您想要从远程服务器获取文件并将其提供给您的用户。以下是获取和服务代理示例代码。我希望您知道文件名、URL、文件扩展名和 MIME 类型
<?php
function get_size($url) {
$my_ch = curl_init();
curl_setopt($my_ch, CURLOPT_URL,$url);
curl_setopt($my_ch, CURLOPT_HEADER, true);
curl_setopt($my_ch, CURLOPT_NOBODY, true);
curl_setopt($my_ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($my_ch, CURLOPT_TIMEOUT, 10);
$r = curl_exec($my_ch);
foreach(explode("\n", $r) as $header) {
if(strpos($header, 'Content-Length:') === 0) {
return trim(substr($header,16));
}
}
return '';
}
// Set operation params
$mime = filter_var($_GET['mime']);
$ext = str_replace(array('/', 'x-'), '', strstr($mime, '/'));
$url = base64_decode(filter_var($_GET['url']));
$name = urldecode($_GET['title']). '.' .$ext;
// Fetch and serve
if ($url)
{
$size=get_size($url);
// Generate the server headers
if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE)
{
header('Content-Type: "' . $mime . '"');
header('Content-Disposition: attachment; filename="' . $name . '"');
header('Expires: 0');
header('Content-Length: '.$size);
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header("Content-Transfer-Encoding: binary");
header('Pragma: public');
}
else
{
header('Content-Type: "' . $mime . '"');
header('Content-Disposition: attachment; filename="' . $name . '"');
header("Content-Transfer-Encoding: binary");
header('Expires: 0');
header('Content-Length: '.$size);
header('Pragma: no-cache');
}
readfile($url);
exit;
}
// Not found
exit('File not found');
?>
用法:直接另存为download.php
并像这样打电话
$encoded_url = base64_encode($file_to_download_url);
$download_url = 'http://www.example.com/download.php?mime='.$mime.'&title='.$title.'&url='.$encoded_url;
它会像魅力一样发挥作用!