Selenium webdriver 在 chrome://downloads 找不到元素
问题描述
我在 python 中使用 selenium 和 chromedriver.
I use selenium with the chromedriver in python.
我的问题是当我尝试访问 chrome 下载页面 (chrome://downloads) 上的元素时,selenium 给了我一个错误.例如,我尝试获取文件 url "http://file.jpg".
My problem is that selenium gives me an error as i try to access elements on the chrome download page (chrome://downloads). For example i try to get the file url "http://file.jpg".
<a id="url" target="_blank" href="http://file.jpg">http://file.jpg</a>
但是当我尝试通过它的 id 获取元素时,我得到了一个异常.
But as i try to get the element by its id I get an exception.
代码:
driver = webdriver.Chrome("chromedriver.exe")
driver.get("chrome://downloads/")
file_url = driver.find_element_by_id("url").get_attribute("href")
例外:
Traceback (most recent call last):
File "<pyshell#34>", line 3, in <module>
driver.find_element_by_id("url")
File "D:Pythonlibsite-packagesseleniumwebdriveremotewebdriver.py", line 269, in find_element_by_id
return self.find_element(by=By.ID, value=id_)
File "D:Pythonlibsite-packagesseleniumwebdriveremotewebdriver.py", line 752, in find_element
'value': value})['value']
File "D:Pythonlibsite-packagesseleniumwebdriveremotewebdriver.py", line 236, in execute
self.error_handler.check_response(response)
File "D:Pythonlibsite-packagesseleniumwebdriveremoteerrorhandler.py", line 192, in check_response
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"id","selector":"url"}
(Session info: chrome=56.0.2924.87)
(Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Windows NT 10.0.10586 x86_64)
通过 driver.execute_script()
使用 javascript 对我也不起作用.当我在浏览器中看到元素时,为什么会收到 NoSuchElementException
?
Using javascript via driver.execute_script()
didn't work for me either.
Why am i getting a NoSuchElementException
when i can see the element in the browser?
解决方案
位于多个 shadow-root
块内的目标链接.试试这个:
Target link located inside several shadow-root
blocks. Try this:
driver = webdriver.Chrome("chromedriver.exe")
driver.get("chrome://downloads/")
manager = driver.find_element_by_css_selector('body/deep/downloads-manager')
item = manager.find_element_by_css_selector('body/deep/downloads-item')
shadow = driver.execute_script('return arguments[0].shadowRoot;', item)
link = shadow.find_element_by_css_selector('div#title-area>a')
file_url = link.get_attribute("href")
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