fix: security & privacy (rate limiter fix, csrf session cookie, logout on server, drafts stale token passw, login timing, password over 72b, JWT_SECRET complexity, SMTP TLS, CSV export neutralised, fonts bundled, upload metadata, hourly cleanup job, privacy.md report)

api/middleware/crossOrigin.go

@@ -0,0 +1,36 @@
+package middleware
+
+import (
+	"RenewCMS/api/pkg/apperr"
+	"net/http"
+	"net/url"
+)
+
+func CrossOriginProtection(publicURL string) func(http.Handler) http.Handler {
+	protection := http.NewCrossOriginProtection()
+	if origin, ok := originOf(publicURL); ok {
+		_ = protection.AddTrustedOrigin(origin)
+	}
+	protection.SetDenyHandler(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		http.Error(w, apperr.CrossOriginErrorMessage, http.StatusForbidden)
+	}))
+
+	return func(next http.Handler) http.Handler {
+		protected := protection.Handler(next)
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if r.Header.Get("Authorization") != "" {
+				next.ServeHTTP(w, r)
+				return
+			}
+			protected.ServeHTTP(w, r)
+		})
+	}
+}
+
+func originOf(rawURL string) (string, bool) {
+	parsed, err := url.Parse(rawURL)
+	if err != nil || parsed.Scheme == "" || parsed.Host == "" {
+		return "", false
+	}
+	return parsed.Scheme + "://" + parsed.Host, true
+}