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-rw-r--r--system/helpers/download_helper.php93
1 files changed, 52 insertions, 41 deletions
diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php
index 4a1a79cc3..8b87f8179 100644
--- a/system/helpers/download_helper.php
+++ b/system/helpers/download_helper.php
@@ -1,13 +1,13 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP 5.2.4 or newer
*
* NOTICE OF LICENSE
- *
+ *
* Licensed under the Open Software License version 3.0
- *
+ *
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
@@ -25,8 +25,6 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
/**
* CodeIgniter Download Helpers
*
@@ -44,76 +42,89 @@
*
* Generates headers that force a download to happen
*
- * @access public
* @param string filename
* @param mixed the data to be downloaded
+ * @param bool wether to try and send the actual file MIME type
* @return void
*/
if ( ! function_exists('force_download'))
{
- function force_download($filename = '', $data = '')
+ function force_download($filename = '', $data = '', $set_mime = FALSE)
{
if ($filename == '' OR $data == '')
{
return FALSE;
}
- // Try to determine if the filename includes a file extension.
- // We need it in order to set the MIME type
- if (FALSE === strpos($filename, '.'))
- {
- return FALSE;
- }
+ // Set the default MIME type to send
+ $mime = 'application/octet-stream';
- // Grab the file extension
$x = explode('.', $filename);
$extension = end($x);
- // Load the mime types
- if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes.php'))
- {
- include(APPPATH.'config/'.ENVIRONMENT.'/mimes.php');
- }
- elseif (is_file(APPPATH.'config/mimes.php'))
+ if ($set_mime === TRUE)
{
- include(APPPATH.'config/mimes.php');
- }
+ if (count($x) === 1 OR $extension === '')
+ {
+ /* If we're going to detect the MIME type,
+ * we'll need a file extension.
+ */
+ return FALSE;
+ }
- // Set a default mime if we can't find it
- if ( ! isset($mimes[$extension]))
- {
- $mime = 'application/octet-stream';
+ // Load the mime types
+ if (defined('ENVIRONMENT') && is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes.php'))
+ {
+ include(APPPATH.'config/'.ENVIRONMENT.'/mimes.php');
+ }
+ elseif (is_file(APPPATH.'config/mimes.php'))
+ {
+ include(APPPATH.'config/mimes.php');
+ }
+
+ // Only change the default MIME if we can find one
+ if (isset($mimes[$extension]))
+ {
+ $mime = is_array($mimes[$extension]) ? $mimes[$extension][0] : $mimes[$extension];
+ }
}
- else
+
+ /* It was reported that browsers on Android 2.1 (and possibly older as well)
+ * need to have the filename extension upper-cased in order to be able to
+ * download it.
+ *
+ * Reference: http://digiblog.de/2011/04/19/android-and-the-download-file-headers/
+ */
+ if (count($x) !== 1 && isset($_SERVER['HTTP_USER_AGENT']) && preg_match('/Android\s(1|2\.[01])/', $_SERVER['HTTP_USER_AGENT']))
{
- $mime = (is_array($mimes[$extension])) ? $mimes[$extension][0] : $mimes[$extension];
+ $x[count($x) - 1] = strtoupper($extension);
+ $filename = implode('.', $x);
}
+
+ // Clean output buffer
+ ob_clean();
// Generate the server headers
- if (strpos($_SERVER['HTTP_USER_AGENT'], "MSIE") !== FALSE)
+ header('Content-Type: '.$mime);
+ header('Content-Disposition: attachment; filename="'.$filename.'"');
+ header('Expires: 0');
+ header('Content-Transfer-Encoding: binary');
+ header('Content-Length: '.strlen($data));
+
+ // Internet Explorer-specific headers
+ if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE)
{
- header('Content-Type: "'.$mime.'"');
- header('Content-Disposition: attachment; filename="'.$filename.'"');
- header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
- header("Content-Transfer-Encoding: binary");
header('Pragma: public');
- header("Content-Length: ".strlen($data));
}
else
{
- header('Content-Type: "'.$mime.'"');
- header('Content-Disposition: attachment; filename="'.$filename.'"');
- header("Content-Transfer-Encoding: binary");
- header('Expires: 0');
header('Pragma: no-cache');
- header("Content-Length: ".strlen($data));
}
exit($data);
}
}
-
/* End of file download_helper.php */
/* Location: ./system/helpers/download_helper.php */ \ No newline at end of file