hagope hagope - 4 months ago 103
Node.js Question

Convert a directory structure in the filesystem to JSON with Node.js

I have a file structure like this:

root
|_ fruits
|___ apple
|______images
|________ apple001.jpg
|________ apple002.jpg
|_ animals
|___ cat
|______images
|________ cat001.jpg
|________ cat002.jpg


I would like to, using Javascript and Node.js, listen to this root directory and all sub directories and create a JSON which mirrors this directory structure, each node contains type, name, path, and children:

data = [
{
type: "folder",
name: "animals",
path: "/animals",
children: [
{
type: "folder",
name: "cat",
path: "/animals/cat",
children: [
{
type: "folder",
name: "images",
path: "/animals/cat/images",
children: [
{
type: "file",
name: "cat001.jpg",
path: "/animals/cat/images/cat001.jpg"
}, {
type: "file",
name: "cat001.jpg",
path: "/animals/cat/images/cat002.jpg"
}
]
}
]
}
]
}
];


Here's a coffeescript JSON:

data =
[
type: "folder"
name: "animals"
path: "/animals"
children :
[
type: "folder"
name: "cat"
path: "/animals/cat"
children:
[
type: "folder"
name: "images"
path: "/animals/cat/images"
children:
[
type: "file"
name: "cat001.jpg"
path: "/animals/cat/images/cat001.jpg"
,
type: "file"
name: "cat001.jpg"
path: "/animals/cat/images/cat002.jpg"
]
]
]
]


how to get this json data format in django views?(python)

Answer

Here's a sketch. Error handling is left as an exercise for the reader.

var fs = require('fs'),
    path = require('path')

function dirTree(filename) {
    var stats = fs.lstatSync(filename),
        info = {
            path: filename,
            name: path.basename(filename)
        };

    if (stats.isDirectory()) {
        info.type = "folder";
        info.children = fs.readdirSync(filename).map(function(child) {
            return dirTree(filename + '/' + child);
        });
    } else {
        // Assuming it's a file. In real life it could be a symlink or
        // something else!
        info.type = "file";
    }

    return info;
}

if (module.parent == undefined) {
    // node dirTree.js ~/foo/bar
    var util = require('util');
    console.log(util.inspect(dirTree(process.argv[2]), false, null));
}