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tsyringe-express

v0.1.0

Published

Simple express decorators to use with tsyringe di

Downloads

24

Readme

Tsyringe Express Decorators

This package provide some simple decorators to declare ExpressJs controller classes and resolve controllers dependencies with Microsoft Tsyringe dependency injection container.

Dependencies

  • ExpressJs (https://www.npmjs.com/package/express)
  • Tsyringe (https://www.npmjs.com/package/tsyringe)
  • Reflect-metadata (https://www.npmjs.com/package/reflect-metadata)

the package reflect-metadata should be imported in the project entrypoint.

Example

import "reflect-metadata";
import { Controller, Action, HttpMethod, attachController } from "tsyringe-express";
import { container, injectable } from "tsyringe";
import * as express from "express";

/**
 * Simple class that provide html to controller
 */
class HtmlProvider {

    public getHtml(): string {
        return "<html><body><h1>It works!</h1></body></html>";
    }

}

/**
 * Simple controller, that listen on route '/examples'
 * Depends on HtmlProvider to render html
 */
@Controller({ route: "/examples" })
@injectable()
class ExampleController {

    /**
     * Constructor with dependencies
     */
    constructor(private htmlProvider: HtmlProvider) {}
    
    /**
     * itworks action, listen on route '/examples/itworks'
     * Should have express Request and Response as parameters
     */
    @Action({
        route: "/itworks",
        method: HttpMethod.GET,
        middlewares: [
            function (req, res, next) {
                console.log("Middleware activated!");
                next();
            }
        ]
    })
    public itWorksAction(req: express.Request, res: express.Response) {
        res.status(200).send( this.htmlProvider.getHtml());
    }
}

const app = express();
attachController(app, container, [ ExampleController ]);

app.listen(3000);