i2ptunnel: Initial SSL setup wizard

Includes Jetty XML configuration parser
Work in progress, doesn't work, not linked from anywhere

apps/jetty/java/src/net/i2p/jetty/JettyXmlConfigurationParser.java

@@ -0,0 +1,134 @@
+package net.i2p.jetty;
+
+//
+//  ========================================================================
+//  Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd.
+//  ------------------------------------------------------------------------
+//  All rights reserved. This program and the accompanying materials
+//  are made available under the terms of the Eclipse Public License v1.0
+//  and Apache License v2.0 which accompanies this distribution.
+//
+//      The Eclipse Public License is available at
+//      http://www.eclipse.org/legal/epl-v10.html
+//
+//      The Apache License v2.0 is available at
+//      http://www.opensource.org/licenses/apache2.0.php
+//
+//  You may elect to redistribute this code under either of these licenses.
+//  ========================================================================
+//
+
+import java.io.IOException;
+import java.io.File;
+import java.net.URL;
+import java.util.Locale;
+
+import org.eclipse.jetty.util.Loader;
+import org.eclipse.jetty.xml.XmlConfiguration;
+import org.eclipse.jetty.xml.XmlParser;
+import org.eclipse.jetty.xml.XmlParser.Node;
+import org.xml.sax.SAXException;
+
+/**
+ *  Parses a Jetty XML configuration file.
+ *  Copied from Jetty XmlConfiguration.java, where the parser is private.
+ *
+ *  @since 0.9.35
+ */
+public class JettyXmlConfigurationParser
+{
+    private static XmlParser initParser()
+    {
+        XmlParser parser = new XmlParser();
+        URL config60 = Loader.getResource(XmlConfiguration.class, "org/eclipse/jetty/xml/configure_6_0.dtd");
+        URL config76 = Loader.getResource(XmlConfiguration.class,"org/eclipse/jetty/xml/configure_7_6.dtd");
+        URL config90 = Loader.getResource(XmlConfiguration.class,"org/eclipse/jetty/xml/configure_9_0.dtd");
+        parser.redirectEntity("configure.dtd",config90);
+        parser.redirectEntity("configure_1_0.dtd",config60);
+        parser.redirectEntity("configure_1_1.dtd",config60);
+        parser.redirectEntity("configure_1_2.dtd",config60);
+        parser.redirectEntity("configure_1_3.dtd",config60);
+        parser.redirectEntity("configure_6_0.dtd",config60);
+        parser.redirectEntity("configure_7_6.dtd",config76);
+        parser.redirectEntity("configure_9_0.dtd",config90);
+
+        parser.redirectEntity("http://jetty.mortbay.org/configure.dtd",config90);
+        parser.redirectEntity("http://jetty.eclipse.org/configure.dtd",config90);
+        parser.redirectEntity("http://www.eclipse.org/jetty/configure.dtd",config90);
+
+        parser.redirectEntity("-//Mort Bay Consulting//DTD Configure//EN",config90);
+        parser.redirectEntity("-//Jetty//Configure//EN",config90);
+
+        return parser;
+    }
+
+    /**
+     * Reads and parses the XML configuration file.
+     *
+     * @param f an XML configuration file
+     * @throws IOException if the configuration could not be read
+     * @throws SAXException if the configuration could not be parsed
+     */
+    public static XmlParser.Node parse(File f) throws SAXException, IOException {
+        // we don't expect to need this very often,
+        // so just make a new parser every time
+        return initParser().parse(f);
+    }
+
+    /**
+     *  Recursively go through the entire tree starting at node.
+     *  Return the value for the first node with the name set,
+     *  e.g. [Set name="name"]value[/Set]
+     *  @param name case insensitive
+     */
+    public static String getValue(Node node, String name) {
+        String nameLC = name.toLowerCase(Locale.US);
+        for (Object o : node) {
+            if (!(o instanceof Node))
+                continue;
+            Node n = (Node) o;
+            String tag = n.getTag();
+            if (tag != null && "set".equals(tag.toLowerCase(Locale.US))) {
+                String aname = n.getAttribute("name");
+                if (aname != null && aname.toLowerCase(Locale.US).equals(nameLC))
+                    return n.toString(false);
+            } else {
+                String rv = getValue(n, name);
+                if (rv != null)
+                    return rv;
+            }
+        }
+        return null;
+    }
+
+    /**
+     *  Recursively go through the entire tree starting at node.
+     *  Return the value for the first node with the name set,
+     *  e.g. [Set name="name"]value[/Set]
+     *  @param name case insensitive
+     *  @return success
+     */
+    public static boolean setValue(Node node, String name, String value) {
+        String nameLC = name.toLowerCase(Locale.US);
+        for (Object o : node) {
+            if (!(o instanceof Node))
+                continue;
+            Node n = (Node) o;
+            String tag = n.getTag();
+            if (tag != null && "set".equals(tag.toLowerCase(Locale.US))) {
+                String aname = n.getAttribute("name");
+                if (aname != null && aname.toLowerCase(Locale.US).equals(nameLC)) {
+                    // Node doesn't support set() or remove() but it does have clear()
+                    n.clear();
+                    n.add(value);
+                    return true;
+                }
+            } else {
+                boolean rv = setValue(n, name, value);
+                if (rv)
+                    return rv;
+            }
+        }
+        return false;
+    }
+}