Ping at regular intervals.

[aaugustin]

Fix #383.

[aaugustin]

This can't be merged yet because it's missing tests.

[vgoklani]

Is it possible to control the text being passed in the ping: i.e. ping("keepalive")

[codecov]

Codecov Report

Merging #449 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #449   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          31     31           
  Lines        3429   3514   +85     
  Branches      340    344    +4     
=====================================
+ Hits         3429   3514   +85

Impacted Files	Coverage Δ
websockets/client.py	100% <ø> (ø)	⬆️
websockets/server.py	100% <ø> (ø)	⬆️
websockets/test_protocol.py	100% <100%> (ø)	⬆️
websockets/test_client_server.py	100% <100%> (ø)	⬆️
websockets/protocol.py	100% <100%> (ø)	⬆️

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[bmoscon]

Thanks for doing this. I tested your code with my application and it seems to be working. I can force a ping timeout by unplugging a network cable, and the ping timeout was hit within the ping_timeout

[aaugustin]

Thanks @bmoscon!