首页 > 解决方案 > 无法使用 Python 和 geckodriver 在 Raspbian 下运行 selenium-webdriver

问题描述

我试图让 selenium 在树莓派上以无头模式运行。我的脚本在我的 Windows 机器上运行良好,但我无法让这个特定的组合正常工作:

首先我按照文档selenium-server-standalone中的描述启动:

$ java -jar selenium-server-standalone-3.141.59.jar &
[1] 1842
14:39:26.881 INFO [GridLauncherV3.parse] - Selenium server version: 3.141.59, revision: e82be7d358
14:39:27.321 INFO [GridLauncherV3.lambda$buildLaunchers$3] - Launching a standalone Selenium Server on port 4444
2019-06-30 14:39:27.589:INFO::main: Logging initialized @2114ms to org.seleniumhq.jetty9.util.log.StdErrLog
14:39:28.755 INFO [WebDriverServlet.<init>] - Initialising WebDriverServlet
14:39:29.174 INFO [SeleniumServer.boot] - Selenium Server is up and running on port 4444

然后我在 Python 中运行以下测试脚本:

from selenium import webdriver
from selenium.webdriver.firefox.options import Options
from pyvirtualdisplay import Display

display = Display(visible=0, size=(800, 800))
display.start()

options = Options()
options.headless = True
driver = webdriver.Firefox(options=options)
driver.get("http://google.com/")
driver.quit()

我收到以下错误消息:

Traceback (most recent call last):
  File "debug3.py", line 10, in <module>
    driver = webdriver.Firefox(options=options)
  File "/usr/local/opt/python37/lib/python3.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 174, in __init__
    keep_alive=True)
  File "/usr/local/opt/python37/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
    self.start_session(capabilities, browser_profile)
  File "/usr/local/opt/python37/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "/usr/local/opt/python37/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/usr/local/opt/python37/lib/python3.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: connection refused

根据这个线程,我包括pyvirtualdisplay. 但结果并没有太大的不同。线程中的代码也不起作用。

标签: pythonseleniumselenium-webdriverraspbiangeckodriver

解决方案


我发现了问题,这是三个错误的组合:

  1. 无需单独运行 selenium-server-standalone
  2. 我没有使用正确版本的 geckodriver,raspbian 不需要最新版本的 Firefox/Iceweasel。Mozilla 52 的正确版本是 geckodriver 0.17 兼容版本列表在这里,geckodriver 的版本在这里
  3. xvfb / pyvirtualdisplay 不是必需的

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