"github.com/gorilla/mux"
"log"
"net/http"
+ "strings"
+ "time"
)
+// LoggingResponseWriter has anonymous fields ResponseWriter and ResponseBody
type LoggingResponseWriter struct {
Status int
Length int
http.ResponseWriter
+ ResponseBody string
+ sentHdr time.Time
}
+// WriteHeader writes header to ResponseWriter
func (loggingWriter *LoggingResponseWriter) WriteHeader(code int) {
+ if loggingWriter.sentHdr == zeroTime {
+ loggingWriter.sentHdr = time.Now()
+ }
loggingWriter.Status = code
loggingWriter.ResponseWriter.WriteHeader(code)
}
+var zeroTime time.Time
+
func (loggingWriter *LoggingResponseWriter) Write(data []byte) (int, error) {
+ if loggingWriter.Length == 0 && len(data) > 0 && loggingWriter.sentHdr == zeroTime {
+ loggingWriter.sentHdr = time.Now()
+ }
loggingWriter.Length += len(data)
+ if loggingWriter.Status >= 400 {
+ loggingWriter.ResponseBody += string(data)
+ }
return loggingWriter.ResponseWriter.Write(data)
}
+// LoggingRESTRouter is used to add logging capabilities to mux.Router
type LoggingRESTRouter struct {
router *mux.Router
}
+// MakeLoggingRESTRouter initializes LoggingRESTRouter
func MakeLoggingRESTRouter() *LoggingRESTRouter {
router := MakeRESTRouter()
return (&LoggingRESTRouter{router})
}
func (loggingRouter *LoggingRESTRouter) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
- loggingWriter := LoggingResponseWriter{200, 0, resp}
+ t0 := time.Now()
+ loggingWriter := LoggingResponseWriter{http.StatusOK, 0, resp, "", zeroTime}
loggingRouter.router.ServeHTTP(&loggingWriter, req)
- log.Printf("[%s] %s %s %d %d", req.RemoteAddr, req.Method, req.URL.Path[1:], loggingWriter.Status, loggingWriter.Length)
+ statusText := http.StatusText(loggingWriter.Status)
+ if loggingWriter.Status >= 400 {
+ statusText = strings.Replace(loggingWriter.ResponseBody, "\n", "", -1)
+ }
+ now := time.Now()
+ tTotal := now.Sub(t0)
+ tLatency := loggingWriter.sentHdr.Sub(t0)
+ tResponse := now.Sub(loggingWriter.sentHdr)
+ log.Printf("[%s] %s %s %d %.6fs %.6fs %.6fs %d %d \"%s\"", req.RemoteAddr, req.Method, req.URL.Path[1:], req.ContentLength, tTotal.Seconds(), tLatency.Seconds(), tResponse.Seconds(), loggingWriter.Status, loggingWriter.Length, statusText)
+
}