add middlewares

pkgs/middleware/httplog/log.go

@@ -0,0 +1,75 @@
+package httplog
+
+import (
+	"context"
+	"log/slog"
+	"net/http"
+	"time"
+
+	"git.jeffthecoder.xyz/guochao/cache-proxy/pkgs/middleware/handlerlog"
+)
+
+type ctxKey int
+
+const (
+	loggerKey ctxKey = iota
+)
+
+type Config struct {
+	LogStart      bool
+	LogStartLevel slog.Level
+
+	LogFinish      bool
+	LogFinishLevel slog.Level
+}
+
+type responseRecorder struct {
+	http.ResponseWriter
+	StatusCode int
+}
+
+func (recorder *responseRecorder) WriteHeader(statusCode int) {
+	recorder.StatusCode = statusCode
+
+	recorder.ResponseWriter.WriteHeader(statusCode)
+}
+
+func Log(config Config) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			args := []any{
+				"remote_addr", r.RemoteAddr,
+				"host", r.Host,
+				"path", r.URL.Path,
+			}
+
+			if pattern, handlerFound := handlerlog.Pattern(r); handlerFound {
+				args = append(args, "handler", pattern)
+			}
+
+			startTime := time.Now()
+			if config.LogStart {
+				slog.With(append(args, "time", startTime)...).Log(r.Context(), config.LogStartLevel, "request start")
+			}
+			recorder := &responseRecorder{ResponseWriter: w, StatusCode: 200}
+			next.ServeHTTP(recorder, r.WithContext(context.WithValue(r.Context(), loggerKey, slog.With(args...))))
+			if config.LogFinish {
+				finishTime := time.Now()
+				slog.With(append(args, "time", finishTime, "duration", finishTime.Sub(startTime), "status", recorder.StatusCode)...).Log(r.Context(), config.LogFinishLevel, "request finished")
+			}
+		})
+	}
+}
+
+func Logger(r *http.Request) *slog.Logger {
+	if logger, ok := r.Context().Value(loggerKey).(*slog.Logger); ok {
+		return logger.With("time", time.Now())
+	}
+
+	return slog.With(
+		"remote_addr", r.RemoteAddr,
+		"host", r.Host,
+		"path", r.URL.Path,
+		"time", time.Now(),
+	)
+}