Read Range Chunks Chunked With Php

I have an input field where I paste a download url. After that, the I use an AJAX request to get the fileinfos such as headerinfo, content-length, mime type & in case I use cur

Solution 1:

I could get it to work with PHP curl's CURLOPT_WRITEFUNCTION callback setting. The following example callback function curl_write_flush intended for that curl option writes every chunk received and flushes the output to the browser.

<?php/**
 * CURLOPT_WRITEFUNCTION which flushes the output buffer and the SAPI buffer.
 *
 * @param resource $curl_handle
 * @param string   $chunk
 */functioncurl_write_flush($curl_handle, $chunk)
{ 
    echo$chunk;

    ob_flush(); // flush output buffer (Output Control configuration specific)
    flush();    // flush output body (SAPI specific)return strlen($chunk); // tell Curl there was output (if any).
};

$curl_handle = curl_init($_GET['url']);
curl_setopt($curl_handle, CURLOPT_RANGE, $_GET['range']);
curl_setopt($curl_handle, CURLOPT_BINARYTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_WRITEFUNCTION, 'curl_write_flush');
curl_exec($curl_handle);
curl_close($curl_handle);

I tried with small files and big files and it works great but you can't set custom chunk size.

Download stream is the same speed as I can get with my ISP.

If you have anything better i'm open for any answer.