com.berrysys.ussdgw.HttpUtils.java Source code

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Here is the source code for com.berrysys.ussdgw.HttpUtils.java

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/*
 * BerrySys SigTran USSDGW
 * Copyright (C) 2015 BerrySys S.A. de C.V. 
 *
 * This program is free software: you can redistribute it and/or modify
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

package com.berrysys.ussdgw;

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

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import javolution.xml.stream.XMLStreamException;

import org.apache.commons.io.IOUtils;
import org.apache.logging.log4j.LogManager;
import org.mobicents.protocols.ss7.map.api.MAPException;
import org.mobicents.protocols.ss7.map.api.service.supplementary.MAPDialogSupplementary;
import org.mobicents.protocols.ss7.map.api.service.supplementary.ProcessUnstructuredSSRequest;
import org.mobicents.protocols.ss7.map.api.service.supplementary.UnstructuredSSNotifyRequest;
import org.mobicents.protocols.ss7.map.api.service.supplementary.UnstructuredSSRequest;
import org.mobicents.ussdgateway.Dialog;
import org.mobicents.ussdgateway.EventsSerializeFactory;

/**
 * The Class HttpUtils.
 */
public class HttpUtils {

    /** The log. */
    private static org.apache.logging.log4j.Logger log = LogManager.getLogger(HttpUtils.class);

    /**
     * Do post.
     *
     * @param req the req
     * @param resp the resp
     * @param dialogListener the dialog listener
     * @throws IOException Signals that an I/O exception has occurred.
     */
    public static void doPost(HttpServletRequest req, HttpServletResponse resp, final DialogListener dialogListener)
            throws IOException {

        boolean available = GlobalNetworkInitiatedSemaphore.getInstance().getSemaphore().tryAcquire();

        if (!available) {
            queueFullLogic(resp);
            return;
        }

        final String ussdAppUrl = req.getHeader("ussd-app-url");

        log.trace(String.format("ussd-app-url: %s", ussdAppUrl));

        final String payload = getPayload(req);

        log.trace(String.format("payload: %s", payload));

        HawtDispatchUtil.getInstance().queueExecute(new Runnable() {

            @Override
            public void run() {
                processHttpRequest(payload, ussdAppUrl, dialogListener);
            }

        });

        String response = "Request received successfully.";

        resp.setContentType("text/html");
        resp.setStatus(HttpServletResponse.SC_OK);
        resp.getWriter().println(response);

    }

    /**
     * Queue full logic.
     *
     * @param resp the resp
     * @throws IOException Signals that an I/O exception has occurred.
     */
    private static void queueFullLogic(HttpServletResponse resp) throws IOException {
        // TODO Auto-generated method stub
        String response = "Message Queue full";
        resp.setContentType("text/html");
        resp.setStatus(HttpServletResponse.SC_OK);
        resp.getWriter().println(response);

    }

    /**
     * Gets the payload.
     *
     * @param req the req
     * @return the payload
     * @throws IOException Signals that an I/O exception has occurred.
     */
    private static String getPayload(HttpServletRequest req) throws IOException {
        InputStream is = req.getInputStream();
        StringWriter writer = new StringWriter();
        try {
            IOUtils.copy(is, writer);
        } catch (IOException e1) {
            log.catching(e1);
        } finally {
            try {
                is.close();
            } catch (IOException e1) {
                log.catching(e1);
            }
        }

        final String payload = writer.toString();
        return payload;
    }

    /**
     * Process http request.
     *
     * @param payload the payload
     * @param ussdAppUrl the ussd app url
     * @param dialogListenerInstance the dialog listener instance
     */
    static void processHttpRequest(final String payload, final String ussdAppUrl,
            final DialogListener dialogListenerInstance) {
        log.entry();
        try {

            EventsSerializeFactory eventsSerializeFactory = null;

            try {
                eventsSerializeFactory = new EventsSerializeFactory();
            } catch (XMLStreamException e) {
                // TODO Auto-generated catch block
                log.catching(e);
            }
            Dialog dialog = null;
            try {
                dialog = eventsSerializeFactory.deserialize(payload.getBytes());
            } catch (XMLStreamException e) {

                log.catching(e);
            }

            MAPDialogSupplementary mapDialogSupplementary = null;

            switch (dialog.getMAPMessage().getMessageType()) {

            case unstructuredSSRequest_Request:

                UnstructuredSSRequest unstructuredSSRequestInd = null;
                unstructuredSSRequestInd = (UnstructuredSSRequest) dialog.getMAPMessage();
                unstructuredSSRequestInd.setInvokeId(1);
                mapDialogSupplementary = unstructuredSSRequestInd.getMAPDialog();

                try {
                    dialogListenerInstance.addUnstructuredSSRequestNetworkInitiated(unstructuredSSRequestInd,
                            mapDialogSupplementary, ussdAppUrl, dialog);
                } catch (Exception e1) {
                    // TODO Auto-generated catch block
                    log.catching(e1);
                }

            case unstructuredSSNotify_Request:

                UnstructuredSSNotifyRequest unstructuredSSNotifyRequest = (UnstructuredSSNotifyRequest) dialog
                        .getMAPMessage();

                mapDialogSupplementary = unstructuredSSNotifyRequest.getMAPDialog();

                unstructuredSSNotifyRequest.setInvokeId(1);
                try {
                    dialogListenerInstance.addUnstructuredSSNotifyRequest(unstructuredSSNotifyRequest,
                            mapDialogSupplementary, ussdAppUrl, dialog);
                } catch (MAPException e) {
                    log.catching(e);
                }
                break;
            default:
                log.info(String.format("Unknown message: %s", dialog));
                break;
            }
        } catch (Exception e) {
            log.catching(e);
        } finally {
            GlobalNetworkInitiatedSemaphore.getInstance().getSemaphore().release();
        }
        log.exit();
    }

}