1 | <?php
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2 | /**
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3 | * Class representing a HTTP response
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4 | *
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5 | * PHP version 5
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6 | *
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7 | * LICENSE:
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8 | *
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9 | * Copyright (c) 2008, Alexey Borzov <avb@php.net>
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10 | * All rights reserved.
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11 | *
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12 | * Redistribution and use in source and binary forms, with or without
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13 | * modification, are permitted provided that the following conditions
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14 | * are met:
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15 | *
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16 | * * Redistributions of source code must retain the above copyright
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17 | * notice, this list of conditions and the following disclaimer.
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18 | * * Redistributions in binary form must reproduce the above copyright
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19 | * notice, this list of conditions and the following disclaimer in the
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20 | * documentation and/or other materials provided with the distribution.
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21 | * * The names of the authors may not be used to endorse or promote products
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22 | * derived from this software without specific prior written permission.
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23 | *
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24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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25 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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26 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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27 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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28 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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29 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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30 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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31 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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32 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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35 | *
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36 | * @category HTTP
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37 | * @package HTTP_Request2
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38 | * @author Alexey Borzov <avb@php.net>
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39 | * @license http://opensource.org/licenses/bsd-license.php New BSD License
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40 | * @version CVS: $Id: Response.php,v 1.2 2008/11/15 10:59:30 avb Exp $
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41 | * @link http://pear.php.net/package/HTTP_Request2
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42 | */
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43 |
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44 | /**
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45 | * Exception class for HTTP_Request2 package
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46 | */
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47 |
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48 | /**
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49 | * Class representing a HTTP response
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50 | *
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51 | * The class is designed to be used in "streaming" scenario, building the
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52 | * response as it is being received:
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53 | * <code>
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54 | * $statusLine = read_status_line();
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55 | * $response = new HTTP_Request2_Response($statusLine);
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56 | * do {
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57 | * $headerLine = read_header_line();
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58 | * $response->parseHeaderLine($headerLine);
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59 | * } while ($headerLine != '');
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60 | *
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61 | * while ($chunk = read_body()) {
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62 | * $response->appendBody($chunk);
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63 | * }
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64 | *
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65 | * var_dump($response->getHeader(), $response->getCookies(), $response->getBody());
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66 | * </code>
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67 | *
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68 | *
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69 | * @category HTTP
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70 | * @package HTTP_Request2
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71 | * @author Alexey Borzov <avb@php.net>
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72 | * @version Release: 0.1.0
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73 | * @link http://tools.ietf.org/html/rfc2616#section-6
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74 | */
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75 | class net_php_pear_HTTP_Request2_Response
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76 | {
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77 | /**
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78 | * HTTP protocol version (e.g. 1.0, 1.1)
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79 | * @var string
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80 | */
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81 | protected $version;
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82 |
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83 | /**
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84 | * Status code
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85 | * @var integer
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86 | * @link http://tools.ietf.org/html/rfc2616#section-6.1.1
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87 | */
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88 | protected $code;
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89 |
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90 | /**
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91 | * Reason phrase
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92 | * @var string
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93 | * @link http://tools.ietf.org/html/rfc2616#section-6.1.1
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94 | */
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95 | protected $reasonPhrase;
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96 |
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97 | /**
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98 | * Associative array of response headers
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99 | * @var array
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100 | */
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101 | protected $headers = array();
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102 |
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103 | /**
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104 | * Cookies set in the response
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105 | * @var array
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106 | */
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107 | protected $cookies = array();
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108 |
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109 | /**
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110 | * Name of last header processed by parseHederLine()
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111 | *
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112 | * Used to handle the headers that span multiple lines
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113 | *
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114 | * @var string
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115 | */
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116 | protected $lastHeader = null;
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117 |
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118 | /**
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119 | * Response body
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120 | * @var string
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121 | */
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122 | protected $body = '';
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123 |
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124 | /**
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125 | * Whether the body is still encoded by Content-Encoding
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126 | *
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127 | * cURL provides the decoded body to the callback; if we are reading from
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128 | * socket the body is still gzipped / deflated
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129 | *
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130 | * @var bool
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131 | */
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132 | protected $bodyEncoded;
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133 |
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134 | /**
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135 | * Associative array of HTTP status code / reason phrase.
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136 | *
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137 | * @var array
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138 | * @link http://tools.ietf.org/html/rfc2616#section-10
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139 | */
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140 | protected static $phrases = array(
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141 |
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142 | // 1xx: Informational - Request received, continuing process
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143 | 100 => 'Continue',
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144 | 101 => 'Switching Protocols',
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145 |
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146 | // 2xx: Success - The action was successfully received, understood and
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147 | // accepted
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148 | 200 => 'OK',
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149 | 201 => 'Created',
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150 | 202 => 'Accepted',
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151 | 203 => 'Non-Authoritative Information',
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152 | 204 => 'No Content',
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153 | 205 => 'Reset Content',
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154 | 206 => 'Partial Content',
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155 |
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156 | // 3xx: Redirection - Further action must be taken in order to complete
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157 | // the request
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158 | 300 => 'Multiple Choices',
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159 | 301 => 'Moved Permanently',
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160 | 302 => 'Found', // 1.1
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161 | 303 => 'See Other',
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162 | 304 => 'Not Modified',
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163 | 305 => 'Use Proxy',
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164 | 307 => 'Temporary Redirect',
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165 |
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166 | // 4xx: Client Error - The request contains bad syntax or cannot be
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167 | // fulfilled
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168 | 400 => 'Bad Request',
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169 | 401 => 'Unauthorized',
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170 | 402 => 'Payment Required',
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171 | 403 => 'Forbidden',
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172 | 404 => 'Not Found',
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173 | 405 => 'Method Not Allowed',
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174 | 406 => 'Not Acceptable',
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175 | 407 => 'Proxy Authentication Required',
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176 | 408 => 'Request Timeout',
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177 | 409 => 'Conflict',
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178 | 410 => 'Gone',
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179 | 411 => 'Length Required',
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180 | 412 => 'Precondition Failed',
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181 | 413 => 'Request Entity Too Large',
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182 | 414 => 'Request-URI Too Long',
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183 | 415 => 'Unsupported Media Type',
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184 | 416 => 'Requested Range Not Satisfiable',
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185 | 417 => 'Expectation Failed',
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186 |
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187 | // 5xx: Server Error - The server failed to fulfill an apparently
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188 | // valid request
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189 | 500 => 'Internal Server Error',
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190 | 501 => 'Not Implemented',
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191 | 502 => 'Bad Gateway',
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192 | 503 => 'Service Unavailable',
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193 | 504 => 'Gateway Timeout',
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194 | 505 => 'HTTP Version Not Supported',
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195 | 509 => 'Bandwidth Limit Exceeded',
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196 |
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197 | );
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198 |
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199 | /**
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200 | * Constructor, parses the response status line
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201 | *
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202 | * @param string Response status line (e.g. "HTTP/1.1 200 OK")
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203 | * @param bool Whether body is still encoded by Content-Encoding
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204 | * @throws net_php_pear_HTTP_Request2_Exception if status line is invalid according to spec
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205 | */
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206 | public function __construct($statusLine, $bodyEncoded = true)
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207 | {
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208 | if (!preg_match('!^HTTP/(\d\.\d) (\d{3})(?: (.+))?!', $statusLine, $m)) {
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209 | throw new net_php_pear_HTTP_Request2_Exception("Malformed response: {$statusLine}");
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210 | }
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211 | $this->version = $m[1];
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212 | $this->code = intval($m[2]);
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213 | if (!empty($m[3])) {
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214 | $this->reasonPhrase = trim($m[3]);
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215 | } elseif (!empty(self::$phrases[$this->code])) {
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216 | $this->reasonPhrase = self::$phrases[$this->code];
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217 | }
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218 | $this->bodyEncoded = (bool)$bodyEncoded;
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219 | }
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220 |
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221 | /**
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222 | * Parses the line from HTTP response filling $headers array
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223 | *
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224 | * The method should be called after reading the line from socket or receiving
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225 | * it into cURL callback. Passing an empty string here indicates the end of
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226 | * response headers and triggers additional processing, so be sure to pass an
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227 | * empty string in the end.
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228 | *
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229 | * @param string Line from HTTP response
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230 | */
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231 | public function parseHeaderLine($headerLine)
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232 | {
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233 | $headerLine = trim($headerLine, "\r\n");
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234 |
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235 | // empty string signals the end of headers, process the received ones
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236 | if ('' == $headerLine) {
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237 | if (!empty($this->headers['set-cookie'])) {
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238 | $cookies = is_array($this->headers['set-cookie'])?
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239 | $this->headers['set-cookie']:
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240 | array($this->headers['set-cookie']);
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241 | foreach ($cookies as $cookieString) {
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242 | $this->parseCookie($cookieString);
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243 | }
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244 | unset($this->headers['set-cookie']);
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245 | }
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246 | foreach (array_keys($this->headers) as $k) {
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247 | if (is_array($this->headers[$k])) {
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248 | $this->headers[$k] = implode(', ', $this->headers[$k]);
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249 | }
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250 | }
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251 |
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252 | // string of the form header-name: header value
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253 | } elseif (preg_match('!^([^\x00-\x1f\x7f-\xff()<>@,;:\\\\"/\[\]?={}\s]+):(.+)$!', $headerLine, $m)) {
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254 | $name = strtolower($m[1]);
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255 | $value = trim($m[2]);
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256 | if (empty($this->headers[$name])) {
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257 | $this->headers[$name] = $value;
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258 | } else {
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259 | if (!is_array($this->headers[$name])) {
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260 | $this->headers[$name] = array($this->headers[$name]);
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261 | }
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262 | $this->headers[$name][] = $value;
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263 | }
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264 | $this->lastHeader = $name;
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265 |
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266 | // string
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267 | } elseif (preg_match('!^\s+(.+)$!', $headerLine, $m) && $this->lastHeader) {
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268 | if (!is_array($this->headers[$this->lastHeader])) {
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269 | $this->headers[$this->lastHeader] .= ' ' . trim($m[1]);
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270 | } else {
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271 | $key = count($this->headers[$this->lastHeader]) - 1;
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272 | $this->headers[$this->lastHeader][$key] .= ' ' . trim($m[1]);
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273 | }
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274 | }
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275 | }
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276 |
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277 | /**
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278 | * Parses a Set-Cookie header to fill $cookies array
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279 | *
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280 | * @param string value of Set-Cookie header
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281 | * @link http://cgi.netscape.com/newsref/std/cookie_spec.html
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282 | */
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283 | protected function parseCookie($cookieString)
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284 | {
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285 | $cookie = array(
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286 | 'expires' => null,
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287 | 'domain' => null,
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288 | 'path' => null,
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289 | 'secure' => false
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290 | );
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291 |
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292 | // Only a name=value pair
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293 | if (!strpos($cookieString, ';')) {
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294 | $pos = strpos($cookieString, '=');
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295 | $cookie['name'] = trim(substr($cookieString, 0, $pos));
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296 | $cookie['value'] = trim(substr($cookieString, $pos + 1));
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297 |
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298 | // Some optional parameters are supplied
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299 | } else {
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300 | $elements = explode(';', $cookieString);
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301 | $pos = strpos($elements[0], '=');
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302 | $cookie['name'] = trim(substr($elements[0], 0, $pos));
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303 | $cookie['value'] = trim(substr($elements[0], $pos + 1));
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304 |
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305 | for ($i = 1; $i < count($elements); $i++) {
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306 | if (false === strpos($elements[$i], '=')) {
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307 | $elName = trim($elements[$i]);
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308 | $elValue = null;
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309 | } else {
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310 | list ($elName, $elValue) = array_map('trim', explode('=', $elements[$i]));
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311 | }
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312 | $elName = strtolower($elName);
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313 | if ('secure' == $elName) {
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314 | $cookie['secure'] = true;
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315 | } elseif ('expires' == $elName) {
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316 | $cookie['expires'] = str_replace('"', '', $elValue);
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317 | } elseif ('path' == $elName || 'domain' == $elName) {
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318 | $cookie[$elName] = urldecode($elValue);
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319 | } else {
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320 | $cookie[$elName] = $elValue;
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321 | }
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322 | }
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323 | }
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324 | $this->cookies[] = $cookie;
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325 | }
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326 |
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327 | /**
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328 | * Appends a string to the response body
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329 | * @param string
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330 | */
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331 | public function appendBody($bodyChunk)
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332 | {
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333 | $this->body .= $bodyChunk;
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334 | }
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335 |
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336 | /**
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337 | * Returns the status code
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338 | * @return integer
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339 | */
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340 | public function getStatus()
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341 | {
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342 | return $this->code;
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343 | }
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344 |
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345 | /**
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346 | * Returns the reason phrase
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347 | * @return string
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348 | */
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349 | public function getReasonPhrase()
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350 | {
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351 | return $this->reasonPhrase;
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352 | }
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353 |
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354 | /**
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355 | * Returns either the named header or all response headers
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356 | *
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357 | * @param string Name of header to return
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358 | * @return string|array Value of $headerName header (null if header is
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359 | * not present), array of all response headers if
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360 | * $headerName is null
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361 | */
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362 | public function getHeader($headerName = null)
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363 | {
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364 | if (null === $headerName) {
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365 | return $this->headers;
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366 | } else {
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367 | $headerName = strtolower($headerName);
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368 | return isset($this->headers[$headerName])? $this->headers[$headerName]: null;
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369 | }
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370 | }
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371 |
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372 | /**
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373 | * Returns cookies set in response
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374 | *
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375 | * @return array
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376 | */
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377 | public function getCookies()
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378 | {
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379 | return $this->cookies;
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380 | }
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381 |
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382 | /**
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383 | * Returns the body of the response
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384 | *
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385 | * @return string
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386 | * @throws net_php_pear_HTTP_Request2_Exception if body cannot be decoded
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387 | */
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388 | public function getBody()
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389 | {
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390 | if ($this->bodyEncoded) {
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391 | switch (strtolower($this->getHeader('content-encoding'))) {
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392 | case 'gzip':
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393 | return self::decodeGzip($this->body);
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394 | case 'deflate':
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395 | return self::decodeDeflate($this->body);
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396 | }
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397 | }
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398 | return $this->body;
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399 | }
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400 |
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401 | /**
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402 | * Get the HTTP version of the response
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403 | *
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404 | * @return string
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405 | */
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406 | public function getVersion()
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407 | {
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408 | return $this->version;
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409 | }
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410 |
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411 | /**
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412 | * Decodes the message-body encoded by gzip
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413 | *
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414 | * The real decoding work is done by gzinflate() built-in function, this
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415 | * method only parses the header and checks data for compliance with
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416 | * RFC 1952
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417 | *
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418 | * @param string gzip-encoded data
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419 | * @return string decoded data
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420 | * @throws net_php_pear_HTTP_Request2_Exception
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421 | * @link http://tools.ietf.org/html/rfc1952
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422 | */
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423 | public static function decodeGzip($data)
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424 | {
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425 | $length = strlen($data);
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426 | // If it doesn't look like gzip-encoded data, don't bother
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427 | if (18 > $length || strcmp(substr($data, 0, 2), "\x1f\x8b")) {
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428 | return $data;
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429 | }
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430 | if (!function_exists('gzinflate')) {
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431 | throw new net_php_pear_HTTP_Request2_Exception('Unable to decode body: gzip extension not available');
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432 | }
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433 | $method = ord(substr($data, 2, 1));
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434 | if (8 != $method) {
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435 | throw new net_php_pear_HTTP_Request2_Exception('Error parsing gzip header: unknown compression method');
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436 | }
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437 | $flags = ord(substr($data, 3, 1));
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438 | if ($flags & 224) {
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439 | throw new net_php_pear_HTTP_Request2_Exception('Error parsing gzip header: reserved bits are set');
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440 | }
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441 |
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442 | // header is 10 bytes minimum. may be longer, though.
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443 | $headerLength = 10;
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444 | // extra fields, need to skip 'em
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445 | if ($flags & 4) {
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446 | if ($length - $headerLength - 2 < 8) {
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447 | throw new net_php_pear_HTTP_Request2_Exception('Error parsing gzip header: data too short');
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448 | }
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449 | $extraLength = unpack('v', substr($data, 10, 2));
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450 | if ($length - $headerLength - 2 - $extraLength[1] < 8) {
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451 | throw new net_php_pear_HTTP_Request2_Exception('Error parsing gzip header: data too short');
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452 | }
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453 | $headerLength += $extraLength[1] + 2;
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454 | }
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455 | // file name, need to skip that
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456 | if ($flags & 8) {
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457 | if ($length - $headerLength - 1 < 8) {
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458 | throw new net_php_pear_HTTP_Request2_Exception('Error parsing gzip header: data too short');
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459 | }
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460 | $filenameLength = strpos(substr($data, $headerLength), chr(0));
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461 | if (false === $filenameLength || $length - $headerLength - $filenameLength - 1 < 8) {
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462 | throw new net_php_pear_HTTP_Request2_Exception('Error parsing gzip header: data too short');
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463 | }
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464 | $headerLength += $filenameLength + 1;
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465 | }
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466 | // comment, need to skip that also
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467 | if ($flags & 16) {
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468 | if ($length - $headerLength - 1 < 8) {
|
---|
469 | throw new net_php_pear_HTTP_Request2_Exception('Error parsing gzip header: data too short');
|
---|
470 | }
|
---|
471 | $commentLength = strpos(substr($data, $headerLength), chr(0));
|
---|
472 | if (false === $commentLength || $length - $headerLength - $commentLength - 1 < 8) {
|
---|
473 | throw new net_php_pear_HTTP_Request2_Exception('Error parsing gzip header: data too short');
|
---|
474 | }
|
---|
475 | $headerLength += $commentLength + 1;
|
---|
476 | }
|
---|
477 | // have a CRC for header. let's check
|
---|
478 | if ($flags & 2) {
|
---|
479 | if ($length - $headerLength - 2 < 8) {
|
---|
480 | throw new net_php_pear_HTTP_Request2_Exception('Error parsing gzip header: data too short');
|
---|
481 | }
|
---|
482 | $crcReal = 0xffff & crc32(substr($data, 0, $headerLength));
|
---|
483 | $crcStored = unpack('v', substr($data, $headerLength, 2));
|
---|
484 | if ($crcReal != $crcStored[1]) {
|
---|
485 | throw new net_php_pear_HTTP_Request2_Exception('Header CRC check failed');
|
---|
486 | }
|
---|
487 | $headerLength += 2;
|
---|
488 | }
|
---|
489 | // unpacked data CRC and size at the end of encoded data
|
---|
490 | $tmp = unpack('V2', substr($data, -8));
|
---|
491 | $dataCrc = $tmp[1];
|
---|
492 | $dataSize = $tmp[2];
|
---|
493 |
|
---|
494 | // finally, call the gzinflate() function
|
---|
495 | // don't pass $dataSize to gzinflate, see bugs #13135, #14370
|
---|
496 | $unpacked = gzinflate(substr($data, $headerLength, -8));
|
---|
497 | if (false === $unpacked) {
|
---|
498 | throw new net_php_pear_HTTP_Request2_Exception('gzinflate() call failed');
|
---|
499 | } elseif ($dataSize != strlen($unpacked)) {
|
---|
500 | throw new net_php_pear_HTTP_Request2_Exception('Data size check failed');
|
---|
501 | } elseif ((0xffffffff & $dataCrc) != (0xffffffff & crc32($unpacked))) {
|
---|
502 | throw new net_php_pear_HTTP_Request2_Exception('Data CRC check failed');
|
---|
503 | }
|
---|
504 | return $unpacked;
|
---|
505 | }
|
---|
506 |
|
---|
507 | /**
|
---|
508 | * Decodes the message-body encoded by deflate
|
---|
509 | *
|
---|
510 | * @param string deflate-encoded data
|
---|
511 | * @return string decoded data
|
---|
512 | * @throws net_php_pear_HTTP_Request2_Exception
|
---|
513 | */
|
---|
514 | public static function decodeDeflate($data)
|
---|
515 | {
|
---|
516 | if (!function_exists('gzuncompress')) {
|
---|
517 | throw new net_php_pear_HTTP_Request2_Exception('Unable to decode body: gzip extension not available');
|
---|
518 | }
|
---|
519 | return gzuncompress($data);
|
---|
520 | }
|
---|
521 | }
|
---|
522 | ?> |
---|