[17475] | 1 | <?php |
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| 2 | |
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| 3 | /** |
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| 4 | * Zend Framework |
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| 5 | * |
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| 6 | * LICENSE |
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| 7 | * |
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| 8 | * This source file is subject to the new BSD license that is bundled |
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| 9 | * with this package in the file LICENSE.txt. |
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| 10 | * It is also available through the world-wide-web at this URL: |
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| 11 | * http://framework.zend.com/license/new-bsd |
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| 12 | * If you did not receive a copy of the license and are unable to |
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| 13 | * obtain it through the world-wide-web, please send an email |
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| 14 | * to license@zend.com so we can send you a copy immediately. |
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| 15 | * |
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| 16 | * @category Zend |
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| 17 | * @package Zend_Http |
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| 18 | * @subpackage Client_Adapter |
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| 19 | * @version $Id: Proxy.php 24594 2012-01-05 21:27:01Z matthew $ |
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| 20 | * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com) |
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| 21 | * @license http://framework.zend.com/license/new-bsd New BSD License |
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| 22 | */ |
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| 23 | |
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| 24 | /** |
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| 25 | * @see Zend_Uri_Http |
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| 26 | */ |
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| 27 | require_once 'Zend/Uri/Http.php'; |
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| 28 | /** |
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| 29 | * @see Zend_Http_Client |
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| 30 | */ |
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| 31 | require_once 'Zend/Http/Client.php'; |
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| 32 | /** |
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| 33 | * @see Zend_Http_Client_Adapter_Socket |
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| 34 | */ |
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| 35 | require_once 'Zend/Http/Client/Adapter/Socket.php'; |
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| 36 | |
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| 37 | /** |
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| 38 | * HTTP Proxy-supporting Zend_Http_Client adapter class, based on the default |
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| 39 | * socket based adapter. |
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| 40 | * |
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| 41 | * Should be used if proxy HTTP access is required. If no proxy is set, will |
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| 42 | * fall back to Zend_Http_Client_Adapter_Socket behavior. Just like the |
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| 43 | * default Socket adapter, this adapter does not require any special extensions |
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| 44 | * installed. |
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| 45 | * |
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| 46 | * @category Zend |
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| 47 | * @package Zend_Http |
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| 48 | * @subpackage Client_Adapter |
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| 49 | * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com) |
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| 50 | * @license http://framework.zend.com/license/new-bsd New BSD License |
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| 51 | */ |
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| 52 | class Zend_Http_Client_Adapter_Proxy extends Zend_Http_Client_Adapter_Socket |
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| 53 | { |
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| 54 | /** |
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| 55 | * Parameters array |
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| 56 | * |
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| 57 | * @var array |
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| 58 | */ |
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| 59 | protected $config = array( |
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| 60 | 'ssltransport' => 'ssl', |
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| 61 | 'sslcert' => null, |
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| 62 | 'sslpassphrase' => null, |
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| 63 | 'sslusecontext' => false, |
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| 64 | 'proxy_host' => '', |
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| 65 | 'proxy_port' => 8080, |
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| 66 | 'proxy_user' => '', |
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| 67 | 'proxy_pass' => '', |
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| 68 | 'proxy_auth' => Zend_Http_Client::AUTH_BASIC, |
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| 69 | 'persistent' => false |
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| 70 | ); |
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| 71 | |
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| 72 | /** |
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| 73 | * Whether HTTPS CONNECT was already negotiated with the proxy or not |
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| 74 | * |
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| 75 | * @var boolean |
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| 76 | */ |
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| 77 | protected $negotiated = false; |
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| 78 | |
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| 79 | /** |
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| 80 | * Connect to the remote server |
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| 81 | * |
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| 82 | * Will try to connect to the proxy server. If no proxy was set, will |
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| 83 | * fall back to the target server (behave like regular Socket adapter) |
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| 84 | * |
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| 85 | * @param string $host |
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| 86 | * @param int $port |
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| 87 | * @param boolean $secure |
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| 88 | */ |
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| 89 | public function connect($host, $port = 80, $secure = false) |
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| 90 | { |
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| 91 | // If no proxy is set, fall back to Socket adapter |
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| 92 | if (! $this->config['proxy_host']) { |
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| 93 | return parent::connect($host, $port, $secure); |
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| 94 | } |
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| 95 | |
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| 96 | /* Url might require stream context even if proxy connection doesn't */ |
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| 97 | if ($secure) { |
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| 98 | $this->config['sslusecontext'] = true; |
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| 99 | } |
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| 100 | |
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| 101 | // Connect (a non-secure connection) to the proxy server |
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| 102 | return parent::connect( |
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| 103 | $this->config['proxy_host'], |
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| 104 | $this->config['proxy_port'], |
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| 105 | false |
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| 106 | ); |
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| 107 | } |
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| 108 | |
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| 109 | /** |
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| 110 | * Send request to the proxy server |
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| 111 | * |
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| 112 | * @param string $method |
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| 113 | * @param Zend_Uri_Http $uri |
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| 114 | * @param string $http_ver |
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| 115 | * @param array $headers |
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| 116 | * @param string $body |
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| 117 | * @return string Request as string |
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| 118 | */ |
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| 119 | public function write($method, $uri, $http_ver = '1.1', $headers = array(), $body = '') |
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| 120 | { |
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| 121 | // If no proxy is set, fall back to default Socket adapter |
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| 122 | if (! $this->config['proxy_host']) return parent::write($method, $uri, $http_ver, $headers, $body); |
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| 123 | |
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| 124 | // Make sure we're properly connected |
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| 125 | if (! $this->socket) { |
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| 126 | require_once 'Zend/Http/Client/Adapter/Exception.php'; |
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| 127 | throw new Zend_Http_Client_Adapter_Exception("Trying to write but we are not connected"); |
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| 128 | } |
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| 129 | |
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| 130 | $host = $this->config['proxy_host']; |
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| 131 | $port = $this->config['proxy_port']; |
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| 132 | |
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| 133 | if ($this->connected_to[0] != "tcp://$host" || $this->connected_to[1] != $port) { |
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| 134 | require_once 'Zend/Http/Client/Adapter/Exception.php'; |
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| 135 | throw new Zend_Http_Client_Adapter_Exception("Trying to write but we are connected to the wrong proxy server"); |
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| 136 | } |
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| 137 | |
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| 138 | // Add Proxy-Authorization header |
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| 139 | if ($this->config['proxy_user'] && ! isset($headers['proxy-authorization'])) { |
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| 140 | $headers['proxy-authorization'] = Zend_Http_Client::encodeAuthHeader( |
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| 141 | $this->config['proxy_user'], $this->config['proxy_pass'], $this->config['proxy_auth'] |
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| 142 | ); |
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| 143 | } |
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| 144 | |
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| 145 | // if we are proxying HTTPS, preform CONNECT handshake with the proxy |
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| 146 | if ($uri->getScheme() == 'https' && (! $this->negotiated)) { |
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| 147 | $this->connectHandshake($uri->getHost(), $uri->getPort(), $http_ver, $headers); |
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| 148 | $this->negotiated = true; |
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| 149 | } |
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| 150 | |
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| 151 | // Save request method for later |
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| 152 | $this->method = $method; |
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| 153 | |
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| 154 | // Build request headers |
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| 155 | if ($this->negotiated) { |
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| 156 | $path = $uri->getPath(); |
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| 157 | if ($uri->getQuery()) { |
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| 158 | $path .= '?' . $uri->getQuery(); |
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| 159 | } |
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| 160 | $request = "$method $path HTTP/$http_ver\r\n"; |
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| 161 | } else { |
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| 162 | $request = "$method $uri HTTP/$http_ver\r\n"; |
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| 163 | } |
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| 164 | |
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| 165 | // Add all headers to the request string |
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| 166 | foreach ($headers as $k => $v) { |
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| 167 | if (is_string($k)) $v = "$k: $v"; |
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| 168 | $request .= "$v\r\n"; |
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| 169 | } |
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| 170 | |
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| 171 | if(is_resource($body)) { |
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| 172 | $request .= "\r\n"; |
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| 173 | } else { |
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| 174 | // Add the request body |
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| 175 | $request .= "\r\n" . $body; |
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| 176 | } |
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| 177 | |
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| 178 | // Send the request |
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| 179 | if (! @fwrite($this->socket, $request)) { |
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| 180 | require_once 'Zend/Http/Client/Adapter/Exception.php'; |
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| 181 | throw new Zend_Http_Client_Adapter_Exception("Error writing request to proxy server"); |
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| 182 | } |
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| 183 | |
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| 184 | if(is_resource($body)) { |
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| 185 | if(stream_copy_to_stream($body, $this->socket) == 0) { |
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| 186 | require_once 'Zend/Http/Client/Adapter/Exception.php'; |
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| 187 | throw new Zend_Http_Client_Adapter_Exception('Error writing request to server'); |
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| 188 | } |
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| 189 | } |
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| 190 | |
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| 191 | return $request; |
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| 192 | } |
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| 193 | |
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| 194 | /** |
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| 195 | * Preform handshaking with HTTPS proxy using CONNECT method |
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| 196 | * |
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| 197 | * @param string $host |
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| 198 | * @param integer $port |
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| 199 | * @param string $http_ver |
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| 200 | * @param array $headers |
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| 201 | */ |
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| 202 | protected function connectHandshake($host, $port = 443, $http_ver = '1.1', array &$headers = array()) |
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| 203 | { |
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| 204 | $request = "CONNECT $host:$port HTTP/$http_ver\r\n" . |
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| 205 | "Host: " . $this->config['proxy_host'] . "\r\n"; |
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| 206 | |
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| 207 | // Add the user-agent header |
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| 208 | if (isset($this->config['useragent'])) { |
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| 209 | $request .= "User-agent: " . $this->config['useragent'] . "\r\n"; |
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| 210 | } |
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| 211 | |
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| 212 | // If the proxy-authorization header is set, send it to proxy but remove |
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| 213 | // it from headers sent to target host |
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| 214 | if (isset($headers['proxy-authorization'])) { |
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| 215 | $request .= "Proxy-authorization: " . $headers['proxy-authorization'] . "\r\n"; |
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| 216 | unset($headers['proxy-authorization']); |
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| 217 | } |
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| 218 | |
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| 219 | $request .= "\r\n"; |
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| 220 | |
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| 221 | // Send the request |
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| 222 | if (! @fwrite($this->socket, $request)) { |
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| 223 | require_once 'Zend/Http/Client/Adapter/Exception.php'; |
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| 224 | throw new Zend_Http_Client_Adapter_Exception("Error writing request to proxy server"); |
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| 225 | } |
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| 226 | |
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| 227 | // Read response headers only |
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| 228 | $response = ''; |
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| 229 | $gotStatus = false; |
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| 230 | while ($line = @fgets($this->socket)) { |
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| 231 | $gotStatus = $gotStatus || (strpos($line, 'HTTP') !== false); |
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| 232 | if ($gotStatus) { |
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| 233 | $response .= $line; |
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| 234 | if (!chop($line)) break; |
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| 235 | } |
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| 236 | } |
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| 237 | |
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| 238 | // Check that the response from the proxy is 200 |
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| 239 | if (Zend_Http_Response::extractCode($response) != 200) { |
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| 240 | require_once 'Zend/Http/Client/Adapter/Exception.php'; |
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| 241 | throw new Zend_Http_Client_Adapter_Exception("Unable to connect to HTTPS proxy. Server response: " . $response); |
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| 242 | } |
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| 243 | |
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| 244 | // If all is good, switch socket to secure mode. We have to fall back |
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| 245 | // through the different modes |
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| 246 | $modes = array( |
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| 247 | STREAM_CRYPTO_METHOD_TLS_CLIENT, |
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| 248 | STREAM_CRYPTO_METHOD_SSLv3_CLIENT, |
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| 249 | STREAM_CRYPTO_METHOD_SSLv23_CLIENT, |
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| 250 | STREAM_CRYPTO_METHOD_SSLv2_CLIENT |
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| 251 | ); |
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| 252 | |
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| 253 | $success = false; |
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| 254 | foreach($modes as $mode) { |
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| 255 | $success = stream_socket_enable_crypto($this->socket, true, $mode); |
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| 256 | if ($success) break; |
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| 257 | } |
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| 258 | |
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| 259 | if (! $success) { |
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| 260 | require_once 'Zend/Http/Client/Adapter/Exception.php'; |
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| 261 | throw new Zend_Http_Client_Adapter_Exception("Unable to connect to" . |
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| 262 | " HTTPS server through proxy: could not negotiate secure connection."); |
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| 263 | } |
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| 264 | } |
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| 265 | |
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| 266 | /** |
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| 267 | * Close the connection to the server |
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| 268 | * |
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| 269 | */ |
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| 270 | public function close() |
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| 271 | { |
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| 272 | parent::close(); |
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| 273 | $this->negotiated = false; |
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| 274 | } |
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| 275 | |
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| 276 | /** |
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| 277 | * Destructor: make sure the socket is disconnected |
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| 278 | * |
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| 279 | */ |
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| 280 | public function __destruct() |
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| 281 | { |
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| 282 | if ($this->socket) $this->close(); |
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| 283 | } |
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| 284 | } |
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