/**
* This should be called statically and will build a Yadis
* instance if the discovery process succeeds. This implements
* Yadis discovery as specified in the Yadis specification.
*
* @param string $uri The URI on which to perform Yadis discovery.
*
* @param array $http_response An array reference where the HTTP
* response object will be stored (see {@link
* Auth_Yadis_HTTPResponse}.
*
* @param Auth_Yadis_HTTPFetcher $fetcher An instance of a
* Auth_Yadis_HTTPFetcher subclass.
*
* @param array $extra_ns_map An array which maps namespace names
* to namespace URIs to be used when parsing the Yadis XRDS
* document.
*
* @param integer $timeout An optional fetcher timeout, in seconds.
*
* @return mixed $obj Either null or an instance of
* Auth_Yadis_Yadis, depending on whether the discovery
* succeeded.
*/
function discover($uri, &$fetcher, $extra_ns_map = null, $timeout = 20)
{
$result = new Auth_Yadis_DiscoveryResult($uri);
$request_uri = $uri;
$headers = array("Accept: " . Auth_Yadis_CONTENT_TYPE . ', text/html; q=0.3, application/xhtml+xml; q=0.5');
if ($fetcher === null) {
$fetcher = Auth_Yadis_Yadis::getHTTPFetcher($timeout);
}
$response = $fetcher->get($uri, $headers);
if (!$response || ($response->status != 200 and $response->status != 206)) {
$result->fail();
return $result;
}
$result->normalized_uri = $response->final_url;
$result->content_type = Auth_Yadis_Yadis::_getHeader($response->headers, array('content-type'));
if ($result->content_type && Auth_Yadis_Yadis::_getContentType($result->content_type) == Auth_Yadis_CONTENT_TYPE) {
$result->xrds_uri = $result->normalized_uri;
} else {
$yadis_location = Auth_Yadis_Yadis::_getHeader($response->headers, array(Auth_Yadis_HEADER_NAME));
if (!$yadis_location) {
$parser = new Auth_Yadis_ParseHTML();
$yadis_location = $parser->getHTTPEquiv($response->body);
}
if ($yadis_location) {
$result->xrds_uri = $yadis_location;
$response = $fetcher->get($yadis_location);
if (!$response || ($response->status != 200 and $response->status != 206)) {
$result->fail();
return $result;
}
$result->content_type = Auth_Yadis_Yadis::_getHeader($response->headers, array('content-type'));
}
}
$result->response_text = $response->body;
return $result;
}
function test_is_xrds_neither()
{
$result = new Auth_Yadis_DiscoveryResult('http://request.uri/');
$result->normalized_uri = $result->xrds_uri = "http://normalized/";
$result->content_type = "another/content-type";
$this->assertTrue(!$result->isXRDS());
}
