>=17.0.0 @hapi/joi`	`>=12`	#644
`11.x`	`>=18.4.0 @hapi/hapi`	`>=16.0.0 @hapi/joi`	`>=8`	#631
`10.x`	`>=18.3.1 @hapi/hapi`	`>=14.0.0 @hapi/joi`	`>=8`	#587
`9.x`	`>=17 hapi`	`<14.0.0`	`>=8`	#487
`7.x`	`<17 hapi`	???	???	#325

Installation

You can add the module to your Hapi using npm:

> npm install hapi-swagger --save

hapi-swagger no longer bundles joi to fix #648. Install hapi-swagger with peer dependencies using:

npx install-peerdeps hapi-swagger

If you want to view the documentation from your API you will also need to install the inert and vision plugs-ins which support templates and static content serving.

> npm install @hapi/inert --save
> npm install @hapi/vision --save

Documentation

Quick start

In your Hapi apps please check the main JavaScript file and add the following code to already created a Hapi server object. You will also add the routes for you API as describe on hapi website.

const Hapi = require('@hapi/hapi');
const Inert = require('@hapi/inert');
const Vision = require('@hapi/vision');
const HapiSwagger = require('hapi-swagger');
const Pack = require('./package');

(async () => {
    const server = Hapi.server({
        port: 3000,
        host: 'localhost'
    });

    const swaggerOptions = {
        info: {
                title: 'Test API Documentation',
                version: Pack.version,
            },
        };

    await server.register([
        Inert,
        Vision,
        {
            plugin: HapiSwagger,
            options: swaggerOptions
        }
    ]);

    try {
        await server.start();
        console.log('Server running at:', server.info.uri);
    } catch(err) {
        console.log(err);
    }

    server.route(Routes);
})();

Tagging your API routes

As a project may be a mixture of web pages and API endpoints you need to tag the routes you wish Swagger to document. Simply add the tags: ['api'] property to the route object for any endpoint you want documenting.

You can even specify more tags and then later generate tag-specific documentation. If you specify tags: ['api', 'foo'], you can later use /documentation?tags=foo to load the documentation on the HTML page (see next section).

{
    method: 'GET',
    path: '/todo/{id}/',
    options: {
        handler: handlers.getToDo,
        description: 'Get todo',
        notes: 'Returns a todo item by the id passed in the path',
        tags: ['api'], // ADD THIS TAG
        validate: {
            params: Joi.object({
                id : Joi.number()
                        .required()
                        .description('the id for the todo item'),
            })
        }
    },
}

Once you have tagged your routes start the application. The plugin adds a page into your site with the route /documentation, so the the full URL for the above options would be http://localhost:3000/documentation.

Typescript

hapi-swagger exports its own typescript definition file that can be used when registering the plugin with Hapi. See example below:

Install Typescript Definition Files

npm i @types/hapi__hapi @types/hapi__inert @types/hapi__joi @types/hapi__vision @types/node hapi-swagger --save-dev

Register Plugin with Typescript

import * as Hapi from '@hapi/hapi';
import * as HapiSwagger from 'hapi-swagger';

// code omitted for brevity

const swaggerOptions: HapiSwagger.RegisterOptions = {
    info: {
        title: 'Test API Documentation'
    }
};

const plugins: Array<Hapi.ServerRegisterPluginObject<any>> = [
    {
        plugin: Inert
    },
    {
        plugin: Vision
    },
    {
        plugin: HapiSwagger,
        options: swaggerOptions
    }
];

await server.register(plugins);

Contributing

Read the contributing guidelines for details.

Thanks

I would like to thank all that have contributed to the project over the last couple of years. This is a hard project to maintain, getting Hapi to work with Swagger is like putting a round plug in a square hole. Without the help of others it would not be possible.