今天翻查了下selenium更改User-Agent的文章，大多數都是以下這樣的：
1 from selenium import webdriver 2 3 # 定義要將瀏覽器偽裝成的ua 4 ua = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36', 5 # 創建瀏覽器選項對象 6 opts = webdriver.ChromeOptions() 7 opts.add_argument('user-agent=%s'%ua) # 添加user-agent 8 driver = webdriver.Chrome() # 瀏覽器對象 9 driver.get('https://www.baidu.com') # 請求baidu 10 print(driver.execute_script('return navigator.userAgent')) # Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Safari/537.36 11 print(driver.execute_script('return navigator.userAgent') == ua) #False
經測試，上面的代碼，並沒有改變瀏覽器的user-agent，它用的還是本身瀏覽器自帶的。
有趣的測試：
1 import time 2 3 from selenium import webdriver 4 5 # 定義要將瀏覽器偽裝成的ua 6 ua = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36', 7 driver = webdriver.Chrome() # 瀏覽器對象 8 driver.implicitly_wait(10) # 全局等待加載 9 driver.get('https://www.baidu.com') # 請求baidu 10 print("當前瀏覽器內置user-agent:", driver.execute_script('return navigator.userAgent')) # 返回當前瀏覽器的ua 11 12 driver.execute_script('window.open()') # 打開一個新窗口 13 driver.switch_to.window(driver.window_handles[-1]) # 切換到新打開的窗口 14 driver.get('https://www.163.com') # 在新窗口打開163 15 driver.execute_cdp_cmd('Network.setUserAgentOverride', 16 {"userAgent": 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36'}) # 切換user-agent 17 print(driver.execute_script('return navigator.userAgent')) # 第一次更改user-agent 18 driver.execute_cdp_cmd('Network.setUserAgentOverride', 19 {'userAgent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0'}) # 火狐瀏覽器 20 print(driver.execute_script('return navigator.userAgent')) # 第二次更改user-agent 21 print('經更改后的user-agent為：', driver.execute_script('return navigator.userAgent')) 22 # 切換窗口，切換前休眠，以保證加載完成 23 time.sleep(5) 24 driver.switch_to.window(driver.window_handles[0]) # 切回第一個窗口，看user-agent是否更改 25 print('第一個瀏覽器窗口的user-agent為：', driver.execute_script('return navigator.userAget')) #None 26 driver.execute_cdp_cmd('Network.setUserAgentOverride', 27 {'userAgent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36'}) # 給第一個窗口添加ua 28 print(driver.execute_script('return navigator.userAgent'))
輸出為：
1 當前瀏覽器內置user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Safari/537.36 2 Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36 3 Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0 4 經更改后的user-agent為： Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0 5 第一個瀏覽器窗口的user-agent為： None 6 Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36