Official Sentry fiber Handler for Sentry-go SDK

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

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

Installation

go get github.com/getsentry/sentry-go/fiber

import (
	"fmt"
	"github.com/gofiber/fiber/v2"
	"github.com/getsentry/sentry-go"
	sentryfiber "github.com/getsentry/sentry-go/fiber"
	"github.com/gofiber/fiber/v2/utils"
)

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)
}

// Create an instance of sentryfiber
sentryHandler := sentryfiber.New(sentryfiber.Options{})

// Once it's done, you can attach the handler as one of your middlewares
app := fiber.New()

app.Use(sentryHandler)

// And run it
app.Listen(":3000")

Configuration

sentryfiber 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 false,
// as fasthttp doesn't include it's own Recovery handler.
Repanic bool
// WaitForDelivery configures whether you want to block the request before moving forward with the response.
// Because fasthttp doesn't include it's own `Recovery` handler, it will restart the application,
// and event won't be delivered otherwise.
WaitForDelivery bool
// Timeout for the event delivery requests.
Timeout time.Duration

Usage

sentryfiber attaches an instance of *sentry.Hub (https://godoc.org/github.com/getsentry/sentry-go#Hub) to the request's context, which makes it available throughout the rest of the request's lifetime. You can access it by using the sentryfiber.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 to sentryfiber!

// Later in the code
sentryHandler := sentryfiber.New(sentryfiber.Options{
    Repanic:         true,
    WaitForDelivery: true,
})

enhanceSentryEvent := func(ctx *fiber.Ctx) {
    if hub := sentryfiber.GetHubFromContext(ctx); hub != nil {
        hub.Scope().SetTag("someRandomTag", "maybeYouNeedIt")
    }
    ctx.Next()
}

app := fiber.New()

app.Use(sentryHandler)

app.All("/foo", enhanceSentryEvent, func(ctx *fiber.Ctx) {
    panic("y tho")
})

app.All("/", func(ctx *fiber.Ctx) {
    if hub := sentryfiber.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")
        })
    }
    ctx.Status(fiber.StatusOK)
})

app.Listen(":3000")

Accessing Context 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 ctx, ok := hint.Context.Value(sentry.RequestContextKey).(*fiber.Ctx); ok {
				// You have access to the original Context if it panicked
				fmt.Println(ctx.Hostname())
			}
		}
		return event
	},
})