Question

我已经设置了具有多种配置的webdriver，但仍然无法仅以无头模式下载文件。

我尝试添加POST命令

chrome_options = webdriver.ChromeOptions()
prefs = {
    "download.default_directory": path,
    # "directory_upgrade": True,
    # "safebrowsing.enabled": False,
    "safebrowsing.disable_download_protection": True}
chrome_options.add_experimental_option("prefs", prefs)
if headless==True:
    chrome_options.add_argument('--headless')
# chrome_options.add_argument('log-level=2')
# chrome_options.add_argument('--disable-extensions')
# chrome_options.add_argument('--disable-gpu')
# chrome_options.add_argument('--no-sandbox')
local="/home/rittle/Workspace/portal_dl/chromedriver"
EC2="/home/ubuntu/portal_dl/chromedriver"
browser = webdriver.Chrome(executable_path=local,
    chrome_options=chrome_options,
)
browser.command_executor._commands["send_command"] = ("POST", '/session/$sessionId/chromium/send_command')
params = {'cmd': 'Page.setDownloadBehavior', 'params': {'behavior': 'allow', 'downloadPath': path}}
command_result = browser.execute("send_command", params)

我希望一旦单击页面上的一个按钮后就会有一个.crdownload文件，但是我的/ tmp /目录为空，此代码可以正常运行

Answer 1

首先，请参见此bug thread。

截至4天前...您需要的是增加无头的大小...

if headless==True:
    chrome_options.add_argument('--headless')
    chrome_options.add_argument('--window-size=1920,1080')

根据错误：

未知错误：DevToolsActivePort文件不存在

您可以添加--disable-dev-shm-usage作为参数：

 chrome_options.add_argument('--disable-dev-shm-usage')

请参见@DebanjanB answer。

希望这对您有帮助！

Answer 2

使用execute命令覆盖BrowserManagmentKeywords（在SeleniumLibrary / keywords / browsermanagement.py下）的create_webdriver方法，以启用无头chrome浏览器下载。

from SeleniumLibrary.base import keyword
from SeleniumLibrary.keywords import BrowserManagementKeywords

from selenium import webdriver

class CustomKeywords():

    def __init__(self):
        self.logger('Initializing Custom Keywords')

    @keyword
    def create_webdriver(self, driver_name, alias=None, kwargs={},
                     **init_kwargs):
        if not isinstance(kwargs, dict):
            raise RuntimeError("kwargs must be a dictionary.")
        for arg_name in kwargs:
            if arg_name in init_kwargs:
                raise RuntimeError("Got multiple values for argument    '%s'." % arg_name)
            init_kwargs[arg_name] = kwargs[arg_name]
        driver_name = driver_name.strip()
        try:
            creation_func = getattr(webdriver, driver_name)
        except AttributeError:
            raise RuntimeError("'%s' is not a valid WebDriver name." % driver_name)
        driver = creation_func(**init_kwargs)

        options = init_kwargs['chrome_options']
        args = options.to_capabilities()[options.KEY]['args']
        is_headless = '--headless' in args or 'headless' in args

        if is_headless:
            prefs = options.to_capabilities()[options.KEY]['prefs']
            download_dir = prefs['download.default_directory']
            self.enable_download_in_headless_chrome(driver, download_dir)

        driver = BrowserManagementKeywords(self)._wrap_event_firing_webdriver(driver)
        return BrowserManagementKeywords(self).ctx.register_driver(driver, alias)

    @keyword
    def enable_download_in_headless_chrome(self, driver, download_dir):

        #commands to enable download feature in headless chrome browser

        driver.command_executor._commands["send_command"] = ("POST", '/session/$sessionId/chromium/send_command')

        params = {'cmd': 'Page.setDownloadBehavior', 'params': {'behavior': 'allow', 'downloadPath': download_dir}}
        driver.execute("send_command", params)

如何修复Chrome无头不下载文件？

2 个答案: