Swagger UI for HTTP/REST Communication Components in Node.js / ES2017

This module is a part of the Pip.Services polyglot microservices toolkit.

The swagger module provides a Swagger UI that can be added into microservices and seamlessly integrated with existing REST and Commandable HTTP services.

The module contains the following packages:

• Build - Swagger service factory
• Services - Swagger UI service

Quick links:

• Change Log
• Get Help
• Contribute

Use

Install the NPM package as

npm install pip-services4-swagger-node --save

Develop a RESTful service component. For example, it may look the following way. In the register method we load an Open API specification for the controller. You can also enable swagger by default in the constractor by setting _swaggerEnable property.

export class MyRestController extends RestController {
    public constructor() {
        super();
        this._baseRoute = "myservice";
        this._swaggerEnable = true;
    }

    private greeting(req, res) {
        let name = req.params.name;
        let response = "Hello, " + name + "!";
        this.sendResult(req, res, response);
    }
        
    public register() {
        this.registerRoute(
            'get', '/greeting', 
            new ObjectSchema(true)
                .withRequiredProperty("name", TypeCode.String),
            this.greeting
        );
        
        this.registerOpenApiSpecFromFile('./src/controllers/mycontroller.yml');
    }
}

The Open API specification for the controller shall be prepared either manually or using Swagger Editor

openapi: '3.0.2'
info:
  title: 'MyService'
  description: 'MyService REST API'
  version: '1'
paths:
  /myservice/greeting:
    get:
      tags:
        - myservice
      operationId: 'greeting'
      parameters:
      - name: trace_id
        in: query
        description: Correlation ID
        required: false
        schema:
          type: string
      - name: name
        in: query
        description: Name of a person
        required: true
        schema:
          type: string
      responses:
        200:
          description: 'Successful response'
          content:
            application/json:
              schema:
                type: 'string'

Include Swagger service into config.yml file and enable swagger for your REST or Commandable HTTP controllers. Also explicitely adding HttpEndpoint allows to share the same port between REST controllers and the Swagger controller.

---
...
# Shared HTTP Endpoint
- descriptor: "pip-services:endpoint:http:default:1.0"
  connection:
    protocol: http
    host: localhost
    port: 8080

# Swagger Controller
- descriptor: "pip-services:swagger-controller:http:default:1.0"

# My RESTful Controller
- descriptor: "myservice:service:rest:default:1.0"
  swagger:
    enable: true

Finally, remember to add factories to your container, to allow it creating required components.

...
import { DefaultRpcFactory } from 'pip-services4-rpc-node';
import { DefaultSwaggerFactory } from 'pip-services4-swagger-node';

export class MyProcess extends ProcessContainer {
  public constructor() {
    super("myservice", "MyService microservice");
    
    this._factories.add(new DefaultHttpFactory());
    this._factories.add(new DefaultSwaggerFactory());
    this._factories.add(new MyServiceFactory());
    ...
  }
}

Launch the microservice and open the browser to open the Open API specification at http://localhost:8080/greeting/swagger

Then open the Swagger UI using the link http://localhost:8080/swagger. The result shall look similar to the picture below.

Develop

For development you shall install the following prerequisites:

• Node.js 14+
• Visual Studio Code or another IDE of your choice
• Docker
• Typescript

Install dependencies:

npm install

Compile the code:

tsc

Run automated tests:

npm test

Generate API documentation:

./docgen.ps1

Before committing changes run dockerized build and test as:

./build.ps1
./test.ps1
./clear.ps1

Contacts

The Node.js version of Pip.Services is created and maintained by:

• Sergey Seroukhov
• Danil Prisyazhiy