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sentrywriter.go
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/
sentrywriter.go
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package sentry
import (
"encoding/json"
"io"
"time"
"unsafe"
"github.com/buger/jsonparser"
"github.com/getsentry/sentry-go"
"github.com/rs/zerolog"
"github.com/fluxninja/aperture/pkg/info"
"github.com/fluxninja/aperture/pkg/log"
"github.com/fluxninja/aperture/pkg/panichandler"
"github.com/fluxninja/aperture/pkg/status"
)
var _ = io.WriteCloser(new(SentryWriter))
const (
// SentryFlushWait is the duration to wait for the sentry client to flush its queue.
SentryFlushWait = "5000ms"
)
var zerologToSentryLevel = map[zerolog.Level]sentry.Level{
log.DebugLevel: sentry.LevelDebug,
log.InfoLevel: sentry.LevelInfo,
log.WarnLevel: sentry.LevelWarning,
log.ErrorLevel: sentry.LevelError,
log.FatalLevel: sentry.LevelFatal,
log.PanicLevel: sentry.LevelFatal,
}
// SentryWriter is a writer that forwards the data to the sentry client and the CrashWriter.
type SentryWriter struct {
client *sentry.Client
levels map[zerolog.Level]struct{}
crashWriter *CrashWriter
statusRegistry status.Registry
}
// Write implements io.Writer and forwards the data to CrashWriter buffer.
func (s *SentryWriter) Write(data []byte) (int, error) {
level, ok := s.parseLogLevel(data)
if ok {
if level == sentry.LevelFatal {
// Parse log event only when it is fatal level and the event needs to be captured.
event, err := s.parseLogEvent(level, data)
if err != nil {
log.Error().Err(err).Msg("Failed to parse log event")
} else {
s.client.CaptureEvent(event, nil, nil)
}
_ = s.Close()
} else {
_, _ = s.crashWriter.Write(data)
}
}
return len(data), nil
}
func (s *SentryWriter) parseLogLevel(data []byte) (sentry.Level, bool) {
levelStr, err := jsonparser.GetUnsafeString(data, zerolog.LevelFieldName)
if err != nil {
return "", false
}
level, err := zerolog.ParseLevel(levelStr)
if err != nil {
return "", false
}
_, enabled := s.levels[level]
if !enabled {
return "", false
}
sentryLevel, ok := zerologToSentryLevel[level]
if !ok {
return "", false
}
return sentryLevel, true
}
func (s *SentryWriter) parseLogEvent(level sentry.Level, data []byte) (*sentry.Event, error) {
event := sentry.Event{
Timestamp: time.Now(),
Level: level,
Logger: "zerolog",
}
err := jsonparser.ObjectEach(data, func(key, value []byte, _ jsonparser.ValueType, _ int) error {
switch string(key) {
case zerolog.MessageFieldName:
event.Message = bytesToStrUnsafe(value)
case zerolog.ErrorFieldName:
event.Exception = append(event.Exception, sentry.Exception{
Value: bytesToStrUnsafe(value),
})
}
return nil
})
if err != nil {
return nil, err
}
return &event, nil
}
// Close implements io.Closer and wait for the sentry client to flush its queue.
func (s *SentryWriter) Close() error {
duration, _ := time.ParseDuration(SentryFlushWait)
s.client.Flush(duration)
return nil
}
func bytesToStrUnsafe(data []byte) string {
return *(*string)(unsafe.Pointer(&data))
}
// sentryPanicHandler is a panic handler that sends the fatal level event to Sentry with diagnostic information.
func (s *SentryWriter) sentryPanicHandler(e interface{}, _ panichandler.Callstack) {
duration, _ := time.ParseDuration(SentryFlushWait)
// Crash Log
crashLogs := s.crashWriter.GetCrashLogs()
for _, crashLog := range crashLogs {
levelStr, ok := crashLog["level"].(string)
if !ok {
levelStr = "info"
}
level, err := zerolog.ParseLevel(levelStr)
if err != nil {
level = zerolog.InfoLevel
}
sentryLevel := zerologToSentryLevel[level]
delete(crashLog, "level")
msg, ok := crashLog["message"].(string)
if !ok {
msg = ""
}
delete(crashLog, "message")
timestamp, ok := crashLog["timestamp"].(time.Time)
if !ok {
timestamp = time.Now()
}
delete(crashLog, "timestamp")
sentry.AddBreadcrumb(&sentry.Breadcrumb{
Type: "debug",
Category: "log",
Level: sentryLevel,
Data: crashLog,
Message: msg,
Timestamp: timestamp,
})
}
if s.statusRegistry != nil {
// Dump Status Registry
if status := s.statusRegistry.GetGroupStatus(); status != nil {
groupStatus, err := json.Marshal(status)
if err != nil {
log.Error().Err(err).Msg("Failed to marshal status registry")
}
statusData := make(map[string]interface{})
err = json.Unmarshal(groupStatus, &statusData)
if err != nil {
log.Error().Err(err).Msg("Failed to unmarshal status registry")
}
sentry.AddBreadcrumb(&sentry.Breadcrumb{
Category: "Status Registry",
Level: sentry.LevelInfo,
Data: statusData,
})
} else {
sentry.AddBreadcrumb(&sentry.Breadcrumb{
Category: "Status Registry",
Level: sentry.LevelInfo,
Message: "No Status Registry found",
})
}
}
// Service Version Information
versionInfo := info.GetVersionInfo()
if versionInfo != nil {
vInfo, err := json.Marshal(versionInfo)
if err != nil {
log.Error().Err(err).Msg("Failed to marshal version information")
}
versionData := make(map[string]interface{})
err = json.Unmarshal(vInfo, &versionData)
if err != nil {
log.Error().Err(err).Msg("Failed to unmarshal version information")
}
sentry.AddBreadcrumb(&sentry.Breadcrumb{
Category: "Version Information",
Level: sentry.LevelInfo,
Data: versionData,
})
} else {
sentry.AddBreadcrumb(&sentry.Breadcrumb{
Category: "Version Information",
Level: sentry.LevelInfo,
Message: "No Version Information found",
})
}
sentry.CurrentHub().Recover(e)
sentry.Flush(duration)
}