php readfile八位字节流的Javascript处理 [英] Javascript handling of php readfile octet stream

问题描述

好的，我已经仔细阅读了相关问题"部分，但没有找到这个答案.

OK, I've had a good read through the "Related Questions" section and I haven't found this answer.

我正在使用ajax请求来强制进行php下载.在PHP端一切正常.假设我有一个名为 DATA 的数据流.现在，我想弹出一个另存为..."对话框.

I'm using an ajax request to force a php download. Things are working fine on the PHP end. Let's say I've got a stream of data called DATA. Now, I want to pop up a "Save as..." dialog.

浏览器已收到一串十六进制值.现在，如何在客户端(javascript)端使用此 DATA ?

The browser has received a string of hex values. Now, what do I do with this DATA on the client (javascript) side?

根据上面的链接，这是我正在使用的PHP代码:

This is the PHP code that I'm using, per the link above:

header('Content-type: application/octet-stream');
header('Content-Disposition: attachment; filename=$file');
readfile($file);

我尝试过

• window.open( DATA )->(当然)不存在十六进制流
• 提交一个动作为 DATA ->相同问题的表单

• window.open(DATA) -> hex stream doesn't exist (of course)
• submitting a form with the action as DATA -> same problem

顺便说一句，如果我从PHP中回显文件，然后使用window.open，它有时会起作用.但不适用于txt文件或jpg等.

BTW, If I echo the file from PHP then use window.open, it works sometimes. But not for txt files or jpgs etc.

我在其他网站上看到了此功能-他们是如何做到的?预先感谢.

I've seen this working on other sites - how are they doing it? Thanks in advance.

推荐答案

以下是我正在寻找的答案:

Here's the answer I was looking for:

window.open("downloadPage.php");

...每次都会弹出一个框.Ajax请求的问题在于返回的文件流被解释为 XMLHttpRequestObj.reponseText .

...which pops up a box every time. The problem with the ajax request was that the returned file stream was interpreted as XMLHttpRequestObj.reponseText.

浏览器显然对此有不同的解释，并且不允许下载.

The browser apparently interprets this differently and doesn't allow the download.

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