Selenium (Python) - waiting for a download process to complete using Chrome web driver

Question

I\'m using selenium and python via chromewebdriver (windows) in order to automate a task of downloading large amount of files from different pages. My code works, but the so

Answer 1

When using test automation, its crucial that developers make the software testable. It is your job to check the software combined with the testability, meaning that you need to request a spinner or a simple HTML tag which indicates when the download is done successfully.

In a case as yours, where you cannot check it in the UI and you cannot check in system, this is the best way to solve it.

Answer 2

I had the same problem and this method worked for me.

import time
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.common.exceptions import ElementClickInterceptedException
from threading import Thread
import os
import datetime
def checkFilePresence(downloadPath, numberOfFilesInitially, artistName, 
    songTitle):
    timeNow = datetime.datetime.now()
    found = False
    while not found:
        numberOfFilesNow = len(os.listdir(downloadPath))
        if numberOfFilesNow > numberOfFilesInitially:
            for folders, subfolders, files in os.walk(downloadPath):
                for file in files:
                    modificationTime = datetime.datetime.fromtimestamp\
                    (os.path.getctime(os.path.join(folders, file)))
                    if modificationTime > timeNow:
                        if file.endswith('.mp3'):
                            return

Answer 3

This may not work for all usecases but for my simple need to wait for one pdf to download it works great. Based off of Walter's comment above.

def get_non_temp_len(download_dir):
    non_temp_files = [i for i in os.listdir(download_dir) if not (i.endswith('.tmp') or i.endswith('.crdownload'))]
    return len(non_temp_files)

download_dir = 'your/download/dir'
original_count = get_non_temp_len(download_dir) # get the file count at the start

# do your selenium stuff 

while original_count == get_non_temp_len(download_dir):
    time.sleep(.5) # wait for file count to change
    
driver.quit()