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annotate common-functions.inc @ 68:4dfa3f6a2dc1

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Modify CacheTimeCheck to have a common parent, and two different implementations for script caches and file caches. Support for linkedcaches.
author Tom Fredrik "BFG" Klaussen <bfg@blenning.no>
date Thu, 11 Oct 2012 23:16:53 +0200
parents 74f7b64bdb78
children dd4ddedca4c5
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1 <?php
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2 /**
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3 * @file
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4 * Functionality which doesn't belong anywhere else
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5 */
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6 include_once 'CacheTimeCheck.inc';
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7
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8 /// @cond
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9 $baseDir = dirname(__FILE__);
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10
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11 $cache = ScriptIncludeCache::instance(__FILE__);
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12 $cache->includeOnce('StatusCodes.inc', $baseDir);
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13 /// @endcond
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14
66
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15 /**
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16 * Generates a representation for an array of key => value pairs
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17 *
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18 * @note Behaviour is undefined if value is a composite structure.
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19 *
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20 * @param $map the input array
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21 * @return a string representation that may be eval'ed
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22 */
46
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23 function repMapString($map)
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24 {
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25 $opt = 'array(';
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26 $start = True;
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27
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28 foreach($map as $param => $value) {
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29 if ($start) {
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30 $start = False;
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31 $opt .= "\"${param}\" => \"${value}\"";
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32 }
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33 else {
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34 $opt .= ", \"${param}\" => \"${value}\"";
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35 }
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36 }
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37 $opt .= ')';
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38 return $opt;
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39 }
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40
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41 /**
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42 * Get the location on the server where the top level script is
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43 * located
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44 *
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45 * @return directory
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46 */
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47 function basePath()
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48 {
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49 $l = strrpos($_SERVER['SCRIPT_FILENAME'], $_SERVER['SCRIPT_NAME']);
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50 return substr($_SERVER['SCRIPT_FILENAME'], 0, $l);
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51 }
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52
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53 /**
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54 * Loads a file
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55 *
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56 * @param $sFilename name of the file to load
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57 * @param $sCharset the character encoding of the file
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58 *
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59 * @todo make this function throw instead of returning codes
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60 *
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61 * @return the contents of the file, or a status code (-3 if file does
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62 * not exists, if file could not be opened -2)
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63 */
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64 function loadFile($sFilename, $sCharset = 'UTF-8')
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65 {
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66 if (floatval(phpversion()) >= 4.3) {
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67 if (!file_exists($sFilename))
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68 return -3;
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69 $sData = file_get_contents($sFilename);
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70 }
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71 else {
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72 if (!file_exists($sFilename))
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73 return -3;
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74 $rHandle = fopen($sFilename, 'r');
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75 if (!$rHandle)
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76 return -2;
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77
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78 $sData = '';
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79 while(!feof($rHandle))
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80 $sData .= fread($rHandle, filesize($sFilename));
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81 fclose($rHandle);
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82 }
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83 if ($sEncoding = mb_detect_encoding($sData, 'auto', true) != $sCharset) {
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84 if ($sEncoding != 1) {
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85 $sData = mb_convert_encoding($sData, $sCharset, $sEncoding);
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86 }
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87 }
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88 return $sData;
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89 }
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90
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91 /**
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92 * Generate a status page and exit
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93 *
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94 * @param $errorText the text to be displayed in the body
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95 * @param $errorCode the status code to be served
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96 */
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97 function errorPage($errorText, $errorCode = 403)
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98 {
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99 header(StatusCodes::httpHeaderFor($errorCode));
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100 print "<div id=\"page\"><h1>${errorText}</h1></div>";
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101 exit;
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102 }
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103
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104 /**
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105 * Generates an URL for the specified parameters
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106 *
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107 * @param $urlParams an associative array of the values already set
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108 * @param $keys a set of values to override $urlParams
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109 *
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110 * @param $nonQueryParams a list of keys, where values should be in
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111 * the URL, rather than the query part, note that the order is
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112 * important
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113 */
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114 function genUrl($urlParams, $keys = array(), $nonQueryParams = array()) {
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115 $out = '';
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116 $first = 1;
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117 $new_params = $urlParams;
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118 foreach($keys as $param => $val) {
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119 $new_params[$param] = $val;
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120 }
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121
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122 foreach($nonQueryParams as $nqp) {
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123 if (array_key_exists($nqp, $new_params)) {
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124 $val = $new_params[$nqp];
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125 if ($val)
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126 $out .= "/${val}";
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127 unset($new_params[$nqp]);
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128 }
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129 }
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130
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131 foreach($new_params as $param => $val) {
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132 if ($val) {
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133 if($first) {
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134 $first = 0;
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135 $out .= "?";
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136 }
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137 else
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138 $out .= "&amp;";
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139 $out .= urlencode($param) . '=' . urlencode($val);
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140 }
33
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141 }
45
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142
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143 return $out;
5
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144 }
6
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145
66
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146 /**
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147 * Retrieves a single subelement
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148 * @throw Exception if number of elements are different from 1
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149 *
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150 * @todo Throw more specific exception
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151 *
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152 * @param $obj the xml element to search in
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153 * @param $name the name of the element to search for
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154 */
6
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155 function getElementByTagName($obj, $name) {
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156 $elems = $obj->getElementsByTagName($name);
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157 if ($elems->length != 1) {
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158 throw new Exception("More than one tag with name \"${name}\"");
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159 }
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160 $elem = $elems->item(0);
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161 return $elem;
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162 }
8
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163
66
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164 /**
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165 * Checks if one string start with another string
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166 *
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167 * @param $haystack the string to search
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168 * @param $needle the string to search for
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169 *
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170 * @return bool if match
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171 */
45
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172 function startswith($haystack, $needle)
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173 {
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174 return strpos($haystack, $needle) === 0;
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175 }
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176
66
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177 /**
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178 * Checks if one string ends with another string
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179 *
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180 * @param $haystack the string to search
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181 * @param $needle the string to search for
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182 *
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183 * @return bool if match
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184 */
45
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185 function endsWith($haystack, $needle)
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186 {
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187 $l = strlen($haystack) - strlen($needle);
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188 return strrpos($haystack, $needle) === $l;
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189 }
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190
66
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191 /**
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192 * Queries a URL for headers
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193 *
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194 * @param $url the url to query
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195 * @return an associative array of all headers returned
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196 */
45
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197 function getHeaders($url)
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198 {
66
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199 $response = http_head($url, array("timeout" => 1), $info);
45
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200 $headers = array();
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201 $str = explode("\n", $response);
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diff changeset
202 foreach($str as $kv) {
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203 $p = strpos($kv, ":");
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diff changeset
204 if ($p) {
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205 $key = substr($kv, 0, $p);
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206 $value = trim(substr($kv, $p + 1));
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diff changeset
207 $headers[$key] = $value;
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208 }
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209 }
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210 return $headers;
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211 }
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diff changeset
212
66
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213 /**
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214 * Generates the query part of an URI
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diff changeset
215 *
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diff changeset
216 * @param $opts an associative array of options
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217 * @return a string that can be used for the query part of an URI
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diff changeset
218 */
45
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diff changeset
219 function opttostring($opts)
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diff changeset
220 {
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diff changeset
221 $str = '';
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diff changeset
222 foreach (array_keys($opts) as $key) {
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diff changeset
223 $value = $opts[$key];
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diff changeset
224 if ($str) {
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diff changeset
225 $str .= "&${key}=${value}";
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diff changeset
226 }
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diff changeset
227 else {
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diff changeset
228 $str = "?${key}=${value}";
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diff changeset
229 }
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diff changeset
230 }
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diff changeset
231 return $str;
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diff changeset
232 }
5
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diff changeset
233 ?>