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diff --git a/application/libraries/Auth/Yadis/Yadis.php b/application/libraries/Auth/Yadis/Yadis.php
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+++ b/application/libraries/Auth/Yadis/Yadis.php
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+
+ * @copyright 2005-2008 Janrain, Inc.
+ * @license http://www.apache.org/licenses/LICENSE-2.0 Apache
+ */
+
+/**
+ * Need both fetcher types so we can use the right one based on the
+ * presence or absence of CURL.
+ */
+require_once "Auth/Yadis/PlainHTTPFetcher.php";
+require_once "Auth/Yadis/ParanoidHTTPFetcher.php";
+
+/**
+ * Need this for parsing HTML (looking for META tags).
+ */
+require_once "Auth/Yadis/ParseHTML.php";
+
+/**
+ * Need this to parse the XRDS document during Yadis discovery.
+ */
+require_once "Auth/Yadis/XRDS.php";
+
+/**
+ * XRDS (yadis) content type
+ */
+define('Auth_Yadis_CONTENT_TYPE', 'application/xrds+xml');
+
+/**
+ * Yadis header
+ */
+define('Auth_Yadis_HEADER_NAME', 'X-XRDS-Location');
+
+/**
+ * Contains the result of performing Yadis discovery on a URI.
+ *
+ * @package OpenID
+ */
+class Auth_Yadis_DiscoveryResult {
+
+ // The URI that was passed to the fetcher
+ var $request_uri = null;
+
+ // The result of following redirects from the request_uri
+ var $normalized_uri = null;
+
+ // The URI from which the response text was returned (set to
+ // None if there was no XRDS document found)
+ var $xrds_uri = null;
+
+ var $xrds = null;
+
+ // The content-type returned with the response_text
+ var $content_type = null;
+
+ // The document returned from the xrds_uri
+ var $response_text = null;
+
+ // Did the discovery fail miserably?
+ var $failed = false;
+
+ function Auth_Yadis_DiscoveryResult($request_uri)
+ {
+ // Initialize the state of the object
+ // sets all attributes to None except the request_uri
+ $this->request_uri = $request_uri;
+ }
+
+ function fail()
+ {
+ $this->failed = true;
+ }
+
+ function isFailure()
+ {
+ return $this->failed;
+ }
+
+ /**
+ * Returns the list of service objects as described by the XRDS
+ * document, if this yadis object represents a successful Yadis
+ * discovery.
+ *
+ * @return array $services An array of {@link Auth_Yadis_Service}
+ * objects
+ */
+ function services()
+ {
+ if ($this->xrds) {
+ return $this->xrds->services();
+ }
+
+ return null;
+ }
+
+ function usedYadisLocation()
+ {
+ // Was the Yadis protocol's indirection used?
+ return ($this->xrds_uri && $this->normalized_uri != $this->xrds_uri);
+ }
+
+ function isXRDS()
+ {
+ // Is the response text supposed to be an XRDS document?
+ return ($this->usedYadisLocation() ||
+ $this->content_type == Auth_Yadis_CONTENT_TYPE);
+ }
+}
+
+/**
+ *
+ * Perform the Yadis protocol on the input URL and return an iterable
+ * of resulting endpoint objects.
+ *
+ * input_url: The URL on which to perform the Yadis protocol
+ *
+ * @return: The normalized identity URL and an iterable of endpoint
+ * objects generated by the filter function.
+ *
+ * xrds_parse_func: a callback which will take (uri, xrds_text) and
+ * return an array of service endpoint objects or null. Usually
+ * array('Auth_OpenID_ServiceEndpoint', 'fromXRDS').
+ *
+ * discover_func: if not null, a callback which should take (uri) and
+ * return an Auth_Yadis_Yadis object or null.
+ */
+function Auth_Yadis_getServiceEndpoints($input_url, $xrds_parse_func,
+ $discover_func=null, $fetcher=null)
+{
+ if ($discover_func === null) {
+ $discover_function = array('Auth_Yadis_Yadis', 'discover');
+ }
+
+ $yadis_result = call_user_func_array($discover_func,
+ array($input_url, $fetcher));
+
+ if ($yadis_result === null) {
+ return array($input_url, array());
+ }
+
+ $endpoints = call_user_func_array($xrds_parse_func,
+ array($yadis_result->normalized_uri,
+ $yadis_result->response_text));
+
+ if ($endpoints === null) {
+ $endpoints = array();
+ }
+
+ return array($yadis_result->normalized_uri, $endpoints);
+}
+
+/**
+ * This is the core of the PHP Yadis library. This is the only class
+ * a user needs to use to perform Yadis discovery. This class
+ * performs the discovery AND stores the result of the discovery.
+ *
+ * First, require this library into your program source:
+ *
+ * require_once "Auth/Yadis/Yadis.php";
+ *
+ * To perform Yadis discovery, first call the "discover" method
+ * statically with a URI parameter:
+ *
+ * $http_response = array();
+ * $fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
+ * $yadis_object = Auth_Yadis_Yadis::discover($uri,
+ * $http_response, $fetcher);
+ *
+ * If the discovery succeeds, $yadis_object will be an instance of
+ * {@link Auth_Yadis_Yadis}. If not, it will be null. The XRDS
+ * document found during discovery should have service descriptions,
+ * which can be accessed by calling
+ *
+ * $service_list = $yadis_object->services();
+ *
+ * which returns an array of objects which describe each service.
+ * These objects are instances of Auth_Yadis_Service. Each object
+ * describes exactly one whole Service element, complete with all of
+ * its Types and URIs (no expansion is performed). The common use
+ * case for using the service objects returned by services() is to
+ * write one or more filter functions and pass those to services():
+ *
+ * $service_list = $yadis_object->services(
+ * array("filterByURI",
+ * "filterByExtension"));
+ *
+ * The filter functions (whose names appear in the array passed to
+ * services()) take the following form:
+ *
+ * function myFilter($service) {
+ * // Query $service object here. Return true if the service
+ * // matches your query; false if not.
+ * }
+ *
+ * This is an example of a filter which uses a regular expression to
+ * match the content of URI tags (note that the Auth_Yadis_Service
+ * class provides a getURIs() method which you should use instead of
+ * this contrived example):
+ *
+ *
+ * function URIMatcher($service) {
+ * foreach ($service->getElements('xrd:URI') as $uri) {
+ * if (preg_match("/some_pattern/",
+ * $service->parser->content($uri))) {
+ * return true;
+ * }
+ * }
+ * return false;
+ * }
+ *
+ * The filter functions you pass will be called for each service
+ * object to determine which ones match the criteria your filters
+ * specify. The default behavior is that if a given service object
+ * matches ANY of the filters specified in the services() call, it
+ * will be returned. You can specify that a given service object will
+ * be returned ONLY if it matches ALL specified filters by changing
+ * the match mode of services():
+ *
+ * $yadis_object->services(array("filter1", "filter2"),
+ * SERVICES_YADIS_MATCH_ALL);
+ *
+ * See {@link SERVICES_YADIS_MATCH_ALL} and {@link
+ * SERVICES_YADIS_MATCH_ANY}.
+ *
+ * Services described in an XRDS should have a library which you'll
+ * probably be using. Those libraries are responsible for defining
+ * filters that can be used with the "services()" call. If you need
+ * to write your own filter, see the documentation for {@link
+ * Auth_Yadis_Service}.
+ *
+ * @package OpenID
+ */
+class Auth_Yadis_Yadis {
+
+ /**
+ * Returns an HTTP fetcher object. If the CURL extension is
+ * present, an instance of {@link Auth_Yadis_ParanoidHTTPFetcher}
+ * is returned. If not, an instance of
+ * {@link Auth_Yadis_PlainHTTPFetcher} is returned.
+ *
+ * If Auth_Yadis_CURL_OVERRIDE is defined, this method will always
+ * return a {@link Auth_Yadis_PlainHTTPFetcher}.
+ */
+ static function getHTTPFetcher($timeout = 20)
+ {
+ if (Auth_Yadis_Yadis::curlPresent() &&
+ (!defined('Auth_Yadis_CURL_OVERRIDE'))) {
+ $fetcher = new Auth_Yadis_ParanoidHTTPFetcher($timeout);
+ } else {
+ $fetcher = new Auth_Yadis_PlainHTTPFetcher($timeout);
+ }
+ return $fetcher;
+ }
+
+ static function curlPresent()
+ {
+ return function_exists('curl_init');
+ }
+
+ /**
+ * @access private
+ */
+ static function _getHeader($header_list, $names)
+ {
+ foreach ($header_list as $name => $value) {
+ foreach ($names as $n) {
+ if (strtolower($name) == strtolower($n)) {
+ return $value;
+ }
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * @access private
+ */
+ static function _getContentType($content_type_header)
+ {
+ if ($content_type_header) {
+ $parts = explode(";", $content_type_header);
+ return strtolower($parts[0]);
+ }
+ }
+
+ /**
+ * 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 $obj Either null or an instance of
+ * Auth_Yadis_Yadis, depending on whether the discovery
+ * succeeded.
+ */
+ static function discover($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;
+ }
+}
+
+