WebDriverWait.until - javascript error: Cannot read property 'get' of undefined

Question

我有访问网站和导出一些 Excel 文件的功能。为此，我从硒中导入：

from selenium.webdriver.support.ui import WebDriverWait

然后我在 [=] 的 'until' 中调用函数 every_downloads_chrome 19=]WebDriverWait.

nameFile = WebDriverWait(driver, 120, 1).until(every_downloads_chrome)

# method to get the downloaded file name
def every_downloads_chrome(driver):
    if not driver.current_url.startswith("chrome://downloads"):
        driver.execute_script("window.open('');")
        driver.switch_to.window(driver.window_handles[1])
        driver.get("chrome://downloads/")
    return driver.execute_script("""
        var items = downloads.Manager.get().items_;
        if (items.every(e => e.state === "COMPLETE"))
            return items.map(e => e.fileUrl || e.file_url);
        """)

这适用于我的计算机，Windows 10 - Google Chrome 版本 79.0.3945.130（64 位）。但是，当我尝试使用 Windows 10 - Google 80.0.3987.122（64 位）时 'Production computer'，出现错误：

Erro Message: javascript error: Cannot read property 'get' of undefined
  (Session info: chrome=80.0.3987.122)
Traceback (most recent call last):
  File "<ipython-input-1-e86f4018e9d8>", line 394, in job
    nameFile = WebDriverWait(driver, 120, 1).until(every_downloads_chrome)
  File "C:\Users\***\AppData\Local\Continuum\anaconda3\lib\site-packages\selenium\webdriver\support\wait.py", line 71, in until
    value = method(self._driver)
  File "<ipython-input-1-e86f4018e9d8>", line 91, in every_downloads_chrome
    """)
  File "C:\Users\***\AppData\Local\Continuum\anaconda3\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 636, in execute_script
    'args': converted_args})['value']
  File "C:\Users\***\AppData\Local\Continuum\anaconda3\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "C:\Users\***\AppData\Local\Continuum\anaconda3\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.JavascriptException: Message: javascript error: Cannot read property 'get' of undefined
  (Session info: chrome=80.0.3987.122)

Answer 1

问题：downloads.Manager.get() 在 Chrome.

的 80 版本后不起作用

所以，我更改#方法来获取下载的文件名

def every_downloads_chrome(driver):
    if not driver.current_url.startswith("chrome://downloads"):
        driver.execute_script("window.open('');")
        driver.switch_to.window(driver.window_handles[1])
        driver.get("chrome://downloads/")
    return driver.execute_script("""
        var elements = document
        .querySelector('downloads-manager')
        .shadowRoot.querySelector('#downloadsList').items;
        if (elements.every(e => e.state === "COMPLETE"))
               return elements.map(elements =>elements.fileUrl || elements.file_url);
        """)

WebDriverWait.until - javascript error: Cannot read property 'get' of undefined

WebDriverWait.until - javascript error: Cannot read property 'get' of undefined

python

selenium

google-chrome

selenium-chromedriver

webdriverwait