Pastebin Clone

A REST API for storing and retrieving text snippets with a TTL. Built as a system design study project.

Stack

• FastAPI — HTTP API
• PostgreSQL — persistent storage
• Redis — TTL-aware cache
• SQLModel — ORM + validation

Endpoints

Method	Path	Description
POST	/pastes/	Create a paste
GET	/pastes/{code}	Retrieve a paste

POST /pastes/

{
  "input": "print('hello world')",
  "language": "python",
  "ttl": 3600
}

Returns the created paste with a short code and expiration_time.

GET /pastes/{code}

Returns the paste if still valid. Returns 410 Gone if expired.

Setup

Prerequisites: Python 3.11+, PostgreSQL, Redis

pip install -r requirements.txt

fastapi dev app/main.py

Architecture

See docs/ARCHITECTURE.md.