如何在烧瓶服务器中启动 webdriver 实例并在全局范围内使用它答案

【问题标题】：How can I start a webdriver instance in flask server and use it globally如何在烧瓶服务器中启动 webdriver 实例并在全局范围内使用它
【发布时间】：2021-05-13 12:50:16
【问题描述】：

我有这个函数，我希望它在烧瓶应用程序的主函数中被调用，并希望将它传递给另一个类。这里的问题是我只想在启动服务器时创建一次实例，并且必须将它全局传递给所有类

def webdriver_instance():
    from selenium import webdriver
    from selenium.webdriver import FirefoxOptions
    opts = FirefoxOptions()
    opts.add_argument("--headless")
    opts.add_argument("start-maximized")
    opts.add_argument("disable-infobars")
    opts.add_argument("--disable-extensions")
    opts.add_argument('--no-sandbox')
    opts.add_argument('--disable-application-cache')
    opts.add_argument('--disable-gpu')
    opts.add_argument("--disable-dev-shm-usage")
    browser = webdriver.Firefox(firefox_options=opts)

    return browser

【问题讨论】：

标签： python-3.x selenium flask selenium-chromedriver

【解决方案1】：

您正在寻找重用 selenium 会话。您可以启动一次浏览器并将会话 ID 和执行程序 url 存储在某处并在需要时获取它：

from selenium import webdriver

driver = webdriver.Firefox()
executor_url = driver.command_executor._url
session_id = driver.session_id
driver.get("http://tarunlalwani.com")

print session_id
print executor_url

def create_driver_session(session_id, executor_url):
    from selenium.webdriver.remote.webdriver import WebDriver as RemoteWebDriver

    # Save the original function, so we can revert our patch
    org_command_execute = RemoteWebDriver.execute

    def new_command_execute(self, command, params=None):
        if command == "newSession":
            # Mock the response
            return {'success': 0, 'value': None, 'sessionId': session_id}
        else:
            return org_command_execute(self, command, params)

    # Patch the function before creating the driver object
    RemoteWebDriver.execute = new_command_execute

    new_driver = webdriver.Remote(command_executor=executor_url, desired_capabilities={})
    new_driver.session_id = session_id

    # Replace the patched function with original function
    RemoteWebDriver.execute = org_command_execute

    return new_driver

driver2 = create_driver_session(session_id, executor_url)
print driver2.current_url

来源：https://tarunlalwani.com/post/reusing-existing-browser-session-selenium/

【讨论】：