--- /dev/null
+<?php
+/**
+ * A HTTP client class
+ *
+ * @author Roland Haeder <webmaster@ship-simu.org>
+ * @version 0.0.0
+ * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2016 Core Developer Team
+ * @license GNU GPL 3.0 or any newer version
+ * @link http://www.ship-simu.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+class HttpClient extends BaseClient implements Client {
+ // Constants
+ const HTTP_EOL = "\r\n";
+ const HTTP_USER_AGENT = 'HttpClient-Core/1.0';
+
+ /**
+ * Protected constructor
+ *
+ * @return void
+ */
+ protected function __construct () {
+ // Set default user agent string (to allow other classes to override this)
+ $this->setUserAgent(self::HTTP_USER_AGENT);
+
+ // Call parent constructor
+ parent::__construct(__CLASS__);
+ }
+
+ /**
+ * Creates an instance of this Client class and prepares it for usage
+ *
+ * @param $socketResource Resource of a socket (optional)
+ * @return $clientInstance An instance of a Client class
+ */
+ public final static function createHttpClient ($socketResouce = FALSE) {
+ // Get a new instance
+ $clientInstance = new HttpClient();
+
+ // Set socket resource
+ $clientInstance->setSocketResource($socketResource);
+
+ // Return the prepared instance
+ return $clientInstance;
+ }
+
+ /**
+ * Checks wether proxy configuration is used
+ *
+ * @return $isUsed Wether proxy is used
+ */
+ protected function isProxyUsed () {
+ // Do we have cache?
+ if (!isset($GLOBALS[__METHOD__])) {
+ // Determine it
+ $GLOBALS[__METHOD__] = (($this->getConfigInstance()->getConfigEntry('proxy_host') != '') && ($this->getConfigInstance()->getConfigEntry('proxy_port') > 0));
+ } // END - if
+
+ // Return cache
+ return $GLOBALS[__METHOD__];
+ }
+
+ /**
+ * Sets up a proxy tunnel for given hostname and through resource
+ *
+ * @param $host Host to connect to
+ * @param $port Port number to connect to
+ * @return $response Response array
+ */
+ protected function setupProxyTunnel ($host, $port) {
+ // Initialize array
+ $response = array('', '', '');
+
+ // Do the connect
+ $respArray = $this->doConnectRequest($host, $port);
+
+ // Analyze first header line
+ if (((strtolower($respArray[0]) !== 'http/1.0') && (strtolower($respArray[0]) !== 'http/1.1')) || ($respArray[1] != '200')) {
+ // Response code is not 200
+ return $response;
+ } // END - if
+
+ // All fine!
+ return $respArray;
+ }
+
+ /**
+ * Sends a raw HTTP request out to given IP/host and port number
+ *
+ * @param $method Request method (GET, POST, HEAD, CONNECT, ...)
+ * @param $host Host to connect to
+ * @param $port Port number to connect to
+ * @return $responseArray Array with raw response
+ */
+ private function sendRawHttpRequest ($method, $host, $port, array $header = array()) {
+ // Minimum raw HTTP/1.1 request
+ $rawRequest = $method . ' ' . $host . ':' . $port . ' HTTP/1.1' . self::HTTP_EOL;
+ $rawRequest .= 'Host: ' . $host . ':' . $port . self::HTTP_EOL;
+
+ // Use login data to proxy? (username at least)
+ if ($this->getConfigInstance()->getConfigEntry('proxy_username') != '') {
+ // Add it as well
+ $encodedAuth = base64_encode($this->getConfigInstance()->getConfigEntry('proxy_username') . ':' . $this->getConfigInstance()->getConfigEntry('proxy_password'));
+ $rawRequest .= 'Proxy-Authorization: Basic ' . $encodedAuth . self::HTTP_EOL;
+ } // END - if
+
+ // Add last new-line
+ $rawRequest .= self::HTTP_EOL;
+ //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('HTTP-CLIENT[' . __METHOD__ . ':' . __LINE__ . ']: rawRequest=' . $rawRequest);
+
+ // Write request
+ fwrite($this->getSocketResource(), $rawRequest);
+
+ // Got response?
+ if (feof($this->getSocketResource())) {
+ // No response received
+ return $response;
+ } // END - if
+
+ // Read the first line
+ $resp = trim(fgets($this->getSocketResource(), 10240));
+
+ // "Explode" the string to an array
+ $responseArray = explode(' ', $resp);
+
+ // And return it
+ return $responseArray;
+ }
+
+ /**
+ * A HTTP/1.1 CONNECT request
+ *
+ * @param $host Host to connect to
+ * @param $port Port number to connect to
+ * @return $responseArray An array with the read response
+ */
+ public function doConnectRequest ($host, $port) {
+ // Prepare extra header(s)
+ $headers = array(
+ 'Proxy-Connection' => 'Keep-Alive'
+ );
+
+ // Prepare raw request
+ $responseArray = $this->sendRawHttpRequest('CONNECT', $host, $port, $headers);
+
+ // Return response array
+ return $responseArray;
+ }
+}
+
+// [EOF]
+?>
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