com.npower.dm.msm.tools.PackageCheckerImpl.java Source code

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Here is the source code for com.npower.dm.msm.tools.PackageCheckerImpl.java

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/**
 * $Header: /home/master/nWave-DM-Common/src/com/npower/dm/msm/tools/PackageCheckerImpl.java,v 1.2 2008/05/08 06:54:26 zhao Exp $
 * $Revision: 1.2 $
 * $Date: 2008/05/08 06:54:26 $
 *
 * ===============================================================================================
 * License, Version 1.1
 *
 * Copyright (c) 1994-2008 NPower Network Software Ltd.  All rights reserved.
 *
 * This SOURCE CODE FILE, which has been provided by NPower as part
 * of a NPower product for use ONLY by licensed users of the product,
 * includes CONFIDENTIAL and PROPRIETARY information of NPower.
 *
 * USE OF THIS SOFTWARE IS GOVERNED BY THE TERMS AND CONDITIONS
 * OF THE LICENSE STATEMENT AND LIMITED WARRANTY FURNISHED WITH
 * THE PRODUCT.
 *
 * IN PARTICULAR, YOU WILL INDEMNIFY AND HOLD NPower, ITS RELATED
 * COMPANIES AND ITS SUPPLIERS, HARMLESS FROM AND AGAINST ANY CLAIMS
 * OR LIABILITIES ARISING OUT OF THE USE, REPRODUCTION, OR DISTRIBUTION
 * OF YOUR PROGRAMS, INCLUDING ANY CLAIMS OR LIABILITIES ARISING OUT OF
 * OR RESULTING FROM THE USE, MODIFICATION, OR DISTRIBUTION OF PROGRAMS
 * OR FILES CREATED FROM, BASED ON, AND/OR DERIVED FROM THIS SOURCE
 * CODE FILE.
 * ===============================================================================================
 */
package com.npower.dm.msm.tools;

import java.io.IOException;

import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.commons.lang.StringUtils;

import com.npower.dm.core.DMException;

/**
 * @author Zhao DongLu
 * @version $Revision: 1.2 $ $Date: 2008/05/08 06:54:26 $
 */
public class PackageCheckerImpl implements PackageChecker {

    /**
     * 
     */
    public PackageCheckerImpl() {
        super();
    }

    /* (non-Javadoc)
     * @see com.npower.dm.msm.tools.PackageChecker#getPackageMetaInfo(java.lang.String)
     */
    public PackageMetaInfo getPackageMetaInfo(String url) throws DMException {
        HttpClient client = new HttpClient();
        HttpMethod method = new GetMethod(url);
        // Provide custom retry handler is necessary
        method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
                new DefaultHttpMethodRetryHandler(3, false));

        PackageMetaInfo metaInfo = new PackageMetaInfo();
        metaInfo.setUrl(url);
        try {
            // Execute the method.
            int statusCode = client.executeMethod(method);
            metaInfo.setServerStatus(statusCode);
            if (statusCode != HttpStatus.SC_OK) {
                // System.err.println("Method failed: " + method.getStatusLine());
            }

            // Read the response body.
            byte[] responseBody = method.getResponseBody();
            System.out.println(new String(responseBody));

            Header mimeType = method.getResponseHeader("Content-Type");
            if (mimeType != null) {
                metaInfo.setMimeType(mimeType.getValue());
            }

            Header contentLength = method.getResponseHeader("Content-Length");
            if (contentLength != null && StringUtils.isNotEmpty(contentLength.getValue())) {
                metaInfo.setSize(Integer.parseInt(contentLength.getValue()));
            }

        } catch (HttpException e) {
            metaInfo.setErrorMessage(e.getMessage());
        } catch (IOException e) {
            metaInfo.setErrorMessage(e.getMessage());
        } finally {
            // Release the connection.
            method.releaseConnection();
        }
        return metaInfo;
    }

}