129 lines
2.6 KiB
Go
129 lines
2.6 KiB
Go
package middleware
|
|
|
|
import (
|
|
"io"
|
|
"net/http"
|
|
"os"
|
|
"strings"
|
|
"sync/atomic"
|
|
"time"
|
|
|
|
"github.com/go-logfmt/logfmt"
|
|
)
|
|
|
|
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
|
|
|
|
// TODO(toby3d): allow select some tags
|
|
}
|
|
|
|
logFmtResponse struct {
|
|
http.ResponseWriter
|
|
error error
|
|
start 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 := logfmt.NewEncoder(config.Output)
|
|
|
|
return func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
|
|
rw := &logFmtResponse{
|
|
id: nextConnID(),
|
|
responseLength: 0,
|
|
ResponseWriter: w,
|
|
start: time.Now().UTC(),
|
|
statusCode: 0,
|
|
}
|
|
|
|
next(rw, r)
|
|
|
|
end := time.Now().UTC()
|
|
|
|
encoder.EncodeKeyvals(
|
|
"bytes_in", r.ContentLength,
|
|
"bytes_out", rw.responseLength,
|
|
"error", rw.error,
|
|
"host", r.Host,
|
|
"id", rw.id,
|
|
"latency", end.Sub(rw.start).Nanoseconds(),
|
|
"latency_human", end.Sub(rw.start).String(),
|
|
"method", r.Method,
|
|
"path", r.URL.Path,
|
|
"protocol", r.Proto,
|
|
"referer", r.Referer(),
|
|
"remote_ip", r.RemoteAddr,
|
|
"status", rw.statusCode,
|
|
"time_rfc3339", rw.start.Format(time.RFC3339),
|
|
"time_rfc3339_nano", rw.start.Format(time.RFC3339Nano),
|
|
"time_unix", rw.start.Unix(),
|
|
"time_unix_nano", rw.start.UnixNano(),
|
|
"uri", r.RequestURI,
|
|
"user_agent", r.UserAgent(),
|
|
)
|
|
|
|
for name, src := range map[string]map[string][]string{
|
|
"form": r.PostForm,
|
|
"header": r.Header,
|
|
"query": r.URL.Query(),
|
|
} {
|
|
for k, v := range src {
|
|
encoder.EncodeKeyval(name+"_"+strings.ReplaceAll(strings.ToLower(k), "-", "_"), v)
|
|
}
|
|
}
|
|
|
|
encoder.EndRecord()
|
|
}
|
|
}
|
|
|
|
func (r *logFmtResponse) WriteHeader(status int) {
|
|
r.statusCode = status
|
|
|
|
r.ResponseWriter.WriteHeader(status)
|
|
}
|
|
|
|
func (r *logFmtResponse) Write(src []byte) (int, error) {
|
|
var l int
|
|
|
|
l, r.error = r.ResponseWriter.Write(src)
|
|
r.responseLength += l
|
|
|
|
return l, r.error
|
|
}
|
|
|
|
func nextConnID() uint64 {
|
|
return atomic.AddUint64(&globalConnID, 1)
|
|
}
|