Expirations check app

Built with technologies:

• Serverless (specifically AWS, including Lambda, DynamoDb, SES, Cognito)

• Node.js - all AWS Lambda functions

• WebApp/API made with Express, and Handlebars (and again Node.js and AWS-SDK)

• WebApp is made with Vue.js, bundled with Webpack

• Has GoogleAnalytics support, as well as custom webview for its results (the ./analytics folder)

• Has CLI functionalities (for API interactions, JWT generation, database migrations)

• Has Flutter app (one as simple Web wrapper, another one with native widgets)

For the Webapp Lambda Function

It's used as a GUI for the API Lambda Function:

1. First build the client code (implemented with VueJS and Webpack)

   $ cd webapp
   $ npm run dev (or npm run build)

2. To test locally - two ways

   1. Start the local Express app instance 'app-local.js' with

      $ cd webapp
      $ node app-local

   2. Use serverless-offline plugin. It can be used to test all functions with HTTP events, not just the Webapp one

      $ sls offline start

      This assumes the webapp client-JS-bundle is prebuild

3. To develop

Start the dev scripts for the server and for the webapp client building, e.g.

npm run sls:dev

and

npm run client:dev

Deploy to AWS

$ sls deploy

Use of the CLI

$ node cli update --localHttp --id=ab18a7a0-5839-11e8-a4ce-a5f3659aa8fd --expire="Feb 17, 2019"

Securing with custom authorizer

Currently there's a bug in serverless-offline plugin that don't add the AWS_REGION environment variable to the authorizer handler. To fix locally until there's official fix: dherault/serverless-offline#491 Add in serverless-offline/src/createAuthScheme.js:

Object.assign(
            process.env,
            { AWS_REGION: serverless.service.provider.region });
        handler = functionHelper.createHandler(funOptions, options);

instead of just

        handler = functionHelper.createHandler(funOptions, options);

Securing with IAM (AWS Cognito and etc)

Implementing WebPush

Generate VAPID keys from https://web-push-codelab.glitch.me/

{"endpoint":"https://fcm.googleapis.com/fcm/send/e12xvK-vvl8:APA91bEjBZ9LK0_tQLe6LMgpAFWlgH7ywEjnkgY2ZUaqZGJiaUi1I5tKXNo7lk6Eol-2R7EZBGMk2_QnoDSyhmUezCdDQChSMg1JJc2UESO0CwDOvHjUfZjkIMl8VbhBx9V-XD0tCkiR","expirationTime":null,"keys":{"p256dh":"BOKbC14xD8QkVy5IL3yil19eKDGXqiYeMf4OqSu6MStFLxxrcOWA5ePudnkutVF1c3K-Hk71g5mg93d4wJ0VzFE","auth":"ZrTxsyab-sTRVbHom-3Wgg"}}

{"endpoint":"https://fcm.googleapis.com/fcm/send/cC1uRN4aN18:APA91bHQpMO3ZsICaCmE8dAcIvqKUKF5TmgnmkYkkjWZXjR9l2X60VAxLLN0r8PLwiplCdIjrC1Dn-ILi5IYvIsyuLWseSHjLKcHry-_WnMn48WYEP06-paAWem_JmBJyXeY6vYtFfCG","expirationTime":null,"keys":{"p256dh":"BM5gpGUiiUI7nc_M3YOwzzdFkSWACp8P6XJsyKI90ttMzGX4PNtL5pyNb_F7igdm_lv5hm8cExVj2z6hOqecUz8","auth":"OwzeGqcvw5_Q0rSTlEuXjA"}}