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

mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/protocol/ResponseContentEncoding.java

@@ -0,0 +1,110 @@
+/*
+ * ====================================================================
+ * 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.client.protocol;
+
+import java.io.IOException;
+import java.util.Locale;
+
+import ch.boye.httpclientandroidlib.Header;
+import ch.boye.httpclientandroidlib.HeaderElement;
+import ch.boye.httpclientandroidlib.HttpEntity;
+import ch.boye.httpclientandroidlib.HttpException;
+import ch.boye.httpclientandroidlib.HttpResponse;
+import ch.boye.httpclientandroidlib.HttpResponseInterceptor;
+import ch.boye.httpclientandroidlib.annotation.Immutable;
+import ch.boye.httpclientandroidlib.client.entity.DeflateDecompressingEntity;
+import ch.boye.httpclientandroidlib.client.entity.GzipDecompressingEntity;
+import ch.boye.httpclientandroidlib.protocol.HttpContext;
+
+/**
+ * {@link HttpResponseInterceptor} responsible for processing Content-Encoding
+ * responses.
+ * <p>
+ * Instances of this class are stateless and immutable, therefore threadsafe.
+ *
+ * @since 4.1
+ *
+ */
+@Immutable
+public class ResponseContentEncoding implements HttpResponseInterceptor {
+
+    public static final String UNCOMPRESSED = "http.client.response.uncompressed";
+
+    /**
+     * Handles the following {@code Content-Encoding}s by
+     * using the appropriate decompressor to wrap the response Entity:
+     * <ul>
+     * <li>gzip - see {@link GzipDecompressingEntity}</li>
+     * <li>deflate - see {@link DeflateDecompressingEntity}</li>
+     * <li>identity - no action needed</li>
+     * </ul>
+     *
+     * @param response the response which contains the entity
+     * @param  context not currently used
+     *
+     * @throws HttpException if the {@code Content-Encoding} is none of the above
+     */
+    public void process(
+            final HttpResponse response,
+            final HttpContext context) throws HttpException, IOException {
+        final HttpEntity entity = response.getEntity();
+
+        // entity can be null in case of 304 Not Modified, 204 No Content or similar
+        // check for zero length entity.
+        if (entity != null && entity.getContentLength() != 0) {
+            final Header ceheader = entity.getContentEncoding();
+            if (ceheader != null) {
+                final HeaderElement[] codecs = ceheader.getElements();
+                boolean uncompressed = false;
+                for (final HeaderElement codec : codecs) {
+                    final String codecname = codec.getName().toLowerCase(Locale.ENGLISH);
+                    if ("gzip".equals(codecname) || "x-gzip".equals(codecname)) {
+                        response.setEntity(new GzipDecompressingEntity(response.getEntity()));
+                        uncompressed = true;
+                        break;
+                    } else if ("deflate".equals(codecname)) {
+                        response.setEntity(new DeflateDecompressingEntity(response.getEntity()));
+                        uncompressed = true;
+                        break;
+                    } else if ("identity".equals(codecname)) {
+
+                        /* Don't need to transform the content - no-op */
+                        return;
+                    } else {
+                        throw new HttpException("Unsupported Content-Coding: " + codec.getName());
+                    }
+                }
+                if (uncompressed) {
+                    response.removeHeaders("Content-Length");
+                    response.removeHeaders("Content-Encoding");
+                    response.removeHeaders("Content-MD5");
+                }
+            }
+        }
+    }
+
+}