refactor

ngin/internal/context/params.go

@@ -0,0 +1,21 @@
+package context
+
+import (
+	"context"
+	"net/http"
+)
+
+const pathVars = "pathVars"
+
+func Vars(r *http.Request) map[string]string {
+	vars, ok := r.Context().Value(pathVars).(map[string]string)
+	if ok {
+		return vars
+	}
+
+	return nil
+}
+
+func WithPathVars(r *http.Request, params map[string]string) *http.Request {
+	return r.WithContext(context.WithValue(r.Context(), pathVars, params))
+}