硒打印铬，不断显示保存弹出窗口

Question

我需要一些自动脚本来打印页面。该脚本必须在 Chrome 上运行，因为 FF 无法为该打印任务提供合适的输出。我尝试了几件事，但由于某种原因它仍然需要文件名，并且它忽略了我用于 savefile.default_directory 和 download.default_directory 设置的内容。这是我当前正在处理的脚本（不用说，我尝试删除和添加部分，尝试将 TMP_DIR 设置为我的实际默认下载，等等）。

import json
from selenium import webdriver
def main():
    TMP_DIR = "F:/Downloads"
    printer = "Microsoft Print to PDF"
    options = webdriver.ChromeOptions()
    
    print_settings = {
            "recentDestinations": [{
                "id": printer,
                "origin": "local",
                "account": "",
            }],
            "selectedDestinationId": printer,
            "version": 2,
            "isHeaderFooterEnabled": False,
            "isLandscapeEnabled": True
        }
    
    options.add_argument("--start-maximized")
    options.add_argument('--window-size=1920,1080')
    # options.add_argument("--headless")
    options.add_argument('--enable-print-browser')
    options.add_argument("--kiosk")
    options.add_argument("--kiosk-printing")
    options.add_argument("--safebrowsing-disable-download-protection");
    options.add_argument("--safebrowsing-disable-extension-blacklist");

    options.add_experimental_option("prefs", {
        "printing.print_preview_sticky_settings.appState": json.dumps(print_settings),
        "savefile.default_directory": TMP_DIR,  # Change default directory for downloads
        "download.default_directory": TMP_DIR,  # Change default directory for downloads
        "download.prompt_for_download": False,  # To auto download the file
        "download.directory_upgrade": True,
        "profile.default_content_setting_values.automatic_downloads": 1,
        "safebrowsing.enabled": True
    })

    driver = webdriver.Chrome(executable_path="C:/Users/97252/Downloads/chromedriver-win64/chromedriver-win64/chromedriver.exe", 
                    chrome_options=options)
    
    driver.get("https://www.google.com/")
    driver.execute_script("window.print();")

if __name__ == '__main__':
    main()

使用chrome/chromedriver 121.0.6167.184 Python 3.9.13 硒==3.11.0

我还能做些什么来强制下载吗？如果我可以设置文件名，那就太好了，但是在这一点上我会满足于任何事情。

Answer 1

找到了一个奇怪的解决方案，我不能说我喜欢。 为了防止出现对话框，chrome需要模拟手机。为什么？我不知道，但它有效。应用以下修复：

    print_settings = {
        "recentDestinations": [{
            "id": "Save as PDF",
            "origin": "local",
            "account": ""
        }],
        "selectedDestinationId": "Save as PDF",
        "version": 2,
        "isHeaderFooterEnabled": False,
        "mediaSize": { # for some reason, mobile printing assumes A5 papers.
            "height_microns": 297000,
            "name": "ISO_A4",
            "width_microns": 210000,
            "custom_display_name": "A4"
        },
        "customMargins": {},
        "marginsType": 2,
        "scaling": 175,
        "scalingType": 3,
        "scalingTypePdf": 3,
        "isCssBackgroundEnabled": True
    }

    mobile_emulation = {
        "deviceMetrics": { "width": 1024, "height": 600, "pixelRatio": 1.41 },
        "userAgent": "Mozilla/5.0 (Linux; Android 4.2.1; en-us; Nexus 5 Build/JOP40D) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Mobile Safari/535.19",
        "clientHints": {"platform": "Android", "mobile": True} 
   }
    options.add_experimental_option("mobileEmulation", mobile_emulation)