NAME

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

SYNOPSIS

use CGI; my $cgi = CGI->new;

use Net::Facebook::Oauth2;

my $fb = Net::Facebook::Oauth2->new( application_id => 'your_application_id', application_secret => 'your_application_secret' );

###get authorization URL for your application my $url = $fb->get_authorization_url( scope => ['offline_access','publish_stream'], callback => 'http://yourdomain.com/facebook/callback', display => 'page' );

####now redirect to this url print $cgi->redirect($url);

##once user vauthorize your application facebook will send him/her back to your application ##to the callback link provided above

###in your callback block capture verifier code and get access_token

my $fb = Net::Facebook::Oauth2->new( application_id => 'your_application_id', application_secret => 'your_application_secret' );

my $access_token = $fb->get_access_token(code => $cgi->param('code')); ###save this token in database or session

##later on your application you can use this verifier code to comunicate ##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/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

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
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>

COPYRIGHT AND LICENSE

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.