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sentry.go
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sentry.go
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package config
import (
"github.com/emvi/logbuch"
"github.com/getsentry/sentry-go"
"io"
"net/http"
"os"
"strings"
)
// How to: Logging
// Use logbuch.[Debug|Info|Warn|Error|Fatal]() by default
// Use config.Log().[Debug|Info|Warn|Error|Fatal]() when wanting the log to appear in Sentry as well
type capturingWriter struct {
Writer io.Writer
Message string
}
func (c *capturingWriter) Clear() {
c.Message = ""
}
func (c *capturingWriter) Write(p []byte) (n int, err error) {
c.Message = string(p)
return c.Writer.Write(p)
}
// SentryWrapperLogger is a wrapper around a logbuch.Logger that forwards events to Sentry in addition and optionally allows to attach a request context
type SentryWrapperLogger struct {
*logbuch.Logger
req *http.Request
outWriter *capturingWriter
errWriter *capturingWriter
}
func Log() *SentryWrapperLogger {
ow, ew := &capturingWriter{Writer: os.Stdout}, &capturingWriter{Writer: os.Stderr}
return &SentryWrapperLogger{
Logger: logbuch.NewLogger(ow, ew),
outWriter: ow,
errWriter: ew,
}
}
func (l *SentryWrapperLogger) Request(req *http.Request) *SentryWrapperLogger {
l.req = req
return l
}
func (l *SentryWrapperLogger) Debug(msg string, params ...interface{}) {
l.outWriter.Clear()
l.Logger.Debug(msg, params...)
l.log(l.errWriter.Message, sentry.LevelDebug)
}
func (l *SentryWrapperLogger) Info(msg string, params ...interface{}) {
l.outWriter.Clear()
l.Logger.Info(msg, params...)
l.log(l.errWriter.Message, sentry.LevelInfo)
}
func (l *SentryWrapperLogger) Warn(msg string, params ...interface{}) {
l.outWriter.Clear()
l.Logger.Warn(msg, params...)
l.log(l.errWriter.Message, sentry.LevelWarning)
}
func (l *SentryWrapperLogger) Error(msg string, params ...interface{}) {
l.errWriter.Clear()
l.Logger.Error(msg, params...)
l.log(l.errWriter.Message, sentry.LevelError)
}
func (l *SentryWrapperLogger) Fatal(msg string, params ...interface{}) {
l.errWriter.Clear()
l.Logger.Fatal(msg, params...)
l.log(l.errWriter.Message, sentry.LevelFatal)
}
func (l *SentryWrapperLogger) log(msg string, level sentry.Level) {
event := sentry.NewEvent()
event.Level = level
event.Message = msg
if l.req != nil {
if h := l.req.Context().Value(sentry.HubContextKey); h != nil {
hub := h.(*sentry.Hub)
hub.Scope().SetRequest(l.req)
if uid := getPrincipal(l.req); uid != "" {
hub.Scope().SetUser(sentry.User{ID: uid})
}
hub.CaptureEvent(event)
return
}
}
sentry.CaptureEvent(event)
}
var excludedRoutes = []string{
"GET /assets",
"GET /api/health",
"GET /swagger-ui",
"GET /docs",
}
func initSentry(config sentryConfig, debug bool) {
if err := sentry.Init(sentry.ClientOptions{
Dsn: config.Dsn,
Debug: debug,
AttachStacktrace: true,
EnableTracing: config.EnableTracing,
TracesSampler: func(ctx sentry.SamplingContext) float64 {
txName := ctx.Span.Name
for _, ex := range excludedRoutes {
if strings.HasPrefix(txName, ex) {
return 0.0
}
}
if txName == "POST /api/heartbeat" {
return float64(config.SampleRateHeartbeats)
}
return float64(config.SampleRate)
},
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 {
if uid := getPrincipal(req); uid != "" {
event.User.ID = uid
}
}
}
return event
},
}); err != nil {
logbuch.Fatal("failed to initialized sentry - %v", err)
}
}
// returns a user id
func getPrincipal(r *http.Request) string {
type principalIdentityGetter interface {
GetPrincipalIdentity() string
}
if p := r.Context().Value("principal"); p != nil {
return p.(principalIdentityGetter).GetPrincipalIdentity()
}
return ""
}