What?
client side data
memory cookie & disc cookie
Why?
Http server is statless, use user side data storage can help server to understant the client request state
How?
Cookie is sent to server in all Http reqeust
- good:
- Help to know user's state
- can be used as local cache
- bad
- 4 KB max, not enough for complicated struture
- sent every http requests
- user can clean cookies
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