警告时的 Python 单击按钮 [英] Python click button on alert

问题描述

我是 Python 新手，但需要修改其他人创建的代码.我无法发布完整的代码，但我在下面发布了大部分代码:

I am new to python, but need to modify code created by someone else. I am not able to post the full code, but I posted most of it below:

from bs4 import BeautifulSoup
import datetime
import getpass
from gmail import Gmail
from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from selenium.common.exceptions import ElementNotVisibleException
from time import sleep
from selenium.common.exceptions import NoAlertPresentException
from selenium.webdriver.support import expected_conditions as EC


def soupify(session, url):
    """
    Makes parse-able HTML from any given URL.
    :param session: requests.Session()
    :param url: str
    :return: BeautifulSoup object
    """
    while True:
        try:
            r = session.get(url)
            break
        except Exception as e:
            print(e)
    return BeautifulSoup(r.content, 'html.parser')


def create_http_session():
    """
    Quick little function for returning a requests.Session() instance
    with a properly set User-Agent header.
    :return: requests.Session()
    """
    session = requests.Session()
    session.headers.update({'User-Agent':
                            'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36'
                        })
    return session


def retrieve_hidden_input(soup, name):
    return soup.find('input', attrs={
        'type': 'hidden',
        'name': name
    }).get('value')

class AmericanHomesScraper:
    def __init__(self, username, password, testing):
        self.username = username
        self.password = password
        self.testing = testing
        self.chrome_session = webdriver.PhantomJS()
        self.chrome_session.maximize_window()
        self.g = Gmail()
        self.g.login(username, password)
        self.index = 0

    def check_for_new_emails_from_sender(self,
                                     sender='[e-mail]'):
        self.index += 1
        if self.index % 1000 == 0:
            print('Checking emails - {0}.'.format(datetime.datetime.now()))
        elif self.index == 1:
            print('Checking emails - {0}.'.format(datetime.datetime.now()))
        else:
            pass
        for s in sender:
            messages = self.g.inbox().mail(sender=s,
                                       unread=True)
            for message in messages:
                message.read()
                print(
                'Email from {0}: {1}.'.format(s, datetime.datetime.now()))
                self.check_for_listings()
            self.g.logout()
            self.g = Gmail()
            self.g.login(self.username, self.password)

 def login(self, username, ahsPassword):
    self.ahsPassword = ahsPassword
    self.chrome_session.get('https://www.aaa.com/Login.aspx')
    self.chrome_session.find_element_by_xpath(
        '//*[@id="txtUsername"]'
    ).send_keys(username)
    self.chrome_session.find_element_by_xpath(
        '//*[@id="txtPassword"]'
    ).send_keys(ahsPassword)
    self.chrome_session.find_element_by_xpath(
        '//*[@id="btnSubmit"]'
    ).click()

 def check_for_listings(self):
    #code block
    links = self.chrome_session.find_elements_by_class_name('link-record')
    links = [(link.text, link.get_attribute('href').decode('utf-8'))
             for link in links]
    if len(links) == 0:
        print("No work orders available at {0}".format(
            datetime.datetime.now())
        )
    else:
        for link_text, link_url in links:
            print("Clicking work order {0} at {1}".format(link_text,datetime.datetime.now()))
            self.chrome_session.get(link_url)
            print("Attempting to accept at {0}".format(datetime.datetime.now()))
            try:
                self.chrome_session.find_element_by_xpath("//input[@value='Accept']").click()
                try:
                    WebDriverWait(self.chrome_session, 1).until(EC.alert_is_present)
                    self.chrome_session.switch_to().alert().accept()
                    print("Accepted work order {0} at {1}.".format(link_text,datetime.datetime.now()))
                except:
                    print "no alert"
            except ElementNotVisibleException:
                print("Accept input not found at {0}".format(datetime.datetime.now()))
            self.chrome_session.back()

def main():
    username = raw_input(
        'Please enter the username of the GMail account you want to monitor.
>')
    password = getpass.getpass(
        'Please enter the password of the GMail account you want to monitor.
>')
    ahsPassword = getpass.getpass('Please enter the password for ahs. 
>')
    ahs = AmericanHomesScraper(username, password, testing)
    ahs.login(username,ahsPassword)
    print("Starting script")
    while True:
        ahs.check_for_new_emails_from_sender([
            '[e-mail]',
            '[e-mail]',
        ])


if __name__ == '__main__':
    main()

这正确地找到并点击了接受"输入按钮.单击接受后，将打开一个 javascript 警报(确定/取消)以确认接受.但是，脚本找不到生成的警报.或者，至少它不能接受它，因为调用了异常.

This correctly finds and clicks the "Accept" input button. After clicking accept, a javascript alert (Ok/Cancel) opens to confirm the acceptance. However, the script does not find the resulting alert. Or, at least it is not able to accept it because the exception is called.

如您所见，我尝试了 switch_to().alert()，但没有成功.

As you can see, I have attempted to switch_to().alert(), but that isn't working.

我做错了什么?非常感谢您的帮助，我已经为此工作了几个小时.

What am I doing wrong? Thank you so much for your help, I have been working on this for hours.

更新

此代码在虚拟服务器上运行，不使用 UI.我刚刚意识到驱动程序是 PhantomJS，而不是 Chrome.所以，这可能就是它失败的原因.我已经更新了问题以反映这一点.

This code is running on a virtual server and does not use a UI. I just realized that the driver is PhantomJS, not Chrome. So, this is probably why it is failing. I have updated the question to reflect this.

我已经尝试过类似问题的建议，但没有奏效.3rd 方站点需要警报确认才能完成该过程，但我的脚本无法看到它，因为它是无头的.

I have tried the suggestions from similar questions, but it isn't working. The 3rd party site requires the alert confirmation to finish the process, but my script cannot see it because it is headless.

推荐答案

这里有几点:

• switch_to_alert 已被弃用，因此我们必须强制使用 switch_to().alert()

• 在我看来纯粹是时间问题.因此，我们需要使用 expected_conditions 来诱导 ExplicitWait 即 WebDriverWaitstrong> 子句设置为 alert_is_present 如下:

• switch_to_alert had been deprecated so we have to mandatory use switch_to().alert()

• Seems to me a purely timing issue. Hence we need to induce ExplicitWait i.e. WebDriverWait with expected_conditions clause set to alert_is_present as follows :

from selenium.webdriver.support import expected_conditions as EC
#code block
self.chrome_session.find_element_by_xpath("//input[@value='Accept']").click()
WebDriverWait(self.chrome_session, 10).until(EC.alert_is_present)
self.chrome_session.switch_to().alert().accept()
print("Accepted work order {0} at {1}.".format(link_text, datetime.datetime.now()))

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