feat: application layer heartbeat #136
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cssivision
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Apr 21, 2022
* feat: application layer heartbeat * feat: make heartbeat configurable * fix: update keepalive params * docs: update about heartbeat
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When connecting via a proxy, TCP keepalive can't make sure the whole connection is alive. Also in practice, some firewalls are found to intercept keepalive ACK packets. So application layer heartbeat is helpful in these cases.