Gin

Gin is a high-performance HTTP web framework written in Golang. Learn how to set it up with Sentry.

For a quick reference, there is a complete example at the Go SDK source code repository.

Go Dev-style API documentation is also available.

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

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err := sentry.Init(sentry.ClientOptions{
    Dsn: "https://examplePublicKey@o0.ingest.sentry.io/0",
    // Enable printing of SDK debug messages.
    // Useful when getting started or trying to figure something out.
    Debug: true,
    // Adds request headers and IP for users,
    // visit: https://docs.sentry.io/platforms/go/data-management/data-collected/ for more info
    SendDefaultPII: true,
    //  performance
    EnableTracing: true,
    // Set TracesSampleRate to 1.0 to capture 100%
    // of transactions for tracing.
    TracesSampleRate: 1.0,
    //  performance
    //  logs
    EnableLogs: true,
    //  logs
})
if err != nil {
    log.Fatalf("sentry.Init: %s", err)
}
// Flush buffered events before the program terminates.
// Set the timeout to the maximum duration the program can afford to wait.
defer sentry.Flush(2 * time.Second)

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

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// Whether Sentry should repanic after recovery, in most cases it should be set to true,
// as gin.Default includes its own Recovery middleware that handles http responses.
Repanic bool
// Whether you want to block the request before moving forward with the response.
// Because Gin's default `Recovery` 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
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app := gin.Default()
app.Use(sentrygin.New(sentrygin.Options{
    // you can modify these options
    Repanic:         true,
    WaitForDelivery: false,
    Timeout:         5 * time.Second,
}))

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app := gin.Default()

// you can attach the handler as one of your middleware
app.Use(sentrygin.New(sentrygin.Options{
// specify options here...
}))

// Set up routes
app.GET("/", func(ctx *gin.Context) {
	// capturing an error intentionally to simulate usage
	sentry.CaptureMessage("It works!")
	
	ctx.String(http.StatusOK, "Hello world!")
})

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

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

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app := gin.Default()

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

app.Use(func(ctx *gin.Context) {
	if hub := sentrygin.GetHubFromContext(ctx); hub != nil {
		hub.Scope().SetTag("someRandomTag", "maybeYouNeedIt")
	}
	ctx.Next()
})

app.GET("/", func(ctx *gin.Context) {
	if hub := sentrygin.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(http.StatusOK)
})

app.GET("/foo", func(ctx *gin.Context) {
	// sentrygin 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.Run(":3000")

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sentry.Init(sentry.ClientOptions{
	Dsn: "https://examplePublicKey@o0.ingest.sentry.io/0",
	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
	},
})
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