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swagger-express-ts

Automatically generate and serve swagger.json v2.0.

Getting started

First, install inversify-express-utils.

npm install inversify inversify-express-utils reflect-metadata --save

Install swagger-express-ts.

npm install swagger-express-ts --save

The Basics

Step 1: configure express

import * as bodyParser from "body-parser";
import * as express from "express";
import "reflect-metadata";
import { Container } from "inversify";
import { interfaces, InversifyExpressServer, TYPE } from "inversify-express-utils";
import { VersionController } from "./version/version.controller";
import * as swagger from "swagger-express-ts";
import { SwaggerDefinitionConstant } from "swagger-express-ts";
const config = require ( "../config.json" );

// set up container
const container = new Container ();

// note that you *must* bind your controllers to Controller
container.bind<interfaces.Controller> ( TYPE.Controller )
    .to( VersionController ).inSingletonScope().whenTargetNamed( VersionController.TARGET_NAME );

// create server
const server = new InversifyExpressServer ( container );

server.setConfig( ( app : any ) => {
    app.use( '/api-docs/swagger' , express.static( 'swagger' ) );
    app.use( '/api-docs/swagger/assets' , express.static( 'node_modules/swagger-ui-dist' ) );
    app.use( bodyParser.json() );
    app.use( swagger.express(
        {
            definition : {
                info : {
                    title : "My api" ,
                    version : "1.0"
                } ,
                models : {
                    Version : {
                        properties : {
                            id : {
                                type : SwaggerDefinitionConstant.Model.Property.Type.STRING ,
                                required : true
                            } ,
                            name : {
                                type : SwaggerDefinitionConstant.Model.Property.Type.STRING ,
                                required : true
                            } ,
                            description : {
                                type : SwaggerDefinitionConstant.Model.Property.Type.STRING
                            } ,
                            version : {
                                type : SwaggerDefinitionConstant.Model.Property.Type.STRING
                            }
                        }
                    }
                } ,
                externalDocs : {
                    url : "My url"
                }
            }
        }
    ) );
} );

server.setErrorConfig( ( app : any ) => {
    app.use( ( err : Error , request : express.Request , response : express.Response , next : express.NextFunction ) => {
        console.error( err.stack );
        response.status( 500 ).send( "Something broke!" );
    } );
} );

const app = server.build();

app.listen( config.port );
console.info( "Server is listening on port : " + config.port );

Step 2: Decorate your controllers

import * as express from "express";
import { injectable } from "inversify";
import { controller, httpGet, interfaces, httpPost, requestParam, httpPut } from "inversify-express-utils";
import { SwaggerDefinitionConstant, ApiPath, ApiOperationGet, ApiOperationPost, ApiOperationPut } from "swagger-express-ts";
import "reflect-metadata";
const pkg = require ( "../../package.json" );

@ApiPath( {
    path : "/versions" ,
    name : "Version"
} )
@controller( "/versions" )
@injectable()
export class VersionController implements interfaces.Controller {
    public static TARGET_NAME : string = "VersionController";
    private data : [any] = [
        {
            id : "1" ,
            name : "Version 1" ,
            description : "Description Version 1" ,
            version : "1.0.0"
        } ,
        {
            id : "2" ,
            name : "Version 2" ,
            description : "Description Version 2" ,
            version : "2.0.0"
        }
    ];

    @ApiOperationGet( {
        description : "Get version object" ,
        summary : "Get version" ,
        responses : {
            200 : { description : "Success" , isArray : true , model : "Version" }
        }
    } )
    @httpGet( "/" )
    public getVersions ( request : express.Request , response : express.Response , next : express.NextFunction ) : void {
        response.json( this.data );
    }

    @ApiOperationPost( {
        description : "Post version object" ,
        summary : "Post new version" ,
        parameters : {
            body : { description : "New version" , required : true , model : "Version" }
        } ,
        responses : {
            200 : { description : "Success" } ,
            400 : { description : "Parameters fail" }
        }
    } )
    @httpPost( "/" )
    public postVersion ( request : express.Request , response : express.Response , next : express.NextFunction ) : void {
        if ( ! request.body ) {
            return response.status( 400 ).end();
        }
        this.data.push( request.body );
        response.json( request.body );
    }

    @ApiOperationGet( {
        path : "/{id}" ,
        description : "Get version by id" ,
        summary : "Get version detail" ,
        parameters : {
            path : {
                id : {
                    description : "Id of version" ,
                    type : SwaggerDefinitionConstant.Parameter.Type.STRING ,
                    required : true
                }
            }
        } ,
        responses : {
            200 : { description : "Success" , model : "Version" } ,
            404 : { description : "Version not exist" }
        } ,
        produces : [ SwaggerDefinitionConstant.Produce.JSON ]
    } )
    @httpGet( "/:id" )
    public getVersion ( @requestParam( "id" ) id : string , request : express.Request , response : express.Response , next : express.NextFunction ) : void {
        this.data.forEach( ( version : any )=> {
            if ( version.id === id ) {
                return response.json( version );
            }
        } );
        response.status( 404 ).end();
    }

    @ApiOperationPut( {
        path : "/{id}" ,
        description: "Put version by id",
        summary: "Put version",
        parameters : {
            path : {
                id : {
                    description : "Id of version" ,
                    type : SwaggerDefinitionConstant.Parameter.Type.STRING ,
                    required : true
                }
            } ,
            body : {
                description : "Updated version" ,
                model : "Version" ,
                required : true
            }
        } ,
        responses : {
            200 : { model : "Version" }
        }
    } )
    @httpPut( "/:id" )
    public putVersion ( @requestParam( "id" ) id : string , request : express.Request , response : express.Response , next : express.NextFunction ) : void {
        if ( ! request.body ) {
            return response.status( 400 ).end();
        }
        this.data.forEach( ( version : any , index : number )=> {
            if ( version.id === id ) {
                let newVersion = request.body;
                version.id = newVersion.id;
                version.name = newVersion.name;
                version.description = newVersion.description;
                version.version = newVersion.version;
                this.data[ index ] = version;
                return response.json( version );
            }
        } );
        response.status( 404 ).end();
    }
}

Step 3: Test

Start your server and test on url : /api-docs/swagger.json

Extra

Serve swagger-ui in your API

You can serve swagger.json and swagger-ui in your API.

npm install swagger-ui-dist --save

Create index.html in new directory "swagger".

<!-- HTML for static distribution bundle build -->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Swagger UI</title>
    <link href="https://fonts.googleapis.com/css?family=Open+Sans:400,700|Source+Code+Pro:300,600|Titillium+Web:400,600,700"
          rel="stylesheet">
    <link rel="stylesheet" type="text/css" href="/api-docs/swagger/assets/swagger-ui.css">
    <link rel="icon" type="image/png" href="/api-docs/swagger/assets/favicon-32x32.png" sizes="32x32"/>
    <link rel="icon" type="image/png" href="/api-docs/swagger/assets/favicon-16x16.png" sizes="16x16"/>
    <style>
        html {
            box-sizing: border-box;
            overflow: -moz-scrollbars-vertical;
            overflow-y: scroll;
        }

        *,
        *:before,
        *:after {
            box-sizing: inherit;
        }

        body {
            margin: 0;
            background: #fafafa;
        }
    </style>
</head>

<body>

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
     style="position:absolute;width:0;height:0">
    <defs>
        <symbol viewBox="0 0 20 20" id="unlocked">
            <path d="M15.8 8H14V5.6C14 2.703 12.665 1 10 1 7.334 1 6 2.703 6 5.6V6h2v-.801C8 3.754 8.797 3 10 3c1.203 0 2 .754 2 2.199V8H4c-.553 0-1 .646-1 1.199V17c0 .549.428 1.139.951 1.307l1.197.387C5.672 18.861 6.55 19 7.1 19h5.8c.549 0 1.428-.139 1.951-.307l1.196-.387c.524-.167.953-.757.953-1.306V9.199C17 8.646 16.352 8 15.8 8z"></path>
        </symbol>

        <symbol viewBox="0 0 20 20" id="locked">
            <path d="M15.8 8H14V5.6C14 2.703 12.665 1 10 1 7.334 1 6 2.703 6 5.6V8H4c-.553 0-1 .646-1 1.199V17c0 .549.428 1.139.951 1.307l1.197.387C5.672 18.861 6.55 19 7.1 19h5.8c.549 0 1.428-.139 1.951-.307l1.196-.387c.524-.167.953-.757.953-1.306V9.199C17 8.646 16.352 8 15.8 8zM12 8H8V5.199C8 3.754 8.797 3 10 3c1.203 0 2 .754 2 2.199V8z"/>
        </symbol>

        <symbol viewBox="0 0 20 20" id="close">
            <path d="M14.348 14.849c-.469.469-1.229.469-1.697 0L10 11.819l-2.651 3.029c-.469.469-1.229.469-1.697 0-.469-.469-.469-1.229 0-1.697l2.758-3.15-2.759-3.152c-.469-.469-.469-1.228 0-1.697.469-.469 1.228-.469 1.697 0L10 8.183l2.651-3.031c.469-.469 1.228-.469 1.697 0 .469.469.469 1.229 0 1.697l-2.758 3.152 2.758 3.15c.469.469.469 1.229 0 1.698z"/>
        </symbol>

        <symbol viewBox="0 0 20 20" id="large-arrow">
            <path d="M13.25 10L6.109 2.58c-.268-.27-.268-.707 0-.979.268-.27.701-.27.969 0l7.83 7.908c.268.271.268.709 0 .979l-7.83 7.908c-.268.271-.701.27-.969 0-.268-.269-.268-.707 0-.979L13.25 10z"/>
        </symbol>

        <symbol viewBox="0 0 20 20" id="large-arrow-down">
            <path d="M17.418 6.109c.272-.268.709-.268.979 0s.271.701 0 .969l-7.908 7.83c-.27.268-.707.268-.979 0l-7.908-7.83c-.27-.268-.27-.701 0-.969.271-.268.709-.268.979 0L10 13.25l7.418-7.141z"/>
        </symbol>


        <symbol viewBox="0 0 24 24" id="jump-to">
            <path d="M19 7v4H5.83l3.58-3.59L8 6l-6 6 6 6 1.41-1.41L5.83 13H21V7z"/>
        </symbol>

        <symbol viewBox="0 0 24 24" id="expand">
            <path d="M10 18h4v-2h-4v2zM3 6v2h18V6H3zm3 7h12v-2H6v2z"/>
        </symbol>

    </defs>
</svg>

<div id="swagger-ui"></div>

<script src="/api-docs/swagger/assets/swagger-ui-bundle.js"></script>
<script src="/api-docs/swagger/assets/swagger-ui-standalone-preset.js"></script>
<script>
    window.onload = function () {

        // Build a system
        const ui = SwaggerUIBundle ({
            url: "/api-docs/swagger.json",
            dom_id: '#swagger-ui',
            deepLinking: true,
            presets: [
                SwaggerUIBundle.presets.apis,
                SwaggerUIStandalonePreset
            ],
            plugins: [
                SwaggerUIBundle.plugins.DownloadUrl
            ],
            layout: "StandaloneLayout",
            validatorUrl: null
        });

        window.ui = ui
    }
</script>
</body>

</html>

Configure your server like that.

app.use( '/api-docs/swagger', express.static( 'swagger' ) );
app.use( '/api-docs/swagger/assets', express.static( 'node_modules/swagger-ui-dist' ) );

Test it on url "/api-docs/swagger".

Project example

You can quickly test swagger-express-ts with the project example example-swagger-express-ts.

Features and API

For any questions, suggestions, or feature requests

Please file an issue!

License

License under the MIT License (MIT)

Copyright © 2018 Olivier LIN-SI-CHENG

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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