Swagger for Typescript-rest

This is a tool to generate swagger files from a typescript-rest project.

Table of Contents

• Swagger for Typescript-rest
  • Installation
  • Usage
    • Swagger Decorators
      • @Response
      • @Example
      • @Tags
      • @Consumes
      • @Produces
      • @Hidden
      • @IsInt, @IsLong, @IsFloat, @IsDouble
    • SwaggerConfig.json

Installation

npm install typescript-rest-swagger -g

Usage

swaggerGen -c ./swaggerConfig.json
swaggerGen -c ./swaggerConfig.js #.js files are also allowed as config files
swaggerGen -c ./swaggerConfig.json -t # load {cwd}/tsconfig.json
swaggerGen -c ./swaggerConfig.json -p ./tsconfig.json # load custom tsconfig.json

Where the swaggerConfig.json file, contains settings about the swagger generation. For example:

{
    "swagger": {
        "outputDirectory": "./dist",
        "entryFile": "./tests/data/apis.ts"
    }
}

Where the tsconfig.json file contains compilerOptions. For example:

{
    "compilerOptions": {
        "baseUrl": ".",
        "paths": {
            "@/*": ["src/*"]
        }
    }
}

For example above options are required for swaggerGen to understand relative imports like import something from '@/something'.

Swagger Decorators

The documentation will be generated consulting all typescript-rest decorators present on your code. However, there are some additional informations that can be provided, only with documentation purposes, through some other decorators present into this library.

Some examples:

import {Path, Accept, GET} from 'typescript-rest';
import {Tags} from 'typescript-rest-swagger';

@Path('mypath')
export class MyService {
    @GET
    @Tags('adminMethod', 'otheTag')
    @Accept('text/html')
    test( ): string {
        return 'OK';
    }

    @GET
    @Path('secondpath')
    test2( @QueryParam('testParam')test?: string ): Person {
        return {name: 'OK'};
    }
}

It is also important to observe that all JsDoc provided on your methods, classes, and parameters is outputed into the generated swagger file:

@Accept('text/plain')
@Path('mypath')
export class MyService {
    /**
     * This description will be used to describe the get operation of path '/mypath' on the generated swagger
     * @param test And this will describe the parameter test of this same operation
     */
    @GET
    @Path('secondpath')
    test2( @QueryParam('testParam')test?: string ): Person {
        return {name: 'OK'};
    }
}

These are the available swagger decorators, provided by typescript-rest-swagger:

@Response

A decorator to document the responses that a given service method can return. It is used to generate documentation for the REST service.

interface MyError {
   message: string
}

@Path('people')
class PeopleService {
  @Response<string>(200, 'Retrieve a list of people.')
  @Response<MyError>(401, 'The user is unauthorized.', {message: 'The user is not authorized to access this operation.'})
  @GET
  getPeople(@Param('name') name: string) {
     // ...
  }
}

A Default response is already created in swagger documentation from the method return analisys. So any response declared through this decorator is an additional response created.

@Example

Used to provide an example of method return to be added into the method response section of the generated documentation for this method.

@Path('people')
class PeopleService {
  @Example<Array<Person>>([{
    name: 'Joe'
  }])
  @GET
  getPeople(@Param('name') name: string): Person[] {
     // ...
  }
}

@Tags

Add tags for a given method on generated swagger documentation.

@Path('people')
class PeopleService {
  @Tags('adiministrative', 'department1')
  @GET
  getPeople(@Param('name') name: string) {
     // ...
  }
}

@Consumes

Document the consumes property in generated swagger docs

@Path('people')
@Consumes('text/html')
class PeopleService {
  @PUT
  createPeople(@Param('name') name: string, people: People) {
     // ...
  }
}

@Produces

Document the produces property in generated swagger docs

@Path('people')
@Produces('text/html')
class PeopleService {
  @GET
  getPeople(@Param('name') name: string) {
     // ...
  }
}

A Default produces is already created in swagger documentation from the method return analisys. You can use this decorator to override this default produces.

@Hidden

Allow to hide some APIs from swagger docs (ex: test or dev APIs, etc ...). This decorator can be applied for the whole class or only a single method

@Path('people')
@Hidden()
class PeopleService {
  @GET
  getPeople(@Param('name') name: string) {
     // ...
  }
}

@IsInt, @IsLong, @IsFloat, @IsDouble

Document the type of a number property or parameter in generated swagger docs. If no decorator is present, the number type defaults to double format.

class Person {
    @IsInt id: number;
}

@Path('people')
class PeopleService {
    @Path(':id')
    @GET
    getById(@PathParam('id') @IsLong id: number) {
        // ...
    }
}

Because decorators don't work on type and interface properties, this can also be specified as a JSDoc tag.

interface Person {
    /**
     * The person's id
     * @IsInt
     */
    id: number;
}

SwaggerConfig.json

The swagger config file supports the following properties:

Where the SecurityDefinition contract is defined as:

{
    [name: string]: {
        type: string;
        name?: string;
        authorizationUrl?: string;
        tokenUrl?: string;
        flow?: string;
        in?: string;
        scopes?: { [scopeName: string]: string; }
    }
}

See an example:

{
    "swagger": {
        "outputDirectory": "./dist",
        "entryFile": "./controllers/*.ts",
        "outputFormat": "openapi_3",
        "host": "localhost:3000",
        "version": "1.0",
        "name": "Typescript-rest Test API",
        "description": "a description",
        "license": "MIT",
        "basePath": "/v1",
        "securityDefinitions": {
            "api_key": {
                "type": "apiKey",
                "name": "access_token",
                "in": "query"
            }
        },
        "ignore": [
          "**/node_modules/**"
        ]
    }
}

or in yaml format: See an example:

swagger:
  outputDirectory: ./dist
  entryFile: 
    - ./controllers/*.ts
  outputFormat: openapi_3
  host: localhost:3000
  version: 1.0
  name: Typescript-rest Test API
  description: A description
  license: MIT
  basePath: /v1
  securityDefinitions:
    api_key:
      type: apiKey
      name: access_token
      in: query
  ignore:
    - /node_modules/**