doulai6469 2014-03-04 08:15
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php恢复idm的容量

My code is this in php file for downloading any file but resume capability showing unknown plz can u suggest me the code for that functionality

its my php page to download a file, have to change code or what to do for changing resume capability in idm ?

       if(!isset($_SESSION['user_id'])){
       header('location:../index.php');}
       $uname=$_SESSION['uname'];
       $uid= $_SESSION['user_id'];
     function output_file($file, $name, $mime_type='')
     {
/*
This function takes a path to a file to output ($file),  the filename that the browser will see ($name) and  the MIME type of the file ($mime_type, optional).
*/

//Check the file premission
//if(!is_readable($file)) die('File not found or inaccessible!');

$size = filesize($file);
$name = rawurldecode($name);

/* Figure out the MIME type | Check in array */
$known_mime_types=array(
    "pdf" => "application/pdf",
    "txt" => "text/plain",
    "html" => "text/html",
    "htm" => "text/html",
    "exe" => "application/octet-stream",
    "zip" => "application/zip",
    "doc" => "application/msword",
    "xls" => "application/vnd.ms-excel",
    "ppt" => "application/vnd.ms-powerpoint",
    "gif" => "image/gif",
    "png" => "image/png",
    "jpeg"=> "image/jpg",
    "jpg" =>  "image/jpg",
    "php" => "text/plain"
);

if($mime_type==''){
    $file_extension = strtolower(substr(strrchr($file,"."),1));
    if(array_key_exists($file_extension, $known_mime_types)){
        $mime_type=$known_mime_types[$file_extension];
    } else {
        $mime_type="application/force-download";
    };
};

//turn off output buffering to decrease cpu usage
@ob_end_clean(); 

// required for IE, otherwise Content-Disposition may be ignored
if(ini_get('zlib.output_compression'))
ini_set('zlib.output_compression', 'Off');

header('Content-Type: ' . $mime_type);
header('Content-Disposition: attachment; filename="'.$name.'"');
header("Content-Transfer-Encoding: binary");
header('Accept-Ranges: bytes');
header('Content-Length: 2052595');
header('Content-Range: bytes 339843-2392437/2392438');

/* The three lines below basically make the 
    download non-cacheable */
header("Cache-control: private");
header('Pragma: private');
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");

// multipart-download and download resuming support
if(isset($_SERVER['HTTP_RANGE']))
{
    list($a, $range) = explode("=",$_SERVER['HTTP_RANGE'],2);
    list($range) = explode(",",$range,2);
    list($range, $range_end) = explode("-", $range);
    $range=intval($range);
    if(!$range_end) {
        $range_end=$size-1;
    } else {
        $range_end=intval($range_end);
 }

$new_length = $range_end-$range+1;
header("HTTP/1.1 206 Partial Content");
header("Content-Length: $new_length");
header("Content-Range: bytes $range-$range_end/$size");
} else {
    $new_length=$size;
    header("Content-Length: ".$size);
}

/* Will output the file itself */
$chunksize = 3*(1024*1024); //you may want to change this
$bytes_send = 0;
if ($file = fopen($file, 'r'))
{
    if(isset($_SERVER['HTTP_RANGE']))
    fseek($file, $range);

while(!feof($file) && 
(!connection_aborted()) && 
    ($bytes_send<$new_length)
      )
{
$buffer = fread($file, $chunksize);
    print($buffer); //echo($buffer); // can also possible
    flush();
    $bytes_send += strlen($buffer);
}
fclose($file);
} else
//If no permissiion
die('Error - can not open file.');
//die
die();
}
//Set the time out
set_time_limit(0);
$temp = explode("\\", $_REQUEST['filename']);

//path to the file
$file_path=$_REQUEST['filename'];


//Call the download function with file path,file name and file type
output_file($file_path, ''.$temp[3].'', 'text/plain');


     ?>
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2条回答 默认 最新

  • dongyou2635 2014-03-04 09:45
    关注

    Please see the RFC on headers on how to report your capabilities to your clients:

    http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html

    14.5 Accept-Ranges

    The Accept-Ranges response-header field allows the server to indicate its acceptance of range requests for a resource:

          Accept-Ranges     = "Accept-Ranges" ":" acceptable-ranges
          acceptable-ranges = 1#range-unit | "none"
    

    Origin servers that accept byte-range requests MAY send

          Accept-Ranges: bytes
    

    but are not required to do so. Clients MAY generate byte-range requests without having received this header for the resource involved. Range units are defined in section 3.12.

    Servers that do not accept any kind of range request for a resource MAY send

          Accept-Ranges: none
    

    to advise the client not to attempt a range request.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
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