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libwebsockets/minimal-examples/ws-client/minimal-ws-client-ping
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Andy Green f7149e90c2 cc0: align dedication to CC0 FAQ recommended format 
https://libwebsockets.org/pipermail/libwebsockets/2019-April/007937.html

thanks to Bruce Perens for noting it.

This doesn't change the intention or status of the CC0 files, they were
pure CC0 before (ie, public domain) and they are pure CC0 now.  It just
gets rid of the (C) part at the top of the dedication which may be read
to be a bit contradictory since the purpose is to make it public domain.
2019-05-02 09:29:01 +01:00
..
CMakeLists.txt minimal-ws-client-ping 2018-05-09 17:00:37 +08:00
libwebsockets.org.cer minimal-ws-client-ping 2018-05-09 17:00:37 +08:00
minimal-ws-client-ping.c cc0: align dedication to CC0 FAQ recommended format 2019-05-02 09:29:01 +01:00
README.md minimal-ws-client: fix couple of breakages 2018-12-17 19:09:13 +08:00

README.md

lws minimal ws client PING

This connects to libwebsockets.org using the lws-mirror-protocol.

It then sends a ws PING every 5s and records any PONG coming back.

build

 $ cmake . && make

Commandline Options

Option Meaning
-d Set logging verbosity
--server Use a specific server instead of libwebsockets.org, eg --server localhost. Implies LCCSCF_ALLOW_SELFSIGNED
--port Use a specific port instead of 443, eg --port 7681
-z Send zero-length pings for testing
--protocol Use a specific ws subprotocol rather than lws-mirror-protocol, eg, --protocol myprotocol

usage

Just run it, wait for the connect and then there will be PINGs sent at 5s intervals.

 $ ./lws-minimal-ws-client-ping
[2018/05/09 16:55:03:1160] USER: LWS minimal ws client PING
[2018/05/09 16:55:03:1379] NOTICE: Creating Vhost 'default' (serving disabled), 1 protocols, IPv6 off
[2018/05/09 16:55:03:1715] NOTICE: client loaded CA for verification ./libwebsockets.org.cer
[2018/05/09 16:55:03:1717] NOTICE: created client ssl context for default
[2018/05/09 16:55:04:8332] USER: callback_minimal_broker: established
[2018/05/09 16:55:09:8389] USER: Sending PING 10...
[2018/05/09 16:55:10:1491] USER: LWS_CALLBACK_CLIENT_RECEIVE_PONG
[2018/05/09 16:55:10:1494] NOTICE: 
[2018/05/09 16:55:10:1514] NOTICE: 0000: 70 69 6E 67 20 62 6F 64 79 21                      ping body!      
[2018/05/09 16:55:10:1515] NOTICE: 
...