Selenium: how to handle JNLP issue in Chrome and Python

Question

In Chrome (Edge or Firefox) JNLP warning This type of file can harm your computer popups when I try to open web page containing this Java extension with Selenium WebDri

Answer 1

Solution with use of Python + Selenium
Short description: click on Keep button and downloaded file with help of win32api and win32con. Similar approach or principle can be used in other programing languages or operation systems.

from selenium import webdriver
import time
import win32api, win32con

# define click action - click with left mouse button at a position
def click_at(coord):
    # move mouse cursor on requested position (coord is tuple with X and Y position)
    win32api.SetCursorPos(coord)
    # press and release LMB
    win32api.mouse_event(win32con.MOUSEEVENTF_LEFTDOWN, coord[0], coord[1])
    win32api.mouse_event(win32con.MOUSEEVENTF_LEFTUP, coord[0], coord[1])

# set path to chromedriver and start as usually
chromeserver = r'...\chromedriver.exe'
driver = webdriver.Chrome(executable_path=chromeserver)
# run page containing JNLP
driver.get('http://somepagewithjnpl.com')

# maximize browser window 
driver.maximize_window()
# get size of the window via Selenium - returns dictionary {'width': int, 'height': int}
# (note: 0;0 point is located to upper left corner)
current_size = driver.get_window_size()
# set coordinations where mouse should click on Keep button 
# (note: position could be slightly different in different browsers or languages - successfully 
# tested in Chrome + Win10 + Czech and English langs) 
coord = (current_size['width'] // 4, current_size['height']-50)
# click on Keep button to start downloading JNLP file
click_at(coord)
# take a short breather to give browser time to download JNLP file, notification changes then
time.sleep(5)

# set new coords and click at JNLP file to install and run Java WebStart
coord = (50, current_size['height']-50)
click_at(coord)
# center mouse cursor (not necessary but I like it)
coord = (current_size['width'] // 2, current_size['height'] // 2)
win32api.SetCursorPos(coord)
# take a breather again to give browser time for JNLP installation and Java activation
time.sleep(10)

Congratulations - you should now stand behind ugly JNLP gate keeper and may do anything you need.