forked from VolantMQ/volantmq
/
websocket.go
155 lines (123 loc) · 2.97 KB
/
websocket.go
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package transport
import (
"context"
"net/http"
"time"
"github.com/VolantMQ/volantmq/configuration"
"github.com/VolantMQ/volantmq/systree"
"github.com/gorilla/websocket"
"go.uber.org/zap"
)
type httpServer struct {
mux *http.ServeMux
http *http.Server
}
// ConfigWS listener object for websocket server
type ConfigWS struct {
// CertFile
CertFile string
// KeyFile
KeyFile string
// Path
Path string
// SubProtocols
SubProtocols []string
transport *Config
}
type ws struct {
baseConfig
up *websocket.Upgrader
s httpServer
certFile string
keyFile string
}
// NewConfigWS allocate new transport config for websocket transport
// Use of this function is preferable instead of direct allocation of ConfigWS
func NewConfigWS(transport *Config) *ConfigWS {
return &ConfigWS{
Path: "/",
transport: transport,
}
}
// NewWS create new websocket transport
func NewWS(config *ConfigWS, internal *InternalConfig) (Provider, error) {
l := &ws{
certFile: config.CertFile,
keyFile: config.KeyFile,
up: &websocket.Upgrader{},
}
l.quit = make(chan struct{})
l.InternalConfig = *internal
l.config = *config.transport
if len(l.certFile) != 0 {
l.protocol = "wss"
} else {
l.protocol = "ws"
}
l.log = configuration.GetLogger().Named("listener: " + l.protocol + "://:" + config.transport.Port)
if len(config.Path) == 0 {
config.Path = "/"
}
l.up.Subprotocols = config.SubProtocols
l.s.mux = http.NewServeMux()
l.s.mux.HandleFunc(config.Path, l.serveWs)
l.s.http = &http.Server{
Addr: ":" + config.transport.Port,
Handler: &l.s,
}
return l, nil
}
// ServeHTTP http connection upgrade
func (s *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
s.mux.ServeHTTP(w, r)
}
// NewConnWs initiate connection with websocket.Conn ws object and stat
func (l *ws) newConnWs(conn *websocket.Conn, stat systree.BytesMetric) (Conn, error) {
c := &connWs{
conn: conn,
stat: stat,
}
return c, nil
}
func (l *ws) serveWs(w http.ResponseWriter, r *http.Request) {
cn, err := l.up.Upgrade(w, r, nil)
if err != nil {
l.log.Error("Couldn't upgrade WebSocket connection", zap.Error(err))
return
}
l.onConnection.Add(1)
go func(cn *websocket.Conn) {
//defer l.onConnection.Done()
//if inConn, e := newConnWs(cn, l.Metric.Bytes()); e != nil {
// l.log.Error("Couldn't create connection interface", zap.Error(e))
//} else {
// l.handleConnection(inConn)
//}
}(cn)
}
func (l *ws) Ready() error {
return nil
}
func (l *ws) Alive() error {
return nil
}
func (l *ws) Serve() error {
var e error
if len(l.certFile) != 0 && len(l.keyFile) != 0 {
e = l.s.http.ListenAndServeTLS(l.certFile, l.keyFile)
} else {
e = l.s.http.ListenAndServe()
}
return e
}
// Close websocket connection
func (l *ws) Close() error {
var err error
l.onceStop.Do(func() {
ctx, ctxCancel := context.WithTimeout(context.Background(), 5*time.Second)
defer ctxCancel()
err = l.s.http.Shutdown(ctx)
l.onConnection.Wait()
})
return err
}