net.sf.jasperreports.data.http.HttpDataConnection.java Source code

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Here is the source code for net.sf.jasperreports.data.http.HttpDataConnection.java

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/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports 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 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports 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 JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.jasperreports.data.http;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpEntity;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;

import net.sf.jasperreports.data.DataFileConnection;
import net.sf.jasperreports.engine.JRRuntimeException;

/**
 * @author Lucian Chirita (lucianc@users.sourceforge.net)
 */
public class HttpDataConnection implements DataFileConnection {

    private static final Log log = LogFactory.getLog(HttpDataConnection.class);
    public static final String EXCEPTION_MESSAGE_KEY_NO_RESPONSE = "data.http.no.response";
    public static final String EXCEPTION_MESSAGE_KEY_STATUS_CODE_ERROR = "data.http.status.code.error";

    private final CloseableHttpClient httpClient;
    private final HttpRequestBase request;
    private CloseableHttpResponse response;

    public HttpDataConnection(CloseableHttpClient httpClient, HttpRequestBase request) {
        this.httpClient = httpClient;
        this.request = request;
    }

    @Override
    public InputStream getInputStream() {
        try {
            response = httpClient.execute(request);
            StatusLine status = response.getStatusLine();
            if (log.isDebugEnabled()) {
                log.debug("HTTP response status " + status);
            }

            HttpEntity entity = response.getEntity();
            if (entity == null) {
                throw new JRRuntimeException(EXCEPTION_MESSAGE_KEY_NO_RESPONSE, (Object[]) null);
            }

            if (status.getStatusCode() >= 300) {
                EntityUtils.consumeQuietly(entity);
                //FIXME include request URI in the exception?  that might be a security issue
                throw new JRRuntimeException(EXCEPTION_MESSAGE_KEY_STATUS_CODE_ERROR, new Object[] { status });
            }

            return entity.getContent();
        } catch (ClientProtocolException e) {
            throw new JRRuntimeException(e);
        } catch (IOException e) {
            throw new JRRuntimeException(e);
        }
    }

    @Override
    public void dispose() {
        if (response != null) {
            try {
                response.close();
            } catch (IOException e) {
                if (log.isWarnEnabled()) {
                    log.warn("Error closing HTTP response", e);
                }
            }
        }

        try {
            httpClient.close();
        } catch (IOException e) {
            if (log.isWarnEnabled()) {
                log.warn("Error closing HTTP client", e);
            }
        }
    }

}