Refresh kohana from upstream svn trunk r3771.

During this process, remove a considerable number of files from kohana
that we will not be needing in Gallery3, including the following files
and directories:
    kohana/application
    kohana/example.htaccess
    kohana/index.php
    kohana/install.php
    kohana/kohana.png
    kohana/modules/archive
    kohana/modules/auth
    kohana/modules/flot
    kohana/modules/gmaps
    kohana/modules/kodoc
    kohana/modules/payment
    kohana/modules/smarty
    kohana/modules/unit_test/i18n
    kohana/modules/unit_test/tests/Example_Test.php
    kohana/modules/unit_test/tests/Valid_Test.php
    kohana/system/config/captcha.php
    kohana/system/controllers/captcha.php
    kohana/system/fonts
    kohana/system/i18n
    kohana/system/libraries/Calendar.php
    kohana/system/libraries/Calendar_Event.php
    kohana/system/libraries/Captcha.php
    kohana/system/libraries/Tagcloud.php
    kohana/system/vendor
    kohana/system/views/pagination
    kohana/system/views/kohana_calendar.php

1 files changed, 105 insertions, 0 deletions

diff --git a/kohana/helpers/download.php b/kohana/helpers/download.php
new file mode 100644
index 00000000..038ee790
--- /dev/null
+++ b/kohana/helpers/download.php
@@ -0,0 +1,105 @@
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+ * Download helper class.
+ *
+ * $Id$
+ *
+ * @package    Core
+ * @author     Kohana Team
+ * @copyright  (c) 2007-2008 Kohana Team
+ * @license    http://kohanaphp.com/license.html
+ */
+class download_Core {
+
+	/**
+	 * Force a download of a file to the user's browser. This function is
+	 * binary-safe and will work with any MIME type that Kohana is aware of.
+	 *
+	 * @param   string  a file path or file name
+	 * @param   mixed   data to be sent if the filename does not exist
+	 * @param   string  suggested filename to display in the download
+	 * @return  void
+	 */
+	public static function force($filename = NULL, $data = NULL, $nicename = NULL)
+	{
+		if (empty($filename))
+			return FALSE;
+
+		if (is_file($filename))
+		{
+			// Get the real path
+			$filepath = str_replace('\\', '/', realpath($filename));
+
+			// Set filesize
+			$filesize = filesize($filepath);
+
+			// Get filename
+			$filename = substr(strrchr('/'.$filepath, '/'), 1);
+
+			// Get extension
+			$extension = strtolower(substr(strrchr($filepath, '.'), 1));
+		}
+		else
+		{
+			// Get filesize
+			$filesize = strlen($data);
+
+			// Make sure the filename does not have directory info
+			$filename = substr(strrchr('/'.$filename, '/'), 1);
+
+			// Get extension
+			$extension = strtolower(substr(strrchr($filename, '.'), 1));
+		}
+
+		// Get the mime type of the file
+		$mime = Kohana::config('mimes.'.$extension);
+
+		if (empty($mime))
+		{
+			// Set a default mime if none was found
+			$mime = array('application/octet-stream');
+		}
+
+		// Generate the server headers
+		header('Content-Type: '.$mime[0]);
+		header('Content-Disposition: attachment; filename="'.(empty($nicename) ? $filename : $nicename).'"');
+		header('Content-Transfer-Encoding: binary');
+		header('Content-Length: '.sprintf('%d', $filesize));
+
+		// More caching prevention
+		header('Expires: 0');
+
+		if (Kohana::user_agent('browser') === 'Internet Explorer')
+		{
+			// Send IE headers
+			header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
+			header('Pragma: public');
+		}
+		else
+		{
+			// Send normal headers
+			header('Pragma: no-cache');
+		}
+
+		// Clear the output buffer
+		Kohana::close_buffers(FALSE);
+
+		if (isset($filepath))
+		{
+			// Open the file
+			$handle = fopen($filepath, 'rb');
+
+			// Send the file data
+			fpassthru($handle);
+
+			// Close the file
+			fclose($handle);
+		}
+		else
+		{
+			// Send the file data
+			echo $data;
+		}
+	}
+
+} // End download
\ No newline at end of file