/
logging.go
53 lines (45 loc) · 1000 Bytes
/
logging.go
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package main
import (
"log"
"net/http"
"os"
"time"
)
var logger = log.New(os.Stdout, "server: ", log.LstdFlags|log.Lmicroseconds)
type loggingWriter struct {
http.ResponseWriter
status int
length int
}
func (w *loggingWriter) WriteHeader(status int) {
w.status = status
w.ResponseWriter.WriteHeader(status)
}
func (w *loggingWriter) Write(b []byte) (int, error) {
if w.status == 0 {
w.status = 200
}
bytesWritten, err := w.ResponseWriter.Write(b)
if err == nil {
w.length += bytesWritten
}
return bytesWritten, err
}
func newLoggingMux() http.HandlerFunc {
return func(w http.ResponseWriter, req *http.Request) {
start := time.Now()
writer := loggingWriter{w, 0, 0}
http.DefaultServeMux.ServeHTTP(&writer, req)
end := time.Now()
duration := end.Sub(start)
logger.Printf("%s %s %d \"%s\" %s %.2fms %d",
req.Method,
req.URL,
writer.status,
req.UserAgent(),
req.Referer(),
float64(duration)/float64(time.Millisecond),
writer.length,
)
}
}