使用 POST 数据通过 jQuery AJAX 下载 PHP 文件

2021-12-21 00:00:00 download iframe jquery php ajax

所以我知道有很多类似的帖子，但我认为这足以证明自己的问题:

So I know there have been a number of similar posts, but I think this is enough of a variation to warrant its own question:

我正在用 PHP 和 jQuery 构建一个 XLS 导出器.我正在尝试使用 jQuery POST 一个数组(我认为它作为 GET 查询字符串会太长)，并使用它在我的服务器上生成一个 XLS 文件，然后用户可以下载该文件.

I am building an XLS exporter in PHP and jQuery. I am trying to POST an array with jQuery (which I believe is going to be too long as a GET querystring), and use it to generate an XLS file on my server, which the user can then download.

我过去曾使用隐藏的 iframe 来完成此操作，但由于它们只是重定向到一个 url，这需要我使用 GET，这让我很紧张.

I have used hidden iframes in the past to accomplish this, but since they just redirect to a url, this requires me to use GET, which makes me nervous.

我的问题是:如果这些文件是由多个用户动态生成的，我该如何将这些文件存储在我的服务器上并链接到它们?隐藏的 iframe 会链接到一个单独的 PHP 脚本，该脚本根据会话 ID 或类似的东西定位他们的文件吗?

My question is then: how do I store those files on my server and link to them if they're being generated dynamically, potentially by multiple users? Would a hidden iframe link to a separate PHP script that locates THEIR file based on a session ID or something like that?

在此先感谢您对我肯定会一直被问到的问题的任何指导:)

Thanks in advance for any guidance here on what I'm sure gets asked all the time :)

推荐答案

可以 POST 到隐藏的 iframe.因此，您无需担心查询字符串的长度；您将发布键/值对，这将生成您的 XLS 文件，然后强制将文件下载到浏览器.

It is possible to POST to a hidden iframe. Therefore, you don't need to worry about the length of the query string; you will post the key/value pairs which will generate your XLS file and subsequently force the file download to the browser.

<form method="post" action="/download/xls" target="download_xls"> 
  <fieldset>
    <label>Key 1:</label>
    <input type="text" name="key_1" />
  </fieldset>

  <fieldset>
    <label>Key 2:</label>
    <input type="text" name="key_2" />
  </fieldset>

    <fieldset>
            <input type="submit" value="Submit" /> 
    </fieldset> 
</form>

<iframe id="download_xls" name="download_xls" width="0" height="0" scrolling="no" frameborder="0"></iframe>

更新快速谷歌搜索出现了这篇文章:http://particletree.com/notebook/ajax-file-download-or-not/

UPDATE A quick Google search turned up this article: http://particletree.com/notebook/ajax-file-download-or-not/

基本上，建议是将您的表单发布到当前页面并通过文件下载进行响应.这种替代方案可能对您来说已经足够了.

Basically, the suggestion is to POST your form to the current page and respond with a file download. This alternative might be good enough for you.

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