My solution is as follows (only for the client):
Add the disabled attribute to the button after the user clicks the submit button
$("input:submit").each(function() {
var srcclick = $(this).attr("onclick");
if (typeof(srcclick)=="function"){
$(this).click(function() {
if (srcclick()) {
setdisabled(this);
return true;
}
return false;
});}
});
function setdisabled(obj) {
setTimeout(function() { obj.disabled = true; }, 100 );
}
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