使用 Selenium 单击链接（下载文件）

Question

使用 Selenium 单击链接（下载文件）。尝试过 xpath、逐文本元素等，但没有奏效。该元素如下所示：

<span class="download-data-link"><a download="" target"_blank"="" style="cursor:pointer">Download file in csv format</a></span>

我在使用 xpath 方法时遇到的错误：

   downloadWithSelenium(currDate,fileName, fileLink)
  File "D:\code\portfolio\downloadWithSelenium.py", line 27, in downloadWithSelenium
    browser.find_element_by_xpath("//*[@id='historicalData']").click()
  File "C:\Users\susmeher\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py", line 80, in click
    self._execute(Command.CLICK_ELEMENT)
  File "C:\Users\susmeher\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py", line 628, in _execute
    return self._parent.execute(command, params)
  File "C:\Users\susmeher\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 312, in execute
    self.error_handler.check_response(response)
  File "C:\Users\susmeher\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.ElementNotVisibleException: Message: element not visible
  (Session info: chrome=65.0.3325.181)
  (Driver info: chromedriver=2.37.544315 (730aa6a5fdba159ac9f4c1e8cbc59bf1b5ce12b7),platform=Windows NT 10.0.15063 x86_64)

Answer 1

此错误消息...

selenium.common.exceptions.ElementNotVisibleException: Message: element not visible 
(Session info: chrome=65.0.3325.181) 
(Driver info: chromedriver=2.37.544315 (730aa6a5fdba159ac9f4c1e8cbc59bf1b5ce12b7),platform=Windows NT 10.0.15063 x86_64)

...暗示用于标识所需元素的xpath 不可见。

解决方案

根据您共享的 HTML，在您必须诱导 WebDriverWait 的所需元素上识别和调用 click()，并且您可以使用以下任一 Locator Strategies ：

• 链接文本：

  new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.linkText("Download file in csv format"))).click();
  

• Xpath：

  new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.xpath("//span[@class='download-data-link']/a[contains(.,'Download file in csv format')]"))).click();