/library/Http/Client/Adapter/Proxy.php
PHP | 284 lines | 132 code | 32 blank | 120 comment | 33 complexity | e87396e6ebcf087e63ab33f4ee3e5132 MD5 | raw file
- <?php
- /**
- * Zend Framework
- *
- * LICENSE
- *
- * This source file is subject to the new BSD license that is bundled
- * with this package in the file LICENSE.txt.
- * It is also available through the world-wide-web at this URL:
- * http://framework.zend.com/license/new-bsd
- * If you did not receive a copy of the license and are unable to
- * obtain it through the world-wide-web, please send an email
- * to license@zend.com so we can send you a copy immediately.
- *
- * @category Zend
- * @package Zend_Http
- * @subpackage Client_Adapter
- * @version $Id: Proxy.php 21792 2010-04-08 00:27:06Z stas $
- * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- */
- /**
- * @see Zend_Uri_Http
- */
- #require_once 'Zend/Uri/Http.php';
- /**
- * @see Zend_Http_Client
- */
- #require_once 'Zend/Http/Client.php';
- /**
- * @see Zend_Http_Client_Adapter_Socket
- */
- #require_once 'Zend/Http/Client/Adapter/Socket.php';
- /**
- * HTTP Proxy-supporting Zend_Http_Client adapter class, based on the default
- * socket based adapter.
- *
- * Should be used if proxy HTTP access is required. If no proxy is set, will
- * fall back to Zend_Http_Client_Adapter_Socket behavior. Just like the
- * default Socket adapter, this adapter does not require any special extensions
- * installed.
- *
- * @category Zend
- * @package Zend_Http
- * @subpackage Client_Adapter
- * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- */
- class Zend_Http_Client_Adapter_Proxy extends Zend_Http_Client_Adapter_Socket
- {
- /**
- * Parameters array
- *
- * @var array
- */
- protected $config = array(
- 'ssltransport' => 'ssl',
- 'sslcert' => null,
- 'sslpassphrase' => null,
- 'sslusecontext' => false,
- 'proxy_host' => '',
- 'proxy_port' => 8080,
- 'proxy_user' => '',
- 'proxy_pass' => '',
- 'proxy_auth' => Zend_Http_Client::AUTH_BASIC,
- 'persistent' => false
- );
- /**
- * Whether HTTPS CONNECT was already negotiated with the proxy or not
- *
- * @var boolean
- */
- protected $negotiated = false;
- /**
- * Connect to the remote server
- *
- * Will try to connect to the proxy server. If no proxy was set, will
- * fall back to the target server (behave like regular Socket adapter)
- *
- * @param string $host
- * @param int $port
- * @param boolean $secure
- */
- public function connect($host, $port = 80, $secure = false)
- {
- // If no proxy is set, fall back to Socket adapter
- if (! $this->config['proxy_host']) {
- return parent::connect($host, $port, $secure);
- }
-
- /* Url might require stream context even if proxy connection doesn't */
- if ($secure) {
- $this->config['sslusecontext'] = true;
- }
- // Connect (a non-secure connection) to the proxy server
- return parent::connect(
- $this->config['proxy_host'],
- $this->config['proxy_port'],
- false
- );
- }
- /**
- * Send request to the proxy server
- *
- * @param string $method
- * @param Zend_Uri_Http $uri
- * @param string $http_ver
- * @param array $headers
- * @param string $body
- * @return string Request as string
- */
- public function write($method, $uri, $http_ver = '1.1', $headers = array(), $body = '')
- {
- // If no proxy is set, fall back to default Socket adapter
- if (! $this->config['proxy_host']) return parent::write($method, $uri, $http_ver, $headers, $body);
- // Make sure we're properly connected
- if (! $this->socket) {
- #require_once 'Zend/Http/Client/Adapter/Exception.php';
- throw new Zend_Http_Client_Adapter_Exception("Trying to write but we are not connected");
- }
- $host = $this->config['proxy_host'];
- $port = $this->config['proxy_port'];
- if ($this->connected_to[0] != "tcp://$host" || $this->connected_to[1] != $port) {
- #require_once 'Zend/Http/Client/Adapter/Exception.php';
- throw new Zend_Http_Client_Adapter_Exception("Trying to write but we are connected to the wrong proxy server");
- }
- // Add Proxy-Authorization header
- if ($this->config['proxy_user'] && ! isset($headers['proxy-authorization'])) {
- $headers['proxy-authorization'] = Zend_Http_Client::encodeAuthHeader(
- $this->config['proxy_user'], $this->config['proxy_pass'], $this->config['proxy_auth']
- );
- }
- // if we are proxying HTTPS, preform CONNECT handshake with the proxy
- if ($uri->getScheme() == 'https' && (! $this->negotiated)) {
- $this->connectHandshake($uri->getHost(), $uri->getPort(), $http_ver, $headers);
- $this->negotiated = true;
- }
- // Save request method for later
- $this->method = $method;
- // Build request headers
- if ($this->negotiated) {
- $path = $uri->getPath();
- if ($uri->getQuery()) {
- $path .= '?' . $uri->getQuery();
- }
- $request = "$method $path HTTP/$http_ver\r\n";
- } else {
- $request = "$method $uri HTTP/$http_ver\r\n";
- }
- // Add all headers to the request string
- foreach ($headers as $k => $v) {
- if (is_string($k)) $v = "$k: $v";
- $request .= "$v\r\n";
- }
- if(is_resource($body)) {
- $request .= "\r\n";
- } else {
- // Add the request body
- $request .= "\r\n" . $body;
- }
-
- // Send the request
- if (! @fwrite($this->socket, $request)) {
- #require_once 'Zend/Http/Client/Adapter/Exception.php';
- throw new Zend_Http_Client_Adapter_Exception("Error writing request to proxy server");
- }
-
- if(is_resource($body)) {
- if(stream_copy_to_stream($body, $this->socket) == 0) {
- #require_once 'Zend/Http/Client/Adapter/Exception.php';
- throw new Zend_Http_Client_Adapter_Exception('Error writing request to server');
- }
- }
-
- return $request;
- }
- /**
- * Preform handshaking with HTTPS proxy using CONNECT method
- *
- * @param string $host
- * @param integer $port
- * @param string $http_ver
- * @param array $headers
- */
- protected function connectHandshake($host, $port = 443, $http_ver = '1.1', array &$headers = array())
- {
- $request = "CONNECT $host:$port HTTP/$http_ver\r\n" .
- "Host: " . $this->config['proxy_host'] . "\r\n";
- // Add the user-agent header
- if (isset($this->config['useragent'])) {
- $request .= "User-agent: " . $this->config['useragent'] . "\r\n";
- }
- // If the proxy-authorization header is set, send it to proxy but remove
- // it from headers sent to target host
- if (isset($headers['proxy-authorization'])) {
- $request .= "Proxy-authorization: " . $headers['proxy-authorization'] . "\r\n";
- unset($headers['proxy-authorization']);
- }
- $request .= "\r\n";
- // Send the request
- if (! @fwrite($this->socket, $request)) {
- #require_once 'Zend/Http/Client/Adapter/Exception.php';
- throw new Zend_Http_Client_Adapter_Exception("Error writing request to proxy server");
- }
- // Read response headers only
- $response = '';
- $gotStatus = false;
- while ($line = @fgets($this->socket)) {
- $gotStatus = $gotStatus || (strpos($line, 'HTTP') !== false);
- if ($gotStatus) {
- $response .= $line;
- if (!chop($line)) break;
- }
- }
- // Check that the response from the proxy is 200
- if (Zend_Http_Response::extractCode($response) != 200) {
- #require_once 'Zend/Http/Client/Adapter/Exception.php';
- throw new Zend_Http_Client_Adapter_Exception("Unable to connect to HTTPS proxy. Server response: " . $response);
- }
- // If all is good, switch socket to secure mode. We have to fall back
- // through the different modes
- $modes = array(
- STREAM_CRYPTO_METHOD_TLS_CLIENT,
- STREAM_CRYPTO_METHOD_SSLv3_CLIENT,
- STREAM_CRYPTO_METHOD_SSLv23_CLIENT,
- STREAM_CRYPTO_METHOD_SSLv2_CLIENT
- );
- $success = false;
- foreach($modes as $mode) {
- $success = stream_socket_enable_crypto($this->socket, true, $mode);
- if ($success) break;
- }
- if (! $success) {
- #require_once 'Zend/Http/Client/Adapter/Exception.php';
- throw new Zend_Http_Client_Adapter_Exception("Unable to connect to" .
- " HTTPS server through proxy: could not negotiate secure connection.");
- }
- }
- /**
- * Close the connection to the server
- *
- */
- public function close()
- {
- parent::close();
- $this->negotiated = false;
- }
- /**
- * Destructor: make sure the socket is disconnected
- *
- */
- public function __destruct()
- {
- if ($this->socket) $this->close();
- }
- }