Lecture 15 - [Backend 2] Introduction to Backend Development¶

Topics to learn¶

Must Needed

• API Design
• REST API
• GraphQL
• gRPC

• SOAP (less than 1%)

• Web Socket (really tough to scale)

• Message Broker (Not beginner friendly concept)

• API Security
• JWT Token
• Refresh Token

• OAuth2

• SAML

• Identity Providers (Cognito, Auth0, Firebase, Okta)

• Role Based Authorization
• API Testing
• Unit Testing
• Acceptance Testing
• Load Testing
• API Documentation
• Swagger
• Postman

To learn above 4 topics we need to learn some another topics:

• Database
• NoSQL
  • MongoDB
  • AWS DynamoDB
• SQL
  • PostgreSQL
  • MySQL
  • MSSQL / Oracle
• In Memory*
  • Redis*
  • Mem Cached
• Graph Database
  • Neo4j
• Linux Server
• Cloud Computing
• DevOps

Server Application Responsibilities¶

• Listen Request
• Always Same
• Process
• Algorithm
• Data Structure
• Database
• Problem Solving
• CRUD
• Response
• Always Same

HTTP (Hypertext Transfer Protocol)¶

• GET - want to read data from server
• POST - create new data
• PUT/PATCH - update existing content
• DELETE - delete data from database

Routing Pattern¶

• GET Everything - /books
• Get one book - /books/bookId
• POST new book - /books
• Update Book - /books/bookId
• Delete Book - /book/booksId

Pipeline¶

REQUEST -> MIDDLEWARE[logger, body parser, file parser, user ip, block ip, authentication, authorization, validation] -> CONTROLLER (Business Logic) -> MIDDLEWARE[error handler] -> RESPONSE

References¶

• ExpressJS API References
• Source Code

Tasks¶

Complete the playlist Express Js Crash Course In Bangla

Next week planning¶

• We will create our first working REST API.