Python Selenium虚拟显示运行Firefox驱动遇连接拒绝问题求助

Hey there, let's work through this connection refused error together—since you're using older versions of Firefox and geckodriver, there are several targeted fixes to try:

• Verify geckodriver setup & compatibility
  Geckodriver 0.19.1 is technically compatible with Firefox 52.x, but you need to make sure it's properly configured:

  • Specify the full path to geckodriver when initializing the driver (this avoids PATH-related issues):
    driver = webdriver.Firefox(firefox_profile=ffprofile, executable_path='/path/to/your/geckodriver')
  • Ensure geckodriver has executable permissions: run chmod +x /path/to/your/geckodriver (for Linux/macOS systems).

• Tweak FirefoxProfile for older versions
  Older Firefox builds need specific preferences to play nice with geckodriver. Add these lines to your profile setup:

  ffprofile.set_preference("marionette.enabled", True)
  ffprofile.set_preference("network.dns.disableIPv6", True)
  

  The first ensures Marionette (the protocol linking Firefox and geckodriver) is enabled, while the second avoids potential DNS resolution conflicts that can cause connection failures.

• Check pyvirtualdisplay dependencies
  Pyvirtualdisplay relies on Xvfb to create a virtual display. Make sure Xvfb is installed on your system:

  • For Ubuntu/Debian: sudo apt-get install xvfb
  • For CentOS/RHEL: sudo yum install xorg-x11-server-Xvfb
    You can also try specifying a unique display number when starting the virtual display to avoid conflicts with other processes:
    display = Display(visible=0, size=(800, 600), display_num=10)

• Improve resource cleanup in your code
  Your original code doesn't guarantee proper cleanup of the driver or virtual display if an error occurs. Update your code to use a finally block to ensure resources are released:

  from selenium import webdriver
  from selenium.webdriver import FirefoxProfile
  from pyvirtualdisplay import Display
  
  display = None
  driver = None
  try:
      display = Display(visible=0, size=(800, 600))
      display.start()
      
      ffprofile = FirefoxProfile()
      ffprofile.set_preference("dom.webnotifications.enabled", False)
      ffprofile.set_preference("marionette.enabled", True)
      ffprofile.set_preference("network.dns.disableIPv6", True)
      
      # Replace with your geckodriver path
      driver = webdriver.Firefox(firefox_profile=ffprofile, executable_path='/usr/local/bin/geckodriver')
      driver.get('https://www.91mobiles.com')
      print(driver.current_url)
  except Exception as e:
      print(f"Error: {str(e)}")
  finally:
      if driver:
          driver.quit()  # Use quit() instead of close() to fully terminate the driver
      if display:
          display.stop()
  

• Test without virtual display first
  To rule out pyvirtualdisplay as the cause, temporarily remove the display-related code and run the script directly. If Firefox launches and loads the page successfully, the issue is isolated to the virtual display setup—double-check Xvfb installation and display configuration in that case.

内容的提问来源于stack exchange，提问作者Maccaroni