forked from daptin/daptin
/
websocket_server.go
143 lines (119 loc) · 3.02 KB
/
websocket_server.go
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package websockets
import (
"fmt"
"github.com/gin-gonic/gin"
log "github.com/sirupsen/logrus"
"golang.org/x/net/websocket"
"net/http"
)
type WebSocketPayload struct {
Method string `json:"method"`
Path string `json:"path"`
Payload Message `json:"payload"`
}
type Message struct {
Id string `json:"id"`
Type string `json:"type"`
Attributes map[string]interface{} `json:"attributes"`
}
func (self *Message) String() string {
return fmt.Sprintf("[%v] %v", self.Type, self.Attributes)
}
// Chat server.
type Server struct {
pattern string
clients map[int]*Client
addCh chan *Client
delCh chan *Client
doneCh chan bool
errCh chan error
messageHandler WebSocketConnectionHandler
}
// Create new chat server.
func NewServer(pattern string, messageHandler WebSocketConnectionHandler) *Server {
clients := make(map[int]*Client)
addCh := make(chan *Client)
delCh := make(chan *Client)
doneCh := make(chan bool)
errCh := make(chan error)
return &Server{
pattern: pattern,
clients: clients,
addCh: addCh,
delCh: delCh,
doneCh: doneCh,
errCh: errCh,
messageHandler: messageHandler,
}
}
func (s *Server) Add(c *Client) {
//sessionUser := auth.SessionUser{}
//token, _, ok := c.ws.Request().BasicAuth()
//token := c.ws.Request().FormValue("token")
//if ok {
// log.Infof("New web socket connection token: %v", token)
//}
s.addCh <- c
}
func (s *Server) Del(c *Client) {
s.delCh <- c
}
func (s *Server) Done() {
s.doneCh <- true
}
func (s *Server) Err(err error) {
s.errCh <- err
}
func (s *Server) sendAll(msg *WebSocketPayload) {
for _, c := range s.clients {
c.Write(msg)
}
}
type WebSocketConnectionHandler interface {
MessageFromClient(message WebSocketPayload, request *http.Request)
}
// Listen and serve.
// It serves client connection and broadcast request.
func (s *Server) Listen(router *gin.Engine) {
log.Printf("Listening websocket server at ... %v", s.pattern)
// websocket handler
onConnected := func(ws *websocket.Conn) {
defer func() {
err := ws.Close()
if err != nil {
s.errCh <- err
}
}()
client := NewClient(ws, s)
s.Add(client)
client.Listen()
}
wsHandler := websocket.Handler(onConnected)
router.GET(s.pattern, func(ginContext *gin.Context) {
wsHandler.ServeHTTP(ginContext.Writer, ginContext.Request)
})
log.Println("Created handler")
for {
select {
// Add new a client
case c := <-s.addCh:
log.Println("Added new client")
s.clients[c.id] = c
log.Println("Now", len(s.clients), "clients connected.")
//s.sendPastMessages(c)
// del a client
case c := <-s.delCh:
log.Println("Delete client")
delete(s.clients, c.id)
// // broadcast message for all clients
//case msg := <-s.sendAllCh:
// log.Println("Send all:", msg)
// s.messages = append(s.messages, msg)
// s.sendAll(msg)
case err := <-s.errCh:
log.Println("Error:", err.Error())
case <-s.doneCh:
return
}
}
}