PHP PHP下载任何文件大小的脚本

Posted 2021-05-15

<?php

// Use PHP to serve files too big for Apache to deliver (>2GB)
function serveFile($file){
    if (file_exists($file)){
        $path_parts = pathinfo($file);
        $as = $path_parts['basename'];
        // Exec to determine correct file size (see's bigger files than PHP can see)
        $size = trim(`stat -c%s "$file"`);
        set_time_limit(0);

        header("Expires: Mon, 1 Jan 2010 01:00:00 GMT");
        header("Pragma: no-cache");
        header("Cache-Control: private");
        header("Content-Description: File Download");
        header("Content-Type: application/octet-stream");
        header("Content-Disposition: attachment; filename=\"".urlencode($as)."\"");
        header("Content-Length: $size");
        header("Content-Transfer-Encoding: binary");

        flush();
        $fp = popen("cat \"$file\" 2>&1", "r");
        while(!feof($fp))
        {
            // send the current file part to the browser
            print fread($fp, 1024);
            // flush the content to the browser
            flush();
        }
        fclose($fp);
    } else {
        header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
        print "File not found";
    }
}

$file = "../" . str_replace(array("/d/", "?f=","../"), "", trim(urldecode($_SERVER['REQUEST_URI'])));

// If the last character of the URL is & then trigger for Download
if (substr($_SERVER['REQUEST_URI'], -1) == "&"){
    $download = true;
    // Strip off & from the end of the $file variable
    $file = substr_replace($file, '', strlen($file)-1, 1);
}else{
    $download = false;
}

if (isset($_GET['f']) && $download == false){
    if (file_exists($file)){
        $size = number_format(trim(`stat -c%s "$file"`));
        $path_parts = pathinfo($file);
        $url_path = str_replace(array(" ","../"), array("%20",""), $file);
        print "Click to download <a href=\"/d/?f=".$url_path."&\">".$path_parts['basename']."</a>";
        print " (".$size." bytes)";
    } else {
        header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
        print "File not found";
    }
} else {
    serveFile($file);
}

?>