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28 lines
759 B
Erlang
28 lines
759 B
Erlang
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%% Feel free to use, reuse and abuse the code in this file.
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%% @doc EventSource emitter.
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-module(eventsource_handler).
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-export([init/3]).
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-export([info/3]).
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-export([terminate/3]).
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init(_Transport, Req, []) ->
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Headers = [{<<"content-type">>, <<"text/event-stream">>}],
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{ok, Req2} = cowboy_req:chunked_reply(200, Headers, Req),
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erlang:send_after(1000, self(), {message, "Tick"}),
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{loop, Req2, undefined, 5000}.
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info({message, Msg}, Req, State) ->
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ok = cowboy_req:chunk(["id: ", id(), "\ndata: ", Msg, "\n\n"], Req),
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erlang:send_after(1000, self(), {message, "Tick"}),
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{loop, Req, State}.
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terminate(_Reason, _Req, _State) ->
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ok.
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id() ->
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{Mega, Sec, Micro} = erlang:now(),
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Id = (Mega * 1000000 + Sec) * 1000000 + Micro,
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integer_to_list(Id, 16).
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