generated from stewkk/iu9lab
/
3.go
74 lines (62 loc) · 1.3 KB
/
3.go
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package main
import (
"context"
"log"
"net"
"net/http"
"time"
"github.com/julienschmidt/httprouter"
"github.com/stewkk/iu9-networks/lab3/pkg/kommersant"
"nhooyr.io/websocket"
"nhooyr.io/websocket/wsjson"
_ "github.com/go-sql-driver/mysql"
)
func main() {
router := httprouter.New()
router.GET("/", WsHandler)
s := &http.Server{
Handler: router,
ReadTimeout: time.Second * 10,
WriteTimeout: time.Second * 10,
}
l, err := net.Listen("tcp", ":8083")
if err != nil {
log.Fatal(err)
}
log.Printf("listening on http://%v", l.Addr())
log.Fatal(s.Serve(l))
}
func WsHandler(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
c, err := websocket.Accept(w, r, nil)
if err != nil {
log.Println(err)
return
}
defer c.Close(websocket.StatusInternalError, "")
err = subscribe(c)
if websocket.CloseStatus(err) == websocket.StatusNormalClosure ||
websocket.CloseStatus(err) == websocket.StatusGoingAway {
return
}
if err != nil {
log.Println(err)
return
}
}
func subscribe(c *websocket.Conn) error {
for {
news, err := kommersant.List()
if err != nil {
return err
}
err = wsjson.Write(context.TODO(), c, struct {
Entries []kommersant.NewsEntry `json:"entries"`
}{
Entries: news,
})
if err != nil {
return err
}
time.Sleep(time.Second)
}
}