eu.learnpad.rest.utils.internal.DefaultRestUtils.java Source code

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Here is the source code for eu.learnpad.rest.utils.internal.DefaultRestUtils.java

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/*
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * 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 eu.learnpad.rest.utils.internal;

import java.io.IOException;
import java.io.InputStream;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.apache.commons.httpclient.Credentials;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.UsernamePasswordCredentials;
import org.apache.commons.httpclient.auth.AuthScope;
import org.apache.commons.httpclient.methods.ByteArrayRequestEntity;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.InputStreamRequestEntity;
import org.apache.commons.httpclient.methods.PutMethod;
import org.apache.commons.httpclient.methods.RequestEntity;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.xwiki.component.annotation.Component;

import eu.learnpad.rest.utils.RestResource;
import eu.learnpad.rest.utils.RestUtils;

@Component
@Singleton
public class DefaultRestUtils extends RestResource implements RestUtils {

    @Inject
    Logger logger;

    @Override
    public boolean putPage(String spaceName, String pageName, InputStream pageXML) {
        HttpClient httpClient = getClient();

        String uri = REST_URI + "/wikis/xwiki/spaces/" + spaceName + "/pages/" + pageName;
        PutMethod putMethod = new PutMethod(uri);
        putMethod.addRequestHeader("Accept", "application/xml");
        putMethod.addRequestHeader("Accept-Ranges", "bytes");

        RequestEntity pageRequestEntity = new InputStreamRequestEntity(pageXML, "application/xml");
        putMethod.setRequestEntity(pageRequestEntity);
        try {
            httpClient.executeMethod(putMethod);
            return true;
        } catch (HttpException e) {
            logger.error("Unable to process the PUT request on page '" + spaceName + "." + pageName + "'.", e);
            return false;
        } catch (IOException e) {
            logger.error("Unable to PUT the page '" + spaceName + "." + pageName + "'.", e);
            return false;
        }
    }

    @Override
    public boolean isPage(String spaceName, String pageName) {
        HttpClient httpClient = getClient();

        String uri = REST_URI + "/wikis/xwiki/spaces/" + spaceName + "/pages/" + pageName;
        GetMethod getMethod = new GetMethod(uri);
        getMethod.addRequestHeader("Accept", "application/xml");
        getMethod.addRequestHeader("Accept-Ranges", "bytes");
        try {
            int statusCode = httpClient.executeMethod(getMethod);
            if (statusCode == 200) {
                return true;
            }
        } catch (HttpException e) {
            logger.error("Unable to process the GET request on page '" + spaceName + "." + pageName + "'.", e);
            return false;
        } catch (IOException e) {
            logger.error("Unable to GET the page '" + spaceName + "." + pageName + "'.", e);
            return false;
        }
        return false;
    }

    @Override
    public boolean createEmptyPage(String spaceName, String pageName) {
        String emptyPageXML = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><page xmlns=\"http://www.xwiki.org\"><content/></page>";
        return putPage(spaceName, pageName, IOUtils.toInputStream(emptyPageXML));
    }

    @Override
    public byte[] getAttachment(String spaceName, String pageName, String attachmentName) {
        HttpClient httpClient = getClient();

        String uri = REST_URI + "/wikis/xwiki/spaces/" + spaceName + "/pages/" + pageName + "/attachments/"
                + attachmentName;
        GetMethod getMethod = new GetMethod(uri);
        getMethod.addRequestHeader("Accept", "application/xml");
        getMethod.addRequestHeader("Accept-Ranges", "bytes");

        try {
            httpClient.executeMethod(getMethod);
            return getMethod.getResponseBody();
        } catch (HttpException e) {
            logger.error("Unable to process PUT request for the attachment '" + spaceName + "." + pageName + "/"
                    + attachmentName + "'.", e);
            return null;
        } catch (IOException e) {
            logger.error(
                    "Unable to PUT the attachment '" + spaceName + "." + pageName + "/" + attachmentName + "'.", e);
            return null;
        }
    }

    @Override
    public boolean putAttachment(String spaceName, String pageName, String attachmentName, byte[] attachment) {
        HttpClient httpClient = getClient();

        String uri = REST_URI + "/wikis/xwiki/spaces/" + spaceName + "/pages/" + pageName + "/attachments/"
                + attachmentName;
        PutMethod putMethod = new PutMethod(uri);
        putMethod.addRequestHeader("Accept", "application/xml");
        putMethod.addRequestHeader("Accept-Ranges", "bytes");
        RequestEntity fileRequestEntity = new ByteArrayRequestEntity(attachment, "application/xml");
        putMethod.setRequestEntity(fileRequestEntity);
        try {
            httpClient.executeMethod(putMethod);
            return true;
        } catch (HttpException e) {
            logger.error("Unable to process PUT request for the attachment '" + spaceName + "." + pageName + "/"
                    + attachmentName + "'.", e);
            return false;
        } catch (IOException e) {
            logger.error(
                    "Unable to PUT the attachment '" + spaceName + "." + pageName + "/" + attachmentName + "'.", e);
            return false;
        }
    }
}