如何用node webkit js写文件? [英] how to write file with node webkit js?

问题描述

构建应用程序时，"fs"模块不起作用.因此，它必须写入文件，但是当我启动我的应用程序时，什么也没有发生.但是，如果我使用以下方式启动我的应用程序:

$ /path/to/app nw

它正常工作.怎么了?

某些代码，我在其中使用fs:

function check_prob_2(){
    console.log('Problem 2');
    fs.appendFile('log.txt', 'Checking problem 2: \n\n');
    ...
    }

我使用了该功能，但是不起作用.它仅在构建应用程序后才起作用.我使用本指南 >

解决方案

尝试一下:

包括以下(标准)模块:

var path = require('path');

指定如下路径:

fs.appendFile(path.resolve(__dirname, './log.txt'), 'Checking problem 2: \n\n');

可以在此处找到有关__dirname全局的更多信息./p>

编辑

由于在node-webkit中未定义__dirname，因此您必须使用以下解决方法:

制作一个文件util.js，或者您想调用它，但包含以下行:

exports.dirname = __dirname;

__ dirname变量现在可以在您的主文件中显示:

var dirname = require('./util.js').dirname;

并在代码中将__dirname替换为dirname.

详细信息此处

When I build my app, 'fs' module doesn't work. So, it must write file, but when I start my app nothing happens. But if I start my app with:

$ /path/to/app nw

It works correctly. What's wrong?

Some code, where I use fs:

function check_prob_2(){
    console.log('Problem 2');
    fs.appendFile('log.txt', 'Checking problem 2: \n\n');
    ...
    }

I use that function, but it doesn't work. It doesn't work only after build application. I build it with this guide

解决方案

Try this:

Include the following (standard) module:

var path = require('path');

Specify the path as follows:

fs.appendFile(path.resolve(__dirname, './log.txt'), 'Checking problem 2: \n\n');

More info on the __dirname global can be found here.

EDIT

Since __dirname is not defined in node-webkit, you'll have to use the following workaround:

Make a file util.js or however you want to call it, containing this line:

exports.dirname = __dirname;

The __dirname variable can now be exposed in your main file:

var dirname = require('./util.js').dirname;

And replace __dirname by dirname in the code.

Details here

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