org.exoplatform.applications.ooplugin.client.DavCommand.java Source code

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Here is the source code for org.exoplatform.applications.ooplugin.client.DavCommand.java

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/*
 * Copyright (C) 2003-2007 eXo Platform SAS.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see<http://www.gnu.org/licenses/>.
 */

package org.exoplatform.applications.ooplugin.client;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Writer;
import java.util.ArrayList;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.apache.commons.codec.binary.Base64;
import org.exoplatform.services.rest.ExtHttpHeaders;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.ls.LSOutput;

/**
 * Created by The eXo Platform SAS Author.
 * 
 * @author <a href="mailto:gavrikvetal@gmail.com">Vitaly Guly</a>
 * @version $Id: $
 */

public abstract class DavCommand {

    public static final String AUTH_BASIC = "Basic";

    protected String commandName;

    protected WebDavContext context = null;

    protected String resourcePath;

    private long rangeStart = -1;

    private long rangeEnd = -1;

    protected HttpClient client;

    protected byte[] requestDataBytes = null;

    protected InputStream inStream = null;

    protected byte[] responseDataBytes = null;

    private boolean enableXml = true;

    public DavCommand(WebDavContext context) throws Exception {
        this.context = context;
        client = new HttpClient(context.getHost(), context.getPort());
    }

    public void setResourcePath(String resourcePath) {
        this.resourcePath = resourcePath;
    }

    public void setRange(int rangeStart) {
        this.rangeStart = rangeStart;
    }

    public void setRange(int rangeStart, int rangeEnd) {
        this.rangeStart = rangeStart;
        this.rangeEnd = rangeEnd;
    }

    public void setRequestDataBuffer(byte[] requestDataBytes) {
        this.requestDataBytes = requestDataBytes;
    }

    public void setRequestInputStream(InputStream inStream, long streamLength) throws Exception {
        this.inStream = inStream;
        client.setRequestHeader(ExtHttpHeaders.CONTENTLENGTH, "" + streamLength);
    }

    public void setXmlEnabled(boolean enableXml) {
        this.enableXml = enableXml;
    }

    public void setLockToken(String lockToken) throws Exception {
        client.setRequestHeader(ExtHttpHeaders.LOCKTOKEN, "<" + lockToken + ">");
    }

    public String getResponseHeader(String headerName) {
        return client.getResponseHeader(headerName);
    }

    public ArrayList<String> getResponseHeadersNames() {
        return client.getResponseHeadersNames();
    }

    public byte[] getResponseDataBuffer() {
        return client.getResponseBytes();
    }

    private static Document getDomDocument() throws Exception {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        return builder.newDocument();
    }

    public int execute() throws Exception {
        if (enableXml) {
            Document xmlDocument = getDomDocument();
            Element rootElement = toXml(xmlDocument);
            if (rootElement != null) {
                serializeElement(rootElement);
            }
        }

        if (inStream != null) {
            client.setRequestStream(inStream);
        } else {
            if (requestDataBytes != null) {
                client.setRequestBody(requestDataBytes);
            }
        }

        client.setHttpCommand(commandName);

        String path = context.getServletPath();
        if (resourcePath != null) {
            path += resourcePath;
        }

        client.setRequestPath(path);

        if (context.getUserId() != null) {
            String userId = context.getUserId();
            String userPass = context.getUserPass();

            byte[] encoded = Base64.encodeBase64(new String(userId + ":" + userPass).getBytes());
            String encodedAuth = new String(encoded);
            client.setRequestHeader(ExtHttpHeaders.AUTHORIZATION, AUTH_BASIC + " " + encodedAuth);
        }

        if (rangeStart >= 0) {
            String rangeHeader = "bytes=" + rangeStart + "-";
            if (rangeEnd >= 0) {
                rangeHeader += rangeEnd;
            }
            client.setRequestHeader(ExtHttpHeaders.RANGE, rangeHeader);
        }

        client.conect();
        int status = client.execute();
        finalExecute();
        return status;
    }

    public void finalExecute() {
    }

    public Element toXml(Document xmlDocument) {
        return null;
    }

    private void serializeElement(Element element) throws Exception {
        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();

        DOMSource source = new DOMSource(element.getOwnerDocument());

        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        StreamResult resultStream = new StreamResult(outStream);

        transformer.transform(source, resultStream);
        requestDataBytes = outStream.toByteArray();
    }

    static class Output implements LSOutput {

        OutputStream bs;

        Writer cs;

        String sId;

        String enc;

        public Output() {
            bs = null;
            cs = null;
            sId = null;
            enc = "UTF-8";
        }

        public OutputStream getByteStream() {
            return bs;
        }

        public void setByteStream(OutputStream byteStream) {
            bs = byteStream;
        }

        public Writer getCharacterStream() {
            return cs;
        }

        public void setCharacterStream(Writer characterStream) {
            cs = characterStream;
        }

        public String getSystemId() {
            return sId;
        }

        public void setSystemId(String systemId) {
            sId = systemId;
        }

        public String getEncoding() {
            return enc;
        }

        public void setEncoding(String encoding) {
            enc = encoding;
        }
    }

}