9 files changed, 184 insertions, 0 deletions
diff --git a/examples/eventsource/README.md b/examples/eventsource/README.md
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+Cowboy EventSource
+==================
+
+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
+```
+
+Uses Cowboy's loop functionality to continuously send events to the browser.
+
+Example
+-------
+
+Point your browser to http://localhost:8080 to see EventSource in action with
+any modern browser (not IE).
diff --git a/examples/eventsource/priv/index.html b/examples/eventsource/priv/index.html
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+<!DOCTYPE html>
+<html>
+	<head>
+		<script type="text/javascript">
+			function ready() {
+				if (!!window.EventSource) {
+					setupEventSource();
+				} else {
+					document.getElementById('status').innerHTML =
+						"Sorry but your browser doesn't support the EventSource API";
+				}
+			}
+
+			function setupEventSource() {
+				var source = new EventSource('/eventsource');
+
+				source.addEventListener('message', function(event) {
+					addStatus("server sent the following: '" + event.data + "'");
+					}, false);
+
+					source.addEventListener('open', function(event) {
+						addStatus('eventsource connected.')
+					}, false);
+
+					source.addEventListener('error', function(event) {
+						if (event.eventPhase == EventSource.CLOSED) {
+							addStatus('eventsource was closed.')
+						}
+					}, false);
+			}
+
+			function addStatus(text) {
+				var date = new Date();
+				document.getElementById('status').innerHTML
+				= document.getElementById('status').innerHTML
+				+ date + ": " + text + "<br/>";
+			}
+		</script>
+	</head>
+	<body onload="ready();">
+		Hi!
+		<div id="status"></div>
+	</body>
+</html>
diff --git a/examples/eventsource/rebar.config b/examples/eventsource/rebar.config
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+++ b/examples/eventsource/rebar.config
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+{deps, [
+	{cowboy, ".*",
+		{git, "git://github.com/extend/cowboy.git", "master"}},
+	{mimetypes, ".*",
+		{git, "git://github.com/spawngrid/mimetypes.git", "master"}}
+]}.
diff --git a/examples/eventsource/src/eventsource.app.src b/examples/eventsource/src/eventsource.app.src
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+++ b/examples/eventsource/src/eventsource.app.src
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+%% Feel free to use, reuse and abuse the code in this file.
+
+{application, eventsource, [
+	{description, "Cowboy EventSource example."},
+	{vsn, "1"},
+	{modules, []},
+	{registered, []},
+	{applications, [
+		kernel,
+		stdlib,
+		cowboy
+	]},
+	{mod, {eventsource_app, []}},
+	{env, []}
+]}.
diff --git a/examples/eventsource/src/eventsource.erl b/examples/eventsource/src/eventsource.erl
new file mode 100644
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+++ b/examples/eventsource/src/eventsource.erl
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+%% Feel free to use, reuse and abuse the code in this file.
+
+-module(eventsource).
+
+%% API.
+-export([start/0]).
+
+%% API.
+
+start() ->
+	ok = application:start(crypto),
+	ok = application:start(ranch),
+	ok = application:start(cowboy),
+	ok = application:start(eventsource).
diff --git a/examples/eventsource/src/eventsource_app.erl b/examples/eventsource/src/eventsource_app.erl
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+++ b/examples/eventsource/src/eventsource_app.erl
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+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(eventsource_app).
+-behaviour(application).
+
+%% API.
+-export([start/2]).
+-export([stop/1]).
+
+%% API.
+
+start(_Type, _Args) ->
+	Dispatch = cowboy_router:compile([
+		{'_', [
+			{"/eventsource", eventsource_handler, []},
+			{"/", cowboy_static, [
+				{directory, {priv_dir, eventsource, []}},
+				{file, <<"index.html">>},
+				{mimetypes, {fun mimetypes:path_to_mimes/2, default}}
+			]}
+		]}
+	]),
+	{ok, _} = cowboy:start_http(http, 100, [{port, 8080}], [
+		{env, [{dispatch, Dispatch}]}
+	]),
+	eventsource_sup:start_link().
+
+stop(_State) ->
+	ok.
diff --git a/examples/eventsource/src/eventsource_handler.erl b/examples/eventsource/src/eventsource_handler.erl
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+++ b/examples/eventsource/src/eventsource_handler.erl
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+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @doc EventSource emitter.
+-module(eventsource_handler).
+
+-export([init/3]).
+-export([info/3]).
+-export([terminate/3]).
+
+init(_Transport, Req, []) ->
+	Headers = [{<<"content-type">>, <<"text/event-stream">>}],
+	{ok, Req2} = cowboy_req:chunked_reply(200, Headers, Req),
+	erlang:send_after(1000, self(), {message, "Tick"}),
+	{loop, Req2, undefined, 5000}.
+
+info({message, Msg}, Req, State) ->
+	ok = cowboy_req:chunk(["id: ", id(), "\ndata: ", Msg, "\n\n"], Req),
+	erlang:send_after(1000, self(), {message, "Tick"}),
+	{loop, Req, State}.
+
+terminate(_Reason, _Req, _State) ->
+	ok.
+
+id() ->
+	{Mega, Sec, Micro} = erlang:now(),
+	Id = (Mega * 1000000 + Sec) * 1000000 + Micro,
+	integer_to_list(Id, 16).
diff --git a/examples/eventsource/src/eventsource_sup.erl b/examples/eventsource/src/eventsource_sup.erl
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+++ b/examples/eventsource/src/eventsource_sup.erl
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+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(eventsource_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/eventsource/start.sh b/examples/eventsource/start.sh
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+++ b/examples/eventsource/start.sh
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+#!/bin/sh
+erl -pa ebin deps/*/ebin -s eventsource \
+	-eval "io:format(\"Point your browser at http://localhost:8080/~n\")."