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diff --git a/src/cowboy_protocols_sup.erl b/src/cowboy_protocols_sup.erl
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+%% Copyright (c) 2011, Loïc Hoguin <[email protected]>
+%%
+%% Permission to use, copy, modify, and/or distribute this software for any
+%% purpose with or without fee is hereby granted, provided that the above
+%% copyright notice and this permission notice appear in all copies.
+%%
+%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+-module(cowboy_protocols_sup).
+-behaviour(supervisor).
+
+-export([start_link/0, start_protocol/4]). %% API.
+-export([init/1]). %% supervisor.
+
+-include("include/types.hrl").
+
+-define(SUPERVISOR, ?MODULE).
+
+%% API.
+
+-spec start_link() -> {ok, Pid::pid()}.
+start_link() ->
+	supervisor:start_link({local, ?SUPERVISOR}, ?MODULE, []).
+
+-spec start_protocol(Socket::socket(), Transport::module(),
+	Protocol::module(), Opts::term()) -> {ok, Pid::pid()}.
+start_protocol(Socket, Transport, Protocol, Opts) ->
+	Protocol:start_link(Socket, Transport, Opts).
+
+%% supervisor.
+
+-spec init([]) -> term(). %% @todo These specs should be improved.
+init([]) ->
+	{ok, {{simple_one_for_one, 0, 1}, [{?MODULE, {?MODULE, start_protocol, []},
+		temporary, brutal_kill, worker, [?MODULE]}]}}.