Jek*_*son 11 python starlette fastapi
返回 RedirectResponse 对象后，我遇到了奇怪的重定向行为
事件.py
router = APIRouter()
@router.post('/create', response_model=EventBase)
async def event_create(
request: Request,
user_id: str = Depends(get_current_user),
service: EventsService = Depends(),
form: EventForm = Depends(EventForm.as_form)
):
event = await service.post(
...
)
redirect_url = request.url_for('get_event', **{'pk': event['id']})
return RedirectResponse(redirect_url)
@router.get('/{pk}', response_model=EventSingle)
async def get_event(
request: Request,
pk: int,
service: EventsService = Depends()
):
....some logic....
return templates.TemplateResponse(
'event.html',
context=
{
...
}
)
路由器.py
api_router = APIRouter()
...
api_router.include_router(events.router, prefix="/event")
这段代码返回结果
127.0.0.1:37772 - "POST /event/22 HTTP/1.1" 405 Method Not Allowed
好的，我看到由于某种原因调用了 POST 请求而不是 GET 请求。我搜索解释并发现 RedirectResponse 对象默认为代码 307 并调用 POST链接
我遵循建议并添加状态
redirect_url = request.url_for('get_event', **{'pk': event['id']}, status_code=status.HTTP_302_FOUND)
并得到
starlette.routing.NoMatchFound
为了进行实验，我将更@router.get('/{pk}', response_model=EventSingle)改为@router.post('/{pk}', response_model=EventSingle)
并且重定向成功完成，但是 post 请求在这里不适合我。我究竟做错了什么？
UPD
用于运行事件/创建逻辑的 html 表单
基本.html
<form action="{{ url_for('event_create')}}" method="POST">
...
</form>
基本视图.py
@router.get('/', response_class=HTMLResponse)
async def main_page(request: Request,
activity_service: ActivityService = Depends()):
activity = await activity_service.get()
return templates.TemplateResponse('base.html', context={'request': request,
'activities': activity})
Eli*_*les 15
当您想在 POST 之后重定向到 GET 时，最佳实践是使用303状态代码进行重定向，因此只需将代码更新为：
# ...
return RedirectResponse(redirect_url, status_code=303)
正如您所注意到的，重定向307会保留 HTTP method 和 body。
from fastapi import FastAPI, APIRouter, Request
from fastapi.responses import RedirectResponse, HTMLResponse
router = APIRouter()
@router.get('/form')
def form():
return HTMLResponse("""
<html>
<form action="/event/create" method="POST">
<button>Send request</button>
</form>
</html>
""")
@router.post('/create')
async def event_create(
request: Request
):
event = {"id": 123}
redirect_url = request.url_for('get_event', **{'pk': event['id']})
return RedirectResponse(redirect_url, status_code=303)
@router.get('/{pk}')
async def get_event(
request: Request,
pk: int,
):
return f'<html>oi pk={pk}</html>'
app = FastAPI(title='Test API')
app.include_router(router, prefix="/event")
要运行，请安装pip install fastapi uvicorn并运行：
uvicorn --reload --host 0.0.0.0 --port 3000 example:app
然后，将浏览器指向：http://localhost:3000/event/form