List Contacts from a group from Zend GData - php

Question

and thanks for reading.
My problem is that I'm trying to get a list of contacts belonging to a group in GData using Zend_Gdata_Query.
Using
$query = new Zend_Gdata_Query('http://www.google.com/m8/feeds/contacts/default/full/?group=http://www.google.com/m8/feeds/groups/xxx...xxx/base/XXX');
$feed = $gdata->getFeed($query);
give me an "Unknown authorization header".
$query = new Zend_Gdata_Query('http://www.google.com/m8/feeds/contacts/default/full/');
$query->setParam('group', 'http://www.google.com/m8/feeds/groups/XXX...XXX/base/XXX');
$feed = $gdata->getFeed($query);
is the same.
Obviously without that parameter I get all the contacts.
I already tried the first method with the parameter in the URL with a modified Extension to CakePHP core HttpSocket and it was working. So I suppose the problem is with Zend stripping out parameters from the url but I had no luck looking at the libraries.
Thanks for any help.

Answer 1

$query->setParam('group', 'http://www.google.com/m8/feeds/groups/myemail%40gmail.com/base/xxxxxxxxxxxxxx');
xxxxxxxxxxxxxx = group ID

Answer 2

As above the max-results also works if you add it to the query string like so:
http://www.google.com/m8/feeds/contacts/default/full?max-results=1000
Note that even in the google documentation the only way of getting ALL results is by 'setting a high number' for the number of results returned. So you can never explicitly specify 'ALL'

Answer 3

I guess you are using 3-legged OAuth. Then you need to add next line before getFeed() called:
$gdata->getHttpClient()->setRequestScheme(Zend_Oauth::REQUEST_SCHEME_QUERYSTRING);
It will solve "Unknown authorization header" error.
For me using
$query->setParam('group', 'http://www.google.com/m8/feeds/groups/XXX...XXX/base/XXX');
returns another error: "Invalid value for group parameter: XXXXXXXXXX" and I still dunno how to fix it :(