com.janoz.usenet.support.LogUtil.java Source code

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Here is the source code for com.janoz.usenet.support.LogUtil.java

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/*******************************************************************************
 * Copyright (c) 2010 Gijs de Vries aka Janoz.
 * 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:
 *     Gijs de Vries aka Janoz - initial API and implementation
 ******************************************************************************/
package com.janoz.usenet.support;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;

public final class LogUtil {

    private static final Log LOG = LogFactory.getLog(LogUtil.class);

    private static final int BUFF_SIZE = 1024;

    private LogUtil() {
        //
    }

    public static void logResponseHeader(HttpResponse response) {
        if (LOG.isTraceEnabled()) {
            StringBuilder sb = new StringBuilder("\n");
            StatusLine statusLine = response.getStatusLine();
            sb.append("HttpResponse response = new BasicHttpResponse(new ProtocolVersion(\"");
            sb.append(statusLine.getProtocolVersion().getProtocol());
            sb.append("\",");
            sb.append(statusLine.getProtocolVersion().getMajor());
            sb.append(",");
            sb.append(statusLine.getProtocolVersion().getMinor());
            sb.append("),");
            sb.append(statusLine.getStatusCode());
            sb.append(",\"");
            sb.append(statusLine.getReasonPhrase());
            sb.append("\");\n");

            Header[] headers = response.getAllHeaders();
            for (Header header : headers) {
                sb.append("response.addHeader(\"" + header.getName() + "\",\"" + header.getValue() + "\");\n");
            }
            LOG.trace(sb.toString());
        }

    }

    public static InputStream dumpStreamAndReOffer(InputStream is) throws IOException {
        FileOutputStream fos = null;
        try {
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            copyStream(is, os);
            byte[] data = os.toByteArray();
            fos = new FileOutputStream(File.createTempFile("dump", ".bin", new File(".")));
            fos.write(data);
            return new ByteArrayInputStream(data);
        } finally {
            if (fos != null) {
                fos.close();
            }
        }

    }

    private static void copyStream(InputStream in, OutputStream out) throws IOException {
        byte[] buffer = new byte[BUFF_SIZE];
        int len;

        while ((len = in.read(buffer)) >= 0) {
            out.write(buffer, 0, len);
        }
        in.close();
        out.close();
    }
}