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

mobile/android/thirdparty/ch/boye/httpclientandroidlib/protocol/RequestTargetHost.java

@@ -0,0 +1,95 @@
+/*
+ * ====================================================================
+ * 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.protocol;
+
+import java.io.IOException;
+import java.net.InetAddress;
+
+import ch.boye.httpclientandroidlib.HttpConnection;
+import ch.boye.httpclientandroidlib.HttpException;
+import ch.boye.httpclientandroidlib.HttpHost;
+import ch.boye.httpclientandroidlib.HttpInetConnection;
+import ch.boye.httpclientandroidlib.HttpRequest;
+import ch.boye.httpclientandroidlib.HttpRequestInterceptor;
+import ch.boye.httpclientandroidlib.HttpVersion;
+import ch.boye.httpclientandroidlib.ProtocolException;
+import ch.boye.httpclientandroidlib.ProtocolVersion;
+import ch.boye.httpclientandroidlib.annotation.Immutable;
+import ch.boye.httpclientandroidlib.util.Args;
+
+/**
+ * RequestTargetHost is responsible for adding <code>Host</code> header. This
+ * interceptor is required for client side protocol processors.
+ *
+ * @since 4.0
+ */
+@Immutable
+public class RequestTargetHost implements HttpRequestInterceptor {
+
+    public RequestTargetHost() {
+        super();
+    }
+
+    public void process(final HttpRequest request, final HttpContext context)
+            throws HttpException, IOException {
+        Args.notNull(request, "HTTP request");
+
+        final HttpCoreContext corecontext = HttpCoreContext.adapt(context);
+
+        final ProtocolVersion ver = request.getRequestLine().getProtocolVersion();
+        final String method = request.getRequestLine().getMethod();
+        if (method.equalsIgnoreCase("CONNECT") && ver.lessEquals(HttpVersion.HTTP_1_0)) {
+            return;
+        }
+
+        if (!request.containsHeader(HTTP.TARGET_HOST)) {
+            HttpHost targethost = corecontext.getTargetHost();
+            if (targethost == null) {
+                final HttpConnection conn = corecontext.getConnection();
+                if (conn instanceof HttpInetConnection) {
+                    // Populate the context with a default HTTP host based on the
+                    // inet address of the target host
+                    final InetAddress address = ((HttpInetConnection) conn).getRemoteAddress();
+                    final int port = ((HttpInetConnection) conn).getRemotePort();
+                    if (address != null) {
+                        targethost = new HttpHost(address.getHostName(), port);
+                    }
+                }
+                if (targethost == null) {
+                    if (ver.lessEquals(HttpVersion.HTTP_1_0)) {
+                        return;
+                    } else {
+                        throw new ProtocolException("Target host missing");
+                    }
+                }
+            }
+            request.addHeader(HTTP.TARGET_HOST, targethost.toHostString());
+        }
+    }
+
+}