Wait for Download to finish in selenium webdriver JAVA

Question

Once clicking a download button, files will be downloaded. Before executing next code, it needs to wait until the download completes.

My code looks like this:

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Answer 1

If you are using chrome for the download, the you can use the below method to make sure the script will wait until the download is completed.

Python Implementation:

def waitUntilDownloadCompleted(maxTime=600):
    driver.execute_script("window.open()")
    # switch to new tab
    driver.switch_to.window(driver.window_handles[-1])
    # navigate to chrome downloads
    driver.get('chrome://downloads')
    # define the endTime
    endTime = time.time() + maxTime
    while True:
        try:
            # get the download percentage
            downloadPercentage = driver.execute_script(
                "return document.querySelector('downloads-manager').shadowRoot.querySelector('#downloadsList downloads-item').shadowRoot.querySelector('#progress').value")
            # check if downloadPercentage is 100 (otherwise the script will keep waiting)
            if downloadPercentage == 100:
                # exit the method once it's completed
                return downloadPercentage
        except:
            pass
        # wait for 1 second before checking the percentage next time
        time.sleep(1)
        # exit method if the download not completed with in MaxTime.
        if time.time() > endTime:
            break

Just call the method when ever you click on download link/button.

# click on download button
driver.find_element_by_xpath("//*[@id='perform']").click()
#wait until the download completed
waitUntilDownloadCompleted(120) #2 minutes