sentryhttp

README

Official Sentry net/http Handler for Sentry-go SDK

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

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

Installation

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

import (
    "fmt"
    "net/http"

    "github.com/getsentry/sentry-go"
    sentryhttp "github.com/getsentry/sentry-go/http"
)

// 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 sentryhttp
sentryHandler := sentryhttp.New(sentryhttp.Options{})

// Once it's done, you can setup routes and attach the handler as one of your middleware
http.Handle("/", sentryHandler.Handle(&handler{}))
http.HandleFunc("/foo", sentryHandler.HandleFunc(func(rw http.ResponseWriter, r *http.Request) {
    panic("y tho")
}))

fmt.Println("Listening and serving HTTP on :3000")

// And run it
if err := http.ListenAndServe(":3000", nil); err != nil {
    panic(err)
}

Configuration

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

Currently it respects 3 options:

// Whether Sentry should repanic after recovery, in most cases it should be set to true,
// and you should gracefully handle http responses.
Repanic         bool
// Whether you want to block the request before moving forward with the response.
// Useful, when you want to restart the process after it panics.
WaitForDelivery bool
// Timeout for the event delivery requests.
Timeout         time.Duration

Usage

sentryhttp 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 sentry.GetHubFromContext() method on the request 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 sentryhttp!

type handler struct{}

func (h *handler) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
	if hub := sentry.GetHubFromContext(r.Context()); hub != nil {
		hub.WithScope(func(scope *sentry.Scope) {
			scope.SetExtra("unwantedQuery", "someQueryDataMaybe")
			hub.CaptureMessage("User provided unwanted query string, but we recovered just fine")
		})
	}
	rw.WriteHeader(http.StatusOK)
}

func enhanceSentryEvent(handler http.HandlerFunc) http.HandlerFunc {
	return func(rw http.ResponseWriter, r *http.Request) {
		if hub := sentry.GetHubFromContext(r.Context()); hub != nil {
			hub.Scope().SetTag("someRandomTag", "maybeYouNeedIt")
		}
		handler(rw, r)
	}
}

// Later in the code

sentryHandler := sentryhttp.New(sentryhttp.Options{
    Repanic: true,
})

http.Handle("/", sentryHandler.Handle(&handler{}))
http.HandleFunc("/foo", sentryHandler.HandleFunc(
    enhanceSentryEvent(func(rw http.ResponseWriter, r *http.Request) {
        panic("y tho")
    }),
))

fmt.Println("Listening and serving HTTP on :3000")

if err := http.ListenAndServe(":3000", nil); err != nil {
    panic(err)
}

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
    },
})

Documentation

Index

• type Handler
  • func New(options Options) *Handler
  • func (h *Handler) Handle(handler http.Handler) http.Handler
  • func (h *Handler) HandleFunc(handler http.HandlerFunc) http.HandlerFunc
• type Options

Types

type Handler

type Handler struct {
	// contains filtered or unexported fields
}

func New

func New(options Options) *Handler

New returns a struct that provides Handle and HandleFunc methods that satisfy http.Handler and http.HandlerFunc interfaces.

func (*Handler) Handle

func (h *Handler) Handle(handler http.Handler) http.Handler

Handle wraps http.Handler and recovers from caught panics.

func (*Handler) HandleFunc

func (h *Handler) HandleFunc(handler http.HandlerFunc) http.HandlerFunc

HandleFunc wraps http.HandleFunc and recovers from caught panics.

type Options

type Options struct {
	// Repanic configures whether Sentry should repanic after recovery
	Repanic bool
	// WaitForDelivery indicates whether to wait until panic details have been
	// sent to Sentry before panicking or proceeding with a request.
	WaitForDelivery bool
	// Timeout for the event delivery requests.
	Timeout time.Duration
}