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POForm Submission vs AJAX Polling Call
 

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  1. POForm Submission vs AJAX Polling Call
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    <p>Following up on my question from the other day, I've run into another thing that now I've spent too many hours banging my head against.</p> <p>Mostly, I'm having trouble getting the SUCCESS form to submit. I tried this as well:</p> <p><a href="https://stackoverflow.com/questions/3638750/jquery-form-submit">jQuery form submit</a></p> <p>Here's the code in a semi-functional fiddle:</p> <p><a href="http://jsfiddle.net/ZcgqV/" rel="nofollow noreferrer">http://jsfiddle.net/ZcgqV/</a></p> <p>Essentially what happens is this:</p> <ol> <li>I bind a method to the form's submission via onSubmit (rather than click)</li> <li>On submit, it calls a remote server via jQuery .ajax() call</li> <li>If the response is "PENDING", retry every 1s, nine times</li> <li>On failure, don't submit the form</li> <li>On success, submit the form</li> </ol> <p>No matter what I try, I can't get the form to either submit when I want it to without going into a loop, or not submit immediately while it tries the remote server.</p> <p>~Frustrated-trying-100-things-that-fail-ly yours...</p> <p><em>Here's the code directly in case you dislike fiddles:</em></p> <pre><code>var retries = 0; var success = false; var token = "toki wartooth is not a bumblebee"; $(document).ready(function() { // Attach the action to the form $('#tehForm').attr('onSubmit', 'onsubmit_action(event)'); }); function async(fn) { setTimeout(fn, 1000); } function pollServer() { $.ajax({ type: "POST", cache: "false", url: "/remoteCall", dataType: "json", data: { ref_token: token } }).done(function(data, code, jqXHR) { switch (data.status) { case "SUCCESS": alert("Success"); success = true; // --&gt; HERE IS WHERE I WANT THE FORM TO SUBMIT &lt;-- break; case "PENDING": if (retries &lt; 9) { retries += 1; async(function() { pollServer(); }); } else { alert("Failed after 9 tries"); } break; case "ERROR": alert("Error"); break; default: alert("Some kind of horrible error occurred"); break; } }).fail(function(jqXHR, textStatus) { var statusCode = jqXHR.status; alert("Request failed: " + statusCode + " " + textStatus); }); } function onsubmit_action(event) { pollServer(); if (success === false) { // RETURN FALSE DIDN'T WORK, SO I FOUND THIS event.preventDefault(); } }​ </code></pre> <p>EDIT:</p> <p>Again, the real problem here is that I stop submission of the form. On SUCCESS, I want the form to submit. Currently if I use .submit() in SUCCESS, the AJAX is called again, starting the process over. What I want is the ACTION of the FORM to fire on SUCCESS only.</p>
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    1. CONOTE: I know this is a seemingly common question, but I have yet to come across an answer that is working for me, which is why I'm asking. Believe, me I've been reading/trying.
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    2. COI don't really understand what your code is trying to do, from what I can gather try set ajax context: $('#tehForm'); then you can use $(this) // == context so $(this).submit()
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    3. COIs there a need to poll the server every 1s? If not, but you want fast polling, I'd recommend calling a function to do another ajax call in the done handler when you match the PENDING case. The reason I ask is every 1s is REALLY frequently, and you're bound to get crazy behavior from it. Binding it to the done handler will guarantee you fire calls as fast as the browser can process one (and having the max 4 ajax calls the browser can handle running simultaneously doesn't seem useful in most cases).
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