gunnarstrand at yahoo
Oct 15, 2009, 1:22 PM
Post #3 of 4
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Re: Facebook canvas application in Catalyst
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________________________________
From: J. Shirley <jshirley [at] gmail>
To: The elegant MVC web framework <catalyst [at] lists>
Sent: Thu, October 15, 2009 9:44:13 PM
Subject: Re: [Catalyst] Facebook canvas application in Catalyst
On Thu, Oct 15, 2009 at 12:25 PM, Gunnar Strand <gunnarstrand [at] yahoo> wrote:
>Hi,
>
>>I am trying to write a Facebook canvas application in Catalyst using the WWW::Facebook::API plugin and I am tearing my hair trying to get it to work.
>
>>I have no problems with access to my canvas application from Facebook, but I am unable to use any of the $c->facebook interface methods to acquire user data, eg. friend list, event information etc.
>
>>I would be very grateful if anyone could post an example of, for instance, getting the currently logged in user's friends, or event information or any information at all via the $c->facebook interface. All I get is error when using the methods in the interface and the problem is definitely on this side of the keyboard.
>
>>KR,
>>Gunnar
>
Hi Gunnar,
I've been meaning to write a blog entry on this, since there are some points to be aware of. I've built my own model that creates a per-context instance and works quite well. It isn't on CPAN (yet) but I should probably release it.
I would advise against using the Plugin, as it's not modifying the application behavior or dispatching so having it as a plugin is a bad fit.
I posted my code in a gist: http://gist.github.com/211218
Keep in mind that you can't do differentiation on request type like GET/POST through the canvas. Make sure that you have the application added to your profile (check the app added, there is a chain mid-point to do this in the gist).
Hope this helps,
-J
Hi J,
Thank you for the quick reply! I have looked through the code and I cannot understand what the problem is for me. I have tried making this as simple as possible to eliminate any potential errors and still don't get it to work. I removed the plugin and I now have this code in the top index, some shamelessly copied from your page :-):
sub index : Path : Args(0) {
my ( $self, $c ) = @_;
my $client = new WWW::Facebook::API(
app_id => '174563349128',
api_key => 'ce82845d86baa6d633efa5f00d83575a',
desktop => 0,
secret => '<secret id>',
);
my $params = $c->req->params;
my $fb_params = $client->canvas->get_fb_params( $c->req );
if ( $params->{'auth_token'} ) {
$client->auth->get_session( $params->{'auth_token'} );
}
if ( $fb_params->{session_key} ) {
$client->session_key( $fb_params->{session_key} );
}
use Data::Dumper;
my $output = Dumper( $client->friends->get );
$c->response->body( '<pre>'
. $output
. '</pre>'
);
And the output is still:
$VAR1 = {
'error_msg' => 'Incorrect signature',
'request_args' => [.
{
'value' => 'ce82845d86baa6d633efa5f00d83575a',
'key' => 'api_key'
},
{
'value' => 'JSON',
'key' => 'format'
},
{
'value' => 'facebook.friends.get',
'key' => 'method'
},
{
'value' => '2.0POf_Dzs6W1VEJY2ZW1J5A__.86400.1255726800-100000257794276',
'key' => 'session_key'
},
{
'value' => '1.0',
'key' => 'v'
},
{
'value' => 'f5558065b76063dd63a8777eb5da8d7a',
'key' => 'sig'
}
],
'error_code' => 104
};
I've rechecked the api_key and secret, and they are correct. I guess that that the source above really should product useful output?
KR,
Gunnar
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