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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