/* * ==================================================================== * 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 * . * */ package ch.boye.httpclientandroidlib.impl.client; import java.io.IOException; import java.net.URI; import ch.boye.httpclientandroidlib.HttpEntity; import ch.boye.httpclientandroidlib.HttpEntityEnclosingRequest; import ch.boye.httpclientandroidlib.HttpException; import ch.boye.httpclientandroidlib.HttpHost; import ch.boye.httpclientandroidlib.HttpRequest; import ch.boye.httpclientandroidlib.HttpRequestInterceptor; import ch.boye.httpclientandroidlib.HttpResponse; import ch.boye.httpclientandroidlib.HttpResponseInterceptor; import ch.boye.httpclientandroidlib.client.ClientProtocolException; import ch.boye.httpclientandroidlib.client.HttpClient; import ch.boye.httpclientandroidlib.client.ResponseHandler; import ch.boye.httpclientandroidlib.client.methods.HttpUriRequest; import ch.boye.httpclientandroidlib.client.protocol.RequestAcceptEncoding; import ch.boye.httpclientandroidlib.client.protocol.ResponseContentEncoding; import ch.boye.httpclientandroidlib.client.utils.URIUtils; import ch.boye.httpclientandroidlib.conn.ClientConnectionManager; import ch.boye.httpclientandroidlib.params.HttpParams; import ch.boye.httpclientandroidlib.protocol.BasicHttpContext; import ch.boye.httpclientandroidlib.protocol.HttpContext; import ch.boye.httpclientandroidlib.util.EntityUtils; /** *

Decorator adding support for compressed responses. This class sets * the Accept-Encoding header on requests to indicate * support for the gzip and deflate * compression schemes; it then checks the Content-Encoding * header on the response to uncompress any compressed response bodies. * The {@link java.io.InputStream} of the entity will contain the uncompressed * content.

* *

N.B. Any upstream clients of this class need to be aware that * this effectively obscures visibility into the length of a server * response body, since the Content-Length header will * correspond to the compressed entity length received from the server, * but the content length experienced by reading the response body may * be different (hopefully higher!).

* *

That said, this decorator is compatible with the * CachingHttpClient in that the two decorators can be added * in either order and still have cacheable responses be cached.

* * @since 4.2 * * @deprecated (4.3) use {@link HttpClientBuilder} */ @Deprecated public class DecompressingHttpClient implements HttpClient { private final HttpClient backend; private final HttpRequestInterceptor acceptEncodingInterceptor; private final HttpResponseInterceptor contentEncodingInterceptor; /** * Constructs a decorator to ask for and handle compressed * entities on the fly. */ public DecompressingHttpClient() { this(new DefaultHttpClient()); } /** * Constructs a decorator to ask for and handle compressed * entities on the fly. * @param backend the {@link HttpClient} to use for actually * issuing requests */ public DecompressingHttpClient(final HttpClient backend) { this(backend, new RequestAcceptEncoding(), new ResponseContentEncoding()); } DecompressingHttpClient(final HttpClient backend, final HttpRequestInterceptor requestInterceptor, final HttpResponseInterceptor responseInterceptor) { this.backend = backend; this.acceptEncodingInterceptor = requestInterceptor; this.contentEncodingInterceptor = responseInterceptor; } public HttpParams getParams() { return backend.getParams(); } public ClientConnectionManager getConnectionManager() { return backend.getConnectionManager(); } public HttpResponse execute(final HttpUriRequest request) throws IOException, ClientProtocolException { return execute(getHttpHost(request), request, (HttpContext)null); } /** * Gets the HttpClient to issue request. * * @return the HttpClient to issue request */ public HttpClient getHttpClient() { return this.backend; } HttpHost getHttpHost(final HttpUriRequest request) { final URI uri = request.getURI(); return URIUtils.extractHost(uri); } public HttpResponse execute(final HttpUriRequest request, final HttpContext context) throws IOException, ClientProtocolException { return execute(getHttpHost(request), request, context); } public HttpResponse execute(final HttpHost target, final HttpRequest request) throws IOException, ClientProtocolException { return execute(target, request, (HttpContext)null); } public HttpResponse execute(final HttpHost target, final HttpRequest request, final HttpContext context) throws IOException, ClientProtocolException { try { final HttpContext localContext = context != null ? context : new BasicHttpContext(); final HttpRequest wrapped; if (request instanceof HttpEntityEnclosingRequest) { wrapped = new EntityEnclosingRequestWrapper((HttpEntityEnclosingRequest) request); } else { wrapped = new RequestWrapper(request); } acceptEncodingInterceptor.process(wrapped, localContext); final HttpResponse response = backend.execute(target, wrapped, localContext); try { contentEncodingInterceptor.process(response, localContext); if (Boolean.TRUE.equals(localContext.getAttribute(ResponseContentEncoding.UNCOMPRESSED))) { response.removeHeaders("Content-Length"); response.removeHeaders("Content-Encoding"); response.removeHeaders("Content-MD5"); } return response; } catch (final HttpException ex) { EntityUtils.consume(response.getEntity()); throw ex; } catch (final IOException ex) { EntityUtils.consume(response.getEntity()); throw ex; } catch (final RuntimeException ex) { EntityUtils.consume(response.getEntity()); throw ex; } } catch (final HttpException e) { throw new ClientProtocolException(e); } } public T execute(final HttpUriRequest request, final ResponseHandler responseHandler) throws IOException, ClientProtocolException { return execute(getHttpHost(request), request, responseHandler); } public T execute(final HttpUriRequest request, final ResponseHandler responseHandler, final HttpContext context) throws IOException, ClientProtocolException { return execute(getHttpHost(request), request, responseHandler, context); } public T execute(final HttpHost target, final HttpRequest request, final ResponseHandler responseHandler) throws IOException, ClientProtocolException { return execute(target, request, responseHandler, null); } public T execute(final HttpHost target, final HttpRequest request, final ResponseHandler responseHandler, final HttpContext context) throws IOException, ClientProtocolException { final HttpResponse response = execute(target, request, context); try { return responseHandler.handleResponse(response); } finally { final HttpEntity entity = response.getEntity(); if (entity != null) { EntityUtils.consume(entity); } } } }