易代下 Clone · EasyDaiXia

A lightweight, self-hostable temporary file hosting service with prepaid permanent traffic quotas.

Inspired by e-daixia.com (易代下).

Features (MVP)

Feature	Status	Notes
User register / login (JWT)	✅	Free 100MB on signup
Permanent traffic balance	✅	Never expires
Upload files	✅	Max 2GB, auto-delete after 48h
Share links /d/{code}	✅	Public info + download
Download deducts traffic	✅	size × 1.0 (configurable)
Card activation	✅	Mock codes: DAI-1G, DAI-5G, DAI-20G...
Auto cleanup expired files	✅	Background every 10 min
Beautiful dark UI	✅	Mobile friendly
Demo account	✅	demo / demo123 with 5GB

Quick Start

cd easy-daixia
pip install -r requirements.txt
uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload

Open http://localhost:8000

Demo login

• Username: demo
• Password: demo123
• Traffic: 5 GB permanent

Activate more traffic

In the dashboard enter:

• DAI-1G → +1 GB
• DAI-5G → +5 GB
• DAI-20G → +20 GB
• DEMO-100M → +100 MB

Architecture

• Backend: FastAPI + SQLAlchemy (async SQLite)
• Storage: Local filesystem (uploads/ or /tmp)
• Auth: JWT (python-jose + passlib/bcrypt)
• Frontend: Single-page vanilla JS + modern CSS (no build step)

Production Roadmap (easy upgrades)

1. Storage: Swap local folder → Cloudflare R2 / S3 / MinIO (very cheap)
2. Payments: Real card system (generate codes after Stripe / Alipay / Taobao webhook)
3. Database: Postgres instead of SQLite
4. Multipliers: Different for free vs premium, or hotlink protection
5. Rate limits + captcha on download
6. Docker + Fly.io / Railway / VPS one-click deploy
7. Chinese UI fully (currently bilingual-ready)
8. Guest traffic pool or anonymous prepaid cards

Why this model works (like e-daixia)

• Users buy cheap traffic packs once → permanent balance
• Files only live 48h → low storage cost
• You only pay for actual downloads
• Perfect for temporary resource sharing, netdisk "代下", or private content drops

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Built as a Grok prototype for Man Ho.
Feel free to fork, improve, deploy.