80 lines
1.6 KiB
Go
80 lines
1.6 KiB
Go
package api
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import (
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"time"
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"github.com/gin-gonic/gin"
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"github.com/gorilla/websocket"
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"github.com/photoprism/photoprism/internal/config"
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"github.com/photoprism/photoprism/internal/event"
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)
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var wsConnection = websocket.Upgrader{}
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var wsTimeout = 60 * time.Second
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func wsReader(ws *websocket.Conn) {
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defer ws.Close()
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ws.SetReadLimit(512)
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ws.SetReadDeadline(time.Now().Add(wsTimeout))
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ws.SetPongHandler(func(string) error { ws.SetReadDeadline(time.Now().Add(wsTimeout)); return nil })
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for {
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_, m, err := ws.ReadMessage()
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if err != nil {
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break
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}
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log.Infof("received: %s", m)
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}
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}
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func wsWriter(ws *websocket.Conn, conf *config.Config) {
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pingTicker := time.NewTicker(10 * time.Second)
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s := event.Subscribe("index.*", "alert.*")
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defer func() {
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pingTicker.Stop()
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event.Unsubscribe(s)
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ws.Close()
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}()
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for {
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select {
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case <-pingTicker.C:
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ws.SetWriteDeadline(time.Now().Add(10 * time.Second))
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if err := ws.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
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return
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}
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case msg := <-s.Receiver:
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ws.SetWriteDeadline(time.Now().Add(10 * time.Second))
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if err := ws.WriteJSON(gin.H{"event": msg.Name, "data": msg.Fields}); err != nil {
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log.Errorf("write json: %s", err)
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return
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}
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}
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}
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}
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// GET /api/v1/ws
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func Websocket(router *gin.RouterGroup, conf *config.Config) {
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router.GET("/ws", func(c *gin.Context) {
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w := c.Writer
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r := c.Request
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ws, err := wsConnection.Upgrade(w, r, nil)
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if err != nil {
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log.Errorf("upgrade error: %s", err)
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return
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}
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defer ws.Close()
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log.Infof("websocket connected: %s", c.Request.RemoteAddr)
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go wsWriter(ws, conf)
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wsReader(ws)
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})
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}
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