Re: How to avoid mulitple submission of form in html

Hi,

Create an onclick trigger on your button which includes some javascript like -

    doc1.getElementById("testBut1").disabled=true;
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Should do the trick.

J.C.

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Re^2: How to avoid mulitple submission of form in html by afoken (Chancellor) on Sep 10, 2011 at 06:34 UTC
Create an onclick trigger on your button which includes some javascript [...]] Should do the trick. Nope. Adding Javascript to the client will never solve a server side problem. Simply because Javascript is not always available on the client (LWP, WWW::Mechnanize, NoScript, filtering proxies, ...). And, quite obviously, it can be disabled on the client. In a WWW environment, you must not trust the client. The server has to detect that the form was submitted several times. The usual approach is to give each form a unique ID (e.g. a UUID) in a hidden field or as part of the submit URL; and to make sure that each and every ID is accepted exactly once. Alexander -- Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)	[reply]

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Re^2: How to avoid mulitple submission of form in html
by afoken (Chancellor) on Sep 10, 2011 at 06:34 UTC

Create an onclick trigger on your button which includes some javascript [...]] Should do the trick.

Nope. Adding Javascript to the client will never solve a server side problem. Simply because Javascript is not always available on the client (LWP, WWW::Mechnanize, NoScript, filtering proxies, ...). And, quite obviously, it can be disabled on the client. In a WWW environment, you must not trust the client.

The server has to detect that the form was submitted several times. The usual approach is to give each form a unique ID (e.g. a UUID) in a hidden field or as part of the submit URL; and to make sure that each and every ID is accepted exactly once.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

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