func newClient(ws *websocket.Conn, h *hub, srv *wsServer) *wsClient {
if ws == nil {
log.Panicln("ws cannot be nil")
}
if srv == nil {
log.Panicln("server cannot be nil")
}
maxID++
return &wsClient{
id: maxID,
ws: ws,
h: h,
srv: srv,
subs: make(map[string]string),
inMsgChan: make(chan *wsMessage),
outMsgChan: make(chan *wsMessage),
doneChan: make(chan bool),
socketID: sha1Sum(fmt.Sprintf("%s-%s-%d", ws.RemoteAddr().String(),
ws.LocalAddr().String(), maxID)),
}
}
func (g *Group) AddClient(ws *websocket.Conn) *Client {
if len(g.Clients) > g.MaxClients {
return nil
}
g.Lock()
g.CurrentId++
c := new(Client)
c.Id = g.CurrentId
c.Conn = ws
c.Addr = ws.LocalAddr().String()
c.CurGroup = g
g.Clients[c.Id] = c
g.Unlock()
c.On_Login()
return c
}
func (m *Master) Listen(ws *websocket.Conn) {
logger.Printf("Listen(%v): node connecting", ws.LocalAddr().String())
nh := NewNodeHandle(NewConnection(ws, false), m)
logger.Printf("Adding Node to Map (%v)", ws.LocalAddr().String())
m.nodeMu.Lock()
m.NodeHandles[nh.NodeId] = nh
m.nodeMu.Unlock()
logger.Printf("Calling Remove Node on Death (%v)", ws.LocalAddr().String())
go m.RemoveNodeOnDeath(nh)
for i := 0; i < iomonitors; i++ {
logger.Printf("Starting IOMonitor %v (%v)", i, ws.LocalAddr().String())
go nh.MonitorIO()
}
logger.Printf("Starting Monitor (%v)", ws.LocalAddr().String())
nh.Monitor()
}
func (self *Handler) WSSocketHandler(ws *websocket.Conn) {
sock := &WWS{
Socket: ws,
Logger: self.logger,
Born: time.Now(),
Quit: false}
defer func(logger *util.HekaLogger) {
if r := recover(); r != nil {
debug.PrintStack()
if logger != nil {
logger.Error(self.logCat, "Uknown Error",
util.Fields{"error": r.(error).Error()})
} else {
log.Printf("Socket Unknown Error: %s\n", r.(error).Error())
}
}
}(sock.Logger)
// get the device id from the localAddress:
Url, err := url.Parse(ws.LocalAddr().String())
if err != nil {
self.logger.Error(self.logCat, "Unparsable URL for websocket",
util.Fields{"error": err.Error()})
return
}
elements := strings.Split(Url.Path, "/")
var deviceId string
if len(elements) < 3 {
self.logger.Error(self.logCat, "No deviceID found",
util.Fields{"error": err.Error(),
"path": Url.Path})
return
}
deviceId = elements[3]
// Kill the old client.
if client, ok := Clients[deviceId]; ok {
client.Quit = true
}
self.metrics.Increment("Socket")
Clients[deviceId] = sock
sock.Run()
self.metrics.Decrement("Socket")
}
/* pings the server with a message; closes socket */
func ping(sock *websocket.Conn) {
fmt.Println("user connected on page <" + sock.LocalAddr().String() +
".html> from <" + sock.Request().RemoteAddr + ">")
/* array of bytes for a buffer */
buf := make([]byte, 1024)
/* read, error check */
r, err := sock.Read(buf)
if err != nil {
panic("Read: " + err.Error())
}
/* print size and what was read */
fmt.Println("Read", r, "bytes")
fmt.Println(string(buf))
_, err = sock.Write([]byte("OK"))
if err != nil {
panic("Read: " + err.Error())
}
sock.Close()
}
func wsHandler(ws *websocket.Conn) {
url := strings.Split(fmt.Sprintf("%s", ws.LocalAddr()), "/")
id := url[len(url)-1]
peer := plong.FindPrivatePeer(id)
if peer.PrivateId == "" {
fmt.Printf("[WebSocket] Error: No such peer “%s”.\n", id)
return
}
c := &Connection{send: make(chan string, BufferSize), ws: ws, peer: peer}
wsHub.Add(c)
fmt.Printf("[WebSocket] New connection: “%s”.\n", id)
defer func() {
wsHub.Remove(c)
}()
go c.Writer()
c.Reader()
}
func parseCommand(sock *websocket.Conn) {
fmt.Println("user connected on page <" + sock.LocalAddr().String() +
"> from <" + sock.Request().RemoteAddr + ">")
reader := bufio.NewReader(sock)
writer := bufio.NewWriter(sock)
/* varaibles for username and logged_in status */
var username string
var logged_in = false
/* loop until login */
for !logged_in {
/* block until a line is read */
line, err := reader.ReadString('\n')
/* if socket closed return from thread */
if closed_sock(err) {
break
}
/* trim off the command then trim out the spaces, username is left */
if !strings.HasPrefix(line, "ME IS") {
writeToBuf("ERROR invalid: must login first\n", writer)
continue
}
line = strings.TrimPrefix(line, "ME IS")
username = strings.TrimSpace(line)
/* username must not contain spaces
* username must not be in use
* login user if valid */
if strings.Contains(username, " ") {
writeToBuf("ERROR username cannot contain spaces\n", writer)
} else if _, exists := users[username]; exists {
writeToBuf("ERROR username in use already\n", writer)
} else {
users[username] = writer
logged_in = true
writeToBuf("OK user logged in\n", writer)
}
/* loop back again */
}
/* loop until disconnect/logout */
for logged_in {
/* read the next line */
line, err := reader.ReadString('\n')
if closed_sock(err) {
break
}
/* parse through options;
trim prefix, get username, process command */
/* list all users connected */
if strings.HasPrefix(line, "WHO HERE") {
line = strings.TrimPrefix(line, "WHO HERE")
in_name := strings.TrimSpace(line)
if in_name != username {
writeToBuf("ERROR name with command mismatch\n", writer)
continue
}
/* add all users to the bufferWriter then flush to send */
for name, _ := range users {
writer.WriteString(name + " ")
}
writer.Flush()
/* send to all users */
} else if strings.HasPrefix(line, "BROADCAST") {
line = strings.TrimPrefix(line, "BROADCAST")
in_name := strings.TrimSpace(line)
if in_name != username {
writeToBuf("ERROR name with command mismatch\n", writer)
continue
}
/* get size of bytes */
line, err = reader.ReadString('\n')
if closed_sock(err) {
break
}
size, err := strconv.Atoi(strings.TrimSpace(line))
if size == 0 || err != nil {
writeToBuf("ERROR invalid message size\n", writer)
continue
}
buf := make([]byte, size)
for i := 0; i < size; i++ {
buf[i], err = reader.ReadByte()
if err != nil {
panic("ReadByte(broadcast)" + err.Error())
}
}
/* write to all users */
for _, b_out := range users {
writeToBuf("FROM "+username+"\n"+line+string(buf), b_out)
}
/* logout user */
} else if strings.HasPrefix(line, "LOGOUT") {
line = strings.TrimPrefix(line, "LOGOUT")
in_name := strings.TrimSpace(line)
if in_name != username {
writeToBuf("ERROR invalid logout request\n", writer)
continue
}
/* remove from map and close socket */
delete(users, username)
writeToBuf("OK user logged out\n", writer)
logged_in = false
/* cant log in again */
} else if strings.HasPrefix(line, "ME IS") {
writeToBuf("ERROR already logged in on this connection\n", writer)
/* not a valid command */
} else {
writeToBuf("ERROR invalid command\n", writer)
}
/* re loop for next read */
}
sock.Close()
fmt.Println("Closed socket " + sock.Request().RemoteAddr)
}
/* echo it back */
func Echo(sock *websocket.Conn) {
fmt.Println("echo conn on page <" + sock.LocalAddr().String() +
".html> from <" + sock.Request().RemoteAddr + ">")
io.Copy(sock, sock)
}
