Add cookie example

examples/cookie/src/cookie.app.src

@@ -0,0 +1,15 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+{application, cookie, [
+	{description, "Cowboy Cookie example."},
+	{vsn, "1"},
+	{modules, []},
+	{registered, []},
+	{applications, [
+		kernel,
+		stdlib,
+		cowboy
+	]},
+	{mod, {cookie_app, []}},
+	{env, []}
+]}.

examples/cookie/src/cookie.erl

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+%% Feel free to use, reuse and abuse the code in this file.
+
+-module(cookie).
+
+%% API.
+-export([start/0]).
+
+%% API.
+
+start() ->
+	ok = application:start(crypto),
+	ok = application:start(ranch),
+	ok = application:start(cowboy),
+	ok = application:start(cookie).

examples/cookie/src/cookie_app.erl

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+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(cookie_app).
+-behaviour(application).
+
+%% API.
+-export([start/2]).
+-export([stop/1]).
+
+%% API.
+
+start(_Type, _Args) ->
+	Dispatch = [
+		{'_', [
+			{'_', toppage_handler, []}
+		]}
+	],
+	{ok, _} = cowboy:start_http(http, 100, [{port, 8080}], [
+		{dispatch, Dispatch}
+	]),
+	cookie_sup:start_link().
+
+stop(_State) ->
+	ok.

examples/cookie/src/cookie_sup.erl

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+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(cookie_sup).
+-behaviour(supervisor).
+
+%% API.
+-export([start_link/0]).
+
+%% supervisor.
+-export([init/1]).
+
+%% API.
+
+-spec start_link() -> {ok, pid()}.
+start_link() ->
+	supervisor:start_link({local, ?MODULE}, ?MODULE, []).
+
+%% supervisor.
+
+init([]) ->
+	Procs = [],
+	{ok, {{one_for_one, 10, 10}, Procs}}.

examples/cookie/src/toppage_handler.erl

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+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @doc Cookie handler.
+-module(toppage_handler).
+
+-export([init/3]).
+-export([handle/2]).
+-export([terminate/2]).
+
+init(_Transport, Req, []) ->
+	{ok, Req, undefined}.
+
+handle(Req, State) ->
+	NewValue = integer_to_list(random:uniform(1000000)),
+	Req2 = cowboy_req:set_resp_cookie(
+		<<"server">>, NewValue, [{path, <<"/">>}], Req),
+	{ClientCookie, Req3} = cowboy_req:cookie(<<"client">>, Req2),
+	{ServerCookie, Req4} = cowboy_req:cookie(<<"server">>, Req3),
+	{ok, Body} = toppage_dtl:render([
+		{client, ClientCookie},
+		{server, ServerCookie}
+	]),
+	{ok, Req5} = cowboy_req:reply(200,
+		[{<<"content-type">>, <<"text/html">>}],
+		Body, Req4),
+	{ok, Req5, State}.
+
+terminate(_Req, _State) ->
+	ok.