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%% This module implements a loop handler for long-polling.
%% It starts by sending itself a message after 200ms,
%% then sends another after that for a total of 3 messages.
%% When it receives the last message, it sends a 102 reply back.
-module(long_polling_h).
-behaviour(cowboy_loop_handler).
-export([init/3]).
-export([info/3]).
-export([terminate/3]).
init(_, Req, _) ->
erlang:send_after(200, self(), timeout),
{loop, Req, 2, 5000, hibernate}.
info(timeout, Req, 0) ->
{ok, Req2} = cowboy_req:reply(102, Req),
{ok, Req2, 0};
info(timeout, Req, Count) ->
erlang:send_after(200, self(), timeout),
{loop, Req, Count - 1, hibernate}.
terminate({normal, shutdown}, _, 0) ->
ok;
terminate({error, overflow}, _, _) ->
ok.
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