モジュール 3:サーバーレスバックエンドを構築する

// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

const AWS = require('aws-sdk');
const appstream = new AWS.AppStream;
const ses = new AWS.SES();

exports.handler = (event, context, callback) => { //Event should contain the Name, Email and AWS Account ID

    var eventdata = JSON.parse(event.body); //Parses the JSON from the event body 
    var params = {
        ImagePermissions: { /* required */
            allowFleet: true, //Boolean
            allowImageBuilder: true //Boolean
        },
        Name: '<IMAGE_NAME>', /* required */
        SharedAccountId: eventdata.account //AWS Account ID parsed from the JSON body
    };

    shareas2image(params, eventdata, context.awsRequestId, callback); //Share image function call

};

function errorResponse(errorMessage, awsRequestId, callback) { //Function for handling error messaging back to client 
    callback(null, {
        statusCode: 500,
        body: JSON.stringify({
            Error: errorMessage, 
            Reference: awsRequestId,
        }),
        headers: {
            'Access-Control-Allow-Origin': '<origin-domain>', //This should be the domain of the website that originated the request, example: amazonaws.com
        },
    });
}

function shareas2image(params, eventdata, awsRequestId, callback) {
    var request = appstream.updateImagePermissions(params);
    request.
        on('success', function (response) {
            console.log("Success. " + JSON.stringify(response.data));
            sendEmail(eventdata);
            callback(null, {
                statusCode: 201,
                body: JSON.stringify({
                    Message: "Success",
                    Reference: awsRequestId,
                }),
                headers: {
                    'Access-Control-Allow-Origin': '<origin-domain>', //This should be the domain of the website that originated the request, example: amazonaws.com
                },
            });
        }).
        on('error', function (response) {
            console.log("error: " + JSON.stringify(response.message));
            errorResponse('Error sharing AS2 Image.', awsRequestId, callback);

        }).
        send();


}

function sendEmail(data) {
    var sender = "<sender@example.com>"; //Sender needs to be a verified address in SES
    var receiver = data.email.trim(); /*Trim the string of any preceding and trialing whitespaces*/
    var name = data.name.trim();
    var params = {
        Destination: {
            ToAddresses: [receiver]
        },
        Message: {
            Body: {
                Text: {
                    Data: 'Hello ' + name + ',' + '\n\nThank you for trying Example Corp\'s Application Suite. We have shared a preconfigured AppStream 2.0 image with all of Example Corp\'s applications to your AWS Account.',
                    Charset: 'UTF-8'
                }
            },
            Subject: {
                Data: 'Thank you for trying Example Corp ' + name,
                Charset: 'UTF-8'
            }
        },
        Source: sender
    };
    console.log("Sending Email.");
    ses.sendEmail(params, function (err, data) {
        if (err) console.log(err, err.stack); // an error occurred
        else console.log(data);           // successful response
    });
}