Swagger module

Provides a Swagger UI that can be added into microservices and is seamlessly integrated with existing REST and Commandable HTTP services.

Packages

The module contains the following packages:

Use

Install the NPM package as

npm install pip-services3-swagger-nodex --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 service. You can also enable swagger by default in the constractor by setting _swaggerEnable property.

export class MyRestService extends RestService {
    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/services/myservice.yml');
    }
}

The Open API specification for the service 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: correlation_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 services. Also explicitely adding HttpEndpoint allows to share the same port betwee REST services and the Swagger service.

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

# Swagger Service
- descriptor: "pip-services:swagger-service:http:default:1.0"

# My RESTful Service
- 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-services3-rpc-nodex';
import { DefaultSwaggerFactory } from 'pip-services3-swagger-nodex';

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