[Bug]: A2ACardResolver.get_agent_card makes bad URLs when agent_card_path empty

[mwri]

What happened?

Calling A2ACardResolver(httpx_client, base_url, agent_card_path="").get_agent_card() yields a URL with a slash on the end, which may be benign, but sometimes is not, if it looks like https://host/some/path/.well-known/agent-card.json/ for example.

I came across this because I wanted to download the card from a card URL, not actually having a base and postfix path. It seems ridiculous to split my URL just so get_agent_card() can put it back together, but looking at the A2ACardResolver implementation it seems impossible to do it any other way.

I feel like the technically most undesirable behaviour seems to be that for a technically valid if surprising A2ACardResolver(agent_card_path=""), the call to get_agent_card() will always yield a trailing slash. For some paths that is innocuous, but others it is not.

Relevant log output

Code of Conduct

• I agree to follow this project's Code of Conduct

[rohityan]

Hi @mwri , I see that you have a PR opened for this. Will get back to you if there is anything required from you at this point.