将“requests_html”与“FastAPI”一起使用

Question

我正在尝试使用 requests_html 库和 js 渲染以及 FastAPI：

脚本.py

from fastapi import FastAPI
from requests_html import HTMLSession

app = FastAPI()

@app.get('/')
def func():
    with HTMLSession() as session:
        r = session.get('https://stackoverflow.com')
        r.html.render()
        return r.text

使用uvicorn script:app --reload 运行并访问http://127.0.0.1:8000/ 时 ，我收到以下错误：

...
 r.html.render()
  File "c:\users\a\appdata\local\programs\python\python37\lib\site-packages\requests_html.py", line 586, in render
    self.browser = self.session.browser  # Automatically create a event loop and browser
  File "c:\users\a\appdata\local\programs\python\python37\lib\site-packages\requests_html.py", line 727, in browser
    self.loop = asyncio.get_event_loop()
  File "c:\users\a\appdata\local\programs\python\python37\lib\asyncio\events.py", line 644, in get_event_loop
    % threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'ThreadPoolExecutor-0_0'.

知道如何让它们一起工作吗？

Answer 1

你必须在 Uvicorn 中使用 AsyncHTMLSession

from fastapi import FastAPI
from requests_html import AsyncHTMLSession

app = FastAPI()

@app.get('/')
async def func():
    asession = AsyncHTMLSession()
    r = await asession.get('https://stackoverflow.org/')

    await r.html.arender()

    return r.text