package main
import (
    "bytes"
    "gob"
    "rpc"
    "http"
    "io/ioutil"
    "net"
    "fmt"
    "os"
    )
type Test int

func EncodeToBinary(value interface{}) []byte {
    buf := bytes.NewBuffer(make([]byte,0))
    encoder := gob.NewEncoder(buf)
    encoder.Encode(value)
    return buf.Bytes()
}

func DecodeFromBinary(buffer []byte, value interface{}) os.Error {
    //fmt.Println("decodeFromBinary: ", buffer, value)
    buf := bytes.NewBuffer(buffer)
    decoder := gob.NewDecoder(buf)
    return decoder.Decode(value)
}

func (t *Test) RPC(args *int, reply *int) os.Error {
    *reply = 0
    return nil
}

func main() {
    t := new(Test)
    b, err := ioutil.ReadFile("test.txt")
    if err == nil {
        var a map[int]int
        DecodeFromBinary(b, &a)
        fmt.Println(EncodeToBinary(a))
        return
    }
    rpc.Register(t)
    rpc.HandleHTTP()
    l, _ := net.Listen("tcp", ":1234")
    go http.Serve(l, nil)
    client, _ := rpc.DialHTTP("tcp",  "127.0.0.1:1234")
    i := 0
    a := make(map[int]int)
    client.Call("Test.RPC", &i, &i)
    b = EncodeToBinary(a)
    fmt.Println(b)
    ioutil.WriteFile("test.txt", b, 0666)
}