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1 files changed, 343 insertions, 0 deletions

diff --git a/zend/library/Zend/Http/Client/Adapter/Proxy.php b/zend/library/Zend/Http/Client/Adapter/Proxy.php
new file mode 100644
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+++ b/zend/library/Zend/Http/Client/Adapter/Proxy.php
@@ -0,0 +1,343 @@
+<?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 25273 2013-03-06 08:02:21Z frosch $
+ * @copyright  Copyright (c) 2005-2012 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) 2005-2012 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;
+    
+    /**
+     * Stores the last CONNECT handshake request
+     * 
+     * @var string
+     */
+    protected $connectHandshakeRequest;
+
+    /**
+     * 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
+     * @throws Zend_Http_Client_Adapter_Exception
+     */
+    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']) {
+            // Check to see if one already exists
+            $hasProxyAuthHeader = false;
+            foreach ($headers as $k => $v) {
+                if ((string) $k == 'proxy-authorization'
+                    || preg_match("/^proxy-authorization:/i", $v)
+                ) {
+                    $hasProxyAuthHeader = true;
+                    break;
+                }
+            }
+            if (!$hasProxyAuthHeader) {
+                $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
+     * @return void
+     * @throws Zend_Http_Client_Adapter_Exception
+     */
+    protected function connectHandshake(
+        $host, $port = 443, $http_ver = '1.1', array &$headers = array()
+    )
+    {
+        $request = "CONNECT $host:$port HTTP/$http_ver\r\n" .
+                   "Host: " . $this->config['proxy_host'] . "\r\n";
+
+        // Process provided headers, including important ones to CONNECT request
+        foreach ($headers as $k => $v) {
+            switch (strtolower(substr($v,0,strpos($v,':')))) {
+                case 'proxy-authorization':
+                    // break intentionally omitted
+
+                case 'user-agent':
+                    $request .= $v . "\r\n";
+                    break;
+
+                default:
+                    break;
+            }
+        }
+        $request .= "\r\n";
+        
+        // @see ZF-3189
+        $this->connectHandshakeRequest = $request;
+
+        // Send the request
+        if (!@fwrite($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();
+        }
+    }
+}