Initial code for password change in python flask

python-flask/smeserver-password-app/README.md

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+# SME Server Password Change Application - Python 3.6.8 Compatible
+
+## Overview
+A Python Flask web application specifically updated for compatibility with Python 3.6.8 and Flask 2.0.3, implementing a password change interface for SME Server systems.
+
+## Compatibility
+- ✅ **Python 3.6.8** - Fully tested and compatible
+- ✅ **Flask 2.0.3** - Compatible version
+- ✅ **Werkzeug 2.0.3** - Compatible version
+- ✅ **Flask-CORS 3.0.10** - Compatible version
+
+## Key Changes for Python 3.6.8
+- Removed f-string formatting (replaced with .format())
+- Updated type hints for Python 3.6 compatibility
+- Compatible Flask and dependency versions
+- Tested string formatting methods
+
+## Requirements
+```
+Flask==2.0.3
+Flask-CORS==3.0.10
+Werkzeug==2.0.3
+```
+
+## Features
+- Web interface matching the original SME Server design
+- Integration with SME Server configuration database
+- Password strength validation
+- Current password verification
+- Uses `signal-event password-update` for proper password updates
+- Responsive design for mobile and desktop
+- Error handling and security measures
+- Demo mode for testing
+
+## Quick Installation
+1. Extract the application files to your SME Server
+2. Run the installation script:
+   ```bash
+   sudo ./install.sh
+   ```
+3. Access the application at `http://your-server:5000`
+
+## Manual Installation
+If you prefer manual installation:
+
+1. Install dependencies:
+   ```bash
+   pip3 install Flask==2.0.3 Flask-CORS==3.0.10 Werkzeug==2.0.3
+   ```
+
+2. Copy files to `/opt/smeserver-password-app/`
+
+3. Create and start the systemd service (see install.sh for details)
+
+## Testing
+Use the demo mode for testing:
+```bash
+python3 demo_mode.py
+```
+
+Demo users:
+- Username: `testuser`, Password: `oldpassword123`
+- Username: `admin`, Password: `adminpass456`
+- Username: `john`, Password: `johnpass789`
+
+## File Structure
+```
+smeserver-password-app-py36/
+├── app.py                    # Main Flask application (Python 3.6.8 compatible)
+├── smeserver_utils.py        # SME Server utilities (Python 3.6.8 compatible)
+├── demo_mode.py             # Demo version (Python 3.6.8 compatible)
+├── requirements.txt         # Python 3.6.8 compatible dependencies
+├── install.sh              # Installation script with version checks
+├── templates/
+│   └── password_change.html # Web interface template
+├── static/
+│   └── css/
+│       └── style.css       # Styling
+└── README.md               # This file
+```
+
+## Differences from Original Version
+- String formatting changed from f-strings to .format() method
+- Type hints updated for Python 3.6 compatibility
+- Dependency versions locked to Python 3.6.8 compatible versions
+- Installation script includes Python version detection
+
+## Troubleshooting
+If you encounter issues:
+1. Verify Python version: `python3 --version`
+2. Check Flask version: `flask --version`
+3. Review service logs: `journalctl -u smeserver-password-web -f`
+4. Test with demo mode first
+
+## Support
+This version is specifically designed for SME Server systems running Python 3.6.8 with Flask 2.0.3.
+