You can't magically make bridging to insecure services work in a secure way. If you want to use Tor to bridge to unencrypted HTTP, at some point someone needs t

You can't magically make bridging to insecure services work in a secure way. If you want to use Tor to bridge to unencrypted HTTP, at some point someone needs to actually make an unencrypted HTTP request. And likewise for HTTPS requests. HTTP is a stateless protocol, which is why what you're describing is not possible. You could design a protocol that let you split up requests in the manner you describe, but that protocol would not be HTTP.