mirror of
https://github.com/supabase/supabase.git
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Katerina Skroumpelou
a0b946f1a2
<!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Documentation** * Updated Edge Functions CORS header guides with version-specific approaches for SDK v2.95.0+ and earlier versions. * Revised code examples across multiple Edge Functions to reflect current CORS header implementation patterns. * Enhanced troubleshooting documentation with updated preflight handling guidance. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
82 lines
2.4 KiB
Plaintext
82 lines
2.4 KiB
Plaintext
---
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id: 'examples-cloudflare-turnstile'
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title: 'CAPTCHA support with Cloudflare Turnstile'
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description: 'Protecting Forms with Cloudflare Turnstile.'
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tocVideo: 'OwW0znboh60'
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---
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[Cloudflare Turnstile](https://www.cloudflare.com/application-services/products/turnstile/) is a friendly, free CAPTCHA replacement, and it works seamlessly with Supabase Edge Functions to protect your forms. [View on GitHub](https://github.com/supabase/supabase/tree/master/examples/edge-functions/supabase/functions/cloudflare-turnstile).
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## Setup
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- Follow these steps to set up a new site: https://developers.cloudflare.com/turnstile/get-started/
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- Add the Cloudflare Turnstile widget to your site: https://developers.cloudflare.com/turnstile/get-started/client-side-rendering/
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## Code
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Create a new function in your project:
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```bash
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supabase functions new cloudflare-turnstile
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```
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And add the code to the `index.ts` file:
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```ts index.ts
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import { corsHeaders } from '@supabase/supabase-js/cors' // v2.95.0+
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console.log('Hello from Cloudflare Trunstile!')
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function ips(req: Request) {
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return req.headers.get('x-forwarded-for')?.split(/\s*,\s*/)
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}
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Deno.serve(async (req) => {
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// This is needed if you're planning to invoke your function from a browser.
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if (req.method === 'OPTIONS') {
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return new Response('ok', { headers: corsHeaders })
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}
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const { token } = await req.json()
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const clientIps = ips(req) || ['']
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const ip = clientIps[0]
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// Validate the token by calling the
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// "/siteverify" API endpoint.
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let formData = new FormData()
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formData.append('secret', Deno.env.get('CLOUDFLARE_SECRET_KEY') ?? '')
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formData.append('response', token)
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formData.append('remoteip', ip)
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const url = 'https://challenges.cloudflare.com/turnstile/v0/siteverify'
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const result = await fetch(url, {
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body: formData,
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method: 'POST',
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})
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const outcome = await result.json()
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console.log(outcome)
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if (outcome.success) {
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return new Response('success', { headers: corsHeaders })
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}
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return new Response('failure', { headers: corsHeaders })
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})
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```
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## Deploy the server-side validation Edge Functions
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- https://developers.cloudflare.com/turnstile/get-started/server-side-validation/
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```bash
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supabase functions deploy cloudflare-turnstile
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supabase secrets set CLOUDFLARE_SECRET_KEY=your_secret_key
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```
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## Invoke the function from your site
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```js
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const { data, error } = await supabase.functions.invoke('cloudflare-turnstile', {
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body: { token },
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})
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```
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