server/spectator.go

package main

import (
	"code.google.com/p/go.net/websocket"
	"encoding/json"
	"log"
)

type Spectator struct {
	ws   *websocket.Conn
	send chan Message
	Id   string
}

func (s *Spectator) sender() {
	log.Printf("%s: sender launched", s.Id)
	for things := range s.send {
		b, err := json.Marshal(things)
		if err != nil {
			break
		}
		// XXX: send the count to our bandwidth analyzer ...
		_, err = s.ws.Write(b)
		if err != nil {
			break
		}
	}
	s.ws.Close()
	log.Printf("%s: spectator sender close", s.Id)
}

func (s *Spectator) recv() {
	var msg interface{}
	buff := make([]byte, maxMessageSize)
	for {
		n, err := s.ws.Read(buff)
		if err != nil {
			log.Printf("%s: problem reading from player: %s", s.Id, err)
			break
		}
		// XXX: send n to our bandwidth analyzer ...
		log.Println(string(buff[:n]))
		if n == len(buff) {
			log.Printf("%s: read buffer overfull: %s", s.Id, string(buff))
			break
		}
		err = json.Unmarshal(buff[:n], &msg)
		log.Println(n)
		if err != nil {
			log.Printf("%s: problem reading from player: %s", s.Id, err)
			break
		}
		// After the first bit of handshaking, the rest of the messages should
		// only be "{}" for spectators, and the following could hold true:
		//
		// if string(buff[:n]) != "{}" {
		// 	log.Printf("protocol breach!!")
		// 	break
		// }
	}
	log.Printf("%s: recv close", s.Id)
	s.ws.Close()
}