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Pastebin Demo Application

A simple Pastebin-like application built with Spring Boot, React, TypeScript. This application is intentionally built with minimal security measures for educational purposes in security courses.

Features

  • Code snippet creation and editing
  • Support for multiple programming languages:
    • TypeScript
    • JavaScript
    • Python
    • Java
    • C++
  • Syntax highlighting using CodeMirror
  • File upload functionality
  • Basic user authentication
  • Unique URLs for each saved snippet
  • SQLite database with Hibernate/JPA

⚠️ Security Notice

This application is deliberately built WITHOUT security measures for educational purposes. It contains various vulnerabilities including but not limited to:

  • SQL Injection possibilities
  • No input validation
  • Weak authentication
  • No CSRF protection
  • Potential XSS vulnerabilities

DO NOT USE THIS IN PRODUCTION!

Prerequisites

  • Java 17 (JDK)
  • Maven 3.9+
  • Node.js (v18 or higher)
  • npm (Node Package Manager)

Installation

  1. Build the frontend:
cd frontend
npm install
npm run build
cd ..
  1. Start the application (backend):
cd backend
mvn spring-boot:run

Usage

  1. Access the application at http://localhost:3000

  2. Login with default credentials:

    • Username: admin
    • Password: codesignal

  3. Create new snippets:

    • Enter a title
    • Select a programming language
    • Write or paste your code
    • Click "Save" to generate a unique URL

  4. Upload files:

    • Click the file upload button
    • Select a text file
    • The content will be automatically loaded into the editor

  5. Access saved snippets:

    • Use the generated URL (format: /snippet/:id)
    • Edit and save changes as needed

Development

Running in Development Mode

# Build frontend
cd frontend && npm install && npm run build && cd ..

# Run backend (will serve the built frontend)
cd backend && mvn spring-boot:run

The application runs on port 3000 by default.

Troubleshooting

If you encounter issues:

  1. Java version issues: Ensure you're using JDK 17 and Maven 3.9+
  2. Frontend build: Rebuild if UI isn’t loading: cd frontend && npm run build
  3. Port already in use: The app will try to use port 3000
  4. Database issues: Delete database.sqlite file and restart

API Endpoints

  • POST /api/auth/login - User authentication
  • POST /api/auth/register - User registration
  • POST /api/snippets - Create/update snippets
  • GET /api/snippets/{id} - Retrieve a specific snippet

Contributing

This is a demo application for educational purposes. If you find any bugs or want to suggest improvements, please open an issue or submit a pull request.