Question

在我使用带有Python的Selenium Webdriver打开网站后，我试图获取 HTTP状态代码，我发现无法获得 HTTP状态代码，所以唯一的方法是获取网络日志并从中获取 HTTP状态代码

所以我试图用硒打印日志，但这给了我 InvalidArgumentException

from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

# enable browser logging
d = DesiredCapabilities.CHROME
d['loggingPrefs'] = { 'performance':'ALL' }

driver = webdriver.Chrome(desired_capabilities=d)

# load the desired webpage
driver.get('http://foo.com')

# print messages
for entry in driver.get_log('performance'):
    print(entry)

这是运行后出现的错误

InvalidArgumentException                  Traceback (most recent call last)
<ipython-input-13-8480733201dc> in <module>
     12 
     13 # print messages
---> 14 for entry in driver.get_log('performance'):
     15     print(entry)

c:\users\slimshady\appdata\local\programs\python\python37-32\lib\site-packages\selenium\webdriver\remote\webdriver.py in get_log(self, log_type)
   1260             driver.get_log('server')
   1261         """
-> 1262         return self.execute(Command.GET_LOG, {'type': log_type})['value']

c:\users\slimshady\appdata\local\programs\python\python37-32\lib\site-packages\selenium\webdriver\remote\webdriver.py in execute(self, driver_command, params)
    319         response = self.command_executor.execute(driver_command, params)
    320         if response:
--> 321             self.error_handler.check_response(response)
    322             response['value'] = self._unwrap_value(
    323                 response.get('value', None))

c:\users\slimshady\appdata\local\programs\python\python37-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py in check_response(self, response)
    240                 alert_text = value['alert'].get('text')
    241             raise exception_class(message, screen, stacktrace, alert_text)
--> 242         raise exception_class(message, screen, stacktrace)
    243 
    244     def _value_or_default(self, obj, key, default):

InvalidArgumentException: Message: invalid argument: log type 'performance' not found
  (Session info: chrome=75.0.3770.80)

在这里我可能做错了什么？

Answer 1

根据{3}在Chrome驱动程序75中的指定，功能loggingPrefs已重命名为goog:loggingPrefs，这是W3C标准所要求的。因此，应该对设置功能的代码进行调整，至少由于日志捕获原因，没有必要退回到非w3c模式。

d['goog:loggingPrefs'] = { 'performance':'ALL' }

Answer 2

chrome 75及其chromedriver遇到相同的问题，将'w3c'设置为False可解决此问题：

from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
from selenium.webdriver.chrome.options import Options

d = DesiredCapabilities.CHROME
d['loggingPrefs'] = { 'performance':'ALL' }

chrome_options = Options()
chrome_options.add_experimental_option('w3c', False)

driver = webdriver.Chrome(desired_capabilities=d, options=chrome_options)

Selenium Chrome无法看到浏览器日志InvalidArgumentException

2 个答案: