I'm currently building a static website that uses Formspree for my contact form, along with Cloudflare Turnstile for CAPTCHA verification. Even though it was working fine before, I'm now encountering CSP errors that block both services when I try to submit the form. The browser console shows two error messages: one indicates that the Turnstile script isn't included in the script-src directive of my Content Security Policy (CSP), and the other indicates Formspree isn't allowed in the form-action directive.
I've taken several steps to try to resolve the issue, such as adding a CSP meta tag in the HTML head, creating an .htaccess file with CSP headers, and confirming that my Formspree and Cloudflare settings are correct. However, my attempts to override the headers have not been successful.
Here's a brief overview of my current setup: I'm using a static HTML, CSS, and JavaScript site on shared hosting, with the Formspree endpoint shaped like this: https://formspree.io/f/xjgeblwz and the Cloudflare Turnstile site key set up properly.
What I need assistance with is understanding why the CSP headers are still blocking Turnstile and Formspree despite my .htaccess overrides. I suspect the headers might be coming from my hosting provider's settings. Can anyone provide advice on how to effectively remove or override these CSP headers? Also, how can I test if my .htaccess file is working properly? I'm open to any alternative solutions for making Formspree and Turnstile cooperate on my site.
4 Answers
One thing to definitely check is the Network tab in your browser's DevTools. Look for the main document request and view the Response Headers. This will show you the exact CSP header being sent, and will help you determine if it’s coming from your server or somewhere else. Just remember, since Turnstile is rendered in an iframe, you’ll need to add `frame-src https://challenges.cloudflare.com` alongside `script-src` in your CSP.
You're going to need to tweak your CSP headers to explicitly allow both Cloudflare and Formspree. Adding the necessary domains to your CSP directives should fix the blocking. To help with troubleshooting, consider putting your CSP in report-only mode first to see what errors it generates. This way, you can refine your policy without breaking anything.
It sounds like your hosting provider might be enforcing CSP headers before your .htaccess file even gets the chance to intervene. Many shared hosting environments use nginx or a proxy first, so try these steps: 1. Run `curl -I https://yourdomain.com` to see what the current CSP headers are, 2. Reach out to your host to find out if they can modify these headers for you, 3. As a last resort, you can use a meta tag in your HTML to enforce a more restrictive policy, but it won't override existing headers. Also, test whether your .htaccess is working by creating a simple rule and checking if it executes!
First, you might want to check if your server is setting the CSP headers as expected. Use the command `curl -I yourdomain.com` to see if there are any discrepancies. Also, inspecting errors in the browser console or the network tab could help shine a light on the issue. Don't forget, there are some validators online that can check your CSP settings for you.
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