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<?php
/**
* Code for using a proxy XRI resolver.
*/
require_once 'Auth/Yadis/XRDS.php';
require_once 'Auth/Yadis/XRI.php';
class Auth_Yadis_ProxyResolver {
function Auth_Yadis_ProxyResolver($fetcher, $proxy_url = null)
{
$this->fetcher = $fetcher;
$this->proxy_url = $proxy_url;
if (!$this->proxy_url) {
$this->proxy_url = Auth_Yadis_getDefaultProxy();
}
}
function queryURL($xri, $service_type = null)
{
// trim off the xri:// prefix
$qxri = substr(Auth_Yadis_toURINormal($xri), 6);
$hxri = $this->proxy_url . $qxri;
$args = array(
'_xrd_r' => 'application/xrds+xml'
);
if ($service_type) {
$args['_xrd_t'] = $service_type;
} else {
// Don't perform service endpoint selection.
$args['_xrd_r'] .= ';sep=false';
}
$query = Auth_Yadis_XRIAppendArgs($hxri, $args);
return $query;
}
function query($xri, $service_types, $filters = array())
{
$services = array();
$canonicalID = null;
foreach ($service_types as $service_type) {
$url = $this->queryURL($xri, $service_type);
$response = $this->fetcher->get($url);
if ($response->status != 200 and $response->status != 206) {
continue;
}
$xrds = Auth_Yadis_XRDS::parseXRDS($response->body);
if (!$xrds) {
continue;
}
$canonicalID = Auth_Yadis_getCanonicalID($xri,
$xrds);
if ($canonicalID === false) {
return null;
}
$some_services = $xrds->services($filters);
$services = array_merge($services, $some_services);
// TODO:
// * If we do get hits for multiple service_types, we're
// almost certainly going to have duplicated service
// entries and broken priority ordering.
}
return array($canonicalID, $services);
}
}
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