001 /* 002 * Copyright 2003-2008 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * You are receiving this code free of charge, which represents many hours of 017 * effort from other individuals and corporations. As a responsible member 018 * of the community, you are asked (but not required) to donate any 019 * enhancements or improvements back to the community under a similar open 020 * source license. Thank you. -TMN 021 */ 022 package groovyx.net.http; 023 024 import static groovyx.net.http.ContentEncoding.Type.DEFLATE; 025 026 import java.io.IOException; 027 import java.io.InputStream; 028 import java.util.zip.InflaterInputStream; 029 030 import org.apache.http.HttpEntity; 031 import org.apache.http.entity.HttpEntityWrapper; 032 033 /** 034 * Content encoding used to handle Deflate responses. 035 * @author <a href='mailto:tnichols@enernoc.com'>Tom Nichols</a> 036 */ 037 public class DeflateEncoding extends ContentEncoding { 038 039 @Override 040 public String getContentEncoding() { 041 return DEFLATE.toString(); 042 } 043 044 045 /** 046 * Wraps the raw entity in a {@link InflaterEntity}. 047 */ 048 @Override 049 public HttpEntity wrapResponseEntity( HttpEntity raw ) { 050 return new InflaterEntity( raw ); 051 } 052 053 /** 054 * Entity used to interpret a Deflate-encoded response 055 * @author <a href='mailto:tnichols@enernoc.com'>Tom Nichols</a> 056 */ 057 public static class InflaterEntity extends HttpEntityWrapper { 058 059 public InflaterEntity(final HttpEntity entity) { 060 super(entity); 061 } 062 063 /** 064 * returns a {@link InflaterInputStream} which wraps the original entity's 065 * content stream 066 * @see HttpEntity#getContent() 067 */ 068 @Override 069 public InputStream getContent() throws IOException, IllegalStateException { 070 return new InflaterInputStream( wrappedEntity.getContent() ); 071 } 072 073 /** 074 * @return -1 075 */ 076 @Override 077 public long getContentLength() { 078 // length of ungzipped content is not known 079 return -1; 080 } 081 } 082 083 }