log http call timing

backend/logging/middleware.go

@@ -1,9 +1,10 @@
 package logging
 
 import (
- "fmt"
+ "log"
  "net/http"
  "net/http/httputil"
+ "time"
 )
 
 // RoundTripper implements the http.RoundTripper interface
@@ -16,14 +17,14 @@ func (lrt RoundTripper) RoundTrip(req *http.Request) (res *http.Response, err er
  if err != nil {
  return
  }
- fmt.Printf("%s", dump)
-
+ log.Printf("%s", dump)
+ start := time.Now()
  res, err = lrt.Proxied.RoundTrip(req)
-
+ elapsed := time.Since(start)
  if err != nil {
- fmt.Printf("Error %s %s: %v", req.Method, req.URL.RawQuery, err)
+ log.Printf("Error %s %s took %s: %v", req.Method, req.URL.RawQuery, elapsed, err)
  } else {
- fmt.Printf("Received %v response\n", res.Status)
+ log.Printf("Received %v in %s\n", res.Status, elapsed)
  }
 
  return