101 lines
1.9 KiB
Go
101 lines
1.9 KiB
Go
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package websocketbase
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import (
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"context"
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"sync"
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"time"
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"github.com/gorilla/websocket"
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)
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// WebsocketClientBase is a legacy base client
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// Deprecated: please use standard stream instead.
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//go:generate callbackgen -type WebsocketClientBase
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type WebsocketClientBase struct {
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baseURL string
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// mu protects conn
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mu sync.Mutex
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conn *websocket.Conn
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reconnectC chan struct{}
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reconnectDuration time.Duration
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connectedCallbacks []func(conn *websocket.Conn)
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disconnectedCallbacks []func(conn *websocket.Conn)
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messageCallbacks []func(message []byte)
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errorCallbacks []func(err error)
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}
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func NewWebsocketClientBase(baseURL string, reconnectDuration time.Duration) *WebsocketClientBase {
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return &WebsocketClientBase{
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baseURL: baseURL,
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reconnectC: make(chan struct{}, 1),
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reconnectDuration: reconnectDuration,
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}
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}
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func (s *WebsocketClientBase) Listen(ctx context.Context) {
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for {
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select {
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case <-ctx.Done():
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return
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case <-s.reconnectC:
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time.Sleep(s.reconnectDuration)
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if err := s.connect(ctx); err != nil {
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s.Reconnect()
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}
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default:
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conn := s.Conn()
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mt, msg, err := conn.ReadMessage()
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if err != nil {
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s.Reconnect()
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continue
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}
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if mt != websocket.TextMessage {
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continue
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}
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s.EmitMessage(msg)
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}
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}
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}
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func (s *WebsocketClientBase) Connect(ctx context.Context) error {
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if err := s.connect(ctx); err != nil {
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return err
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}
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go s.Listen(ctx)
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return nil
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}
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func (s *WebsocketClientBase) Reconnect() {
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select {
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case s.reconnectC <- struct{}{}:
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default:
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}
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}
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func (s *WebsocketClientBase) connect(ctx context.Context) error {
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dialer := websocket.DefaultDialer
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conn, _, err := dialer.DialContext(ctx, s.baseURL, nil)
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if err != nil {
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return err
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}
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s.mu.Lock()
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s.conn = conn
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s.mu.Unlock()
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s.EmitConnected(conn)
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return nil
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}
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func (s *WebsocketClientBase) Conn() *websocket.Conn {
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s.mu.Lock()
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defer s.mu.Unlock()
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return s.conn
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}
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