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',
    callback => 'http://yourdomain.com/facebook/callback'
);

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

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

##once user authorizes 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',
    callback => 'http://yourdomain.com/facebook/callback'
);

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

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

• 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

INSTALLATION

To install this module type the following:

perl Makefile.PL
make
make test
make install

DEPENDENCIES

This module requires these other modules and libraries:

Jason::Any
LWP::UserAgent
URI::Escape

AUTHOR

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

COPYRIGHT AND LICENSE

Copyright (C) 2012 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.