Medium hub doesn't verify intent

[alesito85]

I'm trying to subscribe to some topics but I have issues because the Medium hub doesn't verify my intent - it doesn't contact my callback to have the challenge returned.

I've verified that the server is reachable and is responding, but no requests are coming through. Should I check something else?

And yes, the request for subscription did return 202.

Is the callback ok to be https?

Also some feeds can't be added at all, returning an error 422 with text Please provide a valid hub.topic (feed) URL that is accepted on this hub. This url could not be fetched. Even though it's a valid user. This happens even after correcting it to the url that the response tells me the topic has to be. For example I did a test with https://yieldguild.medium.com/feed and got response that the topic should be https://medium.com/@yieldguild/feed. But when I set this topic I get error 422.

[julien51]

Thanks for reporting! We will be investugating! Can you send us an example of full request you are sending? Thanks!

[alesito85]

I don't currently have it on hand, but what I've found was that I can get it to work if I retry subscribe up to 10 times. Meaning sending the same request and it will eventually work.

I do have another issue that I've somehow circumvented to resolve it. I couldn't get a callback to one domain via HTTPS, while I could get it to another. The resolution ended up being to use HTTP.

I've checked Nginx logs and the request doesn't reach the server at all when using HTTPS.

Both domains are through proxied CloudFlare DNS.