fwserve 1.0.4

FastAPI firmware file server with upload UI and syslog receiver

FWServe

A FastAPI-based firmware file server that automatically serves .bin files from a configured directory, with a web upload UI and integrated syslog receiver.

Features

• Automatic detection of new .bin files
• RESTful API for listing and downloading files
• Web UI for uploading .bin files
• Integrated syslog server (UDP + TCP)
• Real-time syslog viewer with filtering
• CLI for easy installation as a systemd service
• Runs as a Linux systemd service with dedicated user

Installation

From PyPI (Recommended)

# Install using pipx (recommended for CLI tools)
pipx install fwserve

# Or install using pip
pip install fwserve

From Source

# Clone the repository
git clone https://github.com/liptonj/workflows2025.git
cd workflows2025/fwserve

# Install with pip
pip install .

# Or install with development dependencies
pip install -e ".[dev]"

Quick Start

Run in Development Mode

# Run with default settings (port 8080, current directory)
fwserve run

# Run with custom settings
fwserve run --port 8080 --directory /path/to/files --reload

Install as a Production Service (Linux)

The install command sets up everything needed to run fwserve as a systemd service:

1. Creates a dedicated fwserve user and group
2. Creates /opt/fwserve directory structure
3. Creates a Python virtual environment with fwserve installed
4. Installs and configures the systemd service

# Install with default settings (requires root)
# Uses port 80 for HTTP and port 514 for syslog (standard syslog port)
sudo ~/.local/bin/fwserve install

# Install with custom settings
sudo ~/.local/bin/fwserve install --port 8080 --syslog-port 1514

# Start the service
sudo systemctl start fwserve

# Enable on boot
sudo systemctl enable fwserve

# Check service status
fwserve status

Upgrading

To upgrade an existing installation:

# Upgrade the CLI tool
pipx upgrade fwserve

# Reinstall the service (preserves data in files/ and logs/)
sudo ~/.local/bin/fwserve install --force

# Restart the service
sudo systemctl restart fwserve

Uninstalling

# Uninstall the systemd service
sudo fwserve uninstall

# Optionally remove the data directory
sudo rm -rf /opt/fwserve

Directory Structure After Install

/opt/fwserve/
├── venv/           # Python virtual environment with fwserve
├── files/          # Directory for .bin files (served/uploaded)
└── logs/
    └── syslog.log  # Persisted syslog messages

API Endpoints

Endpoint	Method	Description
/	GET	Landing page with links to all features
/health	GET	Health check
/files	GET	List available .bin files
/files/{filename}	GET	Download a specific file
/upload	GET	Upload form UI
/upload	POST	Upload a .bin file
/syslog	GET	Real-time syslog viewer UI
/syslog/history	GET	Get recent syslog entries
/syslog/stream	GET	SSE stream of syslog entries

CLI Commands

# Show help
fwserve --help

# Run the server (development)
fwserve run --host 0.0.0.0 --port 8080 --directory ./files

# Install as systemd service (requires root)
sudo fwserve install --port 80 --syslog-port 1514

# Check service status
fwserve status

# Uninstall service (requires root)
sudo fwserve uninstall

Install Command Options

Option	Default	Description
--install-dir	/opt/fwserve	Installation directory
--user	fwserve	Service user
--group	fwserve	Service group
--port	80	HTTP port
--syslog-port	514	Syslog UDP/TCP port (standard)
--no-service	false	Skip systemd service installation
--force	false	Force reinstall without prompts

Configuration

Configuration is done via environment variables (set in the systemd service file):

Server Settings

Variable	Default	Description
FWSERVE_HOST	0.0.0.0	Host to bind to
FWSERVE_PORT	8080	HTTP port to listen on
FWSERVE_DIRECTORY	.	Directory to serve files from
FWSERVE_LOG_LEVEL	INFO	Logging level
FWSERVE_TIMEZONE	America/New_York	Timezone for timestamps

Upload Settings

Variable	Default	Description
FWSERVE_UPLOAD_MAX_BYTES	104857600	Maximum upload size (100MB)

Syslog Settings

Variable	Default	Description
SYSLOG_ENABLE_UDP	true	Enable UDP syslog listener
SYSLOG_ENABLE_TCP	true	Enable TCP syslog listener
SYSLOG_UDP_PORT	514	UDP port for syslog
SYSLOG_TCP_PORT	514	TCP port for syslog
SYSLOG_LOG_FILE	<directory>/syslog.log	Path to syslog storage file
SYSLOG_TAIL_SIZE	5000	Number of entries to keep in memory
SYSLOG_HISTORY_LIMIT	500	Max entries returned by history endpoint

Usage Examples

List available files

curl http://localhost/files

Response:

{
  "files": ["firmware_v1.0.bin", "update_v2.1.bin"]
}

Download a file

curl -O http://localhost/files/firmware_v1.0.bin

Upload a file

curl -X POST -F "file=@firmware.bin" http://localhost/upload

Send syslog messages

# UDP
echo "<14>Test message from host1" | nc -u localhost 514

# TCP
echo "<14>Test message from host1" | nc localhost 514

View syslog messages

Open http://localhost/syslog in a browser for the real-time viewer, or use the API:

# Get all entries
curl http://localhost/syslog/history

# Filter by host
curl "http://localhost/syslog/history?host=router1"

# Filter by severity and message
curl "http://localhost/syslog/history?severity=err&q=failed"

Service Management

After installing with fwserve install:

# Start service
sudo systemctl start fwserve

# Stop service
sudo systemctl stop fwserve

# Restart service
sudo systemctl restart fwserve

# View status
sudo systemctl status fwserve

# View logs
sudo journalctl -u fwserve -f

Migration from Legacy Installation

If you previously installed using the old install.sh script, running fwserve install will:

1. Detect the legacy installation
2. Prompt for migration (or use --force to skip)
3. Remove old Python files (main.py, config.py, etc.)
4. Preserve your data directories (files/ and logs/)
5. Install the new venv-based setup

Security Notes

• Only .bin files are served/uploaded
• Path traversal attacks are blocked
• Service runs as dedicated non-root user (fwserve)
• Systemd security hardening is enabled (ProtectSystem, PrivateTmp, etc.)
• Files directory has restricted write access

Troubleshooting

Service fails to start

Check the logs:

sudo journalctl -u fwserve -n 50

Permission denied errors

Ensure the fwserve user owns the directories:

sudo chown -R fwserve:fwserve /opt/fwserve/files /opt/fwserve/logs

Port already in use

Check what's using the port:

sudo ss -tlnp | grep :80

Development

# Install dev dependencies
pip install -e ".[dev]"

# Run tests
pytest tests/ -v

# Run type checking
mypy src/fwserve/

# Run linter
ruff check src/

# Format code
ruff format src/

License

MIT