1 files changed, 42 insertions, 30 deletions
diff --git a/examples/tcp_reverse/src/reverse_protocol.erl b/examples/tcp_reverse/src/reverse_protocol.erl
index ea28d4e..6f7c770 100644
--- a/examples/tcp_reverse/src/reverse_protocol.erl
+++ b/examples/tcp_reverse/src/reverse_protocol.erl
@@ -1,61 +1,73 @@
 %% Feel free to use, reuse and abuse the code in this file.
 
 -module(reverse_protocol).
-
 -behaviour(gen_server).
 -behaviour(ranch_protocol).
 
+%% API.
 -export([start_link/4]).
 
--export([init/1, init/4, handle_call/3, handle_cast/2, handle_info/2,
-         terminate/2, code_change/3]).
-
--export([reverse_binary/1]).
+%% gen_server.
+-export([init/1]).
+-export([init/4]).
+-export([handle_call/3]).
+-export([handle_cast/2]).
+-export([handle_info/2]).
+-export([terminate/2]).
+-export([code_change/3]).
 
 -define(TIMEOUT, 5000).
 
 -record(state, {socket, transport}).
 
-reverse_binary(B) when is_binary(B) ->
-   [list_to_binary(
-       lists:reverse(
-           binary_to_list(binary:part(B, {0, byte_size(B)-2})))),
-    "\r\n"].
+%% API.
 
 start_link(Ref, Socket, Transport, Opts) ->
-    proc_lib:start_link(?MODULE, init, [Ref, Socket, Transport, Opts]).
+	proc_lib:start_link(?MODULE, init, [Ref, Socket, Transport, Opts]).
 
-init(Args) ->
-    {ok, Args}.
+%% gen_server.
+
+%% This function is never called. We only define it so that
+%% we can use the -behaviour(gen_server) attribute.
+init([]) -> {ok, undefined}.
 
 init(Ref, Socket, Transport, _Opts = []) ->
-    ok = proc_lib:init_ack({ok, self()}),
-    ok = ranch:accept_ack(Ref),
-    ok = Transport:setopts(Socket, [{active, once}]),
-    gen_server:enter_loop(?MODULE,[], {state, Socket, Transport},?TIMEOUT).
-
-handle_info({tcp, Socket, Data}, #state{transport = Transport} = State) ->
-    inet:setopts(State#state.socket, [{active, once}]),
-    Transport:send(Socket, reverse_binary(Data)),
-    {noreply, State, ?TIMEOUT};
+	ok = proc_lib:init_ack({ok, self()}),
+	ok = ranch:accept_ack(Ref),
+	ok = Transport:setopts(Socket, [{active, once}]),
+	gen_server:enter_loop(?MODULE, [],
+		#state{socket=Socket, transport=Transport},
+		?TIMEOUT).
+
+handle_info({tcp, Socket, Data}, State=#state{
+		socket=Socket, transport=Transport}) ->
+	Transport:setopts(Socket, [{active, once}]),
+	Transport:send(Socket, reverse_binary(Data)),
+	{noreply, State, ?TIMEOUT};
 handle_info({tcp_closed, _Socket}, State) ->
-    {stop, normal, State};
+	{stop, normal, State};
 handle_info({tcp_error, _, Reason}, State) ->
-    {stop, Reason, State};
+	{stop, Reason, State};
 handle_info(timeout, State) ->
-    {stop, normal, State};
+	{stop, normal, State};
 handle_info(_Info, State) ->
-    {stop, normal, State}.
+	{stop, normal, State}.
 
 handle_call(_Request, _From, State) ->
-    {reply, ok, State}.
+	{reply, ok, State}.
 
 handle_cast(_Msg, State) ->
-    {noreply, State}.
+	{noreply, State}.
 
 terminate(_Reason, _State) ->
-    ok.
+	ok.
 
 code_change(_OldVsn, State, _Extra) ->
-    {ok, State}.
+	{ok, State}.
+
+%% Internal.
 
+reverse_binary(B) when is_binary(B) ->
+	[list_to_binary(lists:reverse(binary_to_list(
+		binary:part(B, {0, byte_size(B)-2})
+	))), "\r\n"].