如何使用 AJAX 创建 Json 数据源 .txt 文件？
我正在创建一个收集有关客户的标准信息的表单。当用户点击“保存”时，我想创建一个 .txt 文件，用于稍后检索从客户收集的所有数据。我正在使用 DataTables，它是一个 jQuery 插件来显示数据。 .txt 文件将被格式化为保存如下：
{
"aaData": [
["client 1 name", "address", "city", "state", "zip"],
["client 2 name", "address", "city", "state", "zip"],
["client 3 name", "address", "city", "state", "zip"],
...["client x name", "address", "city", "state", "zip"]
]
}
其中“aaData”：由 DataTables 使用。这将是 iPhone 应用程序的一部分，因此数据源必须非常小，并且不依赖于与服务器的持续连接，因此本质上是客户端数据源。 .txt 文件在编辑和保存时也必须更新，然后在每次下载时进行替换。
I'm creating a form that collects standard information about customers. When the user hits save, I would like to create a .txt file that would be used to later retrieve all of the data collected from customers. I'm using DataTables which is a jQuery plugin to display the data. The .txt file would be formatted to be saved as such:
{
"aaData": [
["client 1 name", "address", "city", "state", "zip"],
["client 2 name", "address", "city", "state", "zip"],
["client 3 name", "address", "city", "state", "zip"],
...["client x name", "address", "city", "state", "zip"]
]
}
Where "aaData": is used by DataTables. This is going to part of an iPhone app, so the data source has to be very small and not reliant on a constant connection to a server, so, essentially, a client-side data source. The .txt file has to also be updated when edited and saved, and then replaced every time it is downloaded.
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您想在本地（即客户端计算机上）保存 .txt 文件吗？这是不可能的：出于（明显的）安全原因，浏览器的 JavaScript 环境无法访问本地文件系统。您可以将此 JSON 格式的数据保存在 cookie 中（每个 cookie 最大 4 KB），或者在 HTML 5 中使用 本地存储。
Do you want to save a .txt file locally (i.e., on the client computer)? That's not possible: for (obvious) security reasons, a browser's JavaScript environment is unable to access the local file system. You can save this JSON-formatted data in a cookie (max. 4 KB per cookie) or, with HTML 5, using localStorage.