/
room.go
116 lines (102 loc) · 2.51 KB
/
room.go
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// room
package main
import (
"log"
"net/http"
ws "github.com/VeselovAlex/GolangWSChat/Godeps/_workspace/src/github.com/gorilla/websocket"
)
const (
SocketBufferSize = 1024 //bytes
MsgBufferSize = 8 // Message pointers
UserBufferSize = 4 // Client pointers
)
type Room struct {
Send chan *Message
Join chan *Client
Leave chan *Client
Users map[*Client]bool
}
func NewRoom() *Room {
r := new(Room)
r.Send = make(chan *Message, MsgBufferSize)
r.Join = make(chan *Client, UserBufferSize)
r.Leave = make(chan *Client, UserBufferSize)
r.Users = make(map[*Client]bool)
return r
}
func (r *Room) Run() {
for {
select {
case client := <-r.Leave:
log.Println("User", client.Name, "left the channel")
delete(r.Users, client)
close(client.Msg)
case client := <-r.Join:
log.Println("User", client.Name, "joined the channel")
r.Users[client] = true
case msg := <-r.Send:
//Send to each client
for c := range r.Users {
select {
case c.Msg <- msg: //Client is able to receive
// Sent
default:
log.Println("User", c.Name, "left the channel while sending message")
// Bad client, close
delete(r.Users, c)
close(c.Msg)
}
}
}
}
}
var upgrader = &ws.Upgrader{
ReadBufferSize: SocketBufferSize,
WriteBufferSize: SocketBufferSize,
}
//Implement http.Handler
func (room *Room) ServeHTTP(w http.ResponseWriter, r *http.Request) {
log.Println("New room connection established")
/*Switch to WebSocket protocol*/
socket, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.Println("Error serving Room:", err)
return
}
name := getName(w, r)
if len(name) == 0 {
log.Println("Error serving Room:", "bad user data")
errMsg := ws.FormatCloseMessage(ws.CloseUnsupportedData,
"Can not recognise user data")
socket.WriteMessage(ws.CloseMessage, errMsg)
socket.Close()
return
}
client := &Client{
Conn: socket,
Msg: make(chan *Message, MsgBufferSize),
Room: room,
Name: name,
}
room.Join <- client
// Leave after
defer func() { room.Leave <- client }()
go client.Write()
client.Read()
}
func getName(w http.ResponseWriter, r *http.Request) string {
cookie, err := r.Cookie("login")
if err != nil { /*No cookie*/
log.Println("Error reading user nick:", err)
return ""
}
name, ok := nicknames[cookie.Value]
if !ok { /*Bad cookie*/
// Probably useless, delete later
http.SetCookie(w, &http.Cookie{Name: "login", Value: "", MaxAge: -1})
//
log.Println("Error reading user nick:", "bad cookie")
return ""
}
return name
}