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15 changed files with 294 additions and 100 deletions

1
.dockerignore Normal file
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node_modules

2
.env.example Normal file
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PORT=3000
UI_URL=http://localhost:3001

5
.gitignore vendored
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@ -32,4 +32,7 @@ lerna-debug.log*
!.vscode/settings.json
!.vscode/tasks.json
!.vscode/launch.json
!.vscode/extensions.json
!.vscode/extensions.json
# ENV
.env

16
Dockerfile Normal file
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@ -0,0 +1,16 @@
FROM node:18
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
ARG SERVER_PORT
ENV PORT $SERVER_PORT
EXPOSE $SERVER_PORT
CMD ["npm", "run", "start:dev"]

124
README.md
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@ -1,73 +1,65 @@
<p align="center">
<a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo-small.svg" width="200" alt="Nest Logo" /></a>
</p>
# Tiny URL Microservice
[circleci-image]: https://img.shields.io/circleci/build/github/nestjs/nest/master?token=abc123def456
[circleci-url]: https://circleci.com/gh/nestjs/nest
The Tiny URL Microservice is a simple URL shortening service built with Nest.js. It allows users to create shortened versions of long URLs, making them easier to share. This README provides an overview of the project, how to run it, and details about available routes.
<p align="center">A progressive <a href="http://nodejs.org" target="_blank">Node.js</a> framework for building efficient and scalable server-side applications.</p>
<p align="center">
<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/v/@nestjs/core.svg" alt="NPM Version" /></a>
<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/l/@nestjs/core.svg" alt="Package License" /></a>
<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/dm/@nestjs/common.svg" alt="NPM Downloads" /></a>
<a href="https://circleci.com/gh/nestjs/nest" target="_blank"><img src="https://img.shields.io/circleci/build/github/nestjs/nest/master" alt="CircleCI" /></a>
<a href="https://coveralls.io/github/nestjs/nest?branch=master" target="_blank"><img src="https://coveralls.io/repos/github/nestjs/nest/badge.svg?branch=master#9" alt="Coverage" /></a>
<a href="https://discord.gg/G7Qnnhy" target="_blank"><img src="https://img.shields.io/badge/discord-online-brightgreen.svg" alt="Discord"/></a>
<a href="https://opencollective.com/nest#backer" target="_blank"><img src="https://opencollective.com/nest/backers/badge.svg" alt="Backers on Open Collective" /></a>
<a href="https://opencollective.com/nest#sponsor" target="_blank"><img src="https://opencollective.com/nest/sponsors/badge.svg" alt="Sponsors on Open Collective" /></a>
<a href="https://paypal.me/kamilmysliwiec" target="_blank"><img src="https://img.shields.io/badge/Donate-PayPal-ff3f59.svg"/></a>
<a href="https://opencollective.com/nest#sponsor" target="_blank"><img src="https://img.shields.io/badge/Support%20us-Open%20Collective-41B883.svg" alt="Support us"></a>
<a href="https://twitter.com/nestframework" target="_blank"><img src="https://img.shields.io/twitter/follow/nestframework.svg?style=social&label=Follow"></a>
</p>
<!--[![Backers on Open Collective](https://opencollective.com/nest/backers/badge.svg)](https://opencollective.com/nest#backer)
[![Sponsors on Open Collective](https://opencollective.com/nest/sponsors/badge.svg)](https://opencollective.com/nest#sponsor)-->
## Table of Contents
## Description
- [Project Overview](#project-overview)
- [Prerequisites](#prerequisites)
- [Getting Started](#getting-started)
- [Using Docker Compose](#using-docker-compose)
- [Using .env File](#using-env-file)
- [API Routes](#api-routes)
- [Testing](#testing)
- [Contributing](#contributing)
- [License](#license)
[Nest](https://github.com/nestjs/nest) framework TypeScript starter repository.
## Project Overview
## Installation
This project is a simple URL shortening microservice built with Nest.js. It provides the following features:
- URL Shortening: Convert long URLs into short, easy-to-share versions.
- URL Expansion: Expand shortened URLs to their original long form And redirect users to the original URL.
## Prerequisites
Before you begin, ensure you have met the following requirements:
- Node.js installed on your machine.
- Docker and Docker Compose (if you prefer to use Docker).
- `.env` file (if not using Docker) with the necessary environment variables. You can use .env.exmaple as a reference.
## Getting Started
To get the project up and running, follow the instructions below.
### Using Docker Compose
1. Clone the repository:
```bash
git clone https://github.com/your-username/tiny-url-microservice.git
cd tiny-url-microservice
docker-compose -f docker-compose.yaml up -d --build
```
Your Nest.js server should now be running on port as like the port from the .env file.
## API Routes
# Shorten URL:
- Endpoint: POST /url-shortener/shorten
- Request Body: { "url": "https://example.com" }
- Response: { "data": "abc123", "status": 201 }
Expand URL:
Endpoint: GET /url-shortener/:shortUrl
Response: Redirects to the original long URL or redirect to the client UI 404 page if not found.
## Testing
To run the tests, run the following command:
```bash
$ npm install
```
## Running the app
```bash
# development
$ npm run start
# watch mode
$ npm run start:dev
# production mode
$ npm run start:prod
```
## Test
```bash
# unit tests
$ npm run test
# e2e tests
$ npm run test:e2e
# test coverage
$ npm run test:cov
```
## Support
Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please [read more here](https://docs.nestjs.com/support).
## Stay in touch
- Author - [Kamil Myśliwiec](https://kamilmysliwiec.com)
- Website - [https://nestjs.com](https://nestjs.com/)
- Twitter - [@nestframework](https://twitter.com/nestframework)
## License
Nest is [MIT licensed](LICENSE).
npm run test
```

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docker-compose.yaml Normal file
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@ -0,0 +1,12 @@
version: "3.8"
services:
nest-app:
build:
context: .
dockerfile: Dockerfile
args:
SERVER_PORT: ${SERVER_PORT}
ports:
- "${SERVER_PORT}:${SERVER_PORT}"
env_file:
- .env

135
package-lock.json generated
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@ -10,11 +10,15 @@
"license": "UNLICENSED",
"dependencies": {
"@nestjs/common": "^10.0.0",
"@nestjs/config": "^3.1.1",
"@nestjs/core": "^10.0.0",
"@nestjs/platform-express": "^10.0.0",
"@nestjs/swagger": "^7.2.0",
"dotenv": "^16.3.2",
"reflect-metadata": "^0.1.13",
"rxjs": "^7.8.1",
"shortid": "^2.2.16"
"shortid": "^2.2.16",
"swagger-ui-express": "^5.0.0"
},
"devDependencies": {
"@nestjs/cli": "^10.0.0",
@ -1683,6 +1687,32 @@
}
}
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"uuid": "9.0.0"
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"engines": {
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"version": "10.3.0",
"resolved": "https://registry.npmjs.org/@nestjs/core/-/core-10.3.0.tgz",
@ -1720,6 +1750,25 @@
}
}
},
"node_modules/@nestjs/mapped-types": {
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"resolved": "https://registry.npmjs.org/@nestjs/mapped-types/-/mapped-types-2.0.4.tgz",
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"peerDependencies": {
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"class-transformer": "^0.4.0 || ^0.5.0",
"class-validator": "^0.13.0 || ^0.14.0",
"reflect-metadata": "^0.1.12"
},
"peerDependenciesMeta": {
"class-transformer": {
"optional": true
},
"class-validator": {
"optional": true
}
}
},
"node_modules/@nestjs/platform-express": {
"version": "10.3.0",
"resolved": "https://registry.npmjs.org/@nestjs/platform-express/-/platform-express-10.3.0.tgz",
@ -1756,6 +1805,37 @@
"typescript": ">=4.8.2"
}
},
"node_modules/@nestjs/swagger": {
"version": "7.2.0",
"resolved": "https://registry.npmjs.org/@nestjs/swagger/-/swagger-7.2.0.tgz",
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"dependencies": {
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"js-yaml": "4.1.0",
"lodash": "4.17.21",
"path-to-regexp": "3.2.0",
"swagger-ui-dist": "5.11.0"
},
"peerDependencies": {
"@fastify/static": "^6.0.0",
"@nestjs/common": "^9.0.0 || ^10.0.0",
"@nestjs/core": "^9.0.0 || ^10.0.0",
"class-transformer": "*",
"class-validator": "*",
"reflect-metadata": "^0.1.12"
},
"peerDependenciesMeta": {
"@fastify/static": {
"optional": true
},
"class-transformer": {
"optional": true
},
"class-validator": {
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}
}
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"node_modules/@nestjs/testing": {
"version": "10.3.0",
"resolved": "https://registry.npmjs.org/@nestjs/testing/-/testing-10.3.0.tgz",
@ -2705,8 +2785,7 @@
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"resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
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},
"node_modules/array-flatten": {
"version": "1.1.1",
@ -3690,6 +3769,25 @@
"node": ">=6.0.0"
}
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"node_modules/dotenv": {
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"engines": {
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@ -5864,7 +5962,6 @@
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"dev": true,
"dependencies": {
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},
@ -6011,8 +6108,7 @@
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"dev": true
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},
"node_modules/lodash.memoize": {
"version": "4.1.2",
@ -7737,6 +7833,25 @@
"url": "https://github.com/sponsors/ljharb"
}
},
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"resolved": "https://registry.npmjs.org/swagger-ui-dist/-/swagger-ui-dist-5.11.0.tgz",
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},
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@ -8267,6 +8382,14 @@
"node": ">= 0.4.0"
}
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"bin": {
"uuid": "dist/bin/uuid"
}
},
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"version": "3.0.1",
"resolved": "https://registry.npmjs.org/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz",

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@ -21,11 +21,15 @@
},
"dependencies": {
"@nestjs/common": "^10.0.0",
"@nestjs/config": "^3.1.1",
"@nestjs/core": "^10.0.0",
"@nestjs/platform-express": "^10.0.0",
"@nestjs/swagger": "^7.2.0",
"dotenv": "^16.3.2",
"reflect-metadata": "^0.1.13",
"rxjs": "^7.8.1",
"shortid": "^2.2.16"
"shortid": "^2.2.16",
"swagger-ui-express": "^5.0.0"
},
"devDependencies": {
"@nestjs/cli": "^10.0.0",

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@ -2,9 +2,14 @@ import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { UrlShortenerModule } from './url-shortener/url-shortener.module';
import { DnsService } from './dns/dns.service';
import { ConfigModule } from '@nestjs/config';
@Module({
imports: [UrlShortenerModule],
imports: [
ConfigModule.forRoot({
isGlobal: true, // Makes the config globally available
}),UrlShortenerModule,
],
controllers: [AppController],
providers: [DnsService],
})

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@ -19,10 +19,6 @@ describe('DnsService', () => {
dnsLookupMock = (dns.lookup as unknown) as jest.Mock;
});
it('should be defined', () => {
expect(service).toBeDefined();
});
it('should return true for a valid URL', async () => {
dnsLookupMock.mockImplementation((hostname, callback) => callback(null, '1.1.1.1'));
expect(await service.isValidUrl('http://example.com')).toBe(true);

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@ -1,8 +1,16 @@
import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import * as dotenv from 'dotenv';
import { setupSwagger } from '../swagger';
dotenv.config();
async function bootstrap() {
const app = await NestFactory.create(AppModule);
await app.listen(3000);
const port = process.env.SERVER_PORT || 3004;
app.enableCors();
setupSwagger(app);
await app.listen(port);
console.log(`Application is running on: ${await app.getUrl()}`);
}
bootstrap();
bootstrap();

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@ -0,0 +1,5 @@
export interface ApiResponse {
data?: string;
error?: string;
status: number;
}

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@ -1,26 +1,37 @@
import { Controller, Post, Body, Get, Param, Redirect, HttpException, HttpStatus } from '@nestjs/common';
import { Controller, Post, Body, Get, Param, HttpException, HttpStatus, Res } from '@nestjs/common';
import { UrlShortenerService } from './url-shortener.service';
import { ApiResponse } from './response.interface';
import { Response } from 'express';
import { ConfigService } from '@nestjs/config';
@Controller('url-shortener')
export class UrlShortenerController {
constructor(private readonly urlShortenerService: UrlShortenerService) {}
constructor(private readonly urlShortenerService: UrlShortenerService, private configService: ConfigService) {}
@Post('shorten')
async shortenUrl(@Body('url') url: string): Promise<{ shortUrl: string }> {
async shortenUrl(@Body('url') url: string): Promise<ApiResponse> {
if (!url) {
throw new HttpException('URL is required', HttpStatus.BAD_REQUEST);
}
const shortUrl = await this.urlShortenerService.generateShortUrl(url);
return { shortUrl };
try {
const shortUrl = await this.urlShortenerService.generateShortUrl(url);
return { data: shortUrl, status: HttpStatus.CREATED };
} catch (error) {
return { error: error.message, status: HttpStatus.BAD_REQUEST };
}
}
@Get(':shortUrl')
@Redirect()
async resolveShortUrl(@Param('shortUrl') shortUrl: string) {
const originalUrl = this.urlShortenerService.getOriginalUrl(shortUrl);
if (!originalUrl) {
throw new HttpException('URL not found!', HttpStatus.NOT_FOUND);
async resolveShortUrl(@Param('shortUrl') shortUrl: string, @Res() res: Response) {
try {
const originalUrl = this.urlShortenerService.getOriginalUrl(shortUrl);
if (!originalUrl) {
return res.redirect(`${this.configService.get<string>('UI_URL')}/404`);
}
return res.redirect(originalUrl);
} catch (error) {
throw new HttpException('An error occurred', HttpStatus.INTERNAL_SERVER_ERROR);
}
return { url: originalUrl };
}
}

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@ -1,6 +1,7 @@
import { Injectable } from '@nestjs/common';
import * as shortid from 'shortid';
import { DnsService } from '../dns/dns.service';
import { HttpException, HttpStatus } from '@nestjs/common';
@Injectable()
@ -11,19 +12,21 @@ export class UrlShortenerService {
constructor(private readonly dnsService: DnsService) {}
async generateShortUrl(originalUrl: string): Promise<string> {
if(!originalUrl) {
throw new Error('URL is required');
if (!originalUrl) {
throw new HttpException('URL is required', HttpStatus.BAD_REQUEST);
}
let isValid = await this.dnsService.isValidUrl(originalUrl);
if(!isValid) {
throw new Error('URL is invalid');
const isValid = await this.dnsService.isValidUrl(originalUrl);
if (!isValid) {
throw new HttpException('URL is invalid', HttpStatus.BAD_REQUEST);
}
let shortUrl = shortid.generate();
const shortUrl = "tiny." + shortid.generate() + ".com";
this.urlMap.set(shortUrl, originalUrl);
return shortUrl
return shortUrl;
}
getOriginalUrl(shortUrl: string): string | undefined {
return this.urlMap.get(shortUrl);
let url: string | undefined = this.urlMap.get(shortUrl);
if (url) return url;
return undefined;
}
}

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@ -0,0 +1,13 @@
import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
import { INestApplication } from '@nestjs/common';
export function setupSwagger(app: INestApplication): void {
const options = new DocumentBuilder()
.setTitle('Your API Title')
.setDescription('API description')
.setVersion('1.0')
.build();
const document = SwaggerModule.createDocument(app, options);
SwaggerModule.setup('api', app, document);
}