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feat: replicate Ping msgs to backend connection #43

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feat: replicate Ping msgs to backend connection #43

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17 changes: 17 additions & 0 deletions websocketproxy.go
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ import (
"net/http"
"net/url"
"strings"
"time"

"github.com/gorilla/websocket"
)
Expand Down Expand Up @@ -199,6 +200,22 @@ func (w *WebsocketProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
}
}

connPub.SetPingHandler(func(appData string) error {
err := connBackend.WriteControl(websocket.PingMessage, []byte(appData), time.Now().Add(time.Second))
if err != nil {
return err
}

// default behavior from https://github.com/gorilla/websocket/blob/v1.5.0/conn.go#L1161-L1167
err = connPub.WriteControl(websocket.PongMessage, []byte(appData), time.Now().Add(time.Second))
if err == websocket.ErrCloseSent {
return nil
} else if e, ok := err.(net.Error); ok && e.Temporary() {
return nil
}
return err
})

go replicateWebsocketConn(connPub, connBackend, errClient)
go replicateWebsocketConn(connBackend, connPub, errBackend)

Expand Down