Fibersentry

Sentry support for Fiber.

Note: Requires Go 1.18 and above

Install

This middleware supports Fiber v2.

go get -u github.com/gofiber/fiber/v2
go get -u github.com/gofiber/contrib/fibersentry
go get -u github.com/getsentry/sentry-go

Signature

fibersentry.New(config ...fibersentry.Config) fiber.Handler

Config

Property	Type	Description	Default
Repanic	bool	Repanic configures whether Sentry should repanic after recovery. Set to true, if Recover middleware is used.	false
WaitForDelivery	bool	WaitForDelivery configures whether you want to block the request before moving forward with the response. If Recover middleware is used, it's safe to either skip this option or set it to false.	false
Timeout	time.Duration	Timeout for the event delivery requests.	time.Second * 2

Usage

fibersentry 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 fibersentry.GetHubFromContext() or fibersentry.MustGetHubFromContext() method on the context itself in any of your proceeding middleware and routes. Keep in mind that *sentry.Hub 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 fibersentry. In this case, GetHubFromContext() returns nil, and MustGetHubFromContext() will panic.

package main

import (
	"fmt"
	"log"

	"github.com/getsentry/sentry-go"
	"github.com/gofiber/contrib/fibersentry"
	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/utils"
)

func main() {
	_ = sentry.Init(sentry.ClientOptions{
		Dsn: "",
		BeforeSend: func(event *sentry.Event, hint *sentry.EventHint) *sentry.Event {
			if hint.Context != nil {
				if c, ok := hint.Context.Value(sentry.RequestContextKey).(*fiber.Ctx); ok {
					// You have access to the original Context if it panicked
					fmt.Println(utils.ImmutableString(c.Hostname()))
				}
			}
			fmt.Println(event)
			return event
		},
		Debug:            true,
		AttachStacktrace: true,
	})

	app := fiber.New()

	app.Use(fibersentry.New(fibersentry.Config{
		Repanic:         true,
		WaitForDelivery: true,
	}))

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

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

	app.All("/", func(c *fiber.Ctx) error {
		if hub := fibersentry.GetHubFromContext(c); 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 c.SendStatus(fiber.StatusOK)
	})

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