Cloudflare Tunnel to local HTTP creation as a Bash Script

cfTunnel.sh

#!/bin/bash

# Let's ease Cloudflare Tunnel to local HTTP creation
# See also https://developers.cloudflare.com/cloudflare-one/connections/connect-apps/install-and-setup/tunnel-guide/local/

# Check if cloudflared is installed
if ! command -v cloudflared &> /dev/null; then
    echo "'cloudflared' is not installed. Installing it now..."
    brew install cloudflare/cloudflare/cloudflared
else
    echo "'cloudflared' is already installed."
fi

# Ask user if they need to login to Cloudflare
read -p "Do you need to login to Cloudflare? (yes/no): " login_needed
if [ "$login_needed" = "yes" ]; then
    echo "Logging in to Cloudflare..."
    cloudflared tunnel login
fi

# Ask user for the tunnel name
read -p "Enter the name for the new tunnel (this will also be used as the subdomain): " tunnel_name

# Create a new tunnel with the specified name
echo "Creating a new tunnel with name '$tunnel_name'..."
cloudflared tunnel create $tunnel_name

# Store the tunnel ID
tunnel_id=$(cloudflared tunnel list | grep -i ${tunnel_name} | awk '{x=$1}END{print x}')

# Ask user for the domain
read -p "Enter your domain (excluding subdomain): " domain_name

# Validate the domain name has at least one dot and does not start or end with a dot
if [[ $domain_name != *.* ]] || [[ $domain_name == .* ]] || [[ $domain_name == *.*. ]]; then
    echo "Invalid domain name. Please include a top-level domain (e.g., 'yourdomain.com', not just 'yourdomain')."
    exit 1
fi

# Concatenate the tunnel_name and the domain_name to create the full_domain
full_domain="$tunnel_name.$domain_name"

# Configure the tunnel to route traffic
echo "Configuring tunnel to route traffic from $full_domain ..."
cloudflared tunnel route dns $tunnel_name $full_domain

# Ask user for the local service URL
read -p "Enter the local service URL (localhost:port): " local_url

tunnel_yml="$HOME/.cloudflared/$tunnel_name.yml"

# Create a configuration file for the tunnel to specify the local service URL
cat << EOF > $tunnel_yml
url: $local_url
tunnel: $tunnel_id
credentials-file: $HOME/.cloudflared/$tunnel_id.json
EOF

# Run the tunnel
echo "Running the tunnel..."
cloudflared tunnel --config $tunnel_yml run