I have a question about the lease_seconds parameter ... it seems the behaviour at different hubs is quite different.
The PubSubHubbub specification says: "Number of seconds for which the subscriber would like to have the subscription active. If not present or an empty value, the subscription will be permanent (or active until automatic refreshing removes the subscription). Hubs MAY choose to respect this value or not, depending on their own policies." With the appspot hub, if I leave the value as null, the hub decides on a length of 5 days. Does that mean that the subscription will expire after 5 days unless I subscribe again, or will the hub send me a re- verification request every five days? Also, it seems the appspot hub will not allow me to specify lease_seconds to be bigger than 10 days -- anything bigger & I get a reply back with 10 days. So again my question is -- who will initiate the refreshing -- me or the hub? With pushpress hubs, I always get a subscription length of 10 years, regardless of what I specify in my request.
