diff options
Diffstat (limited to 'system/helpers/download_helper.php')
| -rw-r--r-- | system/helpers/download_helper.php | 52 |
1 files changed, 44 insertions, 8 deletions
diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php index 09c4de578..31652d53e 100644 --- a/system/helpers/download_helper.php +++ b/system/helpers/download_helper.php @@ -1,4 +1,4 @@ -<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); +<?php /** * CodeIgniter * @@ -24,6 +24,7 @@ * @since Version 1.0 * @filesource */ +defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Download Helpers @@ -55,6 +56,23 @@ if ( ! function_exists('force_download')) { return FALSE; } + elseif ($data === NULL) + { + if (@is_file($filename) && @file_exists($filename) && ($filesize = @filesize($filename)) !== FALSE) + { + $filepath = $filename; + $filename = explode('/', str_replace(DIRECTORY_SEPARATOR, '/', $filename)); + $filename = end($filename); + } + else + { + return FALSE; + } + } + else + { + $filesize = strlen($data); + } // Set the default MIME type to send $mime = 'application/octet-stream'; @@ -94,28 +112,46 @@ if ( ! function_exists('force_download')) $filename = implode('.', $x); } + if ($data === NULL && ($fp = @fopen($filepath, 'rb')) === FALSE) + { + return FALSE; + } + // Clean output buffer - ob_clean(); + if (ob_get_level() !== 0 && @ob_end_clean() === FALSE) + { + ob_clean(); + } // Generate the server headers header('Content-Type: '.$mime); header('Content-Disposition: attachment; filename="'.$filename.'"'); header('Expires: 0'); header('Content-Transfer-Encoding: binary'); - header('Content-Length: '.strlen($data)); + header('Content-Length: '.$filesize); // Internet Explorer-specific headers if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) { - header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); - header('Pragma: public'); + header('Cache-Control: no-cache, no-store, must-revalidate'); } - else + + header('Pragma: no-cache'); + + // If we have raw data - just dump it + if ($data !== NULL) + { + exit($data); + } + + // Flush 1MB chunks of data + while ( ! feof($fp) && ($data = fread($fp, 1048576)) !== FALSE) { - header('Pragma: no-cache'); + echo $data; } - exit($data); + fclose($fp); + exit; } } |