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The Episodes API - Code, Config and Start

In this part we will explore the Episodes Api code and configuration.

The api is based on the previous examples like ex-10. We will only focus on the significant parts. The api resides in ex-11/got-episodes-api.

The Code

Steps:

  • Observe highlights in changes to the episodes code (ex-10 vs. ex-11)
    (Optional - Diff using VSCode)

    ./bin/src-diff.sh

  • App config (./lib/app-config.js)

    • Make EPISODES_API_URI config dynamic, read from the environment
    • Make QUOTES_API_URL config dynamic, read from the environment
    • Make QUOTES_API_URI config dynamic, read from the environment
    • Add CLIENT_SECRET config dynamic, read from the environment
    • Add CLIENT_ID config dynamic, read from the environment
    • Enhance logic that verify config

  • The Quotes worker (./lib/quotes.js)

    • One function to get new access token for quotes using OBO
    • One function to request a quote with the new access token

--Now You--

  • Inspect the steps above and identify the changes to config
  • Investigate the Quotes worker code

The Config

  • The episodes env file (appsec-course-api-episodes-eq.env) needs to be updated with new config

  • Open appsec-course-api-episodes-eq.env

    code $HOME/envs/appsec-course-api-episodes-eq.env

  • Add following config

    export NODE_ENV="development"
export TENANT_ID=""
export CLIENT_ID=""
export CLIENT_SECRET=''
export EPISODES_API_URI=""
export QUOTES_API_URL="http://localhost:3200"
export QUOTES_API_URI=""
export PORT=3100

  • Add this config - explore the Microsoft Entra ID App registrations to find the proper values.

    • Hint: You may have to create a new value for the secret, see exercise 1

  • Explore the Microsoft Entra ID App registrations to find the proper values.

    • Hint: You may have to create a new value for the secret

--Now You--

  • Do the steps above and update the config

Start the Episodes APi

Steps:

(Assuming you are in a terminal window at ./ex-11/got-episodes-api)

  • Install dependencies

    npm install

  • Execute tests

    npm test

  • Source the configuration file

    source ~/envs/appsec-course-api-episodes-eq.env

  • Run the application

    npm start

  • Verify that the application is running at port 3100

--Now You--

  • Do the steps above and verify that the API is running