用php脚本下载- .rar变成mac上的.rar.html

Question

我从php脚本开始下载，它非常简单，如下所示：

$dir = 'downloads/';
$type = 'application/x-rar-compressed, application/octet-stream, application/zip';

function makeDownload($file, $dir, $type) 
{   
    header("Content-Type: $type");
    header("Content-Disposition: attachment; filename=\"$file\"");
    readfile($dir.$file);
}

if(!empty($_GET['file']) && !preg_match('=/=', $_GET['file'])) {
    if(file_exists ($dir.$_GET['file']))     {
        makeDownload($_GET['file'], $dir, $type);
    }

}

它在win7 + ff/opera/chrome/safari上运行良好，但在MAC上它尝试下载file.rar.html或file.zip.html，而不是file.rar/file.zip。

知道为什么吗？

提前感谢

Answer 1

“application/x压缩的应用程序/八位流，application/zip”不是有效的文件类型。您需要在脚本中添加逻辑以检测文件类型，然后提供特定的文件类型。示例(未经测试)：

<?php
$dir = 'downloads/';

function makeDownload($file, $dir) 
{   
    switch(strtolower(end(explode(".", $file)))) {
      case "zip": $type = "application/zip"; break;
      case "rar": $type = "application/x-rar-compressed"; break;
      default: $type = "application/octet-stream";
    }
    header("Content-Type: $type");
    header("Content-Disposition: attachment; filename=\"$file\"");
    readfile($dir.$file);
    exit; // you should exit here to prevent the file from becoming corrupted if anything else gets echo'd after this function was called.
}

if(!empty($_GET['file']) && !preg_match('=/=', $_GET['file'])) {
    if(file_exists ($dir.$_GET['file']))     {
        makeDownload($_GET['file'], $dir);
    }

}
?>