fastapi session 如何保存sessionid

在 FastAPI 中，您可以使用 `fastapi.session` 模块来处理会话管理。默认情况下，FastAPI 使用基于 Cookie 的会话存储机制。这意味着会话 ID 将存储在浏览器的 Cookie 中，并在每个请求中发送回服务器。

要手动保存会话 ID，您可以使用以下代码：

from fastapi import FastAPI, Request, Response, Depends
from fastapi.responses import HTMLResponse
from fastapi.security import OAuth2PasswordRequestForm
from fastapi import FastAPI, HTTPException, status
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from fastapi import FastAPI, Depends, HTTPException, status
from fastapi.security import HTTPBasic, HTTPBasicCredentials

app = FastAPI()

# Create session
@app.post("/login")
async def login(response: Response, form_data: OAuth2PasswordRequestForm = Depends()):
    # Your authentication logic here
    # ...
    # Set session ID in a response cookie
    response.set_cookie(key="session_id", value="my_session_id")
    return {"message": "Logged in successfully"}


# Use session
@app.get("/protected")
async def protected_session(session_id: str = Depends(get_session)):
    # Your protected route logic here
    # ...
    return {"message": "This is a protected route"}

# Get session
async def get_session(request: Request):
    session_id = request.cookies.get("session_id")
    if session_id is None:
        raise HTTPException(status_code=401, detail="Session ID not found")
    return session_id

在这个例子中，我们首先在登录路由中设置了一个名为“session_id”的 Cookie，然后在受保护的路由中使用 `get_session` 函数来获取 Cookie 中的会话 ID。如果会话 ID 不存在，我们将引发 HTTPException。