upload-GLTF

A secure web interface for uploading 3D assets (GLTF/GLB + textures) with automatic Draco compression and GitHub push. Built for La Fabrik Durable.

Stack

• Next.js 16 (App Router) + React 19 + TypeScript
• Three.js (@react-three/fiber + @react-three/drei) for 3D preview
• Tailwind CSS for styling
• Octokit for pushing via the GitHub API
• Blender (headless) for Draco mesh compression
• Coolify (Docker) for hosting

Installation

git clone https://github.com/La-Fabrik-Durable/upload-GLTF.git
cd upload-GLTF
npm install

Configuration

Copy .env.example to .env.local and fill in the values:

UPLOAD_SECRET_KEY=your-secret-key-here
GITHUB_TOKEN=ghp_your-github-personal-access-token
GIT_BRANCH=main
GIT_REPO_URL=https://github.com/your-org/your-repo.git
BLENDER_PATH=/Applications/Blender.app/Contents/MacOS/Blender

Variable	Description	Required
UPLOAD_SECRET_KEY	Secret key for upload authentication	Yes
GITHUB_TOKEN	GitHub Personal Access Token (fine-grained, Contents: Read and write)	Yes
GIT_BRANCH	Target branch (default: main)	No
GIT_REPO_URL	Target GitHub repository URL	Yes
BLENDER_PATH	Path to Blender binary (default: blender)	No

To create a token: GitHub > Settings > Developer settings > Fine-grained personal access tokens > select the target repo > Permissions > Contents: Read and write.

Usage

Development

npm run dev

Access the app at http://localhost:3000

Note: Draco compression requires Blender installed locally. On macOS, Blender is typically at /Applications/Blender.app/Contents/MacOS/Blender. Set BLENDER_PATH in .env.local accordingly. If Blender is not available, models are pushed to GitHub without compression.

Production (Coolify / Docker)

docker build -t upload-gltf .
docker run -p 3000:3000 \
  -e UPLOAD_SECRET_KEY=your-key \
  -e GITHUB_TOKEN=ghp_xxx \
  -e GIT_REPO_URL=https://github.com/org/repo.git \
  upload-gltf

The Dockerfile includes Blender headless for automatic Draco compression.

How it works

1. The user enters their access key
2. They pick a destination (farm, map, powergrid, workshop, general, environment)
3. They select a folder containing:
   • model.glb or model.gltf (required)
   • Textures: roughness, normal, metalness, color, displace (.png/.jpg/.webp, optional)
4. The model is displayed in a 3D preview
5. On clicking "Envoyer sur GitHub":
   • The app checks if the folder already exists on the remote repo
   • If it exists, a confirmation dialog is shown listing the existing files that will be replaced
   • On confirmation (or if the folder is new), all files are sent to the /api/upload endpoint
6. For models: the file is written to /tmp, compressed with Blender Draco, then the compressed version is pushed
7. For textures: pushed directly without compression
8. All files are pushed in a single commit with a formatted message:

   update: upload-gltf add a new model -> farm/my-model
   
   📦 Model
     ✅ model.gltf (compressed)
   🎨 Textures
     ✅ color.jpg
     ❌ metalness (manquant)
   

9. If the folder already existed, orphan files (present in the old version but not in the new upload) are deleted in the same commit
10. If Blender is unavailable, the original model is pushed as-is (graceful fallback)

Destinations

Uploaded models are pushed to public/models/<destination>/<folderName>/ in the target repo:

Destination	Path
Farm	public/models/farm/
Map	public/models/map/
Powergrid	public/models/powergrid/
Workshop	public/models/workshop/
General	public/models/general/
Environment	public/models/environment/

Project Structure

app/
├── api/upload/route.ts    # API: GET (check existence) + POST (compress + push)
├── globals.css            # Tailwind + Google Fonts
├── layout.tsx             # Root layout
└── page.tsx               # Home page
components/
├── UploadZone.tsx         # UI: key input, destination picker, folder picker, validation, overwrite confirmation, upload
├── ModelViewer.tsx         # Lazy wrapper for the 3D viewer
└── SceneViewer.tsx         # Three.js Canvas
scripts/
└── compress.py            # Blender Draco compression script

Supported Formats

Type	Extensions
3D Models	.glb, .gltf
Textures	.png, .jpg, .jpeg, .webp

License

MIT