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Golang apache logging
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type ApacheLogRecord struct { | |
http.ResponseWriter | |
ip string | |
time time.Time | |
method, uri, protocol string | |
status int | |
responseBytes int64 | |
elapsedTime time.Duration | |
} | |
func (r *ApacheLogRecord) Log(out io.Writer) { | |
timeFormatted := r.time.Format("02/Jan/2006 03:04:05") | |
requestLine := fmt.Sprintf("%s %s %s", r.method, r.uri, r.protocol) | |
fmt.Fprintf(out, ApacheFormatPattern, r.ip, timeFormatted, requestLine, r.status, r.responseBytes, | |
r.elapsedTime.Seconds()) | |
} | |
func (r *ApacheLogRecord) Write(p []byte) (int, error) { | |
written, err := r.ResponseWriter.Write(p) | |
r.responseBytes += int64(written) | |
return written, err | |
} | |
func (r *ApacheLogRecord) WriteHeader(status int) { | |
r.status = status | |
r.ResponseWriter.WriteHeader(status) | |
} | |
type ApacheLoggingHandler struct { | |
handler http.Handler | |
out io.Writer | |
} | |
func NewApacheLoggingHandler(handler http.Handler, out io.Writer) http.Handler { | |
return &ApacheLoggingHandler{ | |
handler: handler, | |
out: out, | |
} | |
} | |
func (h *ApacheLoggingHandler) ServeHTTP(rw http.ResponseWriter, r *http.Request) { | |
clientIP := r.RemoteAddr | |
if colon := strings.LastIndex(clientIP, ":"); colon != -1 { | |
clientIP = clientIP[:colon] | |
} | |
record := &ApacheLogRecord{ | |
ResponseWriter: rw, | |
ip: clientIP, | |
time: time.Time{}, | |
method: r.Method, | |
uri: r.RequestURI, | |
protocol: r.Proto, | |
status: http.StatusOK, | |
elapsedTime: time.Duration(0), | |
} | |
startTime := time.Now() | |
h.handler.ServeHTTP(record, r) | |
finishTime := time.Now() | |
record.time = finishTime.UTC() | |
record.elapsedTime = finishTime.Sub(startTime) | |
record.Log(h.out) | |
} |
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func main() { | |
mux := http.DefaultServeMux | |
mux.HandleFunc("/", indexHandler) | |
loggingHandler := NewApacheLoggingHandler(mux, os.Stderr) | |
server := &http.Server{ | |
Addr: fmt.Sprintf(":%s", 2345), | |
Handler: loggingHandler, | |
} | |
server.ListenAndServe() | |
} |
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