php下载远程大文件(获取远程文件大小)

来源:转载

<?php

// 暂不支持断点续传

// $url = 'http://www.mytest.com/debian.iso'; 不知道为何获取本地文件大小为0

$url = 'http://192.168.8.93/download/vm-672/18/0.vmdk';

$file = basename($url);

$header = get_headers($url, 1);

$size = $header['Content-Length'];

$fp = fopen($url, 'rb');

if ($fp === false) exit('文件不存在或打开失败');

header('Content-Description: File Transfer');

header('Content-Type: application/octet-stream');

header('Content-Disposition: attachment; filename="'.$file.'"');

header('Content-Transfer-Encoding: binary');

header('Expires: 0');

header('Cache-Control: must-revalidate, post-check=0, pre-check=0');

header('Pragma: public');

header('Content-Length: ' . $size);

ob_clean();

ob_end_flush();

set_time_limit(0);

$chunkSize = 1024 * 1024;

while (!feof($fp)) {

$buffer = fread($fp, $chunkSize);

echo $buffer;

ob_flush();

flush();

}

fclose($fp);

exit;

 

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