double-submit-prevention

To clarify what double submit is: When the user clicks on a submit button twice, the server will process the same POST data twice. To avoid this (apart from disabling the button after a single submit), most web frameworks like Struts provide a token mechanism. I am searching for the equivalent of this in GWT. If you want to avoid submitting twice, how about: boolean processing = false; button.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { if (!processing) { processing = true; button.setEnabled(false); // makes an RPC call, does something you only want to

Exact Duplicate : How to handle multiple submissions server-side The general task at hand: preventing a double form submission in a multi-user web based application. Think financial transactions. I have two methods which can be used in tandem: JavaScript disabling of button Disadvantage: does not work if JavaScript is disabled Back-end verfication - see how long ago the last request of this type came from this user and issue error if not too long ago Disadvantage: If the two submissions are close enough together, each may not be able to be aware of the other I am looking for subject matter

Like every other web developer on the planet, I have an issue with users double clicking the submit button on my forms. My understanding is that the conventional way to handle this issue, is to disable the button immediately after the first click, however when I do this, it doesn't post . I did do some research on this, god knows there's enough information, but other questions like Disable button on form submission , disabling the button appears to work. The original poster of Disable button after submit appears to have had the same problem as me, but there is no mention on how/if he resolved

I need to avoid the double click submitting behavior. I'm using the client validation with the unobtrusive library. I have the following code for avoiding the double clic: jQuery.fn.preventDoubleSubmit = function () { var alreadySubmitted = false; return jQuery(this).submit(function () { if (alreadySubmitted) return false; else { alreadySubmitted = true; } }); }; jQuery('form').preventDoubleSubmit(); Unfortunately, if my form has some validable fields (for example, a required field), the code above is still being fired, hence, even if I correct any mistakes on the form, I won't be able to

How can I prevent the user from double clicking submit button on my signup form which is an ajax partial view? I regret to ask since this would have already been asked. I just can't find a clear working answer now matter where I search. Disabling the button prevent submit. Using a var javascript clickcount+alert+return_false does not reset. Environment: asp.net mvc3 View: Form displays onload: @RenderPage("_SignupForm.cshtml") Submission using: @using (Ajax.BeginForm("Index", "Signup", null, new AjaxOptions { UpdateTargetId = "signupForm", InsertionMode = InsertionMode.Replace, HttpMethod =

I have an Intranet ASP.NET application which is sometimes slow to respond. My requirement is to prevent double submit, and ideally provide feedback to the user that the form has already been submitted. Examples I've found show how to disable a submit button, but that's not enough, as in my app the submit can happen: From a submit button. From any control with AutoPostBack = true (which submits using javascript AFAIK). From either of the above within an UpdatePanel - in which case as I understand it, the POST is done using AJAX, and I would need to re-enable when the AJAX call is complete. I'm