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POjQuery post request interrupted: Only half of post parameters arrive
 

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  1. POjQuery post request interrupted: Only half of post parameters arrive
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    <p>I have a noticed a strange phenomenon in my LAMP environment.<br> Over the frontend I execute an AJAX post request with jQuery like this:</p> <pre><code>$.post('save.php', {data1: d1, data2: d2, [...], dataN: dN}) </code></pre> <p>The variables <code>d1</code> to <code>dN</code> are collected from the website (e.g. from text inputs, textareas, checkboxes, etc.) with jQuery beforehand.</p> <p>The file <code>save.php</code> takes the post parameters <code>data1</code> to <code>dataN</code> and saves them in the database in one query.</p> <p>The request takes about 500ms and works without problems <em>unless</em> I change pages (e.g. by clicking a link) during the request.</p> <p>Normally, I would expect the request to be aborted and ignored (which would be fine) <em>but</em> (and this is the strange behaviour) the request seems to be completed but only with part of the data transmitted and thus saved.</p> <p>That means for example, that the php script saves only <code>data1</code> to <code>data5</code> and sets <code>data6</code> to <code>dataN</code> to empty.<br> The problem seems to be caused by the AJAX request already (not the php script) since fields <code>$_POST['data6']</code> to <code>$_POST['dataN']</code> are not set in php in this scenario.</p> <p>So my questions:<br> <em>Why does this happen (is this expected behaviour)?</em><br> <em>How can I avoid it?</em></p> <p><strong>Update</strong><br> The problem is neither jQuery nor php solely. jQuery collects the values correctly and tries to post them to php. I just validated it - it works. The php script on the other hand handles everything it gets as expected - it just does not receive the whole request.<br> So the problem must be the interrupted request itself. Unlike I'd expect it does not abort or fail, it still transmits all the data until the cut off.<br> Then php gets this post data and starts handling it - obviously missing some information.</p> <p><strong>Update 2</strong><br> I fixed the problem by adding a parameter <code>eof</code> after <code>dataN</code> and checking if it was set in php. This way I can be sure the whole request was transmitted.<br> Nevertheless this does not fix the source of the problem which I still don't understand.<br> <em>Any help anyone?</em></p>
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    1. CONever seen a jquery post with data1 [...], dataN.. as parameters. Does it make multiple xhr, or only one xhr ?
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    2. COIt's just one xhr and this is how you post several parameters: http://api.jquery.com/jQuery.post/
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    3. COAre you sure of your jQuery syntax of $.post ?
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