1 /* 2 * Copyright 2003-2008 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * 16 * You are receiving this code free of charge, which represents many hours of 17 * effort from other individuals and corporations. As a responsible member 18 * of the community, you are asked (but not required) to donate any 19 * enhancements or improvements back to the community under a similar open 20 * source license. Thank you. -TMN 21 */ 22 package groovyx.net.http; 23 24 import static groovyx.net.http.ContentEncoding.Type.DEFLATE; 25 26 import java.io.IOException; 27 import java.io.InputStream; 28 import java.util.zip.InflaterInputStream; 29 30 import org.apache.http.HttpEntity; 31 import org.apache.http.entity.HttpEntityWrapper; 32 33 /** 34 * Content encoding used to handle Deflate responses. 35 * @author <a href='mailto:tnichols@enernoc.com'>Tom Nichols</a> 36 */ 37 public class DeflateEncoding extends ContentEncoding { 38 39 @Override 40 public String getContentEncoding() { 41 return DEFLATE.toString(); 42 } 43 44 45 /** 46 * Wraps the raw entity in a {@link InflaterEntity}. 47 */ 48 @Override 49 public HttpEntity wrapResponseEntity( HttpEntity raw ) { 50 return new InflaterEntity( raw ); 51 } 52 53 /** 54 * Entity used to interpret a Deflate-encoded response 55 * @author <a href='mailto:tnichols@enernoc.com'>Tom Nichols</a> 56 */ 57 public static class InflaterEntity extends HttpEntityWrapper { 58 59 public InflaterEntity(final HttpEntity entity) { 60 super(entity); 61 } 62 63 /** 64 * returns a {@link InflaterInputStream} which wraps the original entity's 65 * content stream 66 * @see HttpEntity#getContent() 67 */ 68 @Override 69 public InputStream getContent() throws IOException, IllegalStateException { 70 return new InflaterInputStream( wrappedEntity.getContent() ); 71 } 72 73 /** 74 * @return -1 75 */ 76 @Override 77 public long getContentLength() { 78 // length of ungzipped content is not known 79 return -1; 80 } 81 } 82 83 }