neko/internal/websocket/peer.go
2023-03-31 12:02:19 +02:00

112 lines
2.3 KiB
Go

package websocket
import (
"encoding/json"
"errors"
"sync"
"github.com/gorilla/websocket"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/demodesk/neko/pkg/types"
"github.com/demodesk/neko/pkg/types/event"
"github.com/demodesk/neko/pkg/types/message"
"github.com/demodesk/neko/pkg/utils"
)
type WebSocketPeerCtx struct {
mu sync.Mutex
logger zerolog.Logger
connection *websocket.Conn
}
func newPeer(connection *websocket.Conn) *WebSocketPeerCtx {
logger := log.With().
Str("module", "websocket").
Str("submodule", "peer").
Logger()
return &WebSocketPeerCtx{
logger: logger,
connection: connection,
}
}
func (peer *WebSocketPeerCtx) setSessionID(sessionId string) {
peer.logger = peer.logger.With().Str("session_id", sessionId).Logger()
}
func (peer *WebSocketPeerCtx) Send(event string, payload any) {
peer.mu.Lock()
defer peer.mu.Unlock()
if peer.connection == nil {
return
}
raw, err := json.Marshal(payload)
if err != nil {
peer.logger.Err(err).Str("event", event).Msg("message marshalling has failed")
return
}
err = peer.connection.WriteJSON(types.WebSocketMessage{
Event: event,
Payload: raw,
})
if err != nil {
peer.logger.Err(err).Str("event", event).Msg("send message error")
return
}
// log events if not ignored
if ok, _ := utils.ArrayIn(event, nologEvents); !ok {
if len(raw) > maxPayloadLogLength {
raw = []byte("<truncated>")
}
peer.logger.Debug().
Str("address", peer.connection.RemoteAddr().String()).
Str("event", event).
Str("payload", string(raw)).
Msg("sending message to client")
}
}
func (peer *WebSocketPeerCtx) Ping() error {
peer.mu.Lock()
defer peer.mu.Unlock()
if peer.connection == nil {
return errors.New("peer connection not found")
}
// application level heartbeat
if err := peer.connection.WriteJSON(types.WebSocketMessage{
Event: event.SYSTEM_HEARTBEAT,
}); err != nil {
return err
}
return peer.connection.WriteMessage(websocket.PingMessage, nil)
}
func (peer *WebSocketPeerCtx) Destroy(reason string) {
peer.Send(
event.SYSTEM_DISCONNECT,
message.SystemDisconnect{
Message: reason,
})
peer.mu.Lock()
defer peer.mu.Unlock()
if peer.connection != nil {
err := peer.connection.Close()
peer.logger.Err(err).Msg("peer connection destroyed")
peer.connection = nil
}
}