Deno Web Development by Alexandre Portela Notes #book #webdev

deno-web-dev-notes.md

Deno Web Development by Alexandre Portela Notes

• Architecture
  • Create a top level index.ts file for entry point
  • Create a top level deps.ts file for dependencies and use this file to generate a lock file
  • Every data object has its own folder
    • repository folder for in memory or database
    • controller.ts for main operations
    • index.ts for export

      export type MyType = ...
      export interface MyInterface = {
        myfunction: (arg types) => output types
        ...
      }
      

    • types.ts for types needed around the module
  • Create a folder web for the API routes
  • Create a folder config for the file configuration
    • Uses a YAML file in the top level to specify visible config
    • Uses environmental variables to set secret config
• Code notes
  • Use Pick<Class, "member1" | "member2"> and Omit<Class, "member3"> to create classes that are subsets
• Lock files: will check a downloaded packages integrity
  • Creating a lock file

    deno cache --lock=lock.json --lock-write src/deps.ts
    

  • Using the lock file

    deno cache --lock=lock.json src/deps.ts
    

  • Add a dependency, reload the cache

    deno cache --lock=lock.json --reload --lock-write src/deps.ts
    

• Curl
  • Example commands

      curl -X POST -d '{"username": "audrow", "password": "testpw" }' -H 'Content-Type: application/json' http://localhost:8080/api/users/register
    

    curl -X POST -d '{"username": "audrow", "password": "testpw" }' -H 'Content-Type: application/json' http://localhost:8080/api/login
    

• JSON Web Tokens (JWT) a way of keeping users in by giving them a temporary token to confirm that they are logged in
• Benchmarking
  • Use the bench command and run it
  • Use high resolution time to make it more accurate

    deno run --allow-hrtime --unstable src/users/utilBenchMarks.ts