1 | <?php |
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2 | /** |
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3 | * A Class for connecting to a caldav server |
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4 | * |
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5 | * @package awl |
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6 | * removed curl - now using fsockopen |
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7 | * changed 2009 by Andres Obrero - Switzerland andres@obrero.ch |
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8 | * |
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9 | * @subpackage caldav |
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10 | * @author Andrew McMillan <debian@mcmillan.net.nz> |
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11 | * @copyright Andrew McMillan |
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12 | * @license http://gnu.org/copyleft/gpl.html GNU GPL v2 |
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13 | */ |
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14 | |
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15 | |
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16 | /** |
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17 | * A class for accessing DAViCal via CalDAV, as a client |
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18 | * |
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19 | * @package awl |
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20 | */ |
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21 | class CalDAVClient { |
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22 | /** |
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23 | * Server, username, password, calendar |
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24 | * |
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25 | * @var string |
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26 | */ |
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27 | var $base_url, $user, $pass, $calendar, $entry, $protocol, $server, $port; |
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28 | |
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29 | /** |
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30 | * The useragent which is send to the caldav server |
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31 | * |
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32 | * @var string |
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33 | */ |
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34 | var $user_agent = 'DAViCalClient'; |
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35 | |
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36 | var $headers = array(); |
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37 | var $body = ""; |
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38 | var $requestMethod = "GET"; |
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39 | var $httpRequest = ""; // for debugging http headers sent |
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40 | var $xmlRequest = ""; // for debugging xml sent |
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41 | var $httpResponse = ""; // for debugging http headers received |
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42 | var $xmlResponse = ""; // for debugging xml received |
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43 | |
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44 | /** |
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45 | * Constructor, initialises the class |
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46 | * |
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47 | * @param string $base_url The URL for the calendar server |
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48 | * @param string $user The name of the user logging in |
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49 | * @param string $pass The password for that user |
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50 | * @param string $calendar The name of the calendar (not currently used) |
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51 | */ |
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52 | function CalDAVClient( $base_url, $user, $pass, $calendar = '' ) { |
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53 | $this->user = $user; |
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54 | $this->pass = $pass; |
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55 | $this->calendar = $calendar; |
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56 | $this->headers = array(); |
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57 | |
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58 | if ( preg_match( '#^(https?)://([a-z0-9.-]+)(:([0-9]+))?(/.*)$#', $base_url, $matches ) ) { |
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59 | $this->server = $matches[2]; |
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60 | $this->base_url = $matches[5]; |
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61 | if ( $matches[1] == 'https' ) { |
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62 | $this->protocol = 'ssl'; |
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63 | $this->port = 443; |
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64 | } |
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65 | else { |
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66 | $this->protocol = 'tcp'; |
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67 | $this->port = 80; |
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68 | } |
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69 | if ( $matches[4] != '' ) { |
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70 | $this->port = intval($matches[4]); |
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71 | } |
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72 | } |
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73 | else { |
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74 | trigger_error("Invalid URL: '".$base_url."'", E_USER_ERROR); |
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75 | } |
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76 | } |
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77 | |
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78 | /** |
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79 | * Adds an If-Match or If-None-Match header |
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80 | * |
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81 | * @param bool $match to Match or Not to Match, that is the question! |
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82 | * @param string $etag The etag to match / not match against. |
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83 | */ |
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84 | function SetMatch( $match, $etag = '*' ) { |
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85 | $this->headers[] = sprintf( "%s-Match: %s", ($match ? "If" : "If-None"), $etag); |
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86 | } |
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87 | |
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88 | /* |
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89 | * Add a Depth: header. Valid values are 0, 1 or infinity |
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90 | * |
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91 | * @param int $depth The depth, default to infinity |
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92 | */ |
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93 | function SetDepth( $depth = '0' ) { |
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94 | $this->headers[] = 'Depth: '. ($depth == '1' ? "1" : ($depth == 'infinity' ? $depth : "0") ); |
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95 | } |
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96 | |
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97 | /** |
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98 | * Add a Depth: header. Valid values are 1 or infinity |
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99 | * |
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100 | * @param int $depth The depth, default to infinity |
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101 | */ |
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102 | function SetUserAgent( $user_agent = null ) { |
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103 | if ( !isset($user_agent) ) $user_agent = $this->user_agent; |
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104 | $this->user_agent = $user_agent; |
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105 | } |
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106 | |
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107 | /** |
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108 | * Add a Content-type: header. |
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109 | * |
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110 | * @param int $type The content type |
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111 | */ |
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112 | function SetContentType( $type ) { |
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113 | $this->headers[] = "Content-type: $type"; |
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114 | } |
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115 | |
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116 | /** |
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117 | * Split response into httpResponse and xmlResponse |
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118 | * |
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119 | * @param string Response from server |
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120 | */ |
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121 | function ParseResponse( $response ) { |
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122 | $pos = strpos($response, '<?xml'); |
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123 | if ($pos === false) { |
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124 | $this->httpResponse = trim($response); |
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125 | } |
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126 | else { |
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127 | $this->httpResponse = trim(substr($response, 0, $pos)); |
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128 | $this->xmlResponse = trim(substr($response, $pos)); |
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129 | } |
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130 | } |
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131 | |
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132 | /** |
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133 | * Output http request headers |
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134 | * |
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135 | * @return HTTP headers |
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136 | */ |
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137 | function GetHttpRequest() { |
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138 | return $this->httpRequest; |
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139 | } |
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140 | /** |
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141 | * Output http response headers |
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142 | * |
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143 | * @return HTTP headers |
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144 | */ |
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145 | function GetHttpResponse() { |
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146 | return $this->httpResponse; |
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147 | } |
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148 | /** |
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149 | * Output xml request |
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150 | * |
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151 | * @return raw xml |
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152 | */ |
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153 | function GetXmlRequest() { |
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154 | return $this->xmlRequest; |
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155 | } |
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156 | /** |
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157 | * Output xml response |
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158 | * |
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159 | * @return raw xml |
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160 | */ |
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161 | function GetXmlResponse() { |
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162 | return $this->xmlResponse; |
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163 | } |
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164 | |
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165 | /** |
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166 | * Send a request to the server |
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167 | * |
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168 | * @param string $relative_url The URL to make the request to, relative to $base_url |
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169 | * |
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170 | * @return string The content of the response from the server |
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171 | */ |
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172 | function DoRequest( $relative_url = "" ) { |
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173 | if(!defined("_FSOCK_TIMEOUT")){ define("_FSOCK_TIMEOUT", 10); } |
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174 | $headers = array(); |
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175 | |
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176 | $headers[] = $this->requestMethod." ". $this->base_url . $relative_url . " HTTP/1.1"; |
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177 | $headers[] = "Authorization: Basic ".base64_encode($this->user .":". $this->pass ); |
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178 | $headers[] = "Host: ".$this->server .":".$this->port; |
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179 | |
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180 | foreach( $this->headers as $ii => $head ) { |
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181 | $headers[] = $head; |
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182 | } |
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183 | $headers[] = "Content-Length: " . strlen($this->body); |
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184 | $headers[] = "User-Agent: " . $this->user_agent; |
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185 | $headers[] = 'Connection: close'; |
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186 | $this->httpRequest = join("\r\n",$headers); |
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187 | $this->xmlRequest = $this->body; |
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188 | |
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189 | $fip = fsockopen( $this->protocol . '://' . $this->server, $this->port, $errno, $errstr, _FSOCK_TIMEOUT); //error handling? |
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190 | if ( !(get_resource_type($fip) == 'stream') ) return false; |
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191 | if ( !fwrite($fip, $this->httpRequest."\r\n\r\n".$this->body) ) { fclose($fip); return false; } |
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192 | $rsp = ""; |
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193 | while( !feof($fip) ) { $rsp .= fgets($fip,8192); } |
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194 | fclose($fip); |
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195 | |
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196 | $this->headers = array(); // reset the headers array for our next request |
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197 | $this->ParseResponse($rsp); |
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198 | return $rsp; |
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199 | } |
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200 | |
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201 | |
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202 | /** |
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203 | * Send an OPTIONS request to the server |
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204 | * |
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205 | * @param string $relative_url The URL to make the request to, relative to $base_url |
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206 | * |
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207 | * @return array The allowed options |
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208 | */ |
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209 | function DoOptionsRequest( $relative_url = "" ) { |
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210 | $this->requestMethod = "OPTIONS"; |
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211 | $this->body = ""; |
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212 | $headers = $this->DoRequest($relative_url); |
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213 | $options_header = preg_replace( '/^.*Allow: ([a-z, ]+)\r?\n.*/is', '$1', $headers ); |
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214 | $options = array_flip( preg_split( '/[, ]+/', $options_header )); |
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215 | return $options; |
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216 | } |
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217 | |
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218 | |
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219 | |
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220 | /** |
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221 | * Send an XML request to the server (e.g. PROPFIND, REPORT, MKCALENDAR) |
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222 | * |
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223 | * @param string $method The method (PROPFIND, REPORT, etc) to use with the request |
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224 | * @param string $xml The XML to send along with the request |
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225 | * @param string $relative_url The URL to make the request to, relative to $base_url |
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226 | * |
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227 | * @return array An array of the allowed methods |
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228 | */ |
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229 | function DoXMLRequest( $request_method, $xml, $relative_url = '' ) { |
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230 | $this->body = $xml; |
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231 | $this->requestMethod = $request_method; |
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232 | $this->SetContentType("text/xml"); |
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233 | return $this->DoRequest($relative_url); |
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234 | } |
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235 | |
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236 | |
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237 | |
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238 | /** |
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239 | * Get a single item from the server. |
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240 | * |
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241 | * @param string $relative_url The part of the URL after the calendar |
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242 | */ |
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243 | function DoGETRequest( $relative_url ) { |
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244 | $this->body = ""; |
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245 | $this->requestMethod = "GET"; |
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246 | return $this->DoRequest( $relative_url ); |
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247 | } |
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248 | |
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249 | |
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250 | /** |
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251 | * PUT a text/icalendar resource, returning the etag |
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252 | * |
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253 | * @param string $relative_url The URL to make the request to, relative to $base_url |
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254 | * @param string $icalendar The iCalendar resource to send to the server |
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255 | * @param string $etag The etag of an existing resource to be overwritten, or '*' for a new resource. |
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256 | * |
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257 | * @return string The content of the response from the server |
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258 | */ |
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259 | function DoPUTRequest( $relative_url, $icalendar, $etag = null ) { |
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260 | $this->body = $icalendar; |
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261 | |
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262 | $this->requestMethod = "PUT"; |
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263 | if ( $etag != null ) { |
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264 | $this->SetMatch( ($etag != '*'), $etag ); |
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265 | } |
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266 | $this->SetContentType("text/icalendar"); |
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267 | $headers = $this->DoRequest($relative_url); |
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268 | |
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269 | /** |
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270 | * RSCDS will always return the real etag on PUT. Other CalDAV servers may need |
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271 | * more work, but we are assuming we are running against RSCDS in this case. |
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272 | */ |
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273 | $etag = preg_replace( '/^.*Etag: "?([^"\r\n]+)"?\r?\n.*/is', '$1', $headers ); |
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274 | return $etag; |
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275 | } |
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276 | |
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277 | |
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278 | /** |
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279 | * DELETE a text/icalendar resource |
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280 | * |
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281 | * @param string $relative_url The URL to make the request to, relative to $base_url |
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282 | * @param string $etag The etag of an existing resource to be deleted, or '*' for any resource at that URL. |
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283 | * |
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284 | * @return int The HTTP Result Code for the DELETE |
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285 | */ |
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286 | function DoDELETERequest( $relative_url, $etag = null ) { |
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287 | $this->body = ""; |
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288 | |
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289 | $this->requestMethod = "DELETE"; |
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290 | if ( $etag != null ) { |
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291 | $this->SetMatch( true, $etag ); |
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292 | } |
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293 | $this->DoRequest($relative_url); |
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294 | return $this->resultcode; |
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295 | } |
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296 | |
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297 | |
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298 | /** |
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299 | * Given XML for a calendar query, return an array of the events (/todos) in the |
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300 | * response. Each event in the array will have a 'href', 'etag' and '$response_type' |
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301 | * part, where the 'href' is relative to the calendar and the '$response_type' contains the |
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302 | * definition of the calendar data in iCalendar format. |
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303 | * |
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304 | * @param string $filter XML fragment which is the <filter> element of a calendar-query |
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305 | * @param string $relative_url The URL relative to the base_url specified when the calendar was opened. Default ''. |
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306 | * @param string $report_type Used as a name for the array element containing the calendar data. @deprecated |
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307 | * |
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308 | * @return array An array of the relative URLs, etags, and events from the server. Each element of the array will |
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309 | * be an array with 'href', 'etag' and 'data' elements, corresponding to the URL, the server-supplied |
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310 | * etag (which only varies when the data changes) and the calendar data in iCalendar format. |
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311 | */ |
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312 | function DoCalendarQuery( $filter, $relative_url = '' ) { |
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313 | |
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314 | $xml = <<<EOXML |
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315 | <?xml version="1.0" encoding="utf-8" ?> |
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316 | <C:calendar-query xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav"> |
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317 | <D:prop> |
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318 | <C:calendar-data/> |
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319 | <D:getetag/> |
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320 | </D:prop>$filter |
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321 | </C:calendar-query> |
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322 | EOXML; |
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323 | |
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324 | $this->DoXMLRequest( 'REPORT', $xml, $relative_url ); |
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325 | $xml_parser = xml_parser_create_ns('UTF-8'); |
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326 | $this->xml_tags = array(); |
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327 | xml_parser_set_option ( $xml_parser, XML_OPTION_SKIP_WHITE, 1 ); |
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328 | xml_parse_into_struct( $xml_parser, $this->xmlResponse, $this->xml_tags ); |
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329 | xml_parser_free($xml_parser); |
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330 | |
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331 | $report = array(); |
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332 | foreach( $this->xml_tags as $k => $v ) { |
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333 | switch( $v['tag'] ) { |
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334 | case 'DAV::RESPONSE': |
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335 | if ( $v['type'] == 'open' ) { |
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336 | $response = array(); |
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337 | } |
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338 | elseif ( $v['type'] == 'close' ) { |
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339 | $report[] = $response; |
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340 | } |
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341 | break; |
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342 | case 'DAV::HREF': |
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343 | $response['href'] = basename( $v['value'] ); |
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344 | break; |
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345 | case 'DAV::GETETAG': |
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346 | $response['etag'] = preg_replace('/^"?([^"]+)"?/', '$1', $v['value']); |
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347 | break; |
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348 | case 'URN:IETF:PARAMS:XML:NS:CALDAV:CALENDAR-DATA': |
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349 | $response['data'] = $v['value']; |
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350 | break; |
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351 | } |
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352 | } |
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353 | return $report; |
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354 | } |
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355 | |
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356 | |
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357 | /** |
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358 | * Get the events in a range from $start to $finish. The dates should be in the |
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359 | * format yyyymmddThhmmssZ and should be in GMT. The events are returned as an |
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360 | * array of event arrays. Each event array will have a 'href', 'etag' and 'event' |
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361 | * part, where the 'href' is relative to the calendar and the event contains the |
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362 | * definition of the event in iCalendar format. |
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363 | * |
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364 | * @param timestamp $start The start time for the period |
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365 | * @param timestamp $finish The finish time for the period |
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366 | * @param string $relative_url The URL relative to the base_url specified when the calendar was opened. Default ''. |
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367 | * |
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368 | * @return array An array of the relative URLs, etags, and events, returned from DoCalendarQuery() @see DoCalendarQuery() |
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369 | */ |
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370 | function GetEvents( $start = null, $finish = null, $relative_url = '' ) { |
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371 | $filter = ""; |
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372 | if ( isset($start) && isset($finish) ) |
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373 | $range = "<C:time-range start=\"$start\" end=\"$finish\"/>"; |
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374 | else |
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375 | $range = ''; |
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376 | |
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377 | $filter = <<<EOFILTER |
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378 | <C:filter> |
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379 | <C:comp-filter name="VCALENDAR"> |
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380 | <C:comp-filter name="VEVENT"> |
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381 | $range |
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382 | </C:comp-filter> |
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383 | </C:comp-filter> |
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384 | </C:filter> |
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385 | EOFILTER; |
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386 | |
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387 | return $this->DoCalendarQuery($filter, $relative_url); |
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388 | } |
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389 | |
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390 | |
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391 | /** |
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392 | * Get the todo's in a range from $start to $finish. The dates should be in the |
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393 | * format yyyymmddThhmmssZ and should be in GMT. The events are returned as an |
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394 | * array of event arrays. Each event array will have a 'href', 'etag' and 'event' |
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395 | * part, where the 'href' is relative to the calendar and the event contains the |
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396 | * definition of the event in iCalendar format. |
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397 | * |
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398 | * @param timestamp $start The start time for the period |
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399 | * @param timestamp $finish The finish time for the period |
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400 | * @param boolean $completed Whether to include completed tasks |
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401 | * @param boolean $cancelled Whether to include cancelled tasks |
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402 | * @param string $relative_url The URL relative to the base_url specified when the calendar was opened. Default ''. |
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403 | * |
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404 | * @return array An array of the relative URLs, etags, and events, returned from DoCalendarQuery() @see DoCalendarQuery() |
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405 | */ |
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406 | function GetTodos( $start, $finish, $completed = false, $cancelled = false, $relative_url = "" ) { |
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407 | |
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408 | if ( $start && $finish ) { |
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409 | $time_range = <<<EOTIME |
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410 | <C:time-range start="$start" end="$finish"/> |
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411 | EOTIME; |
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412 | } |
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413 | |
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414 | // Warning! May contain traces of double negatives... |
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415 | $neg_cancelled = ( $cancelled === true ? "no" : "yes" ); |
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416 | $neg_completed = ( $cancelled === true ? "no" : "yes" ); |
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417 | |
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418 | $filter = <<<EOFILTER |
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419 | <C:filter> |
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420 | <C:comp-filter name="VCALENDAR"> |
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421 | <C:comp-filter name="VTODO"> |
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422 | <C:prop-filter name="STATUS"> |
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423 | <C:text-match negate-condition="$neg_completed">COMPLETED</C:text-match> |
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424 | </C:prop-filter> |
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425 | <C:prop-filter name="STATUS"> |
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426 | <C:text-match negate-condition="$neg_cancelled">CANCELLED</C:text-match> |
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427 | </C:prop-filter>$time_range |
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428 | </C:comp-filter> |
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429 | </C:comp-filter> |
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430 | </C:filter> |
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431 | EOFILTER; |
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432 | |
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433 | return $this->DoCalendarQuery($filter, $relative_url); |
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434 | } |
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435 | |
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436 | |
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437 | /** |
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438 | * Get the calendar entry by UID |
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439 | * |
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440 | * @param uid |
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441 | * @param string $relative_url The URL relative to the base_url specified when the calendar was opened. Default ''. |
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442 | * |
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443 | * @return array An array of the relative URL, etag, and calendar data returned from DoCalendarQuery() @see DoCalendarQuery() |
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444 | */ |
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445 | function GetEntryByUid( $uid, $relative_url = '' ) { |
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446 | $filter = ""; |
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447 | if ( $uid ) { |
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448 | $filter = <<<EOFILTER |
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449 | <C:filter> |
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450 | <C:comp-filter name="VCALENDAR"> |
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451 | <C:comp-filter name="VEVENT"> |
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452 | <C:prop-filter name="UID"> |
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453 | <C:text-match icollation="i;octet">$uid</C:text-match> |
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454 | </C:prop-filter> |
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455 | </C:comp-filter> |
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456 | </C:comp-filter> |
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457 | </C:filter> |
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458 | EOFILTER; |
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459 | } |
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460 | |
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461 | return $this->DoCalendarQuery($filter, $relative_url); |
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462 | } |
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463 | |
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464 | |
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465 | /** |
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466 | * Get the calendar entry by HREF |
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467 | * |
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468 | * @param string $href The href from a call to GetEvents or GetTodos etc. |
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469 | * @param string $relative_url The URL relative to the base_url specified when the calendar was opened. Default ''. |
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470 | * |
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471 | * @return string The iCalendar of the calendar entry |
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472 | */ |
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473 | function GetEntryByHref( $href, $relative_url = '' ) { |
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474 | return $this->DoGETRequest( $relative_url . $href ); |
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475 | } |
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476 | |
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477 | } |
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478 | |
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479 | /** |
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480 | * Usage example |
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481 | * |
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482 | * $cal = new CalDAVClient( "http://calendar.example.com/caldav.php/username/calendar/", "username", "password", "calendar" ); |
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483 | * $options = $cal->DoOptionsRequest(); |
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484 | * if ( isset($options["PROPFIND"]) ) { |
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485 | * // Fetch some information about the events in that calendar |
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486 | * $cal->SetDepth(1); |
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487 | * $folder_xml = $cal->DoXMLRequest("PROPFIND", '<?xml version="1.0" encoding="utf-8" ?><propfind xmlns="DAV:"><prop><getcontentlength/><getcontenttype/><resourcetype/><getetag/></prop></propfind>' ); |
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488 | * } |
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489 | * // Fetch all events for February |
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490 | * $events = $cal->GetEvents("20070101T000000Z","20070201T000000Z"); |
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491 | * foreach ( $events AS $k => $event ) { |
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492 | * do_something_with_event_data( $event['data'] ); |
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493 | * } |
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494 | * $acc = array(); |
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495 | * $acc["google"] = array( |
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496 | * "user"=>"kunsttherapie@gmail.com", |
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497 | * "pass"=>"xxxxx", |
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498 | * "server"=>"ssl://www.google.com", |
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499 | * "port"=>"443", |
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500 | * "uri"=>"https://www.google.com/calendar/dav/kunsttherapie@gmail.com/events/", |
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501 | * ); |
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502 | * |
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503 | * $acc["davical"] = array( |
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504 | * "user"=>"some_user", |
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505 | * "pass"=>"big secret", |
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506 | * "server"=>"calendar.foo.bar", |
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507 | * "port"=>"80", |
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508 | * "uri"=>"http://calendar.foo.bar/caldav.php/some_user/home/", |
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509 | * ); |
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510 | * //******************************* |
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511 | * |
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512 | * $account = $acc["davical"]; |
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513 | * |
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514 | * //******************************* |
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515 | * $cal = new CalDAVClient( $account["uri"], $account["user"], $account["pass"], "", $account["server"], $account["port"] ); |
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516 | * $options = $cal->DoOptionsRequest(); |
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517 | * print_r($options); |
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518 | * |
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519 | * //******************************* |
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520 | * //******************************* |
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521 | * |
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522 | * $xmlC = <<<PROPP |
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523 | * <?xml version="1.0" encoding="utf-8" ?> |
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524 | * <D:propfind xmlns:D="DAV:" xmlns:C="http://calendarserver.org/ns/"> |
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525 | * <D:prop> |
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526 | * <D:displayname /> |
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527 | * <C:getctag /> |
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528 | * <D:resourcetype /> |
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529 | * |
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530 | * </D:prop> |
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531 | * </D:propfind> |
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532 | * PROPP; |
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533 | * //if ( isset($options["PROPFIND"]) ) { |
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534 | * // Fetch some information about the events in that calendar |
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535 | * // $cal->SetDepth(1); |
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536 | * // $folder_xml = $cal->DoXMLRequest("PROPFIND", $xmlC); |
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537 | * // print_r( $folder_xml); |
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538 | * //} |
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539 | * |
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540 | * // Fetch all events for February |
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541 | * $events = $cal->GetEvents("20090201T000000Z","20090301T000000Z"); |
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542 | * foreach ( $events as $k => $event ) { |
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543 | * print_r($event['data']); |
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544 | * print "\n---------------------------------------------\n"; |
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545 | * } |
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546 | * |
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547 | * //******************************* |
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548 | * //******************************* |
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549 | */ |
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