/
websocket.go
67 lines (56 loc) · 1.35 KB
/
websocket.go
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package main
import (
"fmt"
"net/http"
"strings"
"time"
"github.com/gorilla/websocket"
"github.com/labstack/echo"
)
var upgrader = websocket.Upgrader{
CheckOrigin: func(r *http.Request) bool { return true },
}
func ws(c echo.Context) error {
ws, err := upgrader.Upgrade(c.Response(), c.Request(), nil)
if err != nil {
return err
}
defer ws.Close()
id := c.QueryParam("id")
if id == "" {
return echo.NewHTTPError(http.StatusBadRequest, "Invalid ID")
}
data, ok := callbacks[id]
if !ok {
return echo.NewHTTPError(http.StatusBadRequest, "Invalid ID")
}
currentStatus := data.statusCallback()
_, err = writeMessage(ws, currentStatus)
if err != nil {
fmt.Println(err)
}
for {
if currentStatus != data.statusCallback() {
currentStatus = data.statusCallback()
shouldStop, err := writeMessage(ws, currentStatus)
if err != nil {
fmt.Println(err)
}
if shouldStop {
break
}
}
time.Sleep(50 * time.Millisecond)
}
return nil
}
func writeMessage(ws *websocket.Conn, message string) (shouldStop bool, err error) {
shouldStop = false
if message == "Done" || strings.HasPrefix(message, "Error: ") {
shouldStop = true
err = ws.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, message))
return
}
err = ws.WriteMessage(websocket.TextMessage, []byte(message))
return
}