1 files changed, 108 insertions, 0 deletions
diff --git a/includes/recaptcha/ReCaptcha/RequestMethod/SocketPost.php b/includes/recaptcha/ReCaptcha/RequestMethod/SocketPost.php
new file mode 100644
index 0000000..464bc28
--- /dev/null
+++ b/includes/recaptcha/ReCaptcha/RequestMethod/SocketPost.php
@@ -0,0 +1,108 @@
+<?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;
+
+    /**
+     * 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];
+    }
+}