pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/client/DefaultUserTokenHandler.java

@@ -0,0 +1,101 @@
+/*
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+package ch.boye.httpclientandroidlib.impl.client;
+
+import java.security.Principal;
+
+import javax.net.ssl.SSLSession;
+
+import ch.boye.httpclientandroidlib.HttpConnection;
+import ch.boye.httpclientandroidlib.annotation.Immutable;
+import ch.boye.httpclientandroidlib.auth.AuthScheme;
+import ch.boye.httpclientandroidlib.auth.AuthState;
+import ch.boye.httpclientandroidlib.auth.Credentials;
+import ch.boye.httpclientandroidlib.client.UserTokenHandler;
+import ch.boye.httpclientandroidlib.client.protocol.HttpClientContext;
+import ch.boye.httpclientandroidlib.conn.ManagedHttpClientConnection;
+import ch.boye.httpclientandroidlib.protocol.HttpContext;
+
+/**
+ * Default implementation of {@link UserTokenHandler}. This class will use
+ * an instance of {@link Principal} as a state object for HTTP connections,
+ * if it can be obtained from the given execution context. This helps ensure
+ * persistent connections created with a particular user identity within
+ * a particular security context can be reused by the same user only.
+ * <p>
+ * DefaultUserTokenHandler will use the user principle of connection
+ * based authentication schemes such as NTLM or that of the SSL session
+ * with the client authentication turned on. If both are unavailable,
+ * <code>null</code> token will be returned.
+ *
+ * @since 4.0
+ */
+@Immutable
+public class DefaultUserTokenHandler implements UserTokenHandler {
+
+    public static final DefaultUserTokenHandler INSTANCE = new DefaultUserTokenHandler();
+
+    public Object getUserToken(final HttpContext context) {
+
+        final HttpClientContext clientContext = HttpClientContext.adapt(context);
+
+        Principal userPrincipal = null;
+
+        final AuthState targetAuthState = clientContext.getTargetAuthState();
+        if (targetAuthState != null) {
+            userPrincipal = getAuthPrincipal(targetAuthState);
+            if (userPrincipal == null) {
+                final AuthState proxyAuthState = clientContext.getProxyAuthState();
+                userPrincipal = getAuthPrincipal(proxyAuthState);
+            }
+        }
+
+        if (userPrincipal == null) {
+            final HttpConnection conn = clientContext.getConnection();
+            if (conn.isOpen() && conn instanceof ManagedHttpClientConnection) {
+                final SSLSession sslsession = ((ManagedHttpClientConnection) conn).getSSLSession();
+                if (sslsession != null) {
+                    userPrincipal = sslsession.getLocalPrincipal();
+                }
+            }
+        }
+
+        return userPrincipal;
+    }
+
+    private static Principal getAuthPrincipal(final AuthState authState) {
+        final AuthScheme scheme = authState.getAuthScheme();
+        if (scheme != null && scheme.isComplete() && scheme.isConnectionBased()) {
+            final Credentials creds = authState.getCredentials();
+            if (creds != null) {
+                return creds.getUserPrincipal();
+            }
+        }
+        return null;
+    }
+
+}