Application: gvSIG desktop

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

*

* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

*

* This program is free software; you can redistribute it and/or

* modify it under the terms of the GNU General Public License

* as published by the Free Software Foundation; either version 2

* 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, write to the Free Software

* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

*

* For more information, contact:

*

*  Generalitat Valenciana

*   Conselleria d'Infraestructures i Transport

*   Av. Blasco Ib??ez, 50

*   46010 VALENCIA

*   SPAIN

*

*      +34 963862235

*   gvsig@gva.es

*      www.gvsig.gva.es

*

*    or

*

*   IVER T.I. S.A

*   Salamanca 50

*   46005 Valencia

*   Spain

*

*   +34 963163400

*   dac@iver.es

*/

package es.gva.cit.catalogClient.protocols;

import es.gva.cit.catalogClient.metadataXML.XMLTree;

import java.io.ByteArrayInputStream;

import java.io.InputStream;

import java.net.URL;

import java.util.Collection;

import org.apache.commons.httpclient.DefaultMethodRetryHandler;

import org.apache.commons.httpclient.HttpClient;

import org.apache.commons.httpclient.HttpStatus;

import org.apache.commons.httpclient.NameValuePair;

import org.apache.commons.httpclient.methods.GetMethod;

/**

 * 

 * 

 * 

 * @author Jorge Piera Llodra (piera_jor@gva.es)

 */

public class HTTPGetProtocol implements IProtocols {

/**

 * 

 * 

 * 

 * @return 

 * @param url 

 * @param object 

 * @param firstRecord 

 */

    public Collection doQuery(URL url, Object object, int firstRecord) {        

        NameValuePair[] parameters = (NameValuePair[]) object;

        InputStream is = null;

        ByteArrayInputStream output = null;

        //        Create an instance of HttpClient.

        HttpClient client = new HttpClient();

        //         Create a method instance.

        GetMethod method = new GetMethod("http://" + url.getHost() + ":" +

                url.getPort() + url.getPath());

        // Provide custom retry handler is necessary

        DefaultMethodRetryHandler retryhandler = new DefaultMethodRetryHandler();

        retryhandler.setRequestSentRetryEnabled(false);

        retryhandler.setRetryCount(3);

        method.setMethodRetryHandler(retryhandler);

        method.setQueryString(parameters);

        System.out.println(method.getQueryString());

        try {

            // Execute the method.

            int statusCode = client.executeMethod(method);

            //System.out.println("QueryString>>> "+ method.getQueryString());

            if (statusCode != HttpStatus.SC_OK) {

                System.err.println("Fallo en el m?todo: " +

                    method.getStatusLine());

                return null;

            }

            // Process the answer

            is = method.getResponseBodyAsStream();

            byte[] buffer = new byte[256];

            String str = new String("");

            while (true) {

                int n = is.read(buffer);

                if (n < 0) {

                    break;

                }

                str = str + new String(buffer, 0, n);

            }

            is.close();

            System.out.println(str);

            if (str.equals("")) {

                output = null;

            } else {

                output = new ByteArrayInputStream(str.getBytes());

            }

        } catch (Exception e) {

            return null;

        } finally {

            // Release the connection.

            method.releaseConnection();

        }

        Collection col = new java.util.ArrayList();

        col.add(XMLTree.xmlToTree(output));

        return col;

    } 

/**

 * 

 * 

 * 

 * @return 

 * @param url 

 */

    public static boolean isProtocolSupported(URL url) {        

        return true;

    } 

 }