如何在javascript中编写json文件 [英] how to write json files in javascript

问题描述

好的，所以我正在使用js编写Web操作系统。我正在使用JSON文件系统。我已经在网上寻找关于JSON东西的教程大约一个星期了，但我找不到任何关于从网页编写JSON文件的内容。我需要在文件中创建新对象，而不是更改现有对象。这是我到目前为止的代码：

Ok, so I am programming a web operating system using js. I am using JSON for the file system. I have looking online for tutorials on JSON stuff for about a week now, but I cannot find anything on writing JSON files from a web page. I need to create new objects in the file, not change existing ones. Here is my code so far:

{"/": {
            "Users/": {
                "Guest/": {
                    "bla.txt": {
                        "content": 
                            "This is a test text file"
                    }

                },
                "Admin/": {
                    "html.html": {
                        "content": 
                            "yo"

                    } 
                }
            },
            "bin/": {
                "ls": {
                        "man": "Lists the contents of a directory a files<br/>Usage: ls"
                },
                "cd": {
                    "man": "Changes your directory<br/>Usage: cd <directory>"
                },
                "fun": {
                    "man": "outputs a word an amount of times<br/>Usage: fun <word> <times>"
                },
                "help": {
                    "man": "shows a list of commands<br/>Usage: help"
                },
                "clear": {
                    "man": "Clears the terminal<br/>Usage: clear"
                },
                "cat": {
                    "man": "prints content of a file<br/>Usage: cat <filename>"
                }
            },
            "usr/": {
                "bin/": {

                }, 
                "dev/": {

                }   
            }
        }}

推荐答案

我认为更好的解决方案是对JSON进行字符串化，使用base64编码进行编码，然后将其发送到可以保存此文件的服务器端脚本（例如PHP页面）。请参阅：

I think the better solution is to stringify your JSON, encode with base64 encoding and then send it to a server-side script (a PHP page, for instance) which could save this file. See:

var json = JSON.stringify(myJson);
var encoded = btoa(json);

您可以使用ajax发送：

You can use ajax for sending:

var xhr = new XMLHttpRequest();
xhr.open('POST','myServerPage.php',true);
xhr.setRequestHeader('Content-type','application/x-www-form-urlencoded');
xhr.send('json=' + encoded);

在服务器端：

$decoded = base64_decode($_POST['json'])
$jsonFile = fopen('myJson.json','w+');
fwrite($jsonFile,$decoded);
fclose($jsonFile);

这篇关于如何在javascript中编写json文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！