org.eclipse.mylyn.internal.bugzilla.core.GzipGetMethod.java Source code

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Here is the source code for org.eclipse.mylyn.internal.bugzilla.core.GzipGetMethod.java

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/*******************************************************************************
 * Copyright (c) 2004, 2010 Maarten Meijer and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Maarten Meijer - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.internal.bugzilla.core;

import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.httpclient.HttpConnection;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpState;
import org.apache.commons.httpclient.methods.GetMethod;

/**
 * Use <code>GzipGetMethod</code> instead of {@link GetMethod} to make Mylyn well-behaved when accessing repositories
 * that can supply gzipped responses.<br />
 * <br>
 * References:
 * <ul>
 * <li><a href="http://www.schroepl.net/projekte/mod_gzip/index.htm">Gzip home</a></li>
 * <li><a href="http://www.oreilly.com/catalog/9780596529307/chapter/ch04.pdf">Gzip site comparison</a></li>
 * </ul>
 * 
 * @see GzipPostMethod, GetMethod
 * @author Maarten Meijer
 */
public class GzipGetMethod extends GetMethod {
    private final boolean gzipWanted;

    /**
     * @param requestPath
     *            the URI to request
     * @param gzipWanted
     *            is compression desired (for debugging or optionalizing)
     */
    public GzipGetMethod(String requestPath, boolean gzipWanted) {
        super(requestPath);
        this.gzipWanted = gzipWanted;
    }

    @Override
    public int execute(HttpState state, HttpConnection conn) throws HttpException, IOException {
        // Insert accept-encoding header
        if (gzipWanted) {
            this.setRequestHeader("Accept-encoding", IBugzillaConstants.CONTENT_ENCODING_GZIP); //$NON-NLS-1$
        }
        int result = super.execute(state, conn);
        return result;
    }

    /**
     * getResponseBodyNoop is meant for clearing the response body in case of error. The result is never used so no need
     * to unzip it first.
     * 
     * @throws IOException
     * @deprecated this is handled in {@link org.apache.commons.httpclient.HttpClient} connection release
     */

    @Deprecated
    public void getResponseBodyNoop() throws IOException {
        InputStream instream;
        try {
            instream = getResponseBodyAsStream();
            if (instream != null) {
                byte[] buffer = new byte[4096];
                while (instream.read(buffer) > 0) {
                }
            }
        } catch (IOException e) {
            // ignore
        }
    }

}