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express-decorator-di

v1.0.3

Published

This is the DI library for the expressjs

Downloads

10

Readme

express-decorators-di Package

express-decorators-di Package is a lightweight, annotation-based framework for building RESTful APIs using Express and TypeScript. It leverages decorators to simplify the definition and organization of controllers, routes, middlewares, and dependency injection.

Features

  • Annotation-based Controllers and Routes: Use decorators to define controllers and routes.
  • Middleware Support: Easily apply middlewares to routes.
  • Dependency Injection: Built-in dependency injection for managing services.
  • Modular Architecture: Organize your application into modules for better structure and maintainability.
  • Async Handler: Simplify async route handling.

Installation

npm install express-decorators-di

Using the controller

Use the @Controller decorator to define a controller and the @Get, @Post, @Put, and @Delete decorators to define routes.

import { Controller, Get, Post, Body, Req, Res, Next } from 'my-npm-package'; import { Request, Response, NextFunction } from 'express';

@Controller('/users') export class UserController { @Get('/') getAllUsers(req: Request, res: Response) { // Your logic here res.send('Get all users'); }

@Post('/') createUser(@Body() body: any, @Res() res: Response) { // Your logic here res.send(Create user with data: ${JSON.stringify(body)}); } }

Using the Middlewares

import { Controller, Get, UseMiddlewares } from 'my-npm-package'; import { Request, Response, NextFunction } from 'express';

function logMiddleware(req: Request, res: Response, next: NextFunction) { console.log('Request URL:', req.url); next(); }

@Controller('/logs') export class LogController { @Get('/') @UseMiddlewares(logMiddleware) getLogs(req: Request, res: Response) { res.send('Check console for logs'); } }

Using Injectable Decorator

import { Injectable } from 'my-npm-package';

@Injectable() export class UserService { getUsers() { return ['User1', 'User2']; } }

import { Controller, Get } from 'my-npm-package'; import { UserService } from './user.service';

@Controller('/users') export class UserController { constructor(private userService: UserService) {}

@Get('/') getAllUsers(req: Request, res: Response) { const users = this.userService.getUsers(); res.send(users); } }

Creating a Module

import { Module } from 'my-npm-package'; import { UserController } from './user.controller'; import { UserService } from './user.service';

@Module({ controllers: [UserController], providers: [UserService], }) export class UserModule {}

Bootstrapping the Application

import { createApp } from 'my-npm-package'; import { UserModule } from './user.module';

const app = createApp(UserModule);

app.listen(3000, () => { console.log('Server is running on port 3000'); });