virtan / simple_oauth2

Simple erlang OAuth2 client module for any http server framework (Google, Facebook, Yandex, Vkontakte are preconfigured)

simple_oauth2
==============

Simple OAuth2 client for any http server framework

Inspired by and based on https://github.com/dvv/social
Preconfigured to authorize users of Google, Facebook, Yandex, Vkontakte, Mail.ru


Usage
--------------

1. Create OAuth2 web site app keys at
  Google: https://code.google.com/apis/console/b/0/
  Facebook: https://developers.facebook.com/apps/
  Yandex: https://oauth.yandex.ru/client/new
  Vkontakte: http://vk.com/dev

2. Integrate into you http server framework

   Example for MochiWeb (https://github.com/mochi/mochiweb):

      SocNets = simple_oauth2:customize_networks(simple_oauth2:predefined_networks(), [
              {<<"google">>, [
                      {client_id, <<"GOOGLE_CLIENT_ID">>},
                      {client_secret, <<"GOOGLE_CLIENT_SECRET">>}
                  ]},
              {<<"yandex">>, [
                      {client_id, <<"YANDEX_CLIENT_ID">>},
                      {client_secret, <<"YANDEX_CLIENT_SECRET">>}
                  ]},
              {<<"vkontakte">>, [
                      {client_id, <<"VK_CLIENT_ID">>},
                      {client_secret, <<"VK_CLIENT_SECRET">>}
                  ]},
              {<<"facebook">>, [
                      {client_id, <<"FB_CLIENT_ID">>},
                      {client_secret, <<"FB_CLIENT_SECRET">>}
                  ]},
              {<<"mailru">>, [
                      {client_id, <<"MR_CLIENT_ID">>},
                      {client_secret, <<"MR_CLIENT_SECRET">>},
                      {client_secret_key, <<"MR_CLIENT_SECRET_KEY">>}
                  ]}
          ]),
      UrlPrefix = iolist_to_binary([atom_to_list(Req:get(scheme)), "://",
              Req:get_header_value("host")]),
      case simple_oauth2:dispatcher(list_to_binary(Req:get(raw_path)), UrlPrefix, SocNets) of
          {redirect, Where} -> Req:respond({302,
                      [{"Location", simple_oauth2:gather_url_get(Where)}], []});
          {send_html, HTML} -> Req:ok({"text/html; charset=utf-8", HTML});
          {ok, AuthData} ->
              Req:ok({"text/plain; charset=utf-8", io_lib:format("~p~n", [AuthData])});
          {error, Class, Reason} ->
              Req:ok({"text/plain; charset=utf-8",
                io_lib:format("Error: ~p ~p~n", [Class, Reason])})
      end.

3. Start ssl and inets erlang applications before

You can easily add more social networks (see simple_oauth2:predefined_networks())
with OAuth2 authorization.


Known issues (TODO)
--------------

1. Support of GitHub, Paypal is upcoming
2. Vk doesn't provide email
3. Yandex doesn't provide picture


License (MIT)
--------------

Copyright (c) 2013 Igor Milyakov <[e-mail]>

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.