16。FastAPIsession

　　16.FastAPI session
　　在FastAPI中，要使用session，实际上是使用Starlette Session，Starlette Session是作为一个中间件存在的，所以需要安装Starlette Session。执行命令： pip install starlette-session 16.1使用Redis作为session存储
　　代码如下： from fastapi import FastAPI from redis import Redis from starlette_session import SessionMiddleware from starlette_session.backends import BackendType  app = FastAPI()  redis_client = Redis(host=＂127.0.0.1＂, port=6379, password=＂xxxxxx＂)  app.add_middleware(     SessionMiddleware,     secret_key=＂secret＂,     cookie_name=＂cookie22＂,     backend_type=BackendType.redis,     backend_client=redis_client )16.2使用Redis Cluster作为session存储
　　代码如下： from fastapi import FastAPI from rediscluster import RedisCluster from starlette_session import SessionMiddleware from starlette_session.backends import BackendType  app = FastAPI()  redis_client = RedisCluster(host=＂127.0.0.1＂, port=6381, password=＂xxxxxx＂)  app.add_middleware(     SessionMiddleware,     secret_key=＂secret＂,     cookie_name=＂cookie22＂,     backend_type=BackendType.redis,     backend_client=redis_client )16.3操作session
　　在FastAPI中，操作session可以通过request对象直接进行操作，假设对象名为request，则： request.session.update()设置session，参数为字典 request.session.clear() 清除session request.session读取session
　　代码如下： from fastapi import FastAPI from fastapi import Request from rediscluster import RedisCluster from starlette_session import SessionMiddleware from starlette_session.backends import BackendType  app = FastAPI()  redis_client = RedisCluster(host=＂127.0.0.1＂, port=6381, password=＂jane10181010＂)  app.add_middleware(     SessionMiddleware,     secret_key=＂secret＂,     cookie_name=＂cookie22＂,     backend_type=BackendType.redis,     backend_client=redis_client )  @app.get(path=＂/set＂) async def set(request: Request):     request.session.update({＂uid＂: ＂10181010＂})     return {＂res＂: True}  @app.get(path=＂/cls＂) async def cls(request: Request):     request.session.clear()     return {＂res＂: True}  @app.get(path=＂/get＂) async def get(request: Request):     return {＂session＂: request.session}
　　执行请求： curl http://127.0.0.1:8000/set -i HTTP/1.1 200 OK date: Tue, 18 Jan 2022 02:20:00 GMT server: uvicorn content-length: 12 content-type: application/json set-cookie: cookie22=eyJfY3NzaWQiOiAiOGExMDJiM2UtZjJiNS00ZmVmLWJhZWEtYWM5YjI4ZWQ1N2JlIn0=.YeYj0Q.UCFZKi3jalMw0SknLsmM_RYpSj0; Path=/; Max-Age=1209600; httponly; samesite=lax  {＂res＂:true}  curl http://127.0.0.1:8000/get --cookie ＂cookie22=eyJfY3NzaWQiOiAiOGExMDJiM2UtZjJiNS00ZmVmLWJhZWEtYWM5YjI4ZWQ1N2JlIn0=.YeYj0Q.UCFZKi3jalMw0SknLsmM_RYpSj0; Path=/; Max-Age=1209600; httponly; samesite=lax＂ -i HTTP/1.1 200 OK date: Tue, 18 Jan 2022 02:20:26 GMT server: uvicorn content-length: 30 content-type: application/json set-cookie: cookie22=eyJfY3NzaWQiOiAiOGExMDJiM2UtZjJiNS00ZmVmLWJhZWEtYWM5YjI4ZWQ1N2JlIn0=.YeYj6w.H2gL6V-BTq4ePB9gaTg-3fAt5r0; Path=/; Max-Age=1209600; httponly; samesite=lax  {＂session＂:{＂uid＂:＂10181010＂}}  curl http://127.0.0.1:8000/cls --cookie ＂cookie22=eyJfY3NzaWQiOiAiOGExMDJiM2UtZjJiNS00ZmVmLWJhZWEtYWM5YjI4ZWQ1N2JlIn0=.YeYj0Q.UCFZKi3jalMw0SknLsmM_RYpSj0; Path=/; Max-Age=1209600; httponly; samesite=lax＂ -i HTTP/1.1 200 OK date: Tue, 18 Jan 2022 02:20:48 GMT server: uvicorn content-length: 12 content-type: application/json set-cookie: cookie22=null; Path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT; Max-Age=0; httponly; samesite=lax  {＂res＂:true}  curl http://127.0.0.1:8000/get --cookie ＂cookie22=eyJfY3NzaWQiOiAiOGExMDJiM2UtZjJiNS00ZmVmLWJhZWEtYWM5YjI4ZWQ1N2JlIn0=.YeYj0Q.UCFZKi3jalMw0SknLsmM_RYpSj0; Path=/; Max-Age=1209600; httponly; samesite=lax＂ -i HTTP/1.1 200 OK date: Tue, 18 Jan 2022 02:20:53 GMT server: uvicorn content-length: 16 content-type: application/json set-cookie: cookie22=null; Path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT; Max-Age=0; httponly; samesite=lax  {＂session＂:null}