如何恢复“文本”？从发起警报的页面开始，esp ** **人类用户*在页面的**警告**上点击* [关闭]？ [英] How do I recover the "text" from the page originating the alert, esp **after** the human user has *clicked* [dismiss] on the page's **alert**?

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问题描述

基本上，当在javascript中弹出一个警告时，我可以通过调用 selenium.webdriver从 dismiss（）。 common.alert.Alert（browser）.dismiss（）。

Basically, when an alert is popped up in javascript, I can dismiss() it from python perfectly OK, by calling selenium.webdriver.common.alert.Alert(browser).dismiss().

但是，如果浏览器用户通过点击<$取消警报c $ c> [确定] （在屏幕上）用鼠标，然后浏览器提醒空间迷失 body.text 可以不再从python访问。

However, if the "browser user" dismisses the alert by clicking [OK] (on screen) with their mouse, then the browser alert gets "Lost in Space" the body.text can no longer be accessed from python.

所以......我如何从发出警报的页面中恢复文本，esp 之后人类用户在页面的警告上点击了 [dismiss]？

So... How do I recover the "text" from the page originating the alert, esp after the human user has clicked [dismiss] on the page's alert?

以下是提示和脚本证明问题...

Here are the hints and a script to demonstrate the problem...

FYI：原始代码的目标是允许浏览器用户在屏幕上插入 在测试和手动响应特定警报。

FYI: The objective of the originating code is it allow the browser user intervene on screen in testing and manually response to specific alerts.

#!/usr/bin/env python
import os,sys,time
import selenium.webdriver
import selenium.webdriver.support.expected_conditions

print dict(python=sys.version,selenium=selenium.__version__)

path=os.path.join(os.getcwd(),"hello_worlds.html")
url="file:///"+path

open(path,"w").write("""<HTML>
  <HEAD><TITLE>Head Title</TITLE></HEAD>
  <BODY><H1>Hello, worlds!</H1></BODY>
</HTML> """)

browser=selenium.webdriver.Firefox()
browser.get(url)

body=browser.find_element_by_tag_name("body")
print "BODY:",body.text

try:

  for enum,world in enumerate("Mercury Venus Earth Mars Asteroids Jupiter Saturn Uranus Neptune".split()):

    if "Earth" in world: world+=": So do MANUALLY dismiss! {Click [OK] now!!!}"
    else: world+=": AUTO PILOT... please DONT dismiss! {done via selenium.dismiss()!}"

    browser.execute_script('alert("Hello, %s!")'%world)
    if selenium.webdriver.support.expected_conditions.alert_is_present():
      print selenium.webdriver.common.alert.Alert(browser).text

    time.sleep(enum+5)
    if "Earth" not in world: selenium.webdriver.common.alert.Alert(browser).dismiss()

    print "BODY:",body.text

finally:
  browser.quit()

输出:(地球崩溃）

{'python': '2.6.6 (r266:84292, Aug 18 2016, 15:13:37) \n[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)]', 'selenium': '2.53.2'}
BODY: Hello, worlds!
Hello, Mercury: AUTO PILOT... please DONT dismiss! {done via selenium.dismiss()!}!
BODY: Hello, worlds!
Hello, Venus: AUTO PILOT... please DONT dismiss! {done via selenium.dismiss()!}!
BODY: Hello, worlds!
Hello, Earth: So do MANUALLY dismiss! {Click [OK] now!!!}!
BODY:
Traceback (most recent call last):
  File "./js_alert.py", line 37, in <module>
    print "BODY:",body.text
...
selenium.common.exceptions.UnexpectedAlertPresentException: Alert Text: Hello, Earth: So do MANUALLY dismiss! {Click [OK] now!!!}!
Message: Unexpected modal dialog (text: Hello, Earth: So do MANUALLY dismiss! {Click [OK] now!!!}!) The alert disappeared before it could be closed.

奇怪的是，如果浏览器用户触发另一个警报（打开） 另一个页面甚至！），然后 selenium.dismiss（）将拉 body.text 从那里从和回来将按照我的期望运作。

The strange thing is that if the browser user triggers another alert (on another page even!), then a selenium.dismiss() will pull body.text back from limbo and selenium with from then will operate as per (my) expectations.

有关如何让浏览器返回的任何建议 page.body ？ （并逃避警报）

Any suggestions on how to get the browser back to the page.body? (And escape the alert)

附录：以下是类似的问题（通过激烈搜索找到）：

Addendum: Here are similar questions (found with intense searching):

  • downloading - Issues downloading file using Selenium + Firefox
  • java alert - Selenium WebDriver - Unexpected modal dialog Alert
  • UnexpectedAlertPresentException - Webdriver error: "No alert is present" after UnexpectedAlertPresentException is thrown
  • DesiredCapabilities - How to handle an Alert with "UnexpectedAlertBehaviour" capability in Selenium?
  • java&javascript - org.openqa.selenium.UnhandledAlertException: unexpected alert open
  • disables exception or DesiredCapabilities - org.openqa.selenium.UnhandledAlertException: unexpected alert open
  • non-click suggestion - When I show a dialog, an exception "UnhandledAlertException: Modal dialog present" is thrown
  • IE and in the wild - https://github.com/SeleniumHQ/selenium-google-code-issue-archive/issues/4839
  • java bug report? https://groups.google.com/forum/#!topic/webdriver/aNyOfEjMENg
  • "still doesn't work." catching exception does not reset the problem - (However almost exactly the same problem) - how to handle javascript alerts in selenium using python
  • suggested doing a driver.findElement(By.id("myAlert")); but that throws same exception - https://sqa.stackexchange.com/questions/22482/why-my-alert-is-not-popping-up
  • browser.refresh(); gives UnexpectedAlertPresentException so doesn't work. https://github.com/angular/protractor/issues/1486
  • browser.switch_to.window(browser.window_handles[0]) then body.text gives: UnexpectedAlertPresentException
  • Similar - Python webdriver to handle pop up browser windows which is not an alert

推荐答案

我一直在努力解决这个问题很长一段时间;你对你的问题的评论为我解决了这个问题：

I have been struggling with this issue off and on for a long time; your comment on your question solved the problem for me:

两者之后 UnexpectedAlertPresentException 和 NoAlertPresentException抛出 ... 

browser.execute_script('alert("Clearing out past dialogs.")')
browser.switch_to.alert.accept()

如你所说回答，当警报出现时，webdriver正在创建一个对话框。手动关闭警报会导致其引用丢失，但它仍然阻止访问 body.text 。创建新警报似乎允许webdriver清除旧的对话框和（在接受之后）再次授予对页面的访问权。

As you said in your answer, webdriver is creating a 'dialog' when the alert is present. Closing the alert by hand causes its reference to get lost in limbo, but it's still blocking access to body.text. Creating a new alert seems to allow webdriver to clear out that old 'dialog' and (after accepting) grants access to the page again.

这篇关于如何恢复“文本”？从发起警报的页面开始，esp ** **人类用户*在页面的**警告**上点击* [关闭]？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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