From a07d063fd8fc8a1cfadcb35cc89e190695773fe8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= <essen@ninenines.eu>
Date: Thu, 20 Dec 2012 14:40:22 +0100
Subject: Add cookie example

---
 examples/README.md                      |  2 ++
 examples/cookie/README.md               | 18 ++++++++++++++++++
 examples/cookie/rebar.config            |  6 ++++++
 examples/cookie/src/cookie.app.src      | 15 +++++++++++++++
 examples/cookie/src/cookie.erl          | 14 ++++++++++++++
 examples/cookie/src/cookie_app.erl      | 25 +++++++++++++++++++++++++
 examples/cookie/src/cookie_sup.erl      | 23 +++++++++++++++++++++++
 examples/cookie/src/toppage_handler.erl | 29 +++++++++++++++++++++++++++++
 examples/cookie/start.sh                |  3 +++
 examples/cookie/templates/toppage.dtl   | 24 ++++++++++++++++++++++++
 10 files changed, 159 insertions(+)
 create mode 100644 examples/cookie/README.md
 create mode 100644 examples/cookie/rebar.config
 create mode 100644 examples/cookie/src/cookie.app.src
 create mode 100644 examples/cookie/src/cookie.erl
 create mode 100644 examples/cookie/src/cookie_app.erl
 create mode 100644 examples/cookie/src/cookie_sup.erl
 create mode 100644 examples/cookie/src/toppage_handler.erl
 create mode 100755 examples/cookie/start.sh
 create mode 100644 examples/cookie/templates/toppage.dtl

diff --git a/examples/README.md b/examples/README.md
index 598420c..c0e1f41 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -4,6 +4,8 @@ Cowboy Examples
  *  [chunked_hello_world](./examples/chunked_hello_world):
     demonstrates chunked data transfer with two one-second delays
 
+ *  [cookie](./examples/cookie):
+    set cookies from server and client side
 
  *  [echo_get](./examples/echo_get):
     parse and echo a GET query string
diff --git a/examples/cookie/README.md b/examples/cookie/README.md
new file mode 100644
index 0000000..cb6465f
--- /dev/null
+++ b/examples/cookie/README.md
@@ -0,0 +1,18 @@
+Cowboy Cookie
+=============
+
+To compile this example you need rebar in your PATH.
+
+Type the following command:
+```
+$ rebar get-deps compile
+```
+
+You can then start the Erlang node with the following command:
+```
+./start.sh
+```
+
+Then point your browser to the indicated URL. This example allows
+you to use any path you want to try to show that cookies are defined
+site-wide. Try it in your browser!
diff --git a/examples/cookie/rebar.config b/examples/cookie/rebar.config
new file mode 100644
index 0000000..d1fecef
--- /dev/null
+++ b/examples/cookie/rebar.config
@@ -0,0 +1,6 @@
+{deps, [
+	{cowboy, ".*",
+		{git, "git://github.com/extend/cowboy.git", "master"}},
+	{erlydtl, ".*",
+		{git, "https://github.com/evanmiller/erlydtl.git", "master"}}
+]}.
diff --git a/examples/cookie/src/cookie.app.src b/examples/cookie/src/cookie.app.src
new file mode 100644
index 0000000..1e9cd3d
--- /dev/null
+++ b/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, []}
+]}.
diff --git a/examples/cookie/src/cookie.erl b/examples/cookie/src/cookie.erl
new file mode 100644
index 0000000..455fcb0
--- /dev/null
+++ b/examples/cookie/src/cookie.erl
@@ -0,0 +1,14 @@
+%% 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).
diff --git a/examples/cookie/src/cookie_app.erl b/examples/cookie/src/cookie_app.erl
new file mode 100644
index 0000000..195d6b6
--- /dev/null
+++ b/examples/cookie/src/cookie_app.erl
@@ -0,0 +1,25 @@
+%% 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.
diff --git a/examples/cookie/src/cookie_sup.erl b/examples/cookie/src/cookie_sup.erl
new file mode 100644
index 0000000..5ba4e53
--- /dev/null
+++ b/examples/cookie/src/cookie_sup.erl
@@ -0,0 +1,23 @@
+%% 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}}.
diff --git a/examples/cookie/src/toppage_handler.erl b/examples/cookie/src/toppage_handler.erl
new file mode 100644
index 0000000..783cda6
--- /dev/null
+++ b/examples/cookie/src/toppage_handler.erl
@@ -0,0 +1,29 @@
+%% 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.
diff --git a/examples/cookie/start.sh b/examples/cookie/start.sh
new file mode 100755
index 0000000..7b1d728
--- /dev/null
+++ b/examples/cookie/start.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+erl -pa ebin deps/*/ebin -s cookie \
+	-eval "io:format(\"Point your browser at http://localhost:8080~n\")."
diff --git a/examples/cookie/templates/toppage.dtl b/examples/cookie/templates/toppage.dtl
new file mode 100644
index 0000000..e6faa2b
--- /dev/null
+++ b/examples/cookie/templates/toppage.dtl
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="utf-8">
+	<title>Cowboy Cookie Example</title>
+</head>
+
+<body>
+	<h1>Cowboy Cookie Example</h1>
+	<p>Refresh the page to see the next cookie.</p>
+
+	<h2>Cookie Set Server-Side</h2>
+	<p>{{ server }}</p>
+
+	<h2>Cookie Set Client-Side</h2>
+	<p>{{ client }}</p>
+
+	<script type="text/javascript">
+// <![CDATA[
+document.cookie="client=test=";
+// ]]>
+	</script>
+</body>
+</html>
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