forked from stefanprodan/podinfo
/
echows.go
90 lines (84 loc) · 1.84 KB
/
echows.go
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package api
import (
"net/http"
"strings"
"time"
"github.com/gorilla/websocket"
"go.uber.org/zap"
)
var wsCon = websocket.Upgrader{}
// EchoWS godoc
// @Summary Echo over websockets
// @Description echos content via websockets
// @Tags HTTP API
// @Accept json
// @Produce json
// @Router /ws/echo [post]
// @Success 202 {object} api.MapResponse
// Test: go run ./cmd/podcli/* ws localhost:9898/ws/echo
func (s *Server) echoWsHandler(w http.ResponseWriter, r *http.Request) {
c, err := wsCon.Upgrade(w, r, nil)
if err != nil {
if err != nil {
s.logger.Warn("websocket upgrade error", zap.Error(err))
return
}
}
defer c.Close()
done := make(chan struct{})
defer close(done)
in := make(chan interface{})
defer close(in)
go s.writeWs(c, in)
go s.sendHostWs(c, in, done)
for {
_, message, err := c.ReadMessage()
if err != nil {
if !strings.Contains(err.Error(), "close") {
s.logger.Warn("websocket read error", zap.Error(err))
}
break
}
var response = struct {
Time time.Time `json:"ts"`
Message string `json:"msg"`
}{
Time: time.Now(),
Message: string(message),
}
in <- response
}
}
func (s *Server) sendHostWs(ws *websocket.Conn, in chan interface{}, done chan struct{}) {
ticker := time.NewTicker(5 * time.Second)
defer ticker.Stop()
for {
select {
case <-ticker.C:
var status = struct {
Time time.Time `json:"ts"`
Host string `json:"server"`
}{
Time: time.Now(),
Host: s.config.Hostname,
}
in <- status
case <-done:
s.logger.Debug("websocket exit")
return
}
}
}
func (s *Server) writeWs(ws *websocket.Conn, in chan interface{}) {
for {
select {
case msg := <-in:
if err := ws.WriteJSON(msg); err != nil {
if !strings.Contains(err.Error(), "close") {
s.logger.Warn("websocket write error", zap.Error(err))
}
return
}
}
}
}