send a binary json message to a udp server in go

main.go
type Message struct {
   Name string
   Age  int
   // add more fields as needed
}
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main.go
import (
   "encoding/json"
   "encoding/binary"
)

func serializeMessage(msg *Message) ([]byte, error) {
   // convert struct to JSON
   jsonMsg, err := json.Marshal(msg)
   if err != nil {
      return nil, err
   }

   // get the length of the JSON message
   msgLen := uint32(len(jsonMsg))

   // create a buffer for the binary message
   binMsg := make([]byte, 4+msgLen)

   // encode the message length as a uint32 in network byte order
   binary.BigEndian.PutUint32(binMsg, msgLen)

   // copy the JSON message after the message length
   copy(binMsg[4:], jsonMsg)

   return binMsg, nil
}
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main.go
import (
   "net"
)

func sendMessage(msg *Message, serverAddr string) error {
   // serialize the message
   binMsg, err := serializeMessage(msg)
   if err != nil {
      return err
   }

   // open a UDP connection to the server
   addr, err := net.ResolveUDPAddr("udp", serverAddr)
   if err != nil {
      return err
   }
   conn, err := net.DialUDP("udp", nil, addr)
   if err != nil {
      return err
   }
   defer conn.Close()

   // send the binary message
   _, err = conn.Write(binMsg)
   if err != nil {
      return err
   }

   return nil
}
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