Buffer audio stream server for multiple connections

I have task to build stable audio stream server with internet radio stream, but have some problem. So i have stream from ice cast "server"(actually its a client/PC of some man) with low internet connection speed, and when few clients connect to this stream, internet channel drops them. What i want to do: i wanna make server side app which get this stream and make buffer for multiple clients connections. Simple schema of solutions: Server(ice cast)=> ----512kb-1mb(internet speed)---=>---Buffer Server (up to 100mb internet speed)---<= [Client1, Client2, Client3,...Client*n]. First solution, how i can see: get VPS server which will be get audio stream and up buffered stream with this data but with stable and fast internet connection(buffered ice cast) Second solution essence of question: write buffered operations with hosting service on PHP, Java, Python, Node.js, Ruby. Actually, is it possible write such kind of service with help of this languages? Can i do this one,for example, on heroku.com cloud? Is some one can help me choose correct solution for this task?