+ $oprofile = self::getFromProfileURL($profile_url);
+
+ if (!empty($oprofile)) {
+ return $oprofile;
+ }
+
+ $hints['profileurl'] = $profile_url;
+
+ // Fetch the URL
+ // XXX: HTTP caching
+
+ $client = new HTTPClient();
+ $client->setHeader('Accept', 'text/html,application/xhtml+xml');
+ $response = $client->get($profile_url);
+
+ if (!$response->isOk()) {
+ return null;
+ }
+
+ // Check if we have a non-canonical URL
+
+ $finalUrl = $response->getUrl();
+
+ if ($finalUrl != $profile_url) {
+
+ $hints['profileurl'] = $finalUrl;
+
+ $oprofile = self::getFromProfileURL($finalUrl);
+
+ if (!empty($oprofile)) {
+ return $oprofile;
+ }
+ }
+
+ // Try to get some hCard data
+
+ $body = $response->getBody();
+
+ $hcardHints = DiscoveryHints::hcardHints($body, $finalUrl);
+
+ if (!empty($hcardHints)) {
+ $hints = array_merge($hints, $hcardHints);
+ }
+
+ // Check if they've got an LRDD header
+
+ $lrdd = LinkHeader::getLink($response, 'lrdd', 'application/xrd+xml');
+
+ if (!empty($lrdd)) {
+
+ $xrd = Discovery::fetchXrd($lrdd);
+ $xrdHints = DiscoveryHints::fromXRD($xrd);
+
+ $hints = array_merge($hints, $xrdHints);
+ }
+
+ // If discovery found a feedurl (probably from LRDD), use it.
+
+ if (array_key_exists('feedurl', $hints)) {
+ return self::ensureFeedURL($hints['feedurl'], $hints);
+ }
+
+ // Get the feed URL from HTML
+