org.akita.io.GzipDecompressingEntity.java Source code

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Here is the source code for org.akita.io.GzipDecompressingEntity.java

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/*
 * Copyright 1999-2101 Alibaba Group.
 *
 * Licensed 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.
 */
package org.akita.io;

import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;

import org.apache.http.HttpEntity;
import org.apache.http.entity.HttpEntityWrapper;

/**
 *  
 * @author zhe.yangz 2012-2-14 ?07:16:12
 */
class GzipDecompressingEntity extends HttpEntityWrapper {

    public GzipDecompressingEntity(final HttpEntity entity) {
        super(entity);
    }

    @Override
    public InputStream getContent() throws IOException, IllegalStateException {

        // the wrapped entity's getContent() decides about repeatability
        InputStream wrappedin = wrappedEntity.getContent();

        return new GZIPInputStream(wrappedin);
    }

    @Override
    public long getContentLength() {
        // length of ungzipped content is not known
        return -1;
    }

}