1 files changed, 56 insertions, 0 deletions
diff --git a/server/middleware/log.go b/server/middleware/log.go
new file mode 100644
index 0000000..a872daa
--- /dev/null
+++ b/server/middleware/log.go
@@ -0,0 +1,56 @@
+package middleware
+
+import (
+	"bytes"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+	"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(b []byte) (int, error) {
+	w.responseBody.Write(b)
+	return w.ResponseWriter.Write(b)
+}
+
+func (w *LoggingResponseWriter) Flush() {
+	if f, ok := w.ResponseWriter.(http.Flusher); ok {
+		f.Flush()
+	}
+}
+
+func Log(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+
+		rw := &LoggingResponseWriter{
+			ResponseWriter: w,
+			statusCode:     http.StatusOK,
+			responseBody:   &bytes.Buffer{},
+		}
+
+		jsonHandler := slog.NewJSONHandler(os.Stderr, nil)
+		myslog := slog.New(jsonHandler)
+		next.ServeHTTP(rw, r)
+
+		if rw.statusCode >= 400 {
+			myslog.Error("Request", "IP", r.RemoteAddr, "Method", r.Method, "Path", r.URL.Path, "Status",
+				rw.statusCode, "Duration", fmt.Sprint(time.Since(start)), "Response", rw.responseBody.String())
+		} else {
+			myslog.Info("Request", "IP", r.RemoteAddr, "Method", r.Method, "Path", r.URL.Path, "Status",
+				rw.statusCode, "Duration", fmt.Sprint(time.Since(start)))
+		}
+	})
+}