Limit download speed using PHP

user_473908 0
Viewed 24865

I found on Google some PHP scripts to limit the download speed of a file, but the file download at 10 Mbps or if it download at 80 kbps as i set it, after 5 mb, it stops downloading.

Can some one tell me where I can found a good PHP download speed limit script please?

Thank you very much

--- Edit ---

Here is the code :

<?php
set_time_limit(0);
// change this value below
$cs_conn = mysql_connect('localhost', 'root', '');
mysql_select_db('shareit', $cs_conn);

// local file that should be send to the client
$local_file = $_GET['file'];
// filename that the user gets as default
$download_file = $_GET['file'];

// set the download rate limit (=> 20,5 kb/s)
$download_rate = 85; 
if(file_exists($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!');
}




if ($dl) {
} else {
    header('HTTP/1.0 503 Service Unavailable');
    die('Abort, you reached your download limit for this file.');
}
?>
download php performance
8 Answers

I plan on making a script that gives a differentiated answer to this question. I'm going to allow for acceleration as it becomes less and less a file. I can show you my math here and you can use it in the same way I do.

x=2
l = filesize/x
n = | current_tangent_point - %_finished |
m = l*2 + n*2
P = m
L0 = P/2
L1 = L0 + n/2
L1 is the first derived answer to the question

This is as good as it gets

Now plugin L1 for x

Divide the two answers first over the second

That's a perfect gradient of speed.

I even made that equation myself. I hope to get published one day.

user_27186420

this code worked for me

<?php

$file_to_download = '1.mp3';
$client_file = '1.mp3';

$download_rate = 200; // 200Kb/s

$f = null;

try {
    if (!file_exists($file_to_download)) {
        throw new Exception('File ' . $file_to_download . ' does not exist');
    }

    if (!is_file($file_to_download)) {
        throw new Exception('File ' . $file_to_download . ' is not valid');
    }

    header('Cache-control: private');
    header('Content-Type: application/octet-stream');
    header('Content-Length: ' . filesize($file_to_download));
    header('Content-Disposition: filename=' . $client_file);

    // flush the content to the web browser
    flush();

    $f = fopen($file_to_download, 'r');

    while (!feof($f)) {
        // send the file part to the web browser
        print fread($f, round($download_rate * 1024));

        // flush the content to the web browser
        flush();

        // sleep one second
        sleep(1);
    }
} catch (\Throwable $e) {
    echo $e->getMessage();
} finally {
    if ($f) {
        fclose($f);
    }
}
user_137795740
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