michael@0: /* michael@0: * ==================================================================== michael@0: * michael@0: * Licensed to the Apache Software Foundation (ASF) under one or more michael@0: * contributor license agreements. See the NOTICE file distributed with michael@0: * this work for additional information regarding copyright ownership. michael@0: * The ASF licenses this file to You under the Apache License, Version 2.0 michael@0: * (the "License"); you may not use this file except in compliance with michael@0: * the License. You may obtain a copy of the License at michael@0: * michael@0: * http://www.apache.org/licenses/LICENSE-2.0 michael@0: * michael@0: * Unless required by applicable law or agreed to in writing, software michael@0: * distributed under the License is distributed on an "AS IS" BASIS, michael@0: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. michael@0: * See the License for the specific language governing permissions and michael@0: * limitations under the License. michael@0: * ==================================================================== michael@0: * michael@0: * This software consists of voluntary contributions made by many michael@0: * individuals on behalf of the Apache Software Foundation. For more michael@0: * information on the Apache Software Foundation, please see michael@0: * . michael@0: * michael@0: */ michael@0: michael@0: package ch.boye.httpclientandroidlib.client.protocol; michael@0: michael@0: import java.io.IOException; michael@0: import java.util.Locale; michael@0: michael@0: import ch.boye.httpclientandroidlib.Header; michael@0: import ch.boye.httpclientandroidlib.HeaderElement; michael@0: import ch.boye.httpclientandroidlib.HttpEntity; michael@0: import ch.boye.httpclientandroidlib.HttpException; michael@0: import ch.boye.httpclientandroidlib.HttpResponse; michael@0: import ch.boye.httpclientandroidlib.HttpResponseInterceptor; michael@0: import ch.boye.httpclientandroidlib.annotation.Immutable; michael@0: import ch.boye.httpclientandroidlib.client.entity.DeflateDecompressingEntity; michael@0: import ch.boye.httpclientandroidlib.client.entity.GzipDecompressingEntity; michael@0: import ch.boye.httpclientandroidlib.protocol.HttpContext; michael@0: michael@0: /** michael@0: * {@link HttpResponseInterceptor} responsible for processing Content-Encoding michael@0: * responses. michael@0: *

michael@0: * Instances of this class are stateless and immutable, therefore threadsafe. michael@0: * michael@0: * @since 4.1 michael@0: * michael@0: */ michael@0: @Immutable michael@0: public class ResponseContentEncoding implements HttpResponseInterceptor { michael@0: michael@0: /** michael@0: * Handles the following {@code Content-Encoding}s by michael@0: * using the appropriate decompressor to wrap the response Entity: michael@0: *

michael@0: * michael@0: * @param response the response which contains the entity michael@0: * @param context not currently used michael@0: * michael@0: * @throws HttpException if the {@code Content-Encoding} is none of the above michael@0: */ michael@0: public void process( michael@0: final HttpResponse response, michael@0: final HttpContext context) throws HttpException, IOException { michael@0: HttpEntity entity = response.getEntity(); michael@0: michael@0: // It wasn't a 304 Not Modified response, 204 No Content or similar michael@0: if (entity != null) { michael@0: Header ceheader = entity.getContentEncoding(); michael@0: if (ceheader != null) { michael@0: HeaderElement[] codecs = ceheader.getElements(); michael@0: for (HeaderElement codec : codecs) { michael@0: String codecname = codec.getName().toLowerCase(Locale.US); michael@0: if ("gzip".equals(codecname) || "x-gzip".equals(codecname)) { michael@0: response.setEntity(new GzipDecompressingEntity(response.getEntity())); michael@0: return; michael@0: } else if ("deflate".equals(codecname)) { michael@0: response.setEntity(new DeflateDecompressingEntity(response.getEntity())); michael@0: return; michael@0: } else if ("identity".equals(codecname)) { michael@0: michael@0: /* Don't need to transform the content - no-op */ michael@0: return; michael@0: } else { michael@0: throw new HttpException("Unsupported Content-Coding: " + codec.getName()); michael@0: } michael@0: } michael@0: } michael@0: } michael@0: } michael@0: michael@0: }