2.3 基于http的rpc

服务端

func main() {
    rpc.RegisterName("HelloService", new(HelloService))
    http.HandleFunc("/jsonrpc", func(w http.ResponseWriter, r *http.Request) {
        var conn io.ReadWriteCloser = struct {
            io.Writer
            io.ReadCloser
        }{
            ReadCloser: r.Body,
            Writer:     w,
        }
        rpc.ServeRequest(jsonrpc.NewServerCodec(conn))
    })
    http.ListenAndServe(":1234", nil)
}