How to get Recover Stack log information

[OneSeven]

The output of the Recover Stack log is unformatted json information, and I can't see the problem intuitively. And Recover does not have a custom handler

[aldas]

There are some improvements currently in latest but those are not released yet. Please see #2072 for alternatives until v4.7.0 will be released.

This is pretty much same functionality as recovery mw has (except stacktrace)

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

	e.Use(middleware.Logger())

	customRecovery := func(next echo.HandlerFunc) echo.HandlerFunc {
		return func(c echo.Context) (err error) {
			defer func() {
				if r := recover(); r != nil {
					rErr, ok := r.(error)
					if !ok {
						rErr = fmt.Errorf("%v", r)
					}
					// c.Logger().Error(rErr)  // you do not need to log here. Logger middleware is up in chain.
					err = rErr // allows upstream middlewares to receive recovered error
				}
			}()
			return next(c)
		}
	}
	e.Use(customRecovery)

	e.GET("/", func(c echo.Context) error {
		panic(errors.New("test"))
	})

	log.Fatal(e.Start(":8080"))
}

[OneSeven]

thanks.
Is it possible to add a configuration to set the format of the Stack log output?
When will 4.7 be released?

[OneSeven]

@aldas Hi，4.7 verison Is it possible to add a configuration to set the format of the Stack log output?

[aldas]

v4.7.0 allows you to log stack in any format you like. You need to implement your own logging function

This is where it is called:

echo/middleware/recover.go

Lines 93 to 95 in 4a1ccdf

	if config.LogErrorFunc != nil {
	err = config.LogErrorFunc(c, err, stack)
	} else if !config.DisablePrintStack {

Meanwhile you can create your own middleware as:

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

	e.Use(middleware.Logger())

	customRecovery := func(next echo.HandlerFunc) echo.HandlerFunc {
		return func(c echo.Context) (err error) {
			defer func() {
				if r := recover(); r != nil {
					rErr, ok := r.(error)
					if !ok {
						rErr = fmt.Errorf("%v", r)
					}
					stack = make([]byte, 4000)
					length = runtime.Stack(stack, true)
                                        // replace with whatever logging library you use
					c.Logger().Print(fmt.Sprintf("[PANIC RECOVER] %v %s\n", err, stack[:length]))

					err = rErr // allows upstream middlewares to receive recovered error
				}
			}()
			return next(c)
		}
	}
	e.Use(customRecovery)

	e.GET("/", func(c echo.Context) error {
		panic(errors.New("test"))
	})

	log.Fatal(e.Start(":8080"))
}