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