org.jboss.ejb3.packagemanager.retriever.impl.HttpPackageRetriever.java Source code

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Here is the source code for org.jboss.ejb3.packagemanager.retriever.impl.HttpPackageRetriever.java

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/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb3.packagemanager.retriever.impl;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.jboss.ejb3.packagemanager.PackageManagerContext;
import org.jboss.ejb3.packagemanager.exception.PackageRetrievalException;
import org.jboss.ejb3.packagemanager.retriever.PackageRetriever;

/**
 * HttpPackageRetriever
 *
 * @author Jaikiran Pai
 * @version $Revision: $
 */
public class HttpPackageRetriever implements PackageRetriever {

    /**
     * @see org.jboss.ejb3.packagemanager.retriever.PackageRetriever#retrievePackage(PackageManagerContext, URL)
     */
    @Override
    public File retrievePackage(PackageManagerContext pkgMgrCtx, URL packagePath) throws PackageRetrievalException {
        if (!packagePath.getProtocol().equals("http")) {
            throw new PackageRetrievalException("Cannot handle " + packagePath);
        }
        HttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(packagePath.toExternalForm());
        HttpResponse httpResponse = null;
        try {
            httpResponse = httpClient.execute(httpGet);
        } catch (Exception e) {
            throw new PackageRetrievalException("Exception while retrieving package " + packagePath, e);
        }
        if (httpResponse.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
            throw new PackageRetrievalException("Http retrieval wasn't successful, returned status code  "
                    + httpResponse.getStatusLine().getStatusCode());
        }
        HttpEntity httpEntity = httpResponse.getEntity();

        try {
            // TODO: should this tmp be deleted on exit?
            File tmpPkgFile = File.createTempFile("tmp", ".jar",
                    pkgMgrCtx.getPackageManagerEnvironment().getPackageManagerTmpDir());
            FileOutputStream fos = new FileOutputStream(tmpPkgFile);
            BufferedOutputStream bos = null;
            BufferedInputStream bis = null;
            try {
                bos = new BufferedOutputStream(fos);
                InputStream is = httpEntity.getContent();
                bis = new BufferedInputStream(is);
                byte[] content = new byte[4096];
                int length;
                while ((length = bis.read(content)) != -1) {
                    bos.write(content, 0, length);
                }
                bos.flush();
            } finally {
                if (bos != null) {
                    bos.close();
                }
                if (bis != null) {
                    bis.close();
                }
            }
            return tmpPkgFile;

        } catch (IOException ioe) {
            throw new PackageRetrievalException("Could not process the retrieved package", ioe);
        }
        // TODO: I need to read the HttpClient 4.x javadocs to figure out the API for closing the
        // Http connection

    }
}