.rar，.zip文件MIME类型 [英] .rar, .zip files MIME Type

问题描述

我正在开发一个简单的php上传脚本，用户只能上传ZIP和RAR文件.

I'm developing a simple php upload script, and users can upload only ZIP and RAR files.

我应该使用哪些MIME类型检查$_FILES[x][type]? (请提供完整列表)

What MIME types I should use to check $_FILES[x][type]? (a complete list please)

谢谢..

推荐答案

freedompeace，Kiyarash和Sam Vloeberghs的回答:

The answers from freedompeace, Kiyarash and Sam Vloeberghs:

.rar    application/x-rar-compressed, application/octet-stream
.zip    application/zip, application/octet-stream, application/x-zip-compressed, multipart/x-zip

我也会检查文件名.这是检查文件是RAR还是ZIP文件的方法.我通过创建一个快速的命令行应用程序对其进行了测试.

I would do a check on the file name too. Here is how you could check if the file is a RAR or ZIP file. I tested it by creating a quick command line application.

<?php

if (isRarOrZip($argv[1])) {
    echo 'It is probably a RAR or ZIP file.';
} else {
    echo 'It is probably not a RAR or ZIP file.';
}

function isRarOrZip($file) {
    // get the first 7 bytes
    $bytes = file_get_contents($file, FALSE, NULL, 0, 7);
    $ext = strtolower(substr($file, - 4));

    // RAR magic number: Rar!\x1A\x07\x00
    // http://en.wikipedia.org/wiki/RAR
    if ($ext == '.rar' and bin2hex($bytes) == '526172211a0700') {
        return TRUE;
    }

    // ZIP magic number: none, though PK\003\004, PK\005\006 (empty archive), 
    // or PK\007\008 (spanned archive) are common.
    // http://en.wikipedia.org/wiki/ZIP_(file_format)
    if ($ext == '.zip' and substr($bytes, 0, 2) == 'PK') {
        return TRUE;
    }

    return FALSE;
}

请注意，仍不能100％确定，但它可能已经足够好了.

Notice that it still won't be 100% certain, but it is probably good enough.

$ rar.exe l somefile.zip
somefile.zip is not RAR archive

但是，即使WinRAR也将非RAR文件检测为SFX存档:

But even WinRAR detects non RAR files as SFX archives:

$ rar.exe l somefile.srr
SFX Volume somefile.srr

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