i got an error message 411 length required

411 length required 

Normally what these kind of pre-defined issues 411 http error , now html5 ,jquery, js,ajax etc. deal with these kind of issues predetermindly as before sending requests to server as for example when user fulfills his “username” then if length is less, it would indicate error message or balloon to user that “username” this procedure is done before sending request to server.

In short,this error comes when the server refuses to accept the request when user does not fulfill the defined length of content in the input field.