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Add cookie example
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Loïc Hoguin
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10 changed files with 159 additions and 0 deletions
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@ -4,6 +4,8 @@ Cowboy Examples
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* [chunked_hello_world](./examples/chunked_hello_world):
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demonstrates chunked data transfer with two one-second delays
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* [cookie](./examples/cookie):
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set cookies from server and client side
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* [echo_get](./examples/echo_get):
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parse and echo a GET query string
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18
examples/cookie/README.md
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18
examples/cookie/README.md
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@ -0,0 +1,18 @@
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Cowboy Cookie
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=============
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To compile this example you need rebar in your PATH.
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Type the following command:
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```
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$ rebar get-deps compile
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```
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You can then start the Erlang node with the following command:
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```
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./start.sh
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```
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Then point your browser to the indicated URL. This example allows
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you to use any path you want to try to show that cookies are defined
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site-wide. Try it in your browser!
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6
examples/cookie/rebar.config
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6
examples/cookie/rebar.config
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@ -0,0 +1,6 @@
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{deps, [
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{cowboy, ".*",
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{git, "git://github.com/extend/cowboy.git", "master"}},
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{erlydtl, ".*",
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{git, "https://github.com/evanmiller/erlydtl.git", "master"}}
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]}.
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15
examples/cookie/src/cookie.app.src
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15
examples/cookie/src/cookie.app.src
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@ -0,0 +1,15 @@
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%% Feel free to use, reuse and abuse the code in this file.
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{application, cookie, [
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{description, "Cowboy Cookie example."},
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{vsn, "1"},
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{modules, []},
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{registered, []},
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{applications, [
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kernel,
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stdlib,
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cowboy
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]},
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{mod, {cookie_app, []}},
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{env, []}
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]}.
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14
examples/cookie/src/cookie.erl
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14
examples/cookie/src/cookie.erl
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@ -0,0 +1,14 @@
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%% Feel free to use, reuse and abuse the code in this file.
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-module(cookie).
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%% API.
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-export([start/0]).
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%% API.
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start() ->
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ok = application:start(crypto),
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ok = application:start(ranch),
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ok = application:start(cowboy),
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ok = application:start(cookie).
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25
examples/cookie/src/cookie_app.erl
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25
examples/cookie/src/cookie_app.erl
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@ -0,0 +1,25 @@
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%% Feel free to use, reuse and abuse the code in this file.
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%% @private
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-module(cookie_app).
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-behaviour(application).
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%% API.
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-export([start/2]).
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-export([stop/1]).
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%% API.
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start(_Type, _Args) ->
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Dispatch = [
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{'_', [
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{'_', toppage_handler, []}
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]}
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],
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{ok, _} = cowboy:start_http(http, 100, [{port, 8080}], [
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{dispatch, Dispatch}
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]),
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cookie_sup:start_link().
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stop(_State) ->
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ok.
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23
examples/cookie/src/cookie_sup.erl
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23
examples/cookie/src/cookie_sup.erl
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@ -0,0 +1,23 @@
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%% Feel free to use, reuse and abuse the code in this file.
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%% @private
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-module(cookie_sup).
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-behaviour(supervisor).
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%% API.
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-export([start_link/0]).
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%% supervisor.
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-export([init/1]).
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%% API.
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-spec start_link() -> {ok, pid()}.
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start_link() ->
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supervisor:start_link({local, ?MODULE}, ?MODULE, []).
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%% supervisor.
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init([]) ->
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Procs = [],
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{ok, {{one_for_one, 10, 10}, Procs}}.
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29
examples/cookie/src/toppage_handler.erl
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29
examples/cookie/src/toppage_handler.erl
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%% Feel free to use, reuse and abuse the code in this file.
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%% @doc Cookie handler.
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-module(toppage_handler).
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-export([init/3]).
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-export([handle/2]).
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-export([terminate/2]).
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init(_Transport, Req, []) ->
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{ok, Req, undefined}.
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handle(Req, State) ->
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NewValue = integer_to_list(random:uniform(1000000)),
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Req2 = cowboy_req:set_resp_cookie(
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<<"server">>, NewValue, [{path, <<"/">>}], Req),
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{ClientCookie, Req3} = cowboy_req:cookie(<<"client">>, Req2),
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{ServerCookie, Req4} = cowboy_req:cookie(<<"server">>, Req3),
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{ok, Body} = toppage_dtl:render([
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{client, ClientCookie},
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{server, ServerCookie}
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]),
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{ok, Req5} = cowboy_req:reply(200,
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[{<<"content-type">>, <<"text/html">>}],
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Body, Req4),
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{ok, Req5, State}.
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terminate(_Req, _State) ->
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ok.
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3
examples/cookie/start.sh
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3
examples/cookie/start.sh
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@ -0,0 +1,3 @@
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#!/bin/sh
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erl -pa ebin deps/*/ebin -s cookie \
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-eval "io:format(\"Point your browser at http://localhost:8080~n\")."
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24
examples/cookie/templates/toppage.dtl
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24
examples/cookie/templates/toppage.dtl
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@ -0,0 +1,24 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Cowboy Cookie Example</title>
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</head>
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<body>
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<h1>Cowboy Cookie Example</h1>
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<p>Refresh the page to see the next cookie.</p>
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<h2>Cookie Set Server-Side</h2>
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<p>{{ server }}</p>
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<h2>Cookie Set Client-Side</h2>
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<p>{{ client }}</p>
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<script type="text/javascript">
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// <![CDATA[
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document.cookie="client=test=";
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// ]]>
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</script>
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</body>
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</html>
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