Use HTTP HEAD for reachability check to work fine under some strange …

[puppywang]

…networking.

ICMP pinging is the easiest way to check reachablity, but in some strange network, ICMP pinging is foribidden, so I add a mode to use HTTP HEAD request to double check reachablity.

[dustturtle]

nice try! Did you use this feature in your app?

[puppywang]

We've integrate the new code in our app and waiting for our QA to ensure that everything is OK. I will report back soon.

[dustturtle]

Any update or feedback?> @puppywang

[puppywang]

Sorry for late reply, as we provide SDK for other team in our company, It need more time to verify before it could be use in online environment.

[dustturtle]

any update now?>@puppywang