PR for #2701

main/inc/lib/document.lib.php

@@ -285,7 +285,79 @@ class DocumentManager
 
         return 'application/octet-stream';
     }
-
+	 /**
+     * This function smart streams a file to the client.
+     *
+     * @param string $full_file_name
+     * @param string $filename
+     * @param string $contentType
+     *
+     * @return false if file doesn't exist, true if stream succeeded
+     */
+	public static function smartReadFile($full_file_name, $filename, $contentType = 'application/octet-stream')
+	{
+	if (!file_exists($full_file_name))
+	{
+		header ("HTTP/1.1 404 Not Found");
+		return;
+	}
+	
+	$size	= filesize($full_file_name);
+	$time	= date('r', filemtime($full_file_name));
+	
+	$fm		= @fopen($full_file_name, 'rb');
+	if (!$fm)
+	{
+		header ("HTTP/1.1 505 Internal server error");
+		return;
+	}
+	
+	$begin	= 0;
+	$end	= $size - 1;
+	
+	if (isset($_SERVER['HTTP_RANGE']))
+	{
+		if (preg_match('/bytes=\h*(\d+)-(\d*)[\D.*]?/i', $_SERVER['HTTP_RANGE'], $matches))
+		{
+			$begin	= intval($matches[1]);
+			if (!empty($matches[2]))
+			{
+				$end	= intval($matches[2]);
+			}
+		}
+	}
+
+	if (isset($_SERVER['HTTP_RANGE']))
+	{
+		header('HTTP/1.1 206 Partial Content');
+	}
+	else
+	{
+		header('HTTP/1.1 200 OK');
+	}
+	
+	header("Content-Type: $contentType"); 
+	header('Cache-Control: public, must-revalidate, max-age=0');
+	header('Pragma: no-cache');  
+	header('Accept-Ranges: bytes');
+	header('Content-Length:' . (($end - $begin) + 1));
+	if (isset($_SERVER['HTTP_RANGE']))
+	{
+		header("Content-Range: bytes $begin-$end/$size");
+	}
+	header("Content-Disposition: inline; filename=$filename");
+	header("Content-Transfer-Encoding: binary");
+	header("Last-Modified: $time");
+	
+	$cur	= $begin;
+	fseek($fm, $begin, 0);
+	
+	while(!feof($fm) && $cur <= $end && (connection_status() == 0))
+	{
+		print fread($fm, min(1024 * 16, ($end - $cur) + 1));
+		$cur += 1024 * 16;
+	}
+}
     /**
      * This function streams a file to the client.
      *
@@ -382,6 +454,16 @@ class DocumentManager
                         }
                     }
                     break;
+				case 'video/mp4':
+				case 'audio/mpeg':
+				case 'audio/mp4':
+				case 'audio/ogg':
+				case 'audio/webm':
+				case 'audio/wav':
+				case 'video/ogg':
+				case 'video/webm':		
+					self::smartReadFile($full_file_name,$filename,$contentType);
+					break;
                 case 'application/vnd.dwg':
                 case 'application/vnd.dwf':
                     header('Content-type: application/octet-stream');