java - What is best practice to prevent double form submit -


recently working on project using ajax call java servlet, , request takes more 10 sec response, need make sure during time user won't able submit form again, , current approach detect submit button click event , disable submit button, once success or error function triggered in ajax, enable button again, not approach.

---- edit ---- sorry, wasn't explain clearly, mean can stop non technical background user, if 1 intend attack site or whatever reason, can modify html code enable button, , submit,

before tried way set cookie interval after form submit, , check cookie when request finish, wondering whether there other way this, question purely learning purpose.

sorry english:)

i dont see wrong disabling button, use, because not provides indication system acknowledged click prevent user clicking again.

if reason dont can disable underlying method call this:

var issubmitting = false;  function handleclick(){     if (!issubmitting)     {         issubmitting = true;         $.ajax(             "http://yourservice/submit" {                 data: {somedata:123},                 contenttype: 'application/json',                 type: 'post',                 success: function(){                     issubmitting = false;                 },              });      } }

about edit, cookie sounds approach, need server going pass client, , check on submit. once has been authorized server prevent processing of further requests same parameter.

but bear in mind malicious user spawn thousands of requests cookies , perform submissions anyway, not defence against attackers, have implement form of throttling.

so in end if want prevent accidental submissions button hide suffice.


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