Add support for FlareSolverr to bypass Cloudflare

[Apocalypsor]

• [x ] I have read this document: https://miniflux.app/opinionated.html#feature-request

FlareSolverr is a very good tool to bypass Cloudflare and return cookies, Miniflux can use the cookies for requests.

https://github.com/FlareSolverr/FlareSolverr

[jvoisin]

Isn't the Disable HTTP/2 to avoid fingerprinting preference enough? It bypassed clownflare for every feed that needed a workaround for me.

Also, it would be more productive to reach out to the website admin to ask them to fix this, instead of trying to bypass it.

[helmut72]

Doesn't work for newalbumreleases .net

[juju4]

It would be interesting to have a tag/checkbox that automatically fetch feed through this specific pseudo-proxy (as not an HTTP proxy without extra) vs default fetch (direct or global proxy). Or based on some response headers like "server: cloudflare" or "server: esf" Or as fallback mechanism, fail first, try adding a browser agent, next try another flaresolverr/proxy and more eventually. For now using workaround as show on FreshRSS https://github.com/FreshRSS/FreshRSS/discussions/7229