Pastebin Demo Application

A simple Pastebin-like application built with FastAPI, 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 SQLAlchemy ORM

⚠️ 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

• Python 3.10 (required for dependency compatibility)
• Node.js (v18 or higher)
• npm (Node Package Manager)

Installation

1. Clone the repository:

git clone [repository-url]
cd python-learn_pastebin

2. Create and activate virtual environment:

# Create virtual environment
python3.10 -m venv venv

# Activate virtual environment
# On macOS/Linux:
source venv/bin/activate
# On Windows:
venv\Scripts\activate

3. Install Python dependencies:

pip install --upgrade pip
pip install -r requirements.txt

4. Install frontend dependencies and build:

cd frontend
npm install
npm run build
cd ..

5. Start the application:

python main.py

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

# Ensure virtual environment is activated
source venv/bin/activate  # On Windows: venv\Scripts\activate

# Run backend (will also serve frontend)
python main.py

The application runs on port 3000 by default.

Troubleshooting

If you encounter issues:

1. Python version issues: Ensure you're using Python 3.8+
2. Installing Python 3.11:
   • macOS: brew install [email protected]
   • Ubuntu: sudo apt install python3.11 python3.11-venv
   • Windows: Download from python.org
3. Module not found errors: Make sure virtual environment is activated and dependencies are installed
4. Port already in use: The app will try to use port 3000
5. 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.