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<?php
/**
* This is a PHP library that handles calling reCAPTCHA.
*
* BSD 3-Clause License
* @copyright (c) 2019, Google Inc.
* @link https://www.google.com/recaptcha
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
namespace ReCaptcha\RequestMethod;
use ReCaptcha\ReCaptcha;
use ReCaptcha\RequestMethod;
use ReCaptcha\RequestParameters;
/**
* Sends a POST request to the reCAPTCHA service, but makes use of fsockopen()
* instead of get_file_contents(). This is to account for people who may be on
* servers where allow_url_open is disabled.
*/
class SocketPost implements RequestMethod
{
/**
* Socket to the reCAPTCHA service
* @var Socket
*/
private $socket;
private $siteVerifyUrl;
/**
* Only needed if you want to override the defaults
*
* @param \ReCaptcha\RequestMethod\Socket $socket optional socket, injectable for testing
* @param string $siteVerifyUrl URL for reCAPTCHA siteverify API
*/
public function __construct(Socket $socket = null, $siteVerifyUrl = null)
{
$this->socket = (is_null($socket)) ? new Socket() : $socket;
$this->siteVerifyUrl = (is_null($siteVerifyUrl)) ? ReCaptcha::SITE_VERIFY_URL : $siteVerifyUrl;
}
/**
* Submit the POST request with the specified parameters.
*
* @param RequestParameters $params Request parameters
* @return string Body of the reCAPTCHA response
*/
public function submit(RequestParameters $params)
{
$errno = 0;
$errstr = '';
$urlParsed = parse_url($this->siteVerifyUrl);
if (false === $this->socket->fsockopen('ssl://' . $urlParsed['host'], 443, $errno, $errstr, 30)) {
return '{"success": false, "error-codes": ["'.ReCaptcha::E_CONNECTION_FAILED.'"]}';
}
$content = $params->toQueryString();
$request = "POST " . $urlParsed['path'] . " HTTP/1.0\r\n";
$request .= "Host: " . $urlParsed['host'] . "\r\n";
$request .= "Content-Type: application/x-www-form-urlencoded\r\n";
$request .= "Content-length: " . strlen($content) . "\r\n";
$request .= "Connection: close\r\n\r\n";
$request .= $content . "\r\n\r\n";
$this->socket->fwrite($request);
$response = '';
while (!$this->socket->feof()) {
$response .= $this->socket->fgets(4096);
}
$this->socket->fclose();
if (0 !== strpos($response, 'HTTP/1.0 200 OK')) {
return '{"success": false, "error-codes": ["'.ReCaptcha::E_BAD_RESPONSE.'"]}';
}
$parts = preg_split("#\n\s*\n#Uis", $response);
return $parts[1];
}
}
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