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

You can get the status of each download by visiting chrome://downloads/ with the driver.

To wait for all the downloads to finish and to list all the paths:

def every_downloads_chrome(driver):
    if not driver.current_url.startswith("chrome://downloads"):
        driver.get("chrome://downloads/")
    return driver.execute_script("""
        var items = document.querySelector('downloads-manager')
            .shadowRoot.getElementById('downloadsList').items;
        if (items.every(e => e.state === "COMPLETE"))
            return items.map(e => e.fileUrl || e.file_url);
        """)


# waits for all the files to be completed and returns the paths
paths = WebDriverWait(driver, 120, 1).until(every_downloads_chrome)
print(paths)

Was updated to support changes till version 81.

I have had the same problem and found a solution. You can check weither or not a .crdownload is in your download folder. If there are 0 instances of a file with .crdownload extension in the download folder then all your downloads are completed. This only works for chrome and chromium i think.

def downloads_done():
    while True:
        for filename in os.listdir("/downloads"):
            if ".crdownload" in i:
                time.sleep(0.5)
                downloads_done()

Whenever you call downloads_done() it will loop itself untill all downloads are completed. If you are downloading massive files like 80 gigabytes then i don't recommend this because then the function can reach maximum recursion depth.

2020 edit:

def wait_for_downloads():
    print("Waiting for downloads", end="")
    while any([filename.endswith(".crdownload") for filename in 
               os.listdir("/downloads")]):
        time.sleep(2)
        print(".", end="")
    print("done!")

The "end" keyword argument in print() usually holds a newline but we replace it. While there are no filenames in the /downloads folder that end with .crdownload sleep for 2 seconds and print one dot without newline to console

I don't really recommend using selenium anymore after finding out about requests but if it's a very heavily guarded site with cloudflare and captchas etc then you might have to resort to selenium.

With Chrome 80, I had to change the answer from @florent-b by the code below:

def every_downloads_chrome(driver):
    if not driver.current_url.startswith("chrome://downloads"):
        driver.get("chrome://downloads/")
    return driver.execute_script("""
        return document.querySelector('downloads-manager')
        .shadowRoot.querySelector('#downloadsList')
        .items.filter(e => e.state === 'COMPLETE')
        .map(e => e.filePath || e.file_path || e.fileUrl || e.file_url);
        """)

I believe this is retro-compatible, I mean this shall be working with older versions of Chrome.