127 lines
2.7 KiB
Go
127 lines
2.7 KiB
Go
package websocket
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
"net/http"
|
|
"sync"
|
|
|
|
"github.com/gorilla/websocket"
|
|
)
|
|
|
|
type (
|
|
OnConnectionFunc func(websocket.Conn)
|
|
)
|
|
|
|
// Server is the websocket server,
|
|
// listens on the config's port, the critical part is the event OnConnection
|
|
type Server interface {
|
|
Set(...OptionSetter)
|
|
Handler() http.Handler
|
|
HandleConnection(*http.Request, *websocket.Conn)
|
|
OnConnection(cb OnConnectionFunc)
|
|
IsConnected(clientID string) bool
|
|
GetClient(clientID string) *Client
|
|
Disconnect(clientID string) error
|
|
}
|
|
|
|
type server struct {
|
|
options *Options
|
|
clients map[string]*client
|
|
clientMTX sync.Mutex
|
|
onConnectionListeners []OnConnectionFunc
|
|
}
|
|
|
|
var _ Server = &server{}
|
|
|
|
var defaultServer = newServer()
|
|
|
|
// server implementation
|
|
|
|
// New creates a websocket server and returns it
|
|
func New(setters ...OptionSetter) Server {
|
|
return newServer(setters...)
|
|
}
|
|
|
|
// newServer creates a websocket server and returns it
|
|
func newServer(setters ...OptionSetter) *server {
|
|
|
|
s := &server{
|
|
clients: make(map[string]*client, 100),
|
|
onConnectionListeners: make([]OnConnectionFunc, 0),
|
|
}
|
|
|
|
s.Set(setters...)
|
|
return s
|
|
}
|
|
|
|
func (s *server) Set(setters ...OptionSetter) {
|
|
for _, setter := range setters {
|
|
setter.Set(s.options)
|
|
}
|
|
|
|
s.options.Validate()
|
|
}
|
|
|
|
func (s *server) Handler() http.Handler {
|
|
o := s.options
|
|
|
|
upgrader := websocket.Upgrader{
|
|
ReadBufferSize: o.ReadBufferSize,
|
|
WriteBufferSize: o.WriteBufferSize,
|
|
Error: o.Error,
|
|
CheckOrigin: o.CheckOrigin}
|
|
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
conn, err := upgrader.Upgrade(w, r, w.Header())
|
|
if err != nil {
|
|
http.Error(w, "Websocket Error: "+err.Error(), http.StatusServiceUnavailable)
|
|
return
|
|
}
|
|
s.HandleConnection(r, conn)
|
|
})
|
|
}
|
|
|
|
func (s *server) HandleConnection(r *http.Request, conn *websocket.Conn) {
|
|
clientID := s.options.IDGenerator(r)
|
|
c := newClient(s, r, conn, clientID)
|
|
err := s.addClient(clientID, c)
|
|
if nil != err {
|
|
log.Println(fmt.Errorf("%v", err))
|
|
return
|
|
}
|
|
}
|
|
|
|
func (s *server) OnConnection(cb OnConnectionFunc) {
|
|
s.onConnectionListeners = append(s.onConnectionListeners, cb)
|
|
}
|
|
|
|
func (s *server) IsConnected(clientID string) bool {
|
|
c := s.clients[clientID]
|
|
return c != nil
|
|
}
|
|
|
|
func (s *server) GetClient(clientID string) *Client {
|
|
return s.clients[clientID]
|
|
}
|
|
|
|
func (s *server) Disconnect(clientID string) error {
|
|
c := s.clients[clientID]
|
|
|
|
if nil == c {
|
|
return nil
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *server) addClient(clientID string, c *client) error {
|
|
s.clientMTX.Lock()
|
|
if s.clients[clientID] != nil {
|
|
return fmt.Errorf("Client[%s] is exist already", clientID)
|
|
}
|
|
s.clients[clientID] = c
|
|
s.clientMTX.Unlock()
|
|
return nil
|
|
}
|