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package websocket
import (
"net/http"
"github.com/ethereum/go-ethereum/ethlog"
ws "code.google.com/p/go.net/websocket"
)
var logger = ethlog.NewLogger("WS")
// Chat server.
type Server struct {
httpServ string
pattern string
messages []*Message
clients map[int]*Client
addCh chan *Client
delCh chan *Client
sendAllCh chan string
doneCh chan bool
errCh chan error
msgFunc MsgFunc
}
// Create new chat server.
func NewServer(pattern, httpServ string) *Server {
clients := make(map[int]*Client)
addCh := make(chan *Client)
delCh := make(chan *Client)
sendAllCh := make(chan string)
doneCh := make(chan bool)
errCh := make(chan error)
return &Server{
httpServ,
pattern,
nil,
clients,
addCh,
delCh,
sendAllCh,
doneCh,
errCh,
nil,
}
}
func (s *Server) Add(c *Client) {
s.addCh <- c
}
func (s *Server) Del(c *Client) {
s.delCh <- c
}
func (s *Server) SendAll(msg string) {
s.sendAllCh <- msg
}
func (s *Server) Done() {
s.doneCh <- true
}
func (s *Server) Err(err error) {
s.errCh <- err
}
func (s *Server) servHTTP() {
logger.Debugln("Serving http", s.httpServ)
err := http.ListenAndServe(s.httpServ, nil)
logger.Warnln(err)
}
func (s *Server) MessageFunc(f MsgFunc) {
s.msgFunc = f
}
// Listen and serve.
// It serves client connection and broadcast request.
func (s *Server) Listen() {
logger.Debugln("Listening server...")
// ws handler
onConnected := func(ws *ws.Conn) {
defer func() {
err := ws.Close()
if err != nil {
s.errCh <- err
}
}()
client := NewClient(ws, s)
client.onMessage = s.msgFunc
s.Add(client)
client.Listen()
}
// Disable Origin check. Request don't need to come necessarily from origin.
http.HandleFunc(s.pattern, func(w http.ResponseWriter, req *http.Request) {
s := ws.Server{Handler: ws.Handler(onConnected)}
s.ServeHTTP(w, req)
})
logger.Debugln("Created handler")
go s.servHTTP()
for {
select {
// Add new a client
case c := <-s.addCh:
s.clients[c.id] = c
// del a client
case c := <-s.delCh:
delete(s.clients, c.id)
case err := <-s.errCh:
logger.Debugln("Error:", err.Error())
case <-s.doneCh:
return
}
}
}
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