我可以在Microsoft Azure的Node.JS中使用本机"fs"文件系统吗? [英] Can I use the native 'fs' filesystem in Node.JS on Microsoft Azure?

问题描述

我已经将一些功能不错的nodeJS代码部署到了Azure.它使用Jade视图引擎，通过fs文件库拉入模板:

I've deployed a functioning bit of nodeJS code to Azure. It uses the Jade view engine, pulling in template via the fs file library:

function generateEmail(emailType, params, callback){
fs.readFile(__parentDir + '/emailTemplates/' + emailType + '.jade', 'utf8', function (err, data) {
    var fn = jade.compile(data);
    var body = fn({data: params, moment: moment});    //The data going in to the template
    callback(body);
});

}

它在我的Mac上本地工作正常，但是从Azure部署收到时，呈现的电子邮件模板显示为< undefined></undefined> .恐怕Azure上有些时髦，我无法使用'fs'加载文件，而可能不得不使用Blob.

It works fine locally on my Mac, but the rendered email templates show up as <undefined></undefined> when received from the Azure deployment. I'm afraid there's something funky on Azure where I can't use 'fs' to load files and might have to use Blobs instead.

这是Azure中的限制吗?还是该问题与该fs.ReadFile方法无关?

Is this a limitation in Azure? Or could the problem be unrelated to this fs.ReadFile method?

作为健全性检查，我将此部署到Nodejitsu上，并且运行良好.

As a sanity check, I deployed this up to Nodejitsu and it works fine.

非常感谢！

推荐答案

这正是我使用azure和Node.JS遇到的问题.在挖掘许多节点变量后，我发现的解决方案是使用__file.

This was exactly the problem I had with azure and Node.JS. The solution I found after digging with many node variables was to use __file.

作为一种快速的测试方法，您可以将类似于:

As a quick way to test this you can add to your app.js something like :

// global
baseDir = __dirname;

然后，您将可以从任何地方访问此全局变量.即在路由器文件夹内.

Then you would have this global variable accessible from anywhere. ie inside the router folder.

var defaultFile = path.join(baseDir, 'sample.txt');

__dirname 始终返回目录名称当前文件.如果您在根文件夹中的文件中使用此值定义变量，则将具有应用程序基本文件夹.我已经实现了该功能，并且在azure和heroku中可以正常工作.

__dirname always return the directory name for the current file. If you define a variable with this value from a file in the root folder you will have the application base folder.I have implemented this and it's working i azure and heroku.

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