[Koha-devel] Disabling multiple submission on search form
SUZUKI Arthur
arthur.suzuki at univ-lyon3.fr
Thu Feb 18 11:20:12 CET 2016
Hi Frederic,
We are not sure but all those requests from same IP with same query in such a few seconds gives us some confidence in this scenario.
I just opened a bug ticket: https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=15855
Attached to it is an extract of koha-opac-access_log for better understanding of the issue.
Also tested your code, works great on Chrome, IE11 and Firefox!
Regards,
Arthur
-----Message d'origine-----
De : frederic.demians at gmail.com [mailto:frederic.demians at gmail.com] De la part de Frédéric Demians
Envoyé : jeudi 18 février 2016 09:14
À : SUZUKI Arthur
Cc : koha-devel at lists.koha-community.org; koha-devel at nongnu.org; CROUZET Olivier; BOUIS Sonia
Objet : Re: [Koha-devel] Disabling multiple submission on search form
> Some impatient users tends to click several times on the “Go” button
> of the search form on OPAC. Probably in a desperate hope that this
> will speed up the whole process.
> However the result is quite opposite, as Zebra is then queried
> multiple times which increases the server cpu load, until it reach
> 100% and cause Denial of Service (boooh…)
Are you sure your users are doing that? Koha server can lag severely for other reasons...
> We had the idea of disabling the “searchsubmit” button upon first click.
> This is done by adding onclick=”this.disabled=true;” after “id=searchsubmit”
> in masthead.inc.
Rather than modifying direcly masthead.inc, you could do it with a JavaScript snippet placed in opacuserjs system preference:
$(document).ready(function() {
$('#searchform').submit(function() {
$('#searchsubmit').prop('disabled',true).text('searching...');
});
});
It could make sense to integrate this to Koha code base: open a bug ticket.
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