• what are http headers?
  • metadata - key-value pairs sent with requests and responses
  • used in caching,authntication, managing stat

HTTP Methods

• basic set of operations that can be used to interact with resources on a server.

  • GET: Retrieve data from the server.
  • HEAD: Similar to GET, but only retrieves the headers without the body.
  • OPTIONS: Describe the communication options for the target resource.
  • TRACE: Perform a message loop-back test along the path to the target resource.
  • POST: Send data to the server to create a new resource.
  • PUT: Update an existing resource on the server.
  • DELETE: Remove a resource from the server.
  • PATCH: Apply partial modifications to a resource.

HTTP Status Codes

• 1xx: Informational responses (e.g., 100 Continue).
• 2xx: Successful responses (e.g., 200 OK, 201 Created).
• 3xx: Redirection messages (e.g., 301 Moved Permanently, 302 Found).
• 4xx: Client error responses (e.g., 400 Bad Request, 404 Not Found).
• 5xx: Server error responses (e.g., 500 Internal Server Error, 502 Bad Gateway).