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2022-2-14 learning xiangniuke project - Session Management
2022-07-03 09:10:00 【weixin_ thirty-seven million six hundred and eighty-two thousan】
HTTP Cookies Can solve stateless problems .
take Cookies Add to HTTP Head , Create a session , Let each request share the same context information
Try to make the server remember the browser , The server gives the browser a cookie, The next browser request will bring cookies Send to the server
demonstration cookie How to send the server to the client
function session/get
session advantage , Save to server , Security , shortcoming , The server is under a lot of pressure
Generally speaking , As far as possible with cookie
viscosity session, Each tour , Always visit and keep it sessionID Server for , problem : Unbalanced load
Session Sync , Whenever a server is created SessionID, Sync to other servers ,
problem : Spending big , Large coupling
share session, A certain server , Dedicated to storage session, When other servers need to get session when , Access to the server
problem : If responsible for storage session My server is down
Put it in the database , Perform cluster backup .
problem : Read database , Slow speed
Final plan : Put in redis in
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