ai.nitro.bot4j.integration.alexa.receive.webhook.impl.AlexaWebhookImpl.java Source code

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Here is the source code for ai.nitro.bot4j.integration.alexa.receive.webhook.impl.AlexaWebhookImpl.java

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/*
 * Copyright (C) 2016, nitro.ai
 * All rights reserved.
 *
 * This software may be modified and distributed under the terms
 * of the BSD 3-clause license. See the LICENSE file for details.
 */

package ai.nitro.bot4j.integration.alexa.receive.webhook.impl;

import java.io.IOException;

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

import org.apache.commons.io.IOUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import com.amazon.speech.Sdk;
import com.amazon.speech.speechlet.authentication.SpeechletRequestSignatureVerifier;

import ai.nitro.bot4j.integration.alexa.receive.AlexaReceiveHandler;
import ai.nitro.bot4j.integration.alexa.receive.webhook.AlexaWebhook;

public class AlexaWebhookImpl implements AlexaWebhook {

    //static Logger LOG = LogManager.getLogger(AlexaWebhookImpl.class);

    @Inject
    protected AlexaReceiveHandler alexaReceiveHandler;

    @Override
    public String post(final HttpServletRequest req, final HttpServletResponse res) throws IOException {
        String result = "";

        try {
            final byte[] serializedSpeechletRequest = IOUtils.toByteArray(req.getInputStream());

            SpeechletRequestSignatureVerifier.checkRequestSignature(serializedSpeechletRequest,
                    req.getHeader(Sdk.SIGNATURE_REQUEST_HEADER),
                    req.getHeader(Sdk.SIGNATURE_CERTIFICATE_CHAIN_URL_REQUEST_HEADER));

            final byte[] outputBytes = alexaReceiveHandler.handleSpeechletRequest(serializedSpeechletRequest);
            result = new String(outputBytes);
        } catch (final IOException e) {
            //LOG.warn(e.getMessage(), e);
        } catch (final SecurityException e) {
            final int statusCode = HttpServletResponse.SC_BAD_REQUEST;
            //LOG.error("Exception occurred in doPost, returning status code {}", statusCode, e);
            res.sendError(statusCode, e.getMessage());
        }

        return result;
    }

}