# Sharey B2 Migration Summary

## What Changed

Your Sharey application has been successfully modified to use Backblaze B2 cloud storage instead of local file storage. Here are the key changes:

### 🔄 Core Changes

1. **Storage Backend**: 
   - Removed local file storage (`uploads/` and `pastes/` folders)
   - Added Backblaze B2 cloud storage integration
   - Files and pastes now stored in B2 bucket

2. **Dependencies Added**:
   - `b2sdk`: Official Backblaze B2 SDK
   - `python-dotenv`: Environment variable management

3. **Configuration**:
   - Added `.env` file support for B2 credentials
   - Added connection validation and error handling
   - Added health check endpoint

### 📁 New Files Created

- `requirements.txt` - Python dependencies
- `.env.example` - Environment template
- `setup.py` - Automated setup script (Python-based)
- `test_b2.py` - B2 connection testing utility
- `DEPLOYMENT.md` - Production deployment guide
- Updated `.gitignore` - Improved git ignore rules
- Updated `README.md` - Comprehensive setup instructions

### 🔧 Modified Functions

1. **File Upload** (`/api/upload`):
   - Now uploads files directly to B2 bucket under `files/` prefix
   - Returns B2 direct download URLs
   - Better error handling

2. **File Serving** (`/files/<file_id>`):
   - Now redirects to B2 download URLs
   - No longer serves files locally

3. **Paste Creation** (`/api/paste`):
   - Stores paste content in B2 under `pastes/` prefix
   - UTF-8 encoding support

4. **Paste Viewing** (`/pastes/<paste_id>` and `/pastes/raw/<paste_id>`):
   - Downloads paste content from B2
   - Maintains same user interface

### 🏗️ Bucket Organization

Your B2 bucket will be organized as:
```
your-bucket/
├── files/          # Uploaded files (images, documents, etc.)
│   ├── abc123.jpg
│   ├── def456.pdf
│   └── ...
└── pastes/         # Text pastes
    ├── ghi789.txt
    ├── jkl012.txt
    └── ...
```

## Next Steps

1. **Get B2 Credentials**:
   - Sign up at [Backblaze B2](https://www.backblaze.com/b2)
   - Create application key and bucket
   - Note down: Key ID, Application Key, Bucket Name

2. **Configure Environment**:
   ```bash
   cp .env.example .env
   # Edit .env with your B2 credentials
   ```

3. **Install Dependencies**:
   ```bash
   python setup.py  # or manually: pip install -r requirements.txt
   ```

4. **Test Configuration**:
   ```bash
   python test_b2.py
   ```

5. **Run Application**:
   ```bash
   python app.py
   ```

## Benefits of B2 Storage

- ✅ **Scalable**: No local disk space limitations
- ✅ **Reliable**: Built-in redundancy and backups
- ✅ **Cost-effective**: Pay only for what you use
- ✅ **Global CDN**: Fast downloads worldwide
- ✅ **Secure**: Encrypted storage with access controls
- ✅ **Maintenance-free**: No local file management needed

## Migration Notes

- Existing local files/pastes will remain in local folders
- New uploads will go to B2
- Old URLs will break (files are now served from B2)
- No data migration script provided (manual migration needed if desired)
- B2 bucket should be set to "Public" for file sharing to work properly

## Support

If you encounter issues:
1. Run `python test_b2.py` to test your configuration
2. Check the health endpoint: `http://localhost:8866/health`
3. Verify B2 bucket permissions and settings
4. Ensure your .env file has correct credentials
