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<?php
/**
* This module contains the CURL-based HTTP fetcher implementation.
*
* PHP versions 4 and 5
*
* LICENSE: See the COPYING file included in this distribution.
*
* @package Yadis
* @author JanRain, Inc. <openid@janrain.com>
* @copyright 2005 Janrain, Inc.
* @license http://www.gnu.org/copyleft/lesser.html LGPL
*/
/**
* Interface import
*/
require_once "Auth/Yadis/HTTPFetcher.php";
/**
* A paranoid {@link Auth_Yadis_HTTPFetcher} class which uses CURL
* for fetching.
*
* @package Yadis
*/
class Auth_Yadis_ParanoidHTTPFetcher extends Auth_Yadis_HTTPFetcher {
function Auth_Yadis_ParanoidHTTPFetcher()
{
$this->reset();
}
function reset()
{
$this->headers = array();
$this->data = "";
}
/**
* @access private
*/
function _writeHeader($ch, $header)
{
array_push($this->headers, rtrim($header));
return strlen($header);
}
/**
* @access private
*/
function _writeData($ch, $data)
{
$this->data .= $data;
return strlen($data);
}
function get($url, $extra_headers = null)
{
$stop = time() + $this->timeout;
$off = $this->timeout;
$redir = true;
while ($redir && ($off > 0)) {
$this->reset();
$c = curl_init();
if (defined('CURLOPT_NOSIGNAL')) {
curl_setopt($c, CURLOPT_NOSIGNAL, true);
}
if (!$this->allowedURL($url)) {
trigger_error(sprintf("Fetching URL not allowed: %s", $url),
E_USER_WARNING);
return null;
}
curl_setopt($c, CURLOPT_WRITEFUNCTION,
array(&$this, "_writeData"));
curl_setopt($c, CURLOPT_HEADERFUNCTION,
array(&$this, "_writeHeader"));
if ($extra_headers) {
curl_setopt($c, CURLOPT_HTTPHEADER, $extra_headers);
}
curl_setopt($c, CURLOPT_TIMEOUT, $off);
curl_setopt($c, CURLOPT_URL, $url);
curl_exec($c);
$code = curl_getinfo($c, CURLINFO_HTTP_CODE);
$body = $this->data;
$headers = $this->headers;
if (!$code) {
return null;
}
if (in_array($code, array(301, 302, 303, 307))) {
$url = $this->_findRedirect($headers);
$redir = true;
} else {
$redir = false;
curl_close($c);
$new_headers = array();
foreach ($headers as $header) {
if (preg_match("/:/", $header)) {
list($name, $value) = explode(": ", $header, 2);
$new_headers[$name] = $value;
}
}
return new Auth_Yadis_HTTPResponse($url, $code,
$new_headers, $body);
}
$off = $stop - time();
}
trigger_error(sprintf("Timed out fetching: %s", $url),
E_USER_WARNING);
return null;
}
function post($url, $body)
{
$this->reset();
if (!$this->allowedURL($url)) {
trigger_error(sprintf("Fetching URL not allowed: %s", $url),
E_USER_WARNING);
return null;
}
$c = curl_init();
curl_setopt($c, CURLOPT_NOSIGNAL, true);
curl_setopt($c, CURLOPT_POST, true);
curl_setopt($c, CURLOPT_POSTFIELDS, $body);
curl_setopt($c, CURLOPT_TIMEOUT, $this->timeout);
curl_setopt($c, CURLOPT_URL, $url);
curl_setopt($c, CURLOPT_WRITEFUNCTION,
array(&$this, "_writeData"));
curl_exec($c);
$code = curl_getinfo($c, CURLINFO_HTTP_CODE);
if (!$code) {
trigger_error("No HTTP code returned", E_USER_WARNING);
return null;
}
$body = $this->data;
curl_close($c);
$new_headers = array();
foreach ($this->headers as $header) {
if (preg_match("/:/", $header)) {
list($name, $value) = explode(": ", $header, 2);
$new_headers[$name] = $value;
}
}
return new Auth_Yadis_HTTPResponse($url, $code,
$new_headers, $body);
}
}
?>
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