feat: add XSLT packer

vul/vul-webapp/src/main/java/XSLTServlet.java

@@ -0,0 +1,29 @@
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
+import java.io.IOException;
+import java.io.StringReader;
+
+/**
+ * @author ReaJason
+ * @since 2026/8/30
+ */
+public class XSLTServlet extends HttpServlet {
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        String data = req.getParameter("data");
+        try {
+            TransformerFactory factory = TransformerFactory.newInstance();
+            Transformer transformer = factory.newTransformer(new StreamSource(new StringReader(data)));
+            transformer.transform(new StreamSource(new StringReader("<?xml version=\"1.0\" encoding=\"UTF-8\"?><root/>")),
+                    new StreamResult(resp.getWriter()));
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

vul/vul-webapp/src/main/webapp/WEB-INF/web.xml

@@ -33,6 +33,15 @@
         <url-pattern>/js</url-pattern>
     </servlet-mapping>
 
+    <servlet>
+        <servlet-name>xslt</servlet-name>
+        <servlet-class>XSLTServlet</servlet-class>
+    </servlet>
+    <servlet-mapping>
+        <servlet-name>xslt</servlet-name>
+        <url-pattern>/xslt</url-pattern>
+    </servlet-mapping>
+
     <servlet>
         <servlet-name>java-deserialize</servlet-name>
         <servlet-class>JavaReadObjServlet</servlet-class>