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24 lines
530 B
Erlang
24 lines
530 B
Erlang
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%% This module sends an empty ping to the client and
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%% waits for a pong before sending a text frame. It
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%% is used to confirm server-initiated pings work.
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-module(ws_ping_h).
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-behavior(cowboy_websocket).
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-export([init/2]).
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-export([websocket_init/1]).
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-export([websocket_handle/2]).
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-export([websocket_info/2]).
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init(Req, _) ->
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{cowboy_websocket, Req, undefined}.
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websocket_init(State) ->
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{[{ping, <<>>}], State}.
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websocket_handle(pong, State) ->
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{[{text, <<"OK!!">>}], State}.
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websocket_info(_, State) ->
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{[], State}.
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