save packet data on browser and resend it if failure occurs [closed]

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I am looking for an algorithm, This is some advance version of leaky bucket algorithm. At the State where data destroys because of traffic, I want to make a change that data could be save on browser or receiver end and after some time interval, it should be sent automatically until it reach to receiver. Of curse it'll increase the traffic more but the reliability will also increase. Please help if anyone can.

Thanks