On 13/05/2010 08:45, Karthik Nanjangude wrote:
> Hi
> 
> Spec :
> JDK1.5
> TOMCAT 6.0.20
> O/s windows /Linux
> 
> 
> Question  :     My web application uses "href" & "css based image's"   for  
> transferring the request from 1 page to another
>                    The problem is UserVisitor is  clicking the image based 
> href  MULTIPLE TIMES ( multiple clicks )

Why is this a problem?

> <a href="image.jsp?mult=1" id='submitButton1'  
> onClick="this.onclick=function(){return false}" target="_self"
>                    class="buttonRedSmall"><span>Submit Form</span></a></td>

1. Unset the href value, or set it to '#image.jsp?mult=1".  You can
always set a timer, to remove the '#' after a couple of seconds, if the
page hasn't changed.

2. Use a <button></button> instead and disable it during the first mouse
down.

> And causes the multiple form submits.  How to prevent the same ?
> 
> I googled / yahooed for Cross browser based  tricks to disable the multiple 
> request...Not luck so far ...
> 
> Can some body help me if Tomcat has any special features to prevent this 
> attack ....... :(

It doesn't.


p

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