sentryecho

README

Official Sentry Echo Handler for Sentry-go SDK

go.dev: https://pkg.go.dev/github.com/getsentry/sentry-go/echo

Example: https://github.com/getsentry/sentry-go/tree/master/_examples/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://pkg.go.dev/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 to 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
    },
})

Documentation

Index

• func GetHubFromContext(ctx echo.Context) *sentry.Hub
• func GetSpanFromContext(ctx echo.Context) *sentry.Span
• func New(options Options) echo.MiddlewareFunc
• type Options

Examples

• GetSpanFromContext

Functions

func GetHubFromContext

func GetHubFromContext(ctx echo.Context) *sentry.Hub

GetHubFromContext retrieves attached *sentry.Hub instance from echo.Context.

func GetSpanFromContext

func GetSpanFromContext(ctx echo.Context) *sentry.Span

GetSpanFromContext retrieves attached *sentry.Span instance from echo.Context. If there is no transaction on echo.Context, it will return nil.

Example

router := echo.New()
router.Use(sentryecho.New(sentryecho.Options{}))
router.GET("/", func(c echo.Context) error {
	expensiveThing := func(ctx context.Context) error {
		span := sentry.StartTransaction(ctx, "expensive_thing")
		defer span.Finish()
		// do resource intensive thing
		return nil
	}

	// Acquire transaction on current hub that's created by the SDK.
	// Be careful, it might be a nil value if you didn't set up sentryecho middleware.
	sentrySpan := sentryecho.GetSpanFromContext(c)
	// Pass in the `.Context()` method from `*sentry.Span` struct.
	// The `context.Context` instance inherits the context from `echo.Context`.
	err := expensiveThing(sentrySpan.Context())
	if err != nil {
		return err
	}

	return c.NoContent(http.StatusOK)
})

func New

func New(options Options) echo.MiddlewareFunc

New returns a function that satisfies echo.HandlerFunc interface It can be used with Use() methods.

Types

type Options

type Options struct {
	// Repanic configures whether Sentry should repanic after recovery, in most cases it should be set to true,
	// as echo includes its own Recover middleware what 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
}