能否用Python Selenium WebDriver设置代理链，结合Tor与BrowserMob-Proxy改指纹？

1. Can we set up a proxy chain with Python Selenium WebDriver? #

Absolutely! While Selenium doesn’t natively support chaining multiple proxies directly, you can pull this off using an intermediate proxy server (like BrowserMob-Proxy or mitmproxy) as a local hub to route traffic through your desired chain.

Here’s the core logic:

• Configure Selenium to send all traffic to the intermediate local proxy.
• Set up that intermediate proxy to forward traffic to your next proxy (e.g., Tor, another HTTP proxy).
• You can even extend this chain further by adding more intermediate proxies if your use case requires it.

2. Combining Tor with BrowserMob-Proxy to modify request headers & browser fingerprints #

Great question — this combination works perfectly for your testing needs! BrowserMob-Proxy (BMP) lets you intercept and tweak HTTP request headers, while Tor handles anonymizing your traffic. Here’s a practical step-by-step guide to implement this:

Prerequisites #

• Install required packages:

  pip install browsermob-proxy selenium
  

• Ensure Tor is running locally (default Socks5 port is 9050 for the standalone Tor service, 9150 for Tor Browser).
• Download the BrowserMob-Proxy binary matching your operating system.

Step-by-Step Implementation Code #

from browsermobproxy import Server
from selenium import webdriver
from selenium.webdriver.chrome.options import Options

# 1. Start BrowserMob-Proxy (replace with your BMP binary path)
server = Server("/path/to/your/browsermob-proxy")
server.start()
proxy = server.create_proxy()

# 2. Configure BMP to route traffic through Tor's Socks5 proxy
proxy.set_proxy_settings({
    "socksProxy": "127.0.0.1:9050",  # Update to 9150 if using Tor Browser
    "socksVersion": 5
})

# 3. Set up Chrome options for Selenium
chrome_options = Options()
# Use BMP as the proxy for Chrome
chrome_options.add_argument(f'--proxy-server={proxy.proxy}')

# Additional fingerprint modifications (beyond request headers)
chrome_options.add_argument("--disable-webrtc")  # Prevent IP leaks via WebRTC
chrome_options.add_argument("--disable-blink-features=AutomationControlled")  # Avoid basic bot detection
chrome_options.add_argument("user-agent=Mozilla/5.0 (Macintosh; Intel Mac OS X 13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36")  # Custom user-agent

# 4. Launch the Chrome browser
driver = webdriver.Chrome(options=chrome_options)

# 5. Use BMP to modify HTTP request headers
proxy.headers({
    "Accept-Language": "fr-FR,fr;q=0.9,en;q=0.8",
    "Referer": "https://google.com",
    "X-Requested-With": "XMLHttpRequest"
})

# 6. Test your setup
driver.get("https://example.com")
print("Page title:", driver.title)

# Cleanup resources when done
driver.quit()
proxy.close()
server.stop()

Key Notes #

• Fingerprint Beyond Headers: BrowserMob-Proxy focuses on HTTP request/response changes. To fully alter browser fingerprints (like canvas, WebGL, or font rendering), consider using undetected-chromedriver instead of the standard Selenium ChromeDriver — it’s built to bypass bot detection and mask automation traces.
• Tor Configuration: Make sure Tor is running before executing the script. If using Tor Browser, enable "Allow localhost connections" in its preferences to let BMP route traffic through it.
• BMP Compatibility: Ensure your BrowserMob-Proxy version matches your Chrome/Firefox version — older BMP builds might not work with newer browsers.

内容的提问来源于stack exchange，提问作者Shaon Majumder