sber-tunnel 1.0.2

File synchronization service using Confluence API

Sber-tunnel

File synchronization service using Confluence API as a storage backend.

Features

• Synchronize directories between multiple devices using Confluence
• Automatic file change detection and syncing
• Support for large files (>100MB) with automatic chunking
• Web UI for managing synchronized directories
• CLI interface for easy operation
• Conflict resolution using last-write-wins strategy

Installation

Using pip

pip install -e .

From requirements

pip install -r requirements.txt

Usage

Initialize configuration

sber-tunnel init

This will prompt you for:

• Confluence base URL
• Username
• Password (or API token)
• Page ID for storing files
• Optional: p12 certificate for secure connections

Add directory to sync

sber-tunnel add /path/to/directory

Start sync service

sber-tunnel start

This will start:

• File watcher for automatic change detection
• Web UI at http://127.0.0.1:8000
• Background sync service

Manual sync

sber-tunnel sync

Check status

sber-tunnel status

Stop service

sber-tunnel stop

Architecture

Components

1. CLI - Command-line interface built with Click
2. FastAPI Server - Web API and UI
3. Confluence Service - Handles file upload/download and chunking
4. Sync Service - Manages synchronization logic
5. File Watcher - Monitors directory changes
6. SQLite Database - Local state management

Data Model

manifest.json stored in Confluence contains:

• List of files with path, size, mtime, sha256, version
• Chunk information for large files
• Deletion markers

Local SQLite database contains:

• files - File metadata and hashes
• dirs - Tracked directories
• ops - Pending operations queue
• config - Configuration values

File Handling

• Files ≤100MB: Uploaded as single chunk
• Files >100MB: Split into 100MB chunks
• Each chunk verified with SHA256 checksum
• Final file verified after reassembly

Synchronization Strategy

1. Download manifest from Confluence
2. Scan local directory
3. Compare local vs remote state
4. Upload changed/new files
5. Download remote changes
6. Use last-write-wins for conflicts
7. Upload updated manifest

Configuration

Configuration is stored in .sber-tunnel/config.json in the directory where you run sber-tunnel

Database is stored in .sber-tunnel/sber-tunnel.db in the same directory

Note: The .sber-tunnel/ directory is created in your current working directory, not in your home directory. This allows you to have different configurations for different projects.

Security

• Credentials stored locally (consider using environment variables in production)
• Full support for p12 certificates - Automatically extracts and uses PEM format
• SHA256 checksums for file integrity
• Hidden and temporary files excluded from sync
• Temporary certificate files with restrictive permissions (600)
• Automatic cleanup of temporary files

Certificate Support

Sber-tunnel fully supports p12 (PKCS#12) certificates for secure authentication:

sber-tunnel init
# When prompted, provide:
# - Path to p12 certificate
# - Certificate password

The service automatically:

• Extracts certificate and private key from p12
• Creates temporary PEM files for use with Confluence API
• Manages file permissions securely
• Cleans up temporary files on shutdown

See docs/CERTIFICATES.md for detailed certificate documentation.

Limitations

• Maximum chunk size: 100MB
• Uses last-write-wins for conflict resolution
• No support for symbolic links
• Hidden files and directories are excluded

Development

Project Structure

sber-tunnel/
├── sber_tunnel/
│   ├── api/          # FastAPI server
│   ├── cli/          # CLI commands
│   ├── core/         # Configuration
│   ├── db/           # Database schema
│   ├── models/       # Data models
│   └── services/     # Business logic
├── tests/            # Unit tests
├── docs/             # Documentation
├── requirements.txt
└── setup.py

Running tests

pytest tests/

License

MIT License