Fastapi(Starlette)重定向到POST而不是GET方法 [英] fastapi (starlette) RedirectResponse redirect to post instead get method
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问题描述
我在返回RedirectResponse对象后遇到奇怪的重定向行为
events.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=
{
...
}
)
routers.py
api_router = APIRouter()
...
api_router.include_router(events.router, prefix="/event")
此代码返回结果
127.0.0.1:37772 - "POST /event/22 HTTP/1.1" 405 Method Not Allowed
我按照建议添加状态
redirect_url = request.url_for('get_event', **{'pk': event['id']}, status_code=status.HTTP_302_FOUND)
并获取
starlette.routing.NoMatchFound
对于实验，我将@router.get('/{pk}', response_model=EventSingle)更改为@router.post('/{pk}', response_model=EventSingle)
并且重定向成功完成，但是POST请求不适合我这里。我做错了什么？
更新
用于运行事件/创建逻辑的html表单
base.html
<form action="{{ url_for('event_create')}}" method="POST">
...
</form>
base_view.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})
推荐答案
当您想要在发布后重定向到GET时，最佳做法是to redirect with a 303 status code，因此只需将代码更新为：
# ...
return RedirectResponse(redirect_url, status_code=303)
如您所见，redirecting with 307 keeps the HTTP method and body。
完整工作示例：
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")
若要运行，请安装pip install fastapi uvicorn并使用：
uvicorn --reload --host 0.0.0.0 --port 3000 example:app
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