Add support for HTTP/2 (requests says: 426 Client Error)

[mar-svo]

When HTTP/2 is forced, than this error returned:
426 Client Error: for url: https://www.mza.cz/actapublica/aktuality

[thp]

When you say "HTTP/2 is forced", do you mean on the client side or on the server side? Do you have a full log of the error message you get?

[mar-svo]

When you say "HTTP/2 is forced", do you mean on the client side or on the server side? Do you have a full log of the error message you get?

HTTP/2 is forced on server-side (https://www.mza.cz/)

[thp]

Need to add support for this, the library we're using (requests) doesn't support it and won't get support for it:

psf/requests#5757 (comment)

As a workaround (untested, but assumed working), you might be able to use the "browser" job type using playwright, which uses a browser's headless mode to render, see https://playwright.dev/docs/browsers -- piggy-backing on the browser's support of HTTP/2):

https://urlwatch.readthedocs.io/en/latest/jobs.html#browser

Using the "browser" job is a bit more heavyweight (full browser engine, but can run JavaScript and DOM stuff), but might be a workaround until HTTP/2 support is eventually added. It is (well, "should be") as simple as changing url to navigate in your jobs config, and making sure Playwright and a browser engine is installed.

There might be httpx or one of its forks(?) as possible HTTP/2-compatible replacement for requests. If somebody wants to give it a try, here is the current call to the requests library that would need to be replaced with another library.

[mar-svo]

.. playwright is quite big, but functional. Thank you.