HTTP

HTTP - Hypertext Transfer Protocol.

• Protocol - used to transfer HyperText.
• Protocol - set of rules.
• HyperText - Hyperlink Text.
• Hyperlink - Web Docs.

Huaman Readable

• Network tab visibility.
• Inspect Element.
• Page Source.

State less Protocal

• Everytime you visite a page, you are a new user.
• No memory of previous request.

Session

• Stored state b/w Frontend & Backend.

Cookic

• I need to send more info from Server to Browser.

HTTP Headers

• Client.
• Browser Info.
• Date Time.
• Ciikie to Store.

Request Response Model

• Type of Request [Get,Post,Delete...]
• Response Code [200,404,500.....]
  • What action to perform get pot
  • Where to perform http://api.kuntal.ai/auth
  • Was it done 200,400.....

HTTP/2

• http means http 2
  • http/1.1 is a fallback & is still used.
• Uses compression
• Use multiplexing (Many files at same time)
• Uses encryption (https)
  • In aws, we don't use https for internal communication.

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• User Agent - (Browser).
• TCP - Transmission Control Protocol.
• FTP - File Transfer Protocol.
• IP - Internet Protocol.
• TLS - Transpost Layer Security.
• URL - Uniform Resource Locator.
• DNS - Domain Name System (Server).
  • Points URL to IP.
• Header - Pass additional information.
• Payload - Acual Data - email,password.
• Cache - Store the Data (Memory).

Summary:

• Setup TCP Connection.
• Exchange TLS Certificate.(HTTPS).
• Send verb + URL ---> Data + Header Info.
• Gets the response back with status code & Data (Inage,CSV,Text ).
• TCP Connection is closed (State less).