Question

我对网页进行了一系列测试。我使用Webdriver，我试图检测片刻，例如当浏览器（Firefox）被迫退出gui时。当它发生时，我得到一个非常漫长而丑陋的追溯。

主程序在单独的线程中执行测试套件。例如这段代码：

def urlopen(self, url):
    ''' Opens browser driver and redirects it to specified url addresss. It web driver
    is not initialized, it tries to initialize it at first.
    '''
    # check webdriver initialization, if broken or not initialized, can be fixed

    try:
        self.redirectToBlank(self.driver);
    except (urllib.error.URLError, AttributeError): # User closed web driver or is None

        try:
            self.initDriver()
        except:
            raise

    # !! this is the moment, when I close the browser window

    # if there is a problem with URL loading, it cannot be reapaired
    try:
        self._driver.get(url);
    except:
        print("Webdriver crashed or was forced to quit!", file=sys.stderr)

这种打开浏览器的方法。 initDriver方法初始化self._driver，这是webdriver.Firefox

的一个实例

Exception in thread Thread-2:
Traceback (most recent call last):
  File "c:\Users\david\workspace\tester\sdi\testing.py", line 165, in urlopen
    self._driver.get(url);
  File "c:\Python33\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 176, in get
    self.execute(Command.GET, {'url': url})
  File "c:\Python33\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 162, in execute
    response = self.command_executor.execute(driver_command, params)
  File "c:\Python33\lib\site-packages\selenium\webdriver\remote\remote_connection.py", line 355, in execute
    return self._request(url, method=command_info[0], data=data)
  File "c:\Python33\lib\site-packages\selenium\webdriver\remote\remote_connection.py", line 402, in _request
    response = opener.open(request)
  File "c:\Python33\lib\urllib\request.py", line 469, in open
    response = self._open(req, data)
  File "c:\Python33\lib\urllib\request.py", line 487, in _open
    '_open', req)
  File "c:\Python33\lib\urllib\request.py", line 447, in _call_chain
    result = func(*args)
  File "c:\Python33\lib\urllib\request.py", line 1268, in http_open
    return self.do_open(http.client.HTTPConnection, req)
  File "c:\Python33\lib\urllib\request.py", line 1253, in do_open
    r = h.getresponse()
  File "c:\Python33\lib\http\client.py", line 1143, in getresponse
    response.begin()
  File "c:\Python33\lib\http\client.py", line 354, in begin
    version, status, reason = self._read_status()
  File "c:\Python33\lib\http\client.py", line 324, in _read_status
    raise BadStatusLine(line)
http.client.BadStatusLine: ''

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\Python33\lib\threading.py", line 637, in _bootstrap_inner
    self.run()
  File "c:\Python33\lib\threading.py", line 594, in run
    self._target(*self._args, **self._kwargs)
  File "c:\Users\david\workspace\tester\sdi\testing.py", line 361, in runFromStart
    self._run()
  File "c:\Users\david\workspace\tester\sdi\testing.py", line 369, in _run
    self.units[0]() # run self.test_openBrowser()
  File "c:\Users\david\workspace\tester\sdi\testing.py", line 418, in test_openBrowser
    result = self.webtester.urlopen(self.url)
  File "c:\Users\david\workspace\tester\sdi\testing.py", line 168, in urlopen
    log.warn("Webdriver crashed or was forced to quit!", file=sys.stderr)
  File "c:\Python33\lib\logging\__init__.py", line 1778, in warn
    warning(msg, *args, **kwargs)
  File "c:\Python33\lib\logging\__init__.py", line 1773, in warning
    root.warning(msg, *args, **kwargs)
  File "c:\Python33\lib\logging\__init__.py", line 1244, in warning
    self._log(WARNING, msg, args, **kwargs)
TypeError: _log() got an unexpected keyword argument 'file'

我不太关注，为什么try-except没有捕获任何异常，这是抛出的。我认为第一个例外是相关的，但是如果你需要回溯的第二部分中提到的方法代码，我会添加它。

感谢您的任何建议！

Answer 1

第一次追溯：

File "c:\Users\david\workspace\tester\sdi\testing.py", line 165, in urlopen
   self._driver.get(url);

第二次追溯：

File "c:\Users\david\workspace\tester\sdi\testing.py", line 361, in runFromStart
   self._run()
...
File "c:\Users\david\workspace\tester\sdi\testing.py", line 168, in urlopen
   log.warn("Webdriver crashed or was forced to quit!", file=sys.stderr)

您的try-except在记录声明方面存在问题。

但是我认为你不能从另一个线程中捕获异常，你必须在它自己的线程中捕获它，例如使用消息队列来通知主线程。

浏览器被迫退出时，Webdriver无法捕获异常（python）

1 个答案: