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89 lines
3.4 KiB
Bash
Executable File
89 lines
3.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Starts a named cloudflared tunnel (stable per-user hostname) + wrangler dev,
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# wiring the stable tunnel hostname into the worker as WORKER_ORIGIN.
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#
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# Unlike a quick tunnel (random *.trycloudflare.com URL each run), the named
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# tunnel always serves at the same hostname, so you register the URL in
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# ChatGPT / other hosted MCP clients once and never touch it again.
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#
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# Usage: ./dev-tunnel.sh
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# Env overrides:
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# MCP_TUNNEL_USER - slug used in the tunnel name/hostname (default: whoami)
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# MCP_TUNNEL_ZONE - DNS zone for the hostname
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# PORT - local worker port (default: 8787)
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set -euo pipefail
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PORT="${PORT:-8787}"
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USER_SLUG="${MCP_TUNNEL_USER:-$(whoami)}"
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ZONE="${MCP_TUNNEL_ZONE:-tldraw.xyz}"
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TUNNEL_NAME="${USER_SLUG}-mcp-app-dev"
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HOSTNAME="${TUNNEL_NAME}.${ZONE}"
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TUNNEL_URL="https://${HOSTNAME}"
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CRED_FILE="$HOME/.cloudflared/${TUNNEL_NAME}.json"
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# 0. Require cloudflared and a one-time login
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if ! command -v cloudflared >/dev/null 2>&1; then
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echo "ERROR: cloudflared is not installed."
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echo "See https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/downloads/"
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exit 1
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fi
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if [ ! -f "$HOME/.cloudflared/cert.pem" ]; then
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echo "You are not logged in to cloudflared. Run this once, then re-run this script:"
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echo " cloudflared tunnel login"
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echo "(choose the ${ZONE} zone when prompted)"
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exit 1
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fi
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# 1. Ensure the tunnel exists and we have local credentials for it.
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# If the tunnel already exists in the account but the local credentials file
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# is gone (e.g. you wiped ~/.cloudflared or switched machines), re-download
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# it with `tunnel token` instead of failing in `tunnel run`.
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if cloudflared tunnel info "$TUNNEL_NAME" >/dev/null 2>&1; then
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if [ ! -f "$CRED_FILE" ]; then
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echo "Restoring credentials for existing tunnel ${TUNNEL_NAME}..."
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cloudflared tunnel token --cred-file "$CRED_FILE" "$TUNNEL_NAME"
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fi
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else
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echo "Creating tunnel ${TUNNEL_NAME}..."
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cloudflared tunnel create --credentials-file "$CRED_FILE" "$TUNNEL_NAME"
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fi
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# 2. Make sure the stable hostname routes to this tunnel. --overwrite-dns makes
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# the specific record win over any *.${ZONE} wildcard and re-points it if the
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# tunnel was ever recreated.
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echo "Ensuring DNS route ${HOSTNAME} -> ${TUNNEL_NAME}..."
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if ! ROUTE_OUT=$(cloudflared tunnel route dns --overwrite-dns "$TUNNEL_NAME" "$HOSTNAME" 2>&1); then
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echo "ERROR: failed to route ${HOSTNAME} to ${TUNNEL_NAME}:"
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echo "$ROUTE_OUT"
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echo "Make sure ${ZONE} is a Cloudflare-hosted zone in your account and you ran 'cloudflared tunnel login'."
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exit 1
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fi
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# Build widget first
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echo "Building widget..."
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yarn build:widget
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# 3. Start cloudflared in the background, forwarding the tunnel to the local worker
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cloudflared tunnel --url "http://localhost:$PORT" run --cred-file "$CRED_FILE" "$TUNNEL_NAME" &
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CF_PID=$!
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cleanup() {
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echo "Stopping cloudflared (pid $CF_PID)..."
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kill "$CF_PID" 2>/dev/null || true
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}
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trap cleanup EXIT
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echo ""
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echo "==================================="
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echo "Stable tunnel URL: $TUNNEL_URL"
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echo "==================================="
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echo ""
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echo "Register this once in ChatGPT / claude_desktop_config.json:"
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echo " \"args\": [\"-y\", \"mcp-remote\", \"$TUNNEL_URL/mcp\"]"
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echo ""
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# 4. Start wrangler with the stable tunnel URL as WORKER_ORIGIN in dev mode.
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# Runs in the foreground; the EXIT trap stops cloudflared when wrangler exits.
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wrangler dev --port "$PORT" --var "WORKER_ORIGIN:$TUNNEL_URL" --var "MCP_IS_DEV:true"
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