1 files changed, 11 insertions, 5 deletions
diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php
index 3701e0b8b..a6463dfd7 100644
--- a/system/helpers/download_helper.php
+++ b/system/helpers/download_helper.php
@@ -121,6 +121,11 @@ if ( ! function_exists('force_download'))
 			$filename = implode('.', $x);
 		}
 
+		if ($data === NULL && ($fp = @fopen($filepath, 'rb')) === FALSE)
+		{
+			return;
+		}
+
 		// Clean output buffer
 		if (ob_get_level() !== 0 && @ob_end_clean() === FALSE)
 		{
@@ -141,12 +146,13 @@ if ( ! function_exists('force_download'))
 			exit($data);
 		}
 
-		// Flush the file
-        if (@readfile($filepath) === FALSE)
-        {
-            return;
-        }
+		// Flush 1MB chunks of data
+		while ( ! feof($fp) && ($data = fread($fp, 1048576)) !== FALSE)
+		{
+			echo $data;
+		}
 
+		fclose($fp);
 		exit;
 	}
 }