HTTP.md

HTTP Basics

Hyper Text Transfer Protocol

• Based on request/response stateless protocol.
  • Client opens connection to server
  • Client sends HTTP request for a resource
  • Server sends HTTP response to the client (w/resource)
  • Client closes connection to server

URN: Uniform Resource Name

• Uniquely identifies resource or name of resource
• Does not tell us how to get the resource

example "HTML/CSS/JavaScript/Web Developer/Musa/Toktas"

URI: Uniform Resource Identifier

URL: Uniform Resource Locator

Http Methods

• GET
  • Retrieves the resource
  • Data is passed to server as part of the URI
  • I.e., query string
• POST
  • Sends data to server in order to be processed
  • Data is sent in the message body

Some Response Status Codes

• 200 Ok
• 404 Not Found
• 403 Forbidden
• 500 Internal Server Error