Selenium Python 在VPS中设置Chrome默认下载目录

Question

I'm trying to download a pdf using the latest google-chrome & chromedriver on a Ubuntu 16.04 LTS VPS server with the following code.

import json
import time
from pyvirtualdisplay import Display
from selenium import webdriver

display = Display(visible=0, size=(1768, 1368))
display.start()
chrome_options = webdriver.ChromeOptions()
# chrome_options.add_argument('--headless')
chrome_options.add_argument("--no-sandbox")
chrome_options.add_argument("--disable-notifications")
chrome_options.add_argument("--disable-popup-blocking")
chrome_options.add_argument("--disable-logging")
chrome_options.add_argument("--log-level=3")
chrome_options.add_argument("--kiosk-printing")
appState = {
    "recentDestinations": [{"id": "Save as PDF", "origin": "local"}],
    "selectedDestinationId": "Save as PDF",
    "version": 2,
}

prefs = {
    "printing.print_preview_sticky_settings.appState": json.dumps(appState),
    "download": {
        "default_directory": "/path/to/dir/",
        "prompt_for_download": False,
        "directory_upgrade": True,
    },
}
chrome_options.add_experimental_option("prefs", prefs)
driver = webdriver.Chrome(chrome_options=chrome_options)
driver.get(
    "https://www.adobe.com/content/dam/acom/en/accessibility/products/acrobat/pdfs/acrobat-x-accessibility-checker.pdf"
)
time.sleep(10)
driver.execute_script("window.print();")
time.sleep(30)
driver.quit()
display.stop()

When I test the above code locally, it downloads the file in the system's default download directory instead of path/to/dir but downloads the file anyway.

But, the same code when executed in the VPS server doesn't download anything.

Things I've tried so far:

• locate any pdf downloaded by the script using locate -i *.pdf (It confirms no new pdfs were downloaded)
• setting an environment variable by using: export XDG_DOWNLOAD_DIR='path/to/dir'
• Running the command: xdg-user-dirs-update --set DOWNLOAD path/to/dir
• verified default download dir is set using the command: xdg-user-dir DOWNLOAD (It shows system's default download folder)

But nothing worked so far, any help will be appreciated!

NOTE: I know it is possible to download the file by making a GET request using modules like requests , urllib3 , etc. I'm just looking for a selenium based solution.

Answer 1

I ran into a similar problem and was able to find the following solution:

The download.default_directory setting is only for downloaded content. Chrome treats files saved on the page differently. To change the default folder for a printout of the page, simply set the savefile.default_directory value instead.

In order to update the download directory for window printing, update your prefs with this:

prefs = {
    "printing.print_preview_sticky_settings.appState": json.dumps(appState),
    "download": {
        "default_directory": "/path/to/dir/",
        "prompt_for_download": False,
        "directory_upgrade": True,
    },
    "savefile.default_directory": "path/to/dir/"
}