NAME

       Net::Facebook::Oauth2 - a simple Perl wrapper around Facebook OAuth v2.0 protocol

SYNOPSIS

       Somewhere in your application's login process:

           use Net::Facebook::Oauth2;

           my $fb = Net::Facebook::Oauth2->new(
               application_id     => 'your_application_id',
               application_secret => 'your_application_secret',
               callback           => 'http://yourdomain.com/facebook/callback'
           );

           # get the authorization URL for your application
           my $url = $fb->get_authorization_url(
               scope   => [ 'public_profile', 'email', 'offline_access', 'publish_stream' ],
               display => 'page'
           );

       Now redirect the user to this $url.

       Once the user authorizes your application, Facebook will send him/her back to your
       application, on the "callback" link provided above.

       Inside that callback route, use the verifier code parameter that Facebook sends to get the
       access token:

           # param() below is a bogus function. Use whatever your web framework
           # provides (e.g. $c->req->param('code'), $cgi->param('code'), etc)
           my $code = param('code');

           my $access_token = $fb->get_access_token(code => $code);

       If you got so far, your user is logged! Save this access token in your database or
       session.

       Later on you can use it to communicate with Facebook on behalf of this user:

           my $fb = Net::Facebook::Oauth2->new(
               access_token => $access_token
           );

           my $info = $fb->get(
               'https://graph.facebook.com/v2.2/me'   # Facebook API URL
           );

           print $info->as_json;

DESCRIPTION

       Net::Facebook::Oauth2 gives you a way to simply access FaceBook Oauth 2.0 protocol

       For more information please see example folder shipped with this Module

SEE ALSO

       For more information about Facebook Oauth 2.0 API

       Please Check <http://developers.facebook.com/docs/>

       get/post Facebook Graph API <http://developers.facebook.com/docs/api>

USAGE

   "Net::Facebook::Oauth->new( %args )"
       Pass args as hash. %args are:

       •   "application_id "

           Your application id as you get from facebook developers platform when you register
           your application

       •   "application_secret"

           Your application secret id as you get from facebook developers platform when you
           register your application

   "$fb->get_authorization_url( %args )"
       Return an Authorization URL for your application, once you receive this URL redirect user
       there in order to authorize your application

       •   "scope"

           ['offline_access','publish_stream',...]

           Array of Extended permissions as described by facebook Oauth2.0 API you can get more
           information about scope/Extended Permission from

           <http://developers.facebook.com/docs/authentication/permissions>

           Please note that requesting information other than "public_profile", "email" and
           "user_friends" will require your app to be reviewed by Facebook!

       •   "callback"

           callback URL, where facebook will send users after they authorize your application

       •   "display"

           How to display Facebook Authorization page

           •   "page"

               This will display facebook authorization page as full page

           •   "popup"

               This option is useful if you want to popup authorization page as this option tell
               facebook to reduce the size of the authorization page

           •   "wab"

               From the name, for wab and mobile applications this option is the best facebook
               authorization page will fit there :)

   "$fb->get_access_token( %args )"
       Returns access_token string One arg to pass

       •   "code"

           This is the verifier code that facebook send back to your callback URL once user
           authorize your app, you need to capture this code and pass to this method in order to
           get access_token

           Verifier code will be presented with your callback URL as code parameter as the
           following

           http://your-call-back-url.com?code=234er7y6fdgjdssgfsd...

           When access token is returned you need to save it in a secure place in order to use it
           later in your application

   "$fb->get( $url,$args )"
       Send get request to facebook and returns response back from facebook

       •   "url"

           Facebook Graph API URL as string

       •   $args

           hashref of parameters to be sent with graph API URL if required

       The response returned can be formatted as the following

       •   "$response>as_json"

           Returns response as json object

       •   "$response>as_hash"

           Returns response as perl hashref

       For more information about facebook grapg API, please check
       http://developers.facebook.com/docs/api

   "$fb->post( $url,$args )"
       Send post request to facebook API, usually to post something

       •   "url"

           Facebook Graph API URL as string

       •   $args

           hashref of parameters to be sent with graph API URL

       For more information about facebook grapg API, please check
       <http://developers.facebook.com/docs/api>

AUTHOR

       Mahmoud A. Mehyar, <mamod.mehyar@gmail.com>

CONTRIBUTORS

       Big Thanks To

       •   Takatsugu Shigeta @comewalk <https://github.com/comewalk>

       •   Breno G. de Oliveira @garu <https://github.com/garu>

       •   squinker @squinker <https://github.com/squinker>

       •   Valcho Nedelchev @valchonedelchev <https://github.com/valchonedelchev>

COPYRIGHT AND LICENSE

       Copyright (C) 2012-2015 by Mahmoud A. Mehyar

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself, either Perl version 5.10.1 or, at your option, any later version of
       Perl 5 you may have available.