131 lines
3.0 KiB
Go
131 lines
3.0 KiB
Go
|
package middleware
|
||
|
|
||
|
import (
|
||
|
"io"
|
||
|
"log/slog"
|
||
|
"net/http"
|
||
|
"os"
|
||
|
"strings"
|
||
|
"sync/atomic"
|
||
|
"time"
|
||
|
)
|
||
|
|
||
|
type (
|
||
|
LogFmtConfig struct {
|
||
|
// Skipper defines a function to skip middleware.
|
||
|
Skipper Skipper
|
||
|
|
||
|
// Output is a writer where logs in JSON format are written.
|
||
|
// Optional. Default value os.Stdout.
|
||
|
Output io.Writer
|
||
|
}
|
||
|
|
||
|
logFmtResponse struct {
|
||
|
http.ResponseWriter
|
||
|
error error
|
||
|
start time.Time
|
||
|
end time.Time
|
||
|
statusCode int
|
||
|
responseLength int
|
||
|
id uint64
|
||
|
}
|
||
|
)
|
||
|
|
||
|
//nolint:gochecknoglobals // default configuration
|
||
|
var DefaultLogFmtConfig = LogFmtConfig{
|
||
|
Skipper: DefaultSkipper,
|
||
|
Output: os.Stdout,
|
||
|
}
|
||
|
|
||
|
//nolint:gochecknoglobals
|
||
|
var globalConnID uint64
|
||
|
|
||
|
func LogFmt() Interceptor {
|
||
|
c := DefaultLogFmtConfig
|
||
|
|
||
|
return LogFmtWithConfig(c)
|
||
|
}
|
||
|
|
||
|
func LogFmtWithConfig(config LogFmtConfig) Interceptor {
|
||
|
if config.Skipper == nil {
|
||
|
config.Skipper = DefaultLogFmtConfig.Skipper
|
||
|
}
|
||
|
|
||
|
if config.Output == nil {
|
||
|
config.Output = DefaultLogFmtConfig.Output
|
||
|
}
|
||
|
|
||
|
encoder := slog.New(slog.NewTextHandler(config.Output, nil))
|
||
|
|
||
|
return func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
|
||
|
tx := &logFmtResponse{
|
||
|
id: nextConnID(),
|
||
|
responseLength: 0,
|
||
|
ResponseWriter: w,
|
||
|
start: time.Now().UTC(),
|
||
|
statusCode: 0,
|
||
|
}
|
||
|
|
||
|
next(tx, r)
|
||
|
|
||
|
tx.end = time.Now().UTC()
|
||
|
payload := []any{
|
||
|
slog.Int64("bytes_in", r.ContentLength),
|
||
|
slog.Int("bytes_out", tx.responseLength),
|
||
|
slog.Any("error", tx.error),
|
||
|
slog.String("host", r.Host),
|
||
|
slog.Uint64("id", tx.id),
|
||
|
slog.Int64("latency", tx.end.Sub(tx.start).Nanoseconds()),
|
||
|
slog.String("latency_human", tx.end.Sub(tx.start).String()),
|
||
|
slog.String("method", r.Method),
|
||
|
slog.String("path", r.URL.Path),
|
||
|
slog.String("protocol", r.Proto),
|
||
|
slog.String("referer", r.Referer()),
|
||
|
slog.String("remote_ip", r.RemoteAddr),
|
||
|
slog.Int("status", tx.statusCode),
|
||
|
slog.String("time_rfc3339", tx.start.Format(time.RFC3339)),
|
||
|
slog.String("time_rfc3339_nano", tx.start.Format(time.RFC3339Nano)),
|
||
|
slog.Int64("time_unix", tx.start.Unix()),
|
||
|
slog.Int64("time_unix_nano", tx.start.UnixNano()),
|
||
|
slog.String("uri", r.RequestURI),
|
||
|
slog.String("user_agent", r.UserAgent()),
|
||
|
}
|
||
|
|
||
|
for name, src := range map[string]map[string][]string{
|
||
|
"form": r.PostForm,
|
||
|
"header": r.Header,
|
||
|
"query": r.URL.Query(),
|
||
|
} {
|
||
|
values := make([]any, 0)
|
||
|
|
||
|
for k, v := range src {
|
||
|
values = append(values, slog.String(strings.ReplaceAll(strings.ToLower(k), " ", "_"),
|
||
|
strings.Join(v, " ")))
|
||
|
}
|
||
|
|
||
|
payload = append(payload, slog.Group(name, values...))
|
||
|
}
|
||
|
|
||
|
encoder.Log(r.Context(), slog.LevelInfo, "" /* msg */, payload...)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func (r *logFmtResponse) WriteHeader(status int) {
|
||
|
r.statusCode = status
|
||
|
|
||
|
r.ResponseWriter.WriteHeader(status)
|
||
|
}
|
||
|
|
||
|
func (r *logFmtResponse) Write(src []byte) (int, error) {
|
||
|
var length int
|
||
|
|
||
|
length, r.error = r.ResponseWriter.Write(src)
|
||
|
r.responseLength += length
|
||
|
|
||
|
return length, r.error
|
||
|
}
|
||
|
|
||
|
func nextConnID() uint64 {
|
||
|
return atomic.AddUint64(&globalConnID, 1)
|
||
|
}
|