com.liferay.util.servlet.fileupload.LiferayInputStream.java Source code

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Here is the source code for com.liferay.util.servlet.fileupload.LiferayInputStream.java

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/**
 * Copyright (c) 2000-2005 Liferay, LLC. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.liferay.util.servlet.fileupload;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.liferay.util.servlet.ByteArrayInputStreamWrapper;
import com.liferay.util.servlet.ServletInputStreamWrapper;

/**
 * <a href="LiferayInputStream.java.html"><b><i>View Source</i></b></a>
 *
 * @author  Brian Myunghun Kim
 * @author  Brian Wing Shun Chan
 * @version $Revision: 1.2 $
 *
 */
public class LiferayInputStream extends ServletInputStreamWrapper {

    public LiferayInputStream(HttpServletRequest req) throws IOException {
        super(req.getInputStream());

        _req = req;
        _ses = req.getSession();
        _totalSize = req.getContentLength();
    }

    public int read(byte[] b, int off, int len) throws IOException {
        int bytesRead = super.read(b, off, len);

        if (bytesRead > 0) {
            _totalRead += bytesRead;
        } else {
            _totalRead = _totalSize;
        }

        float percent = _totalRead / _totalSize;

        _log.debug(bytesRead + "/" + _totalRead + "=" + percent);

        _ses.setAttribute(LiferayFileUpload.PERCENT, new Float(percent));

        _cachedBytes.write(b);

        return bytesRead;
    }

    public ServletInputStream getCachedInputStream() throws IOException {
        return new ByteArrayInputStreamWrapper(new ByteArrayInputStream(_cachedBytes.toByteArray()));
    }

    private static final Log _log = LogFactory.getLog(LiferayInputStream.class);

    private HttpServletRequest _req;
    private HttpSession _ses;
    private float _totalRead;
    private int _totalSize;
    private ByteArrayOutputStream _cachedBytes = new ByteArrayOutputStream();

}