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%% This module implements a loop handler that sends
%% the current time every second using SSE.
-module(sse_clock_h).
-export([init/2]).
-export([info/3]).
init(Req, State) ->
self() ! timeout,
{cowboy_loop, cowboy_req:stream_reply(200, #{
<<"content-type">> => <<"text/event-stream">>
}, Req), State}.
info(timeout, Req, State) ->
erlang:send_after(1000, self(), timeout),
cowboy_req:stream_events(#{
data => data(State)
}, nofin, Req),
{ok, Req, State}.
data(date) ->
cowboy_clock:rfc1123();
data(Size) when is_integer(Size) ->
lists:duplicate(Size, $0).
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