tag içeriğinde '<', '>' ve '&' karakterlerini özel yazdır

üretim.lisp

@@ -23,6 +23,16 @@
   (write-char #\Newline stream)
   (setf *satır-başı* t))
 
+;;;; https://stackoverflow.com/questions/7381974/which-characters-need-to-be-escaped-in-html
+;;; TODO geliştirme mümkün... ama şimdilik yeter (#\" """) (#\' "'")
+(defun kaçışlı-içerik-yazdır (metin stream)
+  (loop :for karakter :across metin
+        :do (case karakter
+              (#\< (write-string "&lt;" stream))
+              (#\> (write-string "&gt;" stream))
+              (#\& (write-string "&amp;" stream))
+              (t (write-char karakter stream)))))
+
 (defmethod node->html :before ((node node) &optional (stream *standard-output*))
   (unless (not *satır-başı*)
     (loop :for i :from 0 :below *indent*
@@ -39,7 +49,7 @@
 
 (defmethod node->html ((node node) &optional (stream *standard-output*))
   (if (null (children node))
-      (format stream "~a" (value node))
+      (kaçışlı-içerik-yazdır (value node) stream)
       (let ((*indent* (+ *indent* *indent-increment*)))
         (loop :for child :in (children node)
               :do (node->html child stream)))))