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- 28.08.2024
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SocketPost.php
001 <?php
002 /**
003 * This is a PHP library that handles calling reCAPTCHA.
004 *
005 * BSD 3-Clause License
006 * @copyright (c) 2019, Google Inc.
007 * @link https://www.google.com/recaptcha
008 * All rights reserved.
009 *
010 * Redistribution and use in source and binary forms, with or without
011 * modification, are permitted provided that the following conditions are met:
012 * 1. Redistributions of source code must retain the above copyright notice, this
013 * list of conditions and the following disclaimer.
014 *
015 * 2. Redistributions in binary form must reproduce the above copyright notice,
016 * this list of conditions and the following disclaimer in the documentation
017 * and/or other materials provided with the distribution.
018 *
019 * 3. Neither the name of the copyright holder nor the names of its
020 * contributors may be used to endorse or promote products derived from
021 * this software without specific prior written permission.
022 *
023 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
024 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
025 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
026 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
027 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
028 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
029 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
030 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
031 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
032 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
033 */
034
035 namespace ReCaptcha\RequestMethod;
036
037 use ReCaptcha\ReCaptcha;
038 use ReCaptcha\RequestMethod;
039 use ReCaptcha\RequestParameters;
040
041 /**
042 * Sends a POST request to the reCAPTCHA service, but makes use of fsockopen()
043 * instead of get_file_contents(). This is to account for people who may be on
044 * servers where allow_url_open is disabled.
045 */
046 class SocketPost implements RequestMethod
047 {
048 /**
049 * Socket to the reCAPTCHA service
050 * @var Socket
051 */
052 private $socket;
053
054 /**
055 * Only needed if you want to override the defaults
056 *
057 * @param \ReCaptcha\RequestMethod\Socket $socket optional socket, injectable for testing
058 * @param string $siteVerifyUrl URL for reCAPTCHA siteverify API
059 */
060 public function __construct(Socket $socket = null, $siteVerifyUrl = null)
061 {
062 $this->socket = (is_null($socket)) ? new Socket() : $socket;
063 $this->siteVerifyUrl = (is_null($siteVerifyUrl)) ? ReCaptcha::SITE_VERIFY_URL : $siteVerifyUrl;
064 }
065
066 /**
067 * Submit the POST request with the specified parameters.
068 *
069 * @param RequestParameters $params Request parameters
070 * @return string Body of the reCAPTCHA response
071 */
072 public function submit(RequestParameters $params)
073 {
074 $errno = 0;
075 $errstr = '';
076 $urlParsed = parse_url($this->siteVerifyUrl);
077
078 if (false === $this->socket->fsockopen('ssl://' . $urlParsed['host'], 443, $errno, $errstr, 30)) {
079 return '{"success": false, "error-codes": ["'.ReCaptcha::E_CONNECTION_FAILED.'"]}';
080 }
081
082 $content = $params->toQueryString();
083
084 $request = "POST " . $urlParsed['path'] . " HTTP/1.0\r\n";
085 $request .= "Host: " . $urlParsed['host'] . "\r\n";
086 $request .= "Content-Type: application/x-www-form-urlencoded\r\n";
087 $request .= "Content-length: " . strlen($content) . "\r\n";
088 $request .= "Connection: close\r\n\r\n";
089 $request .= $content . "\r\n\r\n";
090
091 $this->socket->fwrite($request);
092 $response = '';
093
094 while (!$this->socket->feof()) {
095 $response .= $this->socket->fgets(4096);
096 }
097
098 $this->socket->fclose();
099
100 if (0 !== strpos($response, 'HTTP/1.0 200 OK')) {
101 return '{"success": false, "error-codes": ["'.ReCaptcha::E_BAD_RESPONSE.'"]}';
102 }
103
104 $parts = preg_split("#\n\s*\n#Uis", $response);
105
106 return $parts[1];
107 }
108 }
109