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:

<

Answer 1

This one worked for me:

    Path filePath = Paths.get("path/to/file/fileName.pdf");
    File file = filePath.toFile(); 

 void waitForFileDownloaded(File file, int timeoutSeconds) {
        WebDriver driver = getDriver();
        FluentWait<WebDriver> wait = new FluentWait<>(driver)
                .withTimeout(Duration.ofSeconds(timeoutSeconds))
                .pollingEvery(Duration.ofMillis(500))
                .ignoring(NoSuchElementException.class, StaleElementReferenceException.class);
        wait.until((webDriver) -> file.exists());
    }

Answer 2

I use Scala for my automation but the port to Java should be trivial since I use java Selenium classes there anyway. So, first you need this:

import com.google.common.base.Function
import java.nio.file.{Files, Paths, Path}

def waitUntilFileDownloaded(timeOutInMillis:Int)={
    val wait:FluentWait[Path] = new FluentWait(Paths.get(downloadsDir)).withTimeout(timeOutInMillis, TimeUnit.MILLISECONDS).pollingEvery(200, TimeUnit.MILLISECONDS)
    wait.until(
      new Function[Path, Boolean] {
        override def apply(p:Path):Boolean = Files.list(p).iterator.asScala.size > 0
      }
    )
  }

Then in my test suite where I need to download xls file I just have this:

def exportToExcel(implicit driver: WebDriver) = {
    click on xpath("//div[contains(@class, 'export_csv')]")
    waitUntilFileDownloaded(2000)
  }

I hope you've got the idea. FluentWait is very useful abstraction and though it is a part of Selenium it can be used wherever you need to wait with polling till some condition is met.

Answer 3

The below code is working fine for me.

Also no warning will be as I used Generic type and Duration as recommended.

File file = new File("C:\chromedriver_win32.zip"); FluentWait wait = new FluentWait(driver).withTimeout(Duration.ofSeconds(25)).pollingEvery(Duration.ofMillis(100)); wait.until( x -> file.exists());

Answer 4

Some operating systems (e.g. Mac OS X) don't set the filename until the download is complete. So it seems sufficient to use a wait or a while loop to check for the file to exist.

e.g.

File file = new File(fullPathToFile);
while (!file.exists()) {
    Thread.sleep(1000);
}

Answer 5

do {

   filesize1 = f.length();  // check file size
   Thread.sleep(5000);      // wait for 5 seconds
   filesize2 = f.length();  // check file size again

} while (length2 != length1); 

where f is a File, filesize is long

Answer 6

import time
from os import walk

download_dir = 'path\\to\\download\\folder'


def check_if_download_folder_has_unfinished_files():
    for (dirpath, dirnames, filenames) in walk(download_dir):
        return str(filenames)


def wait_for_files_to_download():
    time.sleep(5)  # let the driver start downloading
    file_list = check_if_download_folder_has_unfinished_files()
    while 'Unconfirmed' in file_list or 'crdownload' in file_list:
        file_list = check_if_download_folder_has_unfinished_files()
        time.sleep(1)


if __name__ == '__main__':
    wait_for_files_to_download()