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

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

@@ -0,0 +1,133 @@
+/*
+ * ====================================================================
+ * 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 ch.boye.httpclientandroidlib.HttpEntity;
+import ch.boye.httpclientandroidlib.HttpException;
+import ch.boye.httpclientandroidlib.HttpResponse;
+import ch.boye.httpclientandroidlib.HttpResponseInterceptor;
+import ch.boye.httpclientandroidlib.HttpStatus;
+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;
+
+/**
+ * ResponseContent is the most important interceptor for outgoing responses.
+ * It is responsible for delimiting content length by adding
+ * <code>Content-Length</code> or <code>Transfer-Content</code> headers based
+ * on the properties of the enclosed entity and the protocol version.
+ * This interceptor is required for correct functioning of server side protocol
+ * processors.
+ *
+ * @since 4.0
+ */
+@Immutable
+public class ResponseContent implements HttpResponseInterceptor {
+
+    private final boolean overwrite;
+
+    /**
+     * Default constructor. The <code>Content-Length</code> or <code>Transfer-Encoding</code>
+     * will cause the interceptor to throw {@link ProtocolException} if already present in the
+     * response message.
+     */
+    public ResponseContent() {
+        this(false);
+    }
+
+    /**
+     * Constructor that can be used to fine-tune behavior of this interceptor.
+     *
+     * @param overwrite If set to <code>true</code> the <code>Content-Length</code> and
+     * <code>Transfer-Encoding</code> headers will be created or updated if already present.
+     * If set to <code>false</code> the <code>Content-Length</code> and
+     * <code>Transfer-Encoding</code> headers will cause the interceptor to throw
+     * {@link ProtocolException} if already present in the response message.
+     *
+     * @since 4.2
+     */
+     public ResponseContent(final boolean overwrite) {
+         super();
+         this.overwrite = overwrite;
+    }
+
+    /**
+     * Processes the response (possibly updating or inserting) Content-Length and Transfer-Encoding headers.
+     * @param response The HttpResponse to modify.
+     * @param context Unused.
+     * @throws ProtocolException If either the Content-Length or Transfer-Encoding headers are found.
+     * @throws IllegalArgumentException If the response is null.
+     */
+    public void process(final HttpResponse response, final HttpContext context)
+            throws HttpException, IOException {
+        Args.notNull(response, "HTTP response");
+        if (this.overwrite) {
+            response.removeHeaders(HTTP.TRANSFER_ENCODING);
+            response.removeHeaders(HTTP.CONTENT_LEN);
+        } else {
+            if (response.containsHeader(HTTP.TRANSFER_ENCODING)) {
+                throw new ProtocolException("Transfer-encoding header already present");
+            }
+            if (response.containsHeader(HTTP.CONTENT_LEN)) {
+                throw new ProtocolException("Content-Length header already present");
+            }
+        }
+        final ProtocolVersion ver = response.getStatusLine().getProtocolVersion();
+        final HttpEntity entity = response.getEntity();
+        if (entity != null) {
+            final long len = entity.getContentLength();
+            if (entity.isChunked() && !ver.lessEquals(HttpVersion.HTTP_1_0)) {
+                response.addHeader(HTTP.TRANSFER_ENCODING, HTTP.CHUNK_CODING);
+            } else if (len >= 0) {
+                response.addHeader(HTTP.CONTENT_LEN, Long.toString(entity.getContentLength()));
+            }
+            // Specify a content type if known
+            if (entity.getContentType() != null && !response.containsHeader(
+                    HTTP.CONTENT_TYPE )) {
+                response.addHeader(entity.getContentType());
+            }
+            // Specify a content encoding if known
+            if (entity.getContentEncoding() != null && !response.containsHeader(
+                    HTTP.CONTENT_ENCODING)) {
+                response.addHeader(entity.getContentEncoding());
+            }
+        } else {
+            final int status = response.getStatusLine().getStatusCode();
+            if (status != HttpStatus.SC_NO_CONTENT
+                    && status != HttpStatus.SC_NOT_MODIFIED
+                    && status != HttpStatus.SC_RESET_CONTENT) {
+                response.addHeader(HTTP.CONTENT_LEN, "0");
+            }
+        }
+    }
+
+}