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<?php
/**
* This module contains the HTTP fetcher interface
*
* PHP versions 4 and 5
*
* LICENSE: See the COPYING file included in this distribution.
*
* @package OpenID
* @author JanRain, Inc. <openid@janrain.com>
* @copyright 2005-2008 Janrain, Inc.
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache
*/
/**
* Require logging functionality
*/
require_once "Auth/OpenID.php";
define('Auth_OpenID_FETCHER_MAX_RESPONSE_KB', 1024);
define('Auth_OpenID_USER_AGENT',
'php-openid/'.Auth_OpenID_VERSION.' (php/'.phpversion().')');
class Auth_Yadis_HTTPResponse {
function __construct($final_url = null, $status = null,
$headers = null, $body = null)
{
$this->final_url = $final_url;
$this->status = $status;
$this->headers = $headers;
$this->body = $body;
}
}
/**
* This class is the interface for HTTP fetchers the Yadis library
* uses. This interface is only important if you need to write a new
* fetcher for some reason.
*
* @access private
* @package OpenID
*/
class Auth_Yadis_HTTPFetcher {
var $timeout = 20; // timeout in seconds.
/**
* Return whether a URL can be fetched. Returns false if the URL
* scheme is not allowed or is not supported by this fetcher
* implementation; returns true otherwise.
*
* @return bool
*/
function canFetchURL($url)
{
if ($this->isHTTPS($url) && !$this->supportsSSL()) {
Auth_OpenID::log("HTTPS URL unsupported fetching %s",
$url);
return false;
}
if (!$this->allowedURL($url)) {
Auth_OpenID::log("URL fetching not allowed for '%s'",
$url);
return false;
}
return true;
}
/**
* Return whether a URL should be allowed. Override this method to
* conform to your local policy.
*
* By default, will attempt to fetch any http or https URL.
*/
function allowedURL($url)
{
return $this->URLHasAllowedScheme($url);
}
/**
* Does this fetcher implementation (and runtime) support fetching
* HTTPS URLs? May inspect the runtime environment.
*
* @return bool $support True if this fetcher supports HTTPS
* fetching; false if not.
*/
function supportsSSL()
{
trigger_error("not implemented", E_USER_ERROR);
}
/**
* Is this an https URL?
*
* @access private
*/
function isHTTPS($url)
{
return (bool)preg_match('/^https:\/\//i', $url);
}
/**
* Is this an http or https URL?
*
* @access private
*/
function URLHasAllowedScheme($url)
{
return (bool)preg_match('/^https?:\/\//i', $url);
}
/**
* @access private
*/
function _findRedirect($headers, $url)
{
foreach ($headers as $line) {
if (strpos(strtolower($line), "location: ") === 0) {
$parts = explode(" ", $line, 2);
$loc = $parts[1];
$ppos = strpos($loc, "://");
if ($ppos === false || $ppos > strpos($loc, "/")) {
/* no host; add it */
$hpos = strpos($url, "://");
$prt = substr($url, 0, $hpos+3);
$url = substr($url, $hpos+3);
if (substr($loc, 0, 1) == "/") {
/* absolute path */
$fspos = strpos($url, "/");
if ($fspos) $loc = $prt.substr($url, 0, $fspos).$loc;
else $loc = $prt.$url.$loc;
} else {
/* relative path */
$pp = $prt;
while (1) {
$xpos = strpos($url, "/");
if ($xpos === false) break;
$apos = strpos($url, "?");
if ($apos !== false && $apos < $xpos) break;
$apos = strpos($url, "&");
if ($apos !== false && $apos < $xpos) break;
$pp .= substr($url, 0, $xpos+1);
$url = substr($url, $xpos+1);
}
$loc = $pp.$loc;
}
}
return $loc;
}
}
return null;
}
/**
* Fetches the specified URL using optional extra headers and
* returns the server's response.
*
* @param string $url The URL to be fetched.
* @param array $extra_headers An array of header strings
* (e.g. "Accept: text/html").
* @return mixed $result An array of ($code, $url, $headers,
* $body) if the URL could be fetched; null if the URL does not
* pass the URLHasAllowedScheme check or if the server's response
* is malformed.
*/
function get($url, $headers = null)
{
trigger_error("not implemented", E_USER_ERROR);
}
}
|
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