Adding a socket handler for keep TCP connection #3422
Merged
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This is not a http keepalive option. It is TCP level which is lower than HTTP.
It will send meanless ack flag packet to server.
so it wouldn't be dropped TCP connection by server side
like Firewall, Loadbalancer, Nginx etc.
Behavior overview
Before behavior
As you see the connection closed by server (RST falg)
After behavior
Server didn't close the connection because ping pong ACK flag packets.
Actually this is a general behavior in web browsers