Add a simple multipart upload example

examples/upload/src/upload.app.src

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

examples/upload/src/upload_app.erl

@@ -0,0 +1,25 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(upload_app).
+-behaviour(application).
+
+%% API.
+-export([start/2]).
+-export([stop/1]).
+
+%% API.
+start(_Type, _Args) ->
+	Dispatch = cowboy_router:compile([
+		{'_', [
+			{"/", cowboy_static, {priv_file, upload, "index.html"}},
+			{"/upload", upload_handler, []},
+			{"/files/[...]", cowboy_static, {priv_dir, upload, "files"}}
+		]}
+	]),
+	{ok, _} = cowboy:start_http(http, 100, [{port, 8080}],
+		[{env, [{dispatch, Dispatch}]}]),
+	upload_sup:start_link().
+
+stop(_State) ->
+	ok.

examples/upload/src/upload_handler.erl

@@ -0,0 +1,21 @@
+-module(upload_handler).
+-behaviour(cowboy_http_handler).
+
+-export([init/3]).
+-export([handle/2]).
+-export([terminate/3]).
+
+init(_, Req, _Opts) ->
+	{ok, Req, undefined}.
+
+handle(Req, State) ->
+	{ok, Headers, Req2} = cowboy_req:part(Req),
+	{ok, Data, Req3} = cowboy_req:part_body(Req2),
+	{file, <<"inputfile">>, Filename, ContentType, _TE}
+		= cow_multipart:form_data(Headers),
+	io:format("Received file ~p of content-type ~p as follow:~n~p~n~n",
+		[Filename, ContentType, Data]),
+	{ok, Req3, State}.
+
+terminate(_Reason, _Req, _State) ->
+	ok.

examples/upload/src/upload_sup.erl

@@ -0,0 +1,23 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(upload_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}}.