[NODRIVER] [BUG] Exception on headless mode

[FRIKIdelTO]

System:
Chrome 132.0.6834.84 (Build oficial) (64 bits)
Windows 11 64bit (tested too on Windows 10 64bit)

test code:

import asyncio
import nodriver as uc

async def test_nodriver(url):
    browser = await uc.Browser.create(headless=True)
    tab = await browser.get(url)
    await tab
    html = await tab.get_content()
    browser.stop()
    return html

html = uc.loop().run_until_complete(test_nodriver('https://example.com'))
print(html)

traceback:

Traceback (most recent call last):
  File "D:\PYTHON\test_nodriver.py", line 12, in <module>
    html = uc.loop().run_until_complete(test_nodriver('https://example.com'))
  File "C:\python\lib\asyncio\base_events.py", line 642, in run_until_complete
    return future.result()
  File "D:\PYTHON\test_nodriver.py", line 5, in test_nodriver
    browser = await uc.Browser.create(headless=True)
  File "C:\python\lib\site-packages\nodriver\core\browser.py", line 90, in create
    await instance.start()
  File "C:\python\lib\site-packages\nodriver\core\browser.py", line 393, in start
    await self.connection.send(cdp.target.set_discover_targets(discover=True))
  File "C:\python\lib\site-packages\nodriver\core\connection.py", line 413, in send
    await self._prepare_headless()
  File "C:\python\lib\site-packages\nodriver\core\connection.py", line 492, in _prepare_headless
    response, error = await self._send_oneshot(
TypeError: cannot unpack non-iterable NoneType object

[stephanlensky]

Hi @FRIKIdelTO, I created a fork of nodriver here stephanlensky/zendriver which fixes this and other bugs, feel free to take a look.

[khamaileon]

I can confirm that the problem is resolved with Zendriver.

[mdmintz]

Until the maintainer of nodriver returns, I have a working fix in https://github.com/seleniumbase/SeleniumBase.
(The CDP Mode inside there includes a nodriver fork with fixes and improvements.)

Here's the updated script:

import asyncio
from seleniumbase.undetected import cdp_driver

async def main():
    browser = await cdp_driver.cdp_util.start_async(headless=True)
    tab = await browser.get("https://example.com")
    await tab
    html = await tab.get_content()
    browser.stop()
    return html

if __name__ == "__main__":
    loop = asyncio.new_event_loop()
    html = loop.run_until_complete(main())
    print(html)

There's also a sync format if you don't like using async/await.