Detect request cancelation

context_canceled.go

package main

import (
	"fmt"
	"github.com/labstack/echo/v4"
	"net/http"
	"time"
)

func main() {
	e := echo.New()

	e.GET("/", func(context echo.Context) error {
		
		var resp string

		select {
		case <-time.After(2 * time.Second):  // long running process
			resp = "request processed "
		case <-context.Request().Context().Done():
			resp = "request canceled"
		}

		fmt.Println(resp)
		return context.String(http.StatusOK, resp)
	})

	e.Logger.Error(e.Start(":8080"))
}