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POHandle file download from ajax post
 

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    <p>I have a javascript app that sends ajax POST requests to a certain URL. Response might be a JSON string or it might be a file (as an attachment). I can easily detect Content-Type and Content-Disposition in my ajax call, but once I detect that the response contains a file, how do I offer the client to download it? I've read a number of similar threads here but none of them provide the answer I'm looking for. </p> <p>Please, please, please do not post answers suggesting that I shouldn't use ajax for this or that I should redirect the browser, because none of this is an option. Using a plain HTML form is also not an option. What I do need is to show a download dialog to the client. Can this be done and how?</p> <p>EDIT:</p> <p>Apparently, this cannot be done, but there is a simple workaround, as suggested by the accepted answer. For anyone who comes across this issue in the future, here's how I solved it:</p> <pre><code>$.ajax({ type: "POST", url: url, data: params, success: function(response, status, request) { var disp = request.getResponseHeader('Content-Disposition'); if (disp &amp;&amp; disp.search('attachment') != -1) { var form = $('&lt;form method="POST" action="' + url + '"&gt;'); $.each(params, function(k, v) { form.append($('&lt;input type="hidden" name="' + k + '" value="' + v + '"&gt;')); }); $('body').append(form); form.submit(); } } }); </code></pre> <p>So basically, just generate a HTML form with the same params that were used in AJAX request and submit it. </p>
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    1. CONo, it can't be done. I struggled with the same thing myself for a long time. I eventually resulted to a form post. If people are all saying the same thing, it's probably true
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      1. USDavid L
    2. COYou can't download from an ajax call. Why not pass back the URL to the file and redirect from there. If it's a direct file download link, it won't even navigate away from your current page.
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    3. COSend your form post to a hidden iframe `<form target="myiframe" method="POST">...</form>`. It will look like ajax to the user, and will result in a normal file download dialog.
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      1. USKevin B
 

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