User-server interaction: cookies

• server sends “cookie” to client in response msg

  Set-cookie: 1678453
  

• client presents cookie in later requests

  cookie: 1678453
  

• server matches presented-cookie with server-stored info

  • authentication
  • remembering user preferences, previous choices

client

server

usual http request msg

usual http response +

Set-cookie: #

cookie-

spectific

action

cookie-

spectific

action

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