Cloudflare Tunnel with QR Code

tqr.sh

#!/bin/bash

# Default values
PORT=3000
PROTOCOL="http"
HOST="localhost"
ADDITIONAL_PARAMS=""

# Function to display usage
show_help() {
	echo "Usage: $(basename $0) [OPTIONS]"
	echo "Generate a QR code for Cloudflare tunnel URL"
	echo
	echo "Options:"
	echo "  -p, --port PORT        Port number (default: 3000)"
	echo "  -P, --protocol PROTO   Protocol (http/https) (default: http)"
	echo "  -H, --host HOST        Host (default: localhost)"
	echo "  -a, --params PARAMS    Additional cloudflared parameters"
	echo "  -h, --help            Show this help message"
}

# Parse command line arguments
while [[ $# -gt 0 ]]; do
	case $1 in
	-p | --port)
		PORT="$2"
		shift 2
		;;
	-P | --protocol)
		PROTOCOL="$2"
		shift 2
		;;
	-H | --host)
		HOST="$2"
		shift 2
		;;
	-a | --params)
		ADDITIONAL_PARAMS="$2"
		shift 2
		;;
	-h | --help)
		show_help
		exit 0
		;;
	*)
		echo "Unknown option: $1"
		show_help
		exit 1
		;;
	esac
done

# Check if required commands exist
check_dependencies() {
	local missing_deps=()

	if ! command -v cloudflared >/dev/null 2>&1; then
		missing_deps+=("cloudflared")
	fi

	if ! command -v qrencode >/dev/null 2>&1; then
		missing_deps+=("qrencode")
	fi

	if [ ${#missing_deps[@]} -ne 0 ]; then
		echo "Error: Missing required dependencies:"
		for dep in "${missing_deps[@]}"; do
			echo "  - $dep"
		done

		echo -e "\nInstall missing dependencies with:"
		echo "brew install cloudflare/cloudflare/cloudflared qrencode"
		exit 1
	fi
}

# Main execution
check_dependencies

# Create a named pipe for URL monitoring
URL_PIPE=$(mktemp -u)
mkfifo "$URL_PIPE"

# Cleanup function
cleanup() {
	rm -f "$URL_PIPE"
	kill $(jobs -p) 2>/dev/null
}
trap cleanup EXIT

# Run cloudflared and monitor its output in a subshell
(script -q /dev/null cloudflared tunnel --url "$PROTOCOL://$HOST:$PORT" $ADDITIONAL_PARAMS 2>&1 | tee "$URL_PIPE") &

# Process the output to generate QR code
while IFS= read -r line; do
	if [[ $line == *"Your quick Tunnel has been created!"* ]]; then
		# Read next line
		read -r url_line
		url=$(echo "$url_line" | grep -o 'https://[a-zA-Z0-9.-]*\.trycloudflare\.com')
		if [ ! -z "$url" ]; then
			printf "\nTunnel URL: %s\n" "$url"
			printf "\nScan this QR code:\n"
			qrencode -t UTF8 "$url"
			printf "\n"
		fi
	fi
done <"$URL_PIPE" &

# Wait for background processes
wait