Echo

Echo Handler for Sentry-go SDK

Godoc: https://godoc.org/github.com/getsentry/sentry-go/echo

Example: https://github.com/getsentry/sentry-go/tree/master/example/echo

Installation

$ go get github.com/getsentry/sentry-go/echo
import (
	"fmt"
	"net/http"

	"github.com/getsentry/sentry-go"
	sentryecho "github.com/getsentry/sentry-go/echo"
	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
)

// To initialize Sentry's handler, you need to initialize Sentry itself beforehand
if err := sentry.Init(sentry.ClientOptions{
	Dsn: "your-public-dsn",
}); err != nil {
	fmt.Printf("Sentry initialization failed: %v\n", err)
}

// Then create your app
app := echo.New()

app.Use(middleware.Logger())
app.Use(middleware.Recover())

// Once it's done, you can attach the handler as one of your middleware
app.Use(sentryecho.New(sentryecho.Options{}))

// Set up routes
app.GET("/", func(ctx echo.Context) error {
	return ctx.String(http.StatusOK, "Hello, World!")
})

// And run it
app.Logger.Fatal(app.Start(":3000"))

Configuration

sentryecho accepts a struct of Options that allows you to configure how the handler will behave.

Currently it respects 3 options:

// Repanic configures whether Sentry should repanic after recovery, in most cases it should be set to true,
// as echo includes its own Recover middleware that handles http responses.
Repanic bool
// WaitForDelivery configures whether you want to block the request before moving forward with the response.
// Because Echo's `Recover` handler doesn't restart the application,
// it's safe to either skip this option or set it to `false`.
WaitForDelivery bool
// Timeout for the event delivery requests.
Timeout time.Duration

Usage

sentryecho attaches an instance of *sentry.Hub (https://godoc.org/github.com/getsentry/sentry-go#Hub) to the echo.Context, which makes it available throughout the rest of the request’s lifetime. You can access it by using the sentryecho.GetHubFromContext() method on the context itself in any of your proceeding middleware and routes. And it should be used instead of the global sentry.CaptureMessage, sentry.CaptureException or any other calls, as it keeps the separation of data between the requests.

Keep in mind that *sentry.Hub won’t be available in middleware attached before sentryecho!

app := echo.New()

app.Use(middleware.Logger())
app.Use(middleware.Recover())

app.Use(sentryecho.New(sentryecho.Options{
	Repanic: true,
}))

app.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
	return func(ctx echo.Context) error {
		if hub := sentryecho.GetHubFromContext(ctx); hub != nil {
			hub.Scope().SetTag("someRandomTag", "maybeYouNeedIt")
		}
		return next(ctx)
	}
})

app.GET("/", func(ctx echo.Context) error {
	if hub := sentryecho.GetHubFromContext(ctx); hub != nil {
		hub.WithScope(func(scope *sentry.Scope) {
			scope.SetExtra("unwantedQuery", "someQueryDataMaybe")
			hub.CaptureMessage("User provided unwanted query string, but we recovered just fine")
		})
	}
	return ctx.String(http.StatusOK, "Hello, World!")
})

app.GET("/foo", func(ctx echo.Context) error {
	// sentryecho handler will catch it just fine. Also, because we attached "someRandomTag"
	// in the middleware before, it will be sent through as well
	panic("y tho")
})

app.Logger.Fatal(app.Start(":3000"))

Accessing Request in BeforeSend callback

sentry.Init(sentry.ClientOptions{
	Dsn: "your-public-dsn",
	BeforeSend: func(event *sentry.Event, hint *sentry.EventHint) *sentry.Event {
		if hint.Context != nil {
			if req, ok := hint.Context.Value(sentry.RequestContextKey).(*http.Request); ok {
				// You have access to the original Request here
			}
		}

		return event
	},
})