-<?php
-// Own namespace
-namespace CoreFramework\Client\Http;
-
-/**
- * A HTTP client class
- *
- * @author Roland Haeder <webmaster@ship-simu.org>
- * @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 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__, __LINE__)->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;
- }
-
-}
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