I'm trying to use my Firefox v109 with Selenium using Chrome Devtools Protocol. I started Firefox like this:
$ firefox --remote-debugging-port=2137
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
[GFX1-]: glxtest: VA-API test failed: failed to initialise VAAPI connection.
WebDriver BiDi listening on ws://127.0.0.1:2137
DevTools listening on ws://127.0.0.1:2137/devtools/browser/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
Then I used the following code:
import logging
import argparse
parser = argparse.ArgumentParser()
parser.add_argument("--session-id", required=True)
parser.add_argument("-p", "--port", type=int, required=True)
args = parser.parse_args()
logging.basicConfig(level=logging.DEBUG)
import selenium.webdriver
# https://stackoverflow.com/q/37963785/1091116
class SessionRemote(selenium.webdriver.Remote):
def start_session(self, desired_capabilities, browser_profile=None):
# Skip the NEW_SESSION command issued by the original driver
# and set only some required attributes
self.w3c = True
caps = selenium.webdriver.DesiredCapabilities.FIREFOX
command_executor = f"127.0.0.1:{args.port}"
driver = SessionRemote(command_executor=command_executor, desired_capabilities=caps)
driver.session_id = args.session_id
driver.get("https://google.com")
Here's how I executed it and what the output was:
> python3 a.py -p 2137 --session-id xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
/tmp/strace/a.py:24: DeprecationWarning: desired_capabilities has been deprecated, please pass in an Options object with options kwarg
driver = SessionRemote(command_executor=command_executor, desired_capabilities=caps)
DEBUG:selenium.webdriver.remote.remote_connection:POST 127.0.0.1:2137/session/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/url {"url": "https://google.com"}
DEBUG:urllib3.connectionpool:Starting new HTTP connection (1): 127.0.0.1:2137
DEBUG:urllib3.connectionpool:http://127.0.0.1:2137 "POST /session/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/url HTTP/1.1" 404 611
DEBUG:selenium.webdriver.remote.remote_connection:Remote response: status=404 | data=<html> <head><title>404 Not Found</title></head> <body> <h1>404 Not Found</h1> <p> <span style='font-family: monospace;'>/session/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/url</span> was not found. </p> </body> </html> | headers=HTTPHeaderDict({'content-type': 'text/html;charset=utf-8', 'connection': 'close', 'server': 'httpd.js', 'date': 'Tue, 31 Jan 2023 15:58:52 GMT', 'content-length': '611'})
DEBUG:selenium.webdriver.remote.remote_connection:Finished Request
Traceback (most recent call last):
File "/tmp/strace/a.py", line 26, in <module>
driver.get("https://google.com")
File "/home/d33tah/virtualenv/lib/python3.10/site-packages/selenium/webdriver/remote/webdriver.py", line 449, in get
self.execute(Command.GET, {"url": url})
File "/home/d33tah/virtualenv/lib/python3.10/site-packages/selenium/webdriver/remote/webdriver.py", line 440, in execute
self.error_handler.check_response(response)
File "/home/d33tah/virtualenv/lib/python3.10/site-packages/selenium/webdriver/remote/errorhandler.py", line 209, in check_response
raise exception_class(value)
selenium.common.exceptions.WebDriverException: Message: <html> <head><title>404 Not Found</title></head> <body> <h1>404 Not Found</h1> <p> <span style='font-family: monospace;'>/session/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/url</span> was not found. </p> </body> </html>
What am I doing wrong? One thing that's confusing to me is that Firefox passes a websocket URI while selenium is trying to use HTTP instead.
