undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.

test/jdk/com/sun/net/httpserver/FileServerHandler.java

@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2005, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.io.*;
+import java.net.*;
+
+import com.sun.net.httpserver.*;
+import static com.sun.net.httpserver.HttpExchange.RSPBODY_EMPTY;
+import static com.sun.net.httpserver.HttpExchange.RSPBODY_CHUNKED;
+
+/**
+ * Implements a basic static content HTTP file server handler
+ * which understands text/html, text/plain content types
+ *
+ * Must be given an abs pathname to the document root.
+ * Directory listings together with text + html files
+ * can be served.
+ *
+ */
+public class FileServerHandler implements HttpHandler {
+
+    String docroot;
+
+    public FileServerHandler (String docroot) {
+        this.docroot = docroot;
+    }
+
+    public void handle (HttpExchange t)
+        throws IOException
+    {
+        InputStream is = t.getRequestBody();
+        Headers map = t.getRequestHeaders();
+        Headers rmap = t.getResponseHeaders();
+        URI uri = t.getRequestURI();
+        String path = uri.getPath();
+
+        int x = 0;
+        while (is.read () != -1) x++;
+        is.close();
+        File f = new File (docroot, path);
+        if (!f.exists()) {
+            notfound (t, path);
+            return;
+        }
+        String fixedrequest = map.getFirst ("XFixed");
+
+        String method = t.getRequestMethod();
+        if (method.equals ("HEAD")) {
+            rmap.set ("Content-Length", Long.toString (f.length()));
+            t.sendResponseHeaders (200, RSPBODY_EMPTY);
+            t.close();
+        } else if (!method.equals("GET")) {
+            t.sendResponseHeaders (405, RSPBODY_EMPTY);
+            t.close();
+            return;
+        }
+
+        if (path.endsWith (".html") || path.endsWith (".htm")) {
+            rmap.set ("Content-Type", "text/html");
+        } else {
+            rmap.set ("Content-Type", "text/plain");
+        }
+        if (f.isDirectory()) {
+            if (!path.endsWith ("/")) {
+                moved (t);
+                return;
+            }
+            rmap.set ("Content-Type", "text/html");
+            t.sendResponseHeaders (200, RSPBODY_CHUNKED);
+            String[] list = f.list();
+            try (final OutputStream os = t.getResponseBody();
+                 final PrintStream p = new PrintStream (os)) {
+                p.println("<h2>Directory listing for: " + path + "</h2>");
+                p.println("<ul>");
+                for (int i = 0; i < list.length; i++) {
+                    p.println("<li><a href=\"" + list[i] + "\">" + list[i] + "</a></li>");
+                }
+                p.println("</ul><p><hr>");
+                p.flush();
+            }
+        } else {
+            int clen;
+            if (fixedrequest != null) {
+                clen = (int) f.length();
+            } else {
+                clen = 0;
+            }
+            t.sendResponseHeaders (200, clen);
+            int count = 0;
+            try (final OutputStream os = t.getResponseBody();
+                 final FileInputStream fis = new FileInputStream (f)) {
+                byte[] buf = new byte [16 * 1024];
+                int len;
+                while ((len=fis.read (buf)) != -1) {
+                    os.write (buf, 0, len);
+                    count += len;
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    void moved (HttpExchange t) throws IOException {
+        Headers req = t.getRequestHeaders();
+        Headers map = t.getResponseHeaders();
+        URI uri = t.getRequestURI();
+        String host = req.getFirst ("Host");
+        String location = "http://"+host+uri.getPath() + "/";
+        map.set ("Content-Type", "text/html");
+        map.set ("Location", location);
+        t.sendResponseHeaders (301, RSPBODY_EMPTY);
+        t.close();
+    }
+
+    void notfound (HttpExchange t, String p) throws IOException {
+        t.getResponseHeaders().set ("Content-Type", "text/html");
+        t.sendResponseHeaders (404, RSPBODY_CHUNKED);
+        OutputStream os = t.getResponseBody();
+        String s = "<h2>File not found</h2>";
+        s = s + p + "<p>";
+        os.write (s.getBytes());
+        os.close();
+        t.close();
+    }
+}