306512bf9c
Only the Sentry hook uses the values of the passed context. Therefore, we removed the values from our log statements when we shifted them from an extra `WithField` call to the context. We fix this behavior by introducing a Logrus Hook that copies a fixed set of context values to the logging data.
110 lines
2.7 KiB
Go
110 lines
2.7 KiB
Go
package logging
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"github.com/getsentry/sentry-go"
|
|
"github.com/openHPI/poseidon/pkg/dto"
|
|
"github.com/sirupsen/logrus"
|
|
"net"
|
|
"net/http"
|
|
"os"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
const TimestampFormat = "2006-01-02T15:04:05.000000Z"
|
|
|
|
var log = &logrus.Logger{
|
|
Out: os.Stderr,
|
|
Formatter: &logrus.TextFormatter{
|
|
TimestampFormat: TimestampFormat,
|
|
DisableColors: true,
|
|
FullTimestamp: true,
|
|
},
|
|
Hooks: make(logrus.LevelHooks),
|
|
Level: logrus.InfoLevel,
|
|
}
|
|
|
|
const GracefulSentryShutdown = 5 * time.Second
|
|
|
|
func InitializeLogging(logLevel string, formatter dto.Formatter) {
|
|
level, err := logrus.ParseLevel(logLevel)
|
|
if err != nil {
|
|
log.WithError(err).Fatal("Error parsing loglevel")
|
|
return
|
|
}
|
|
log.SetLevel(level)
|
|
if formatter == dto.FormatterJSON {
|
|
log.Formatter = &logrus.JSONFormatter{
|
|
TimestampFormat: TimestampFormat,
|
|
}
|
|
}
|
|
log.AddHook(&ContextHook{})
|
|
log.AddHook(&SentryHook{})
|
|
log.ExitFunc = func(i int) {
|
|
sentry.Flush(GracefulSentryShutdown)
|
|
os.Exit(i)
|
|
}
|
|
}
|
|
|
|
func GetLogger(pkg string) *logrus.Entry {
|
|
return log.WithField("package", pkg)
|
|
}
|
|
|
|
// ResponseWriter wraps the default http.ResponseWriter and catches the status code
|
|
// that is written.
|
|
type ResponseWriter struct {
|
|
http.ResponseWriter
|
|
StatusCode int
|
|
}
|
|
|
|
func NewLoggingResponseWriter(w http.ResponseWriter) *ResponseWriter {
|
|
return &ResponseWriter{w, http.StatusOK}
|
|
}
|
|
|
|
func (writer *ResponseWriter) WriteHeader(code int) {
|
|
writer.StatusCode = code
|
|
writer.ResponseWriter.WriteHeader(code)
|
|
}
|
|
|
|
func (writer *ResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
|
conn, rw, err := writer.ResponseWriter.(http.Hijacker).Hijack()
|
|
if err != nil {
|
|
return conn, nil, fmt.Errorf("hijacking connection failed: %w", err)
|
|
}
|
|
return conn, rw, nil
|
|
}
|
|
|
|
// HTTPLoggingMiddleware returns a http.Handler that logs different information about every request.
|
|
func HTTPLoggingMiddleware(next http.Handler) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
start := time.Now().UTC()
|
|
path := RemoveNewlineSymbol(r.URL.Path)
|
|
|
|
lrw := NewLoggingResponseWriter(w)
|
|
next.ServeHTTP(lrw, r)
|
|
|
|
latency := time.Now().UTC().Sub(start)
|
|
logEntry := log.WithContext(r.Context()).WithFields(logrus.Fields{
|
|
"code": lrw.StatusCode,
|
|
"method": r.Method,
|
|
"path": path,
|
|
"duration": latency,
|
|
"user_agent": RemoveNewlineSymbol(r.UserAgent()),
|
|
})
|
|
if lrw.StatusCode >= http.StatusInternalServerError {
|
|
logEntry.Error("Failing " + path)
|
|
} else {
|
|
logEntry.Debug()
|
|
}
|
|
})
|
|
}
|
|
|
|
// RemoveNewlineSymbol GOOD: remove newlines from user controlled input before logging.
|
|
func RemoveNewlineSymbol(data string) string {
|
|
data = strings.ReplaceAll(data, "\r", "")
|
|
data = strings.ReplaceAll(data, "\n", "")
|
|
return data
|
|
}
|