Kang

"Keep your connections with APNs open across multiple notifications; don’t repeatedly open and close connections. APNs treats rapid connection and disconnection as a denial-of-service attack. " maybe this is why...

Send() or Post() will close the connection, if you test your provider by browser.And maybe that is why your provider is refused by server. I found that by google: "HTTP/2...

Maybe my poor English cause you misunderstood what I meant. Can you tell me how do you construct your provider?And how do you let your provider to request APNs to...