How to Download a File on a Click Event Using Selenium

How can I download a file on a click event using selenium?

Find the link using find_element(s)_by_*, then call click method.

from selenium import webdriver

# To prevent download dialog
profile = webdriver.FirefoxProfile()
profile.set_preference('browser.download.folderList', 2) # custom location
profile.set_preference('browser.download.manager.showWhenStarting', False)
profile.set_preference('browser.download.dir', '/tmp')
profile.set_preference('browser.helperApps.neverAsk.saveToDisk', 'text/csv')

browser = webdriver.Firefox(profile)
browser.get("http://www.drugcite.com/?q=ACTIMMUNE")

browser.find_element_by_id('exportpt').click()
browser.find_element_by_id('exporthlgt').click()

Added profile manipulation code to prevent download dialog.

Download all files on a click event

You can avoid .click and concatenate the name onto base url and .get which will download all. Specify path to chromedriver if not on environmental path.

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

base = 'http://biokb.ncpsb.org/AllerGAtlas/index.php/Home/Download/gene/genesymbol/'
d = webdriver.Chrome()
d.get('http://biokb.ncpsb.org/AllerGAtlas/index.php/Home/Browse/?fbclid=IwAR2RPwrnsT7zR9SEdU0PW-eJ7HAelg6WRyn23-hCjTrNCEOb1uOMd_qG3ns')
links = [base + item.text for item in  WebDriverWait(d,10).until(EC.presence_of_all_elements_located((By.CSS_SELECTOR, "#geneTable td:nth-of-type(1)")))]
for link in links:
    d.get(link)
d.quit()

Download with python selenium

In the website I click on a button that opens a small sub-window

Here you've mentioned that you are opening a new sub window where you've to click the button to download. But you are not switching to that window. Hence not able to find that element.

Use driver.window_handles to get handle to the opened window and switch to that window using driver.switch_to_window() then try clicking on the button to download.

You can see how to handle multiple windows in python selenium in this stackoverflow link.

EDIT:

So it seems there were some issues in your code. Like the locator for download buttons next to chess board and the one after that were incorrect. I've corrected the locator's with proper xpath and also made little change in chrome_options. You just have to change the download.defualt_directory to a path in you machine and the below code will work:

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

chrome_options = Options()

chrome_options.add_experimental_option("prefs", {
  "download.default_directory": r"C:\Users\Thanthu Nair\Downloads\Test",
  "download.prompt_for_download": False,
  "download.directory_upgrade": True,
  "safebrowsing.enabled": True
})
driver = webdriver.Chrome("./chromedriver", options=chrome_options)

website = "https://www.chess.com/ccc"
driver.get(website)  # loads the page
driver.maximize_window()

# This closes a sub-window that opens automatically
element = driver.find_element_by_class_name("form-button-component")
element.click()

download = driver.find_element_by_xpath("//i[@title='Download']")
download.click()

# Click to download
download.find_element_by_xpath("//button[normalize-space()='Download Game (PGN)']").click()

Download a file in IE using Selenium

So, the problem was that the cursor gets stuck sometimes when you call the click() function. So as a solution I used the Robot class to move my cursor and click on the export button and then I used Robot class to press Alt+S, which is a keyboard shortcut to save a file in IE.

To click on the button I used

try
{
    Robot robot = new Robot();
    Thread.sleep(2000);
    robot.mouseMove(coordinates.getX()+100,coordinates.getY()-400); 
    Thread.sleep(2000);
    robot.mousePress( InputEvent.BUTTON1_DOWN_MASK);
    robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
}
catch (AWTException e)
{
    e.printStackTrace();
}

To get the coordinates in the above snippet I used the following line

Point coordinates = driver.findElement(By.id("id")).getLocation();
System.out.println("Co-ordinates"+coordinates); 

And to press Alt+S I used the following code

try
{
     Robot robot = new Robot();
     robot.setAutoDelay(250);
     robot.keyPress(KeyEvent.VK_ALT);
     Thread.sleep(1000);
     robot.keyPress(KeyEvent.VK_S);
     robot.keyRelease(KeyEvent.VK_ALT);
     robot.keyRelease(KeyEvent.VK_S);
}
catch (AWTException e)
{
    e.printStackTrace();
}

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