/
middleware.go
108 lines (85 loc) · 2.48 KB
/
middleware.go
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package geoipfix
import (
"fmt"
"net/http"
"os"
"runtime/debug"
"time"
"github.com/go-chi/chi/middleware"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
type middlewareHandler = func(next http.Handler) http.Handler
type recoverMiddleware struct {
debug bool
logger *zap.Logger
}
func newRecoverMiddleware(debug bool, logger *zap.Logger) *recoverMiddleware {
return &recoverMiddleware{
debug: debug,
logger: logger,
}
}
func (m *recoverMiddleware) Handle(it interface{}) {
if m.debug {
fmt.Fprintf(os.Stderr, "Panic: %+v\n", it)
debug.PrintStack()
} else {
m.logger.Error("Error handled")
}
}
func (m *recoverMiddleware) Handler(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer func() {
if rvr := recover(); rvr != nil {
m.Handle(rvr)
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
}
}()
next.ServeHTTP(w, r)
})
}
func newLoggerMiddleware(logger *zap.Logger) func(next http.Handler) http.Handler {
return middleware.RequestLogger(&structuredLogger{logger})
}
type structuredLogger struct {
Logger *zap.Logger
}
func (l *structuredLogger) NewLogEntry(r *http.Request) middleware.LogEntry {
entry := &structuredLoggerEntry{Logger: l.Logger}
fields := []zapcore.Field{zap.String("ts", time.Now().UTC().Format(time.RFC1123))}
if reqID := middleware.GetReqID(r.Context()); reqID != "" {
fields = append(fields, zap.String("req.id", reqID))
}
scheme := "http"
if r.TLS != nil {
scheme = "https"
}
fields = append(fields, []zapcore.Field{
zap.String("http.scheme", scheme),
zap.String("http.proto", r.Proto),
zap.String("http.method", r.Method),
zap.String("remote_addr", r.RemoteAddr),
zap.String("user_agent", r.UserAgent()),
zap.String("uri", fmt.Sprintf("%s://%s%s", scheme, r.Host, r.RequestURI)),
}...)
entry.Logger = l.Logger.With(fields...)
entry.Logger.Info("request started")
return entry
}
type structuredLoggerEntry struct {
Logger *zap.Logger
}
func (l *structuredLoggerEntry) Write(status, bytes int, elapsed time.Duration) {
l.Logger = l.Logger.With(
zap.Int("res.status", status),
zap.Int("res.bytes_length", bytes),
zap.Float64("res.elapsed_ms", float64(elapsed.Nanoseconds())/1000000.0))
l.Logger.Info("request complete")
}
func (l *structuredLoggerEntry) Panic(v interface{}, stack []byte) {
l.Logger = l.Logger.With(
zap.String("stack", string(stack)),
zap.String("panic", fmt.Sprintf("%+v", v)),
)
}