datasette-turnstile 0.1a1

Integrate CAPTCHAs powered by Cloudflare Turnstile

datasette-turnstile

Protect Datasette paths with Cloudflare Turnstile challenges.

Installation

Install this plugin in the same environment as Datasette.

datasette install datasette-turnstile

Configuration

Configure the plugin in your datasette.yaml:

plugins:
  datasette-turnstile:
    site_key: "0x4AAAAAAxxxxxxxxxxxxxxx"
    secret_key:
      $env: TURNSTILE_SECRET_KEY
    protected_paths:
      - "/admin/*"
      - "/-/import-*"
    exclude_patterns:
      - "*.json"
    cookie_max_age: 86400

Configuration options

• site_key (required): Your Turnstile site key from the Cloudflare dashboard
• secret_key (required): Your Turnstile secret key (supports $env syntax)
• protected_paths (required): List of URL patterns to protect
• exclude_patterns (optional): Patterns to exclude from protection (e.g., *.json)
• cookie_max_age (optional): Cookie lifetime in seconds (default: 86400 = 24 hours)
• cookie_name (optional): Name of the verification cookie (default: ds_turnstile)

URL Pattern Matching

Patterns use simple wildcard matching where * matches any characters:

• /admin/* - Protects all paths under /admin/
• /-/import-* - Protects /-/import-csv, /-/import-json, etc.
• /data?*&*&* - Protects /data with 2+ query string parameters

Use ? in patterns to match against the full URL including query string. Without ?, patterns only match the path.

How It Works

1. When a user visits a protected path, they're redirected to /-/turnstile
2. The challenge page displays a Cloudflare Turnstile widget
3. Upon completing the challenge, the token is verified server-side
4. On success, a signed cookie is set and the user is redirected to their original destination
5. The cookie remains valid for 24 hours (configurable)

API Requests

For requests with Accept: application/json header, the plugin returns a 403 JSON response instead of redirecting:

{"error": "turnstile_required"}

Use exclude_patterns: ["*.json"] to exclude JSON endpoints from protection entirely.

Development

To set up this plugin locally, first checkout the code:

cd datasette-turnstile

To run the tests:

uv run pytest

Create a config file using Turnstile test keys:

cat > datasette.yaml << 'EOF'
plugins:
  datasette-turnstile:
    site_key: "1x00000000000000000000AA"
    secret_key:
      $env: TURNSTILE_SECRET_KEY
    protected_paths:
      - "/demo/example*
EOF

Create an example database:

sqlite3 demo.db "CREATE TABLE example (id INTEGER PRIMARY KEY, name TEXT);"

Put the secret in an environment variable and run Datasette with the plugin:

TURNSTILE_SECRET_KEY='1x0000000000000000000000000000000AA' uv run datasette -c datasette.yaml demo.db