在浏览器中检查是否已安装torrent-client [英] Check in browser is torrent-client installed

问题描述

javascript中是否有方法检查浏览器是否支持磁力链接(=检查用户计算机上是否安装了torrent客户端)?

Is there a way in javascript to check if magnet link is supported by browser (= to check if torrent client is installed on user's pc)?

我想通过JavaScript检查浏览器是否通过单击磁铁链接打开torrent客户端，或者我需要显示一些其他说明(如果未安装torrent客户端).

I want to check via javascript if browser opens torrent client by clicking on magnet link or I need to show some additional instructions (if torrent client is not installed).

推荐答案

作为浏览器，它无法访问操作系统中已安装的应用程序，但是它具有访问受支持的MIME类型列表的权限.

Being a Browser, it has no access to installed applications in the OS, but what it does have is access to a list of supported MIME types.

在JavaScript中，您可以按以下方式进行检查:

In JavaScript you can check it as follows:

var mimeCheck = function (type) {
    return Array.prototype.some.call(navigator.plugins, function (plugin) {
        return Array.prototype.some.call(plugin, function (mime) {
            return mime.type == type;
        });
    });
};

感谢此先前提出的问题.

这是小提琴 我使用的MIME类型是 application/x-bittorrent

Here is a fiddle The MIME type I use is application/x-bittorrent

如@HaukurHaf所指出的，只有在客户端在浏览器本身中为torrent安装了扩展名的情况下，此方法才起作用.因此，对于某些客户端，这可能会返回true，也可能不会返回true.

As pointed out by @HaukurHaf, this will only work if the client has an extension installed for torrents in the browser itself. So this might or might not return true for some clients.

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