During usage of pyppeteer for controlling the Chromium I have been receiving an error approximately after 20 seconds of work:
pyppeteer.errors.NetworkError: Protocol Error (Runtime.callFunctionOn): Session closed. Most likely the page has been closed.
As described here the issue is probably caused by implementation of python websockets>=7 package and by its usage within pyppeteer.
There are 3 solutions to prevent disconnection from Chromium:
- Patching the code like described here (preferable):
Run the snippet before running any other Pyppeteer commands
def patch_pyppeteer():
import pyppeteer.connection
original_method = pyppeteer.connection.websockets.client.connect
def new_method(*args, **kwargs):
kwargs['ping_interval'] = None
kwargs['ping_timeout'] = None
return original_method(*args, **kwargs)
pyppeteer.connection.websockets.client.connect = new_method
patch_pyppeteer()
- Change the trouble making library:
Downgrade websockets package to websockets-6.0 e.g via
pip3 install websockets==6.0 --force-reinstall (in your virtual environment)
- Change the code base as described in this pull request, which will be hopefully merged soon.