如何为这个php脚本添加下载速度限制


How can I add a download speed limit to this php script?

我发现了一个很棒的脚本,可以从以下目录下载和保护文件:

http://www.gowondesigns.com/?page.getfile

我也从一个网站上看到了这个代码:

// local file that should be send to the client
$local_file = 'test-file.zip';
// filename that the user gets as default
$download_file = 'your-download-name.zip';
// set the download rate limit (=> 20,5 kb/s)
$download_rate = 20.5;
if(file_exists($local_file) && is_file($local_file)) {

// send headers
header('Cache-control: private');
header('Content-Type: application/octet-stream');
header('Content-Length: '.filesize($local_file));
header('Content-Disposition: filename='.$download_file);
// flush content
flush();
// open file stream
$file = fopen($local_file, "r");
while (!feof($file)) {
    // send the current file part to the browser
    print fread($file, round($download_rate * 1024));
    // flush the content to the browser
    flush();
    // sleep one second
    sleep(1);
}
// close file stream
fclose($file);

}
else {
    die('Error: The file '.$local_file.' does not exist!');
}

我如何将它们组合在一起?我的意思是,我如何使用getfile脚本并为其添加下载速率?

我试着添加:

while (!feof($file)) {
    // send the current file part to the browser
    print fread($file, round($download_rate * 1024));
    // flush the content to the browser
    flush();
    // sleep one second
    sleep(1);
}

但我认为应该是$fd,而不是$file,我没有得到积极的结果

我做错了什么?

根据您的评论-我认为您想要以下内容:

// open file stream
$file = fopen($local_file, "r");
while (!feof($file)) {
    // send the current file part to the browser
    print fread($file, round($download_rate * 1024));
    // flush the content to the browser
    flush();
    // sleep one second
    sleep(1);
}
// close file stream
fclose($file);

但是,您应该注意,正是整个脚本成功地提示用户下载文件并限制速度。只需将问题中的第一个脚本重命名为download.php,然后将其链接为<a href='download.php?id=1'>Download 1</a>(然后文件ID 1将下载)。

<?php
$file_id = $_GET['id'];
if($file_id == 1){
    // local file that should be send to the client
    $local_file = 'test-file.zip';
    // filename that the user gets as default
    $download_file = 'your-download-name.zip';
} else {
    die('Invalid file selected for download');
}
// set the download rate limit (=> 20,5 kb/s)
$download_rate = 20.5;
if(file_exists($local_file) && is_file($local_file)) {
    // send headers
    header('Cache-control: private');
    header('Content-Type: application/octet-stream');
    header('Content-Length: '.filesize($local_file));
    header('Content-Disposition: filename='.$download_file);
    // flush content
    flush();
    // open file stream
    $file = fopen($local_file, "r");
    while (!feof($file)) {
        // send the current file part to the browser
        print fread($file, round($download_rate * 1024));
        // flush the content to the browser
        flush();
        // sleep one second
        sleep(1);
    }
    // close file stream
    fclose($file);
} else {
    die('Error: The file '.$local_file.' does not exist!');
}
?>
<?php
$file =  @$_GET["file"];
$rate = 100;  //  kb/sn
if (!file_exists($file)) {die("File Not Found");}
header("Content-Disposition: attachment; filename=" . $file);    
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
header("Content-Description: File Transfer");             
header("Content-Length: " . filesize($file));
flush(); // this doesn't really matter.
$fp = fopen($file, "r"); 
while (!feof($fp))
{
    echo fread($fp, $rate * 1024); 
    flush(); 
    sleep(1);
}  
fclose($fp); 
?>

我用这个。没问题。