如何向此php脚本添加下载速度限制? [英] How can I add a download speed limit to this php script?
问题描述
我发现了一个很棒的脚本,可以从目录下载并保护文件:
I found this great script to download and protect the files from a directory:
http://www.gowondesigns.com/?page.getfile
我也从网站上看到了此代码:
And I saw this code from a website too:
// 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 '.$local_file.' does not exist!');
}
如何合并它们?我的意思是我该如何使用getfile脚本并为其添加下载速率?
How can I combine them? I mean how can I use the getfile script and add a download rate to it?
我尝试添加:
while (!feof($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);
}
但是我认为应该是$ fd而不是$ file,但我没有任何积极的结果
But instead of $file I think it should be $fd and I had no positive results
我在做什么错了?
推荐答案
根据您的评论-我假设您需要以下内容:
Based on your comment - I assume you want the following:
// 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,您应该注意的是,整个脚本将使其成功提示用户下载文件并对其进行速度限制.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>
(然后将下载文件ID 1).
You should note, however, that it is the whole script that will make it successfully prompt a user to download the file and speed limit it. Simply rename the first script in your question as download.php, then link to it as <a href='download.php?id=1'>Download 1</a>
(then file ID 1 will download).
<?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!');
}
?>
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