如何将视频文件字节流传输到Apache服务器的WWW文件夹之外

Question

在我的服务器（Apache）中，我有一些视频文件（.mp4），我直接在浏览器中在网站上播放。但视频文件放在ubuntu的/ var / www / videos文件夹中。现在，如果我将视频文件夹放在/ var文件夹（/ var / videos）中，则视频流不会发生。任何人都可以告诉我如何实现这个？我也尝试过字节流，但视频文件要么已损坏，要么不会发生字节流

以下是我尝试过的代码：

   <?php

function set_range($range, $filesize, &$first, &$last){
  /*
  Sets the first and last bytes of a range, given a range expressed as a string 
  and the size of the file.

  If the end of the range is not specified, or the end of the range is greater 
  than the length of the file, $last is set as the end of the file.

  If the begining of the range is not specified, the meaning of the value after 
  the dash is "get the last n bytes of the file".

  If $first is greater than $last, the range is not satisfiable, and we should 
  return a response with a status of 416 (Requested range not satisfiable).

  Examples:
  $range='0-499', $filesize=1000 => $first=0, $last=499 .
  $range='500-', $filesize=1000 => $first=500, $last=999 .
  $range='500-1200', $filesize=1000 => $first=500, $last=999 .
  $range='-200', $filesize=1000 => $first=800, $last=999 .

  */

  $dash=strpos($range,'-');
  $first=trim(substr($range,0,$dash));
  $last=trim(substr($range,$dash+1));
  if ($first=='') {

    $suffix=$last;
    $last=$filesize-1;
    $first=$filesize-$suffix;
    if($first<0) $first=0;
  } else {
    if ($last=='' || $last>$filesize-1) $last=$filesize-1;
  }
  if($first>$last){

    header("Status: 416 Requested range not satisfiable");
    header("Content-Range: */$filesize");
    exit;
  }
}

function buffered_read($file, $bytes, $buffer_size=1024){
  /*
  Outputs up to $bytes from the file $file to standard output, $buffer_size bytes at a time.
  */
  $bytes_left=$bytes;
  while($bytes_left>0 && !feof($file)){
    if($bytes_left>$buffer_size)
      $bytes_to_read=$buffer_size;
    else
      $bytes_to_read=$bytes_left;
    $bytes_left-=$bytes_to_read;
    $contents=fread($file, $bytes_to_read);
    echo $contents;
    flush();
  }
}

function byteserve($filename){
  /*
  Byteserves the file $filename.  

  When there is a request for a single range, the content is transmitted 
  with a Content-Range header, and a Content-Length header showing the number 
  of bytes actually transferred.

  When there is a request for multiple ranges, these are transmitted as a 
  multipart message. The multipart media type used for this purpose is 
  "multipart/byteranges".
  */

  $filesize=filesize($filename);
  $file=fopen($filename,"rb");

  $ranges=NULL;
  if ($_SERVER['REQUEST_METHOD']=='GET' && isset($_SERVER['HTTP_RANGE']) && $range=stristr(trim($_SERVER['HTTP_RANGE']),'bytes=')){
    $range=substr($range,6);
    $boundary='g45d64df96bmdf4sdgh45hf5';//set a random boundary
    $ranges=explode(',',$range);
  }

  if($ranges && count($ranges)){
    header("HTTP/1.1 206 Partial content");
    header("Accept-Ranges: bytes");
    if(count($ranges)>1){


      //compute content length
      $content_length=0;
      foreach ($ranges as $range){
        set_range($range, $filesize, $first, $last);
        $content_length+=strlen("\r\n--$boundary\r\n");
        $content_length+=strlen("Content-type: video/mp4\r\n");
        $content_length+=strlen("Content-range: bytes $first-$last/$filesize\r\n\r\n");
        $content_length+=$last-$first+1;          
      }
      $content_length+=strlen("\r\n--$boundary--\r\n");

      //output headers
      header("Content-Length: $content_length");

      header("Content-Type: multipart/x-byteranges; boundary=$boundary");


      foreach ($ranges as $range){
        set_range($range, $filesize, $first, $last);
        echo "\r\n--$boundary\r\n";
        echo "Content-type: video/mp4\r\n";
        echo "Content-range: bytes $first-$last/$filesize\r\n\r\n";
        fseek($file,$first);
        buffered_read ($file, $last-$first+1);          
      }
      echo "\r\n--$boundary--\r\n";
    } else {

      $range=$ranges[0];
      set_range($range, $filesize, $first, $last);  
      header("Content-Length: ".($last-$first+1) );
      header("Content-Range: bytes $first-$last/$filesize");
      header("Content-Type: video/mp4");  
      fseek($file,$first);
      buffered_read($file, $last-$first+1);
    }
  } else{

    header("Accept-Ranges: bytes");
    header("Content-Length: $filesize");
    header("Content-Type: video/mp4");
    readfile($filename);
  }
  fclose($file);
}

function serve($filename, $download=0){
  //Just serves the file without byteserving
  //if $download=true, then the save file dialog appears
  $filesize=filesize($filename);
  header("Content-Length: $filesize");
  header("Content-Type: video/mp4");
  $filename_parts=pathinfo($filename);
  if($download) header('Content-disposition: attachment; filename='.$filename_parts['basename']);
  readfile($filename);
}


set_magic_quotes_runtime(0);


ini_set('session.cache_limiter','none');



$filename='/var/videos/guruthva.mp4'; //this is the  file that will be byteserved
byteserve($filename); 

?>

提前致谢....