55      * Return whether a URL can be fetched.  Returns false if the URL
59      * @param string $url
62     function canFetchURL($url)  argument
64         if ($this->isHTTPS($url) && !$this->supportsSSL()) {
65             Auth_OpenID::log("HTTPS URL unsupported fetching %s",
66                              $url);
70         if (!$this->allowedURL($url)) {
71             Auth_OpenID::log("URL fetching not allowed for '%s'",
72                              $url);
80      * Return whether a URL should be allowed. Override this method to
83      * By default, will attempt to fetch any http or https URL.
85      * @param string $url
88     function allowedURL($url)  argument
90         return $this->URLHasAllowedScheme($url);
107      * Is this an https URL?
110      * @param string $url
113     function isHTTPS($url)  argument
115         return (bool)preg_match('/^https:\/\//i', $url);
119      * Is this an http or https URL?
122      * @param string $url
125     function URLHasAllowedScheme($url)  argument
127         return (bool)preg_match('/^https?:\/\//i', $url);
133      * @param string $url
136     function _findRedirect($headers, $url)  argument
145                   $hpos = strpos($url, "://");
146                   $prt = substr($url, 0, $hpos+3);
147                   $url = substr($url, $hpos+3);
150                     $fspos = strpos($url, "/");
151                     if ($fspos) $loc = $prt.substr($url, 0, $fspos).$loc;
152                     else $loc = $prt.$url.$loc;
157                       $xpos = strpos($url, "/");
159                       $apos = strpos($url, "?");
161                       $apos = strpos($url, "&");
163                       $pp .= substr($url, 0, $xpos+1);
164                       $url = substr($url, $xpos+1);
176      * Fetches the specified URL using optional extra headers and
179      * @param string $url The URL to be fetched.
183     function get($url, $headers = null)  argument