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package middleware
import (
"bytes"
"log"
"net/http"
"time"
)
type LoggingResponseWriter struct {
http.ResponseWriter
statusCode int
responseBody *bytes.Buffer
}
func (w *LoggingResponseWriter) WriteHeader(code int) {
w.statusCode = code
w.ResponseWriter.WriteHeader(code)
}
func (w *LoggingResponseWriter) Write(data []byte) (int, error) {
w.responseBody.Write(data)
return w.ResponseWriter.Write(data)
}
func LoggingMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
start := time.Now()
loggingWriter := &LoggingResponseWriter{
ResponseWriter: w,
statusCode: http.StatusOK,
responseBody: &bytes.Buffer{},
}
next.ServeHTTP(loggingWriter, r)
log.Printf(
"Client IP: %s | Method: %s | Path: %s | Status: %d | Duration: %v",
r.RemoteAddr,
r.Method,
r.URL.Path,
loggingWriter.statusCode,
time.Since(start),
)
if loggingWriter.responseBody.Len() > 0 {
log.Print(loggingWriter.responseBody.String())
}
})
}
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