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Editorial Team
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Asked: 2026-06-10T16:37:23+00:00

I’m looking for a way to POST data to a backend script, use it

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I’m looking for a way to POST data to a backend script, use it to generate a temporary file on the fly (temporary in that it’s dynamically generated and not saved to disk on the server), and then offer it to the client as a download.

I have the backend script functioning fine. The problem is that I haven’t yet found a way to get the download prompt via an AJAX call.

If I weren’t POSTing data, I would just use something like:

window.location.href = 'path/to/my/script.php';

Is what I’m after even possible? Can it be done without resorting to “hacks” like dynamically injecting a form into the DOM and submitting it, or opening up another browser window, etc.?

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1 Answer

  1. Editorial Team
    1. make POST request;
    2. create the resource;
    3. answer with the resource path;
    4. window.location.href = resourcePath.
    5. [optional] want to secure such resource from third part download? Attach a CSRF token, and make the resource available only if CSRF check is passed – otherwise congratulations, you just won a 403 puppy!

    If the resource has proper headers, the browser will ask you to save / open it with specific app. / an so.

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