[795] | 1 | <?php |
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| 2 | /** |
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| 3 | * Handles download requests based on logic provided by the callback function. |
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| 4 | * @param array $request Information about HTTP request |
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| 5 | * @param string $callback Function that provides the logic for the download process. |
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| 6 | * @return void |
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| 7 | * @license http://www.gnu.org/copyleft/gpl.html GPL |
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| 8 | * @package Workflow |
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| 9 | * @subpackage local |
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| 10 | * @access public |
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| 11 | */ |
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| 12 | function wf_handle_download($request, $callback) |
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| 13 | { |
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| 14 | /* check if it is in download mode */ |
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| 15 | if (!isset($request['download_mode'])) |
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| 16 | return; |
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| 17 | else |
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| 18 | if ($request['download_mode'] != "true") |
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| 19 | return; |
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| 20 | |
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| 21 | /* verify if the callback function exists and is callable */ |
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| 22 | if ((function_exists($callback)) && (is_callable($callback))) |
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| 23 | { |
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| 24 | /* prepare the parameters */ |
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| 25 | $params = array(); |
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| 26 | foreach ($request as $key => $value) |
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| 27 | $params[$key] = $value; |
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| 28 | |
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| 29 | /* call the callback function and await the result */ |
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| 30 | $fileResult = call_user_func($callback, $params); |
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| 31 | |
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| 32 | /* if everything is ok, then proceed with the download of the file */ |
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| 33 | if (!is_null($fileResult)) |
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| 34 | { |
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| 35 | if (isset($fileResult['filename']) && isset($fileResult['content'])) |
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| 36 | { |
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[5921] | 37 | if (preg_match('/Opera(\/| )([0-9].[0-9]{1,2})/', $_SERVER['HTTP_USER_AGENT'])) |
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[795] | 38 | $UserBrowser = "Opera"; |
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[5921] | 39 | elseif (preg_match('/MSIE ([0-9].[0-9]{1,2})/', $_SERVER['HTTP_USER_AGENT'])) |
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[795] | 40 | $UserBrowser = "IE"; |
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| 41 | else |
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| 42 | $UserBrowser = ''; |
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| 43 | |
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| 44 | $mime_type = ($UserBrowser == 'IE' || $UserBrowser == 'Opera') ? 'application/octetstream' : 'application/octet-stream'; |
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| 45 | header("Pragma: public"); |
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| 46 | header("Cache-Control: cache, must-revalidate"); |
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| 47 | header("Content-Type: application/force-download"); |
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| 48 | header("Content-Disposition: attachment; filename=\"" . $fileResult['filename'] . "\""); |
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| 49 | header('Pragma: no-cache'); |
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| 50 | header("Expires: 0"); |
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| 51 | header("Content-length: " . strlen($fileResult['content'])); |
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| 52 | echo $fileResult['content']; |
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| 53 | die(); |
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| 54 | } |
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| 55 | } |
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| 56 | else |
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| 57 | die(); |
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| 58 | } |
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| 59 | } |
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| 60 | ?> |
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