php - How to redirect https to http without any SSL Certificate

Question

Is difficult to explain what I am seekig here.

I have a website that doesn't have SSL Certificates and I am using a page as a landing page for a Facebook Application.

My Problem is when someone is on a secure connection on facebook (https://) the iframe src is pointed to the same https URL of my landing page. this returns an error like this.

SSL connection error

Unable to make a secure connection to the server. This may be a problem with the server, or it may be requiring a client authentication certificate that you don't have.

Error 107 (net::ERR_SSL_PROTOCOL_ERROR): SSL protocol error.

How do I may users redirect to http or any workaround without installing SSL Certificates?

Answer 1

There is really no way to do that: HTTPS relies on the SSL certificate being present and the SSL negotiation ocurring BEFORE any data is sent to the server. Therefore if there is no SSL cert then it won't even get to the point where you can send a redirect (as you are observing).

I'd suggest just buying the cheapest cert you can: GoDaddy has specials for $12.99 that I've used quite effectively for just this purpose (Facebook app SSL pages) and that you can have bought and ready in 15 minutes.

EDIT: Just use Lets Encrypt, as @xbakesx states in his comment. Completely free, no delay, accepted pretty much everywhere.