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<?php
namespace CloudflareBypass\RequestMethod;
class CFStream extends \CloudflareBypass\CFCore
{
/**
* Given a URL and a context (stream / array), if URL is protected by the Cloudflare,
* this method will add the "__cfduid" and "cf_clearance" cookies to the "Cookie" header
* (or update them if they exist).
*
* @access public
* @param string $url Request URL
* @param mixed $context Stream / array of context options
* @param resource $stream Stream context; used in retry process (DONT MODIFY)
* @param bool $root_scope Used in retry process (DON'T MODIFY)
* @param integer $retry Used in retry process (DON'T MODIFY)
* @throws \ErrorException if $url is not a valid URL
* @throws \ErrorException if $context if not valid context
* @return resource $context
*/
public function create($url, $context, $stream = null, $root_scope = true, $retry = 1)
{
if ($root_scope) {
// Extract array if context is a resource.
if (is_resource($context)) {
$context = stream_context_get_options($context);
}
$stream = new StreamContext($url, $context);
// Check if clearance tokens exists in a cache file.
if (isset($this->cache) && $this->cache) {
$components = parse_url($url);
if (($cached = $this->cache->fetch($components['host'])) !== false) {
// Set clearance tokens.
foreach ($cached as $cookie => $val) {
$stream->setCookie($cookie, $val);
}
}
}
}
// Request original page.
$response = $stream->fileGetContents();
$response_info = array(
'http_code' => $stream->getResponseHeader('http_code')
);
if ($root_scope) {
// Check if page is protected by Cloudflare.
if (!$this->isProtected($response, $response_info)) {
return $stream;
}
/*
* 1. Check if user agent is set in context
*/
if (!$stream->getRequestHeader('User-Agent')) {
throw new \ErrorException('User agent needs to be set in context!');
}
/*
* 2. Extract "__cfuid" cookie
*/
if (!($cfduid_cookie = $stream->getCookie('__cfduid'))) {
return $stream;
}
// Clone streamcontext object handle.
$stream_copy = $stream->copyHandle();
$stream_copy->setCookie('__cfduid', $cfduid_cookie);
} else {
// Not in root scope so $stream is a clone.
$stream_copy = $stream;
}
/*
* 3. Solve challenge and request clearance link
*/
if (!($cfclearance_cookie = $stream_copy->getCookie('cf_clearance'))) {
$stream_copy->setURL($this->getClearanceLink($response, $url));
$stream_copy->setHttpContextOption('follow_location', 1);
// GET clearance link.
$stream_copy->setHttpContextOption('method', 'GET');
$stream_copy->fileGetContents();
/*
* 4. Extract "cf_clearance" cookie
*/
if (!($cfclearance_cookie = $stream_copy->getCookie('cf_clearance'))) {
if ($retry > $this->max_retries) {
throw new \ErrorException("Exceeded maximum retries trying to get CF clearance!");
}
$cfclearance_cookie = $this->create($url, false, $stream_copy, false, $retry+1);
}
}
if (!$root_scope) {
return $cfclearance_cookie;
}
if (isset($this->cache) && $this->cache) {
$cookies = array();
$components = parse_url($url);
foreach ($stream_copy->getCookies() as $cookie => $val) {
$cookies[$cookie] = $val;
}
// Store clearance tokens in cache.
$this->cache->store($components['host'], $cookies);
}
/*
* 5. Set "__cfduid" and "cf_clearance" in original stream
*/
$stream->setCookie('__cfduid', $cfduid_cookie);
$stream->setCookie('cf_clearance', $cfclearance_cookie);
$stream->updateContext();
return $stream;
}
}