Node.js获取文件扩展名 [英] Node.js get file extension

问题描述

我在node.js中使用express 3创建文件上传功能。

Im creating a file upload function in node.js with express 3.

我想获取图像的文件扩展名。所以我可以重命名该文件，然后将文件扩展名附加到它。

I would like to grab the file extension of the image. so i can rename the file and then append the file extension to it.

app.post('/upload', function(req, res, next) {
    var is = fs.createReadStream(req.files.upload.path),
        fileExt = >>>> I want to get the extension of the image here <<<<,
        os = fs.createWriteStream('public/images/users/' + req.session.adress + '.' + fileExt);
});

如何在node.js中获取图像的扩展名？

How can i get the extension of the image in node.js?

推荐答案

我相信您可以执行以下操作来获取文件名的扩展名。

I believe you can do the following to get the extension of a file name.

var path = require('path')

path.extname('index.html')
// returns
'.html'

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