Download Files Using LambdaTest Selenium Grid

While you perform Selenium test automation, you may want to test the download functionality of your web-application or website. With LambdaTest Selenium Grid, you can test the download feature of your web-application on 2000+ real browsers for mobile and desktop. You can download a file inside the test machine through your Selenium test automation script by Base64 encryption & decryption.

LambdaTest Selenium Grid will provide you with an encoded string of base64 which you can leverage to download any file inside the virtual machine triggered through your Selenium testing scripts. For this, LambdaTest has provided three main flags using JavascriptExecutor to:

Check whether the downloaded file exists in the test machine.

((JavascriptExecutor) driver).executeScript("lambda-file-exists=file-name.file_format");

1

((JavascriptExecutor) driver).executeScript("lambda-file-exists=file-name.file_format");
Retrieve file metadata such as md5 code, modified time, name and size

((JavascriptExecutor) driver).executeScript("lambda-file-stats=file-name.file_format");

1

((JavascriptExecutor) driver).executeScript("lambda-file-stats=file-name.file_format");
Download file content using base64 encoding.

((JavascriptExecutor) driver).executeScript("lambda-file-content=file-name.file_format");

1

((JavascriptExecutor) driver).executeScript("lambda-file-content=file-name.file_format");

Note: Don’t forget to feed the file format with the file name to the JavaScriptExecutor.

Downloading File Using Selenium With Java

import java.io.FileOutputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Base64;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.NoSuchElementException;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxOptions;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.openqa.selenium.remote.SessionId;
import org.testng.Assert;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

public class DownloadCheck {
	public String username = "user_name";
	public String accesskey = "access_Key";
	public RemoteWebDriver driver;
	public String gridURL = "@hub.lambdatest.com/wd/hub"; 
	String status = "passed";

	@BeforeTest
	public void setUp() throws Exception {
		
		FirefoxOptions options = new FirefoxOptions();
		options.addPreference("browser.download.folderList", 2);
		options.addPreference("browser.download.dir", "D:\\Downloads");
		options.addPreference("browser.download.useDownloadDir", true);
		options.addPreference("browser.helperApps.neverAsk.saveToDisk", "image/jpeg");
		
		DesiredCapabilities capabilities = new DesiredCapabilities();
		capabilities.setCapability("browserName", "firefox");
		capabilities.setCapability("version", "65");
		capabilities.setCapability("platform", "WIN10");
		capabilities.setCapability("build","Download functionality test");
		capabilities.setCapability("name", "sample test");
		capabilities.setCapability("network", true); // To enable network logs
		capabilities.setCapability("visual", true);
		capabilities.setCapability("video", true); // To enable video recording`
		capabilities.setCapability("console", true); // To capture console logs
		capabilities.setCapability("selenium_version","3.4.0");
	
		capabilities.merge(options);

		try {	
			
			driver = new RemoteWebDriver(new URL("https://" + username + ":" + accesskey + gridURL), capabilities);
			
		} catch (MalformedURLException e) {
			System.out.println("Invalid grid URL");
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}

	@Test()
	public void fileDownload() throws Exception {
		try {
			
			driver.get("https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download");
			driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
			driver.switchTo().frame("iframeResult");

			WebElement element = driver.findElement(By.xpath("//a[@href='/images/myw3schoolsimage.jpg']"));
			element.click();
					
			Thread.sleep(4000);  	
			
			Assert.assertEquals(((JavascriptExecutor) driver).executeScript("lambda-file-exists=myw3schoolsimage.jpg"), true); //file exist check
			
			System.out.println(((JavascriptExecutor) driver).executeScript("lambda-file-stats=myw3schoolsimage.jpg")); //retrieve file stats
			
			String base64EncodedFile = ((JavascriptExecutor) driver).executeScript("lambda-file-content=myw3schoolsimage.jpg").toString(); // file content download
			System.out.println(base64EncodedFile);
			
			
			 byte[] data = Base64.getDecoder().decode(base64EncodedFile);
			 OutputStream stream = new FileOutputStream("myw3cImage.jpg");
			 stream.write(data);
			
	
					} catch (NoSuchElementException e) {
			System.out.println(e.getMessage());

			SessionId id = driver.getSessionId();
			System.out.println("Failed test session id: " + id.toString());
		}

	}

	@AfterTest
	public void tearDown() throws Exception {
		if (driver != null) {
			((JavascriptExecutor) driver).executeScript("lambda-status=" + status);
			driver.quit();
		}
	}
}

100

101

102

103

import java.io.FileOutputStream;

import java.io.OutputStream;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.Base64;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;

import org.openqa.selenium.JavascriptExecutor;

import org.openqa.selenium.NoSuchElementException;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.firefox.FirefoxOptions;

import org.openqa.selenium.remote.DesiredCapabilities;

import org.openqa.selenium.remote.RemoteWebDriver;

import org.openqa.selenium.remote.SessionId;

import org.testng.Assert;

import org.testng.annotations.AfterTest;

import org.testng.annotations.BeforeTest;

import org.testng.annotations.Test;

public class DownloadCheck {

public String username = "user_name";

public String accesskey = "access_Key";

public RemoteWebDriver driver;

public String gridURL = "@hub.lambdatest.com/wd/hub";

String status = "passed";

@BeforeTest

public void setUp() throws Exception {

FirefoxOptions options = new FirefoxOptions();

options.addPreference("browser.download.folderList", 2);

options.addPreference("browser.download.dir", "D:\\Downloads");

options.addPreference("browser.download.useDownloadDir", true);

options.addPreference("browser.helperApps.neverAsk.saveToDisk", "image/jpeg");

DesiredCapabilities capabilities = new DesiredCapabilities();

capabilities.setCapability("browserName", "firefox");

capabilities.setCapability("version", "65");

capabilities.setCapability("platform", "WIN10");

capabilities.setCapability("build","Download functionality test");

capabilities.setCapability("name", "sample test");

capabilities.setCapability("network", true); // To enable network logs

capabilities.setCapability("visual", true);

capabilities.setCapability("video", true); // To enable video recording`

capabilities.setCapability("console", true); // To capture console logs

capabilities.setCapability("selenium_version","3.4.0");

capabilities.merge(options);

try {

driver = new RemoteWebDriver(new URL("https://" + username + ":" + accesskey + gridURL), capabilities);

} catch (MalformedURLException e) {

System.out.println("Invalid grid URL");

} catch (Exception e) {

System.out.println(e.getMessage());

}

@Test()

public void fileDownload() throws Exception {

try {

driver.get("https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download");

driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

driver.switchTo().frame("iframeResult");

WebElement element = driver.findElement(By.xpath("//a[@href='/images/myw3schoolsimage.jpg']"));

element.click();

Thread.sleep(4000);

Assert.assertEquals(((JavascriptExecutor) driver).executeScript("lambda-file-exists=myw3schoolsimage.jpg"), true); //file exist check

System.out.println(((JavascriptExecutor) driver).executeScript("lambda-file-stats=myw3schoolsimage.jpg")); //retrieve file stats

String base64EncodedFile = ((JavascriptExecutor) driver).executeScript("lambda-file-content=myw3schoolsimage.jpg").toString(); // file content download

System.out.println(base64EncodedFile);

byte[] data = Base64.getDecoder().decode(base64EncodedFile);

OutputStream stream = new FileOutputStream("myw3cImage.jpg");

stream.write(data);

} catch (NoSuchElementException e) {

System.out.println(e.getMessage());

SessionId id = driver.getSessionId();

System.out.println("Failed test session id: " + id.toString());

}

@AfterTest

public void tearDown() throws Exception {

if (driver != null) {

((JavascriptExecutor) driver).executeScript("lambda-status=" + status);

driver.quit();

}

Downloading File Using Selenium With Python

import unittest
import time
import base64
from selenium import webdriver
from selenium.webdriver.common.keys import Keys

class LTAutomate(unittest.TestCase):
    
    def setUp(self):
        
        # username: Username can be found at automation dashboard
        username="user_name"  
        # accessToken:  AccessToken can be genarated from automation dashboard or profile section
        accessToken="access_Key"

        # gridUrl: gridUrl can be found at automation dashboard
        gridUrl = "hub.lambdatest.com/wd/hub"
        
        desired_cap = {
            'platform' : "win10", 
            'browserName' : "chrome",
            'version' :  "79.0",
            # Resolution of machine
            "resolution": "1024x768", 
            "name": "sample test",
            "build": "Download functionality test",
            "selenium_version" : "3.4.0",
            "network": True,
            "video": True,
            "visual": True,
            "console": True,
        }

        # URL: https://{username}:{accessToken}@beta-hub.lambdatest.com/wd/hub
        url = "https://"+username+":"+accessToken+"@"+gridUrl
        
        print("Initiating remote driver on platfrom: "+desired_cap["platform"]+" browser: "+desired_cap["browserName"]+" version: "+desired_cap["version"])
        self.driver = webdriver.Remote(
            desired_capabilities=desired_cap,
            command_executor= url
        )

    
    def test_download(self):
       
        driver = self.driver
        print("Driver initiated sucessfully.  Navigate url")
        driver.get("https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download")

        time.sleep(5)
        driver.switch_to.frame('iframeResult')

        elem = driver.find_element_by_xpath("//a[@href='/images/myw3schoolsimage.jpg']")
        elem.click()
        
        #file exists check
        exists_status = driver.execute_script('lambda-file-exists=myw3schoolsimage.jpg')
        print(exists_status)

        # get file stats
        file_properties = driver.execute_script('lambda-file-stats=myw3schoolsimage.jpg')
        print(file_properties)

        # download file-base64
        file_content = driver.execute_script('lambda-file-content=myw3schoolsimage.jpg')
        print(file_content)

        
        data = base64.b64decode(file_content)
        f = open("myw3cImage.jpg", "wb")
        f.write(data)
        driver.execute_script("lambda-status=passed")
        

    
    def tearDown(self):
        """
        Quit selenium driver
        """
        self.driver.quit()

if __name__ == "__main__":
    unittest.main()

import unittest

import time

import base64

from selenium import webdriver

from selenium.webdriver.common.keys import Keys

class LTAutomate(unittest.TestCase):

def setUp(self):

# username: Username can be found at automation dashboard

username="user_name"

# accessToken: AccessToken can be genarated from automation dashboard or profile section

accessToken="access_Key"

# gridUrl: gridUrl can be found at automation dashboard

gridUrl = "hub.lambdatest.com/wd/hub"

desired_cap = {

'platform' : "win10",

'browserName' : "chrome",

'version' : "79.0",

# Resolution of machine

"resolution": "1024x768",

"name": "sample test",

"build": "Download functionality test",

"selenium_version" : "3.4.0",

"network": True,

"video": True,

"visual": True,

"console": True,

}

# URL: https://{username}:{accessToken}@beta-hub.lambdatest.com/wd/hub

url = "https://"+username+":"+accessToken+"@"+gridUrl

print("Initiating remote driver on platfrom: "+desired_cap["platform"]+" browser: "+desired_cap["browserName"]+" version: "+desired_cap["version"])

self.driver = webdriver.Remote(

desired_capabilities=desired_cap,

command_executor= url

)

def test_download(self):

driver = self.driver

print("Driver initiated sucessfully. Navigate url")

driver.get("https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download")

time.sleep(5)

driver.switch_to.frame('iframeResult')

elem = driver.find_element_by_xpath("//a[@href='/images/myw3schoolsimage.jpg']")

elem.click()

#file exists check

exists_status = driver.execute_script('lambda-file-exists=myw3schoolsimage.jpg')

print(exists_status)

# get file stats

file_properties = driver.execute_script('lambda-file-stats=myw3schoolsimage.jpg')

print(file_properties)

# download file-base64

file_content = driver.execute_script('lambda-file-content=myw3schoolsimage.jpg')

print(file_content)

data = base64.b64decode(file_content)

f = open("myw3cImage.jpg", "wb")

f.write(data)

driver.execute_script("lambda-status=passed")

def tearDown(self):

"""

Quit selenium driver

"""

self.driver.quit()

if __name__ == "__main__":

unittest.main()

Downloading File Using Selenium With Node.js

const webdriver = require('selenium-webdriver');

const USERNAME = 'user_name';

dashboard or profile section
const KEY = 'access_Key';

// gridUrl: gridUrl can be found at automation dashboard
const GRID_HOST = 'hub.lambdatest.com/wd/hub';

const fs = require('fs');

function downloadFeature() {

    // Setup Input capabilities
    const capabilities = {
        platform: 'windows 10',
        browserName: 'chrome',
        version: '79.0',
        resolution: '1280x800',
        network: true,
        visual: true,
        console: true,
        video: true,
        name: 'Test 1', // name of the test
        build: 'NodeJS build' // name of the build
    }

    
    const gridUrl = 'https://' + USERNAME + ':' + KEY + '@' + GRID_HOST;

     
    const driver = new webdriver.Builder()
        .usingServer(gridUrl)
        .withCapabilities(capabilities)
        .build();

    
    driver.get('https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download').then(function() {
      driver.switchTo().frame("iframeResult").then(function() {
        driver.findElement(webdriver.By.xpath("//a[@href='/images/myw3schoolsimage.jpg']")).click().then(function() {
            driver.getTitle().then(function(title) {
                // check if file exists
  driver.executeScript('lambda-file-exists=myw3schoolsimage.jpg').then(function(file_exists){
    console.log(file_exists);
  })// get file stats
  driver.executeScript('lambda-file-stats=myw3schoolsimage.jpg').then(function(file_properties) {
    console.log(file_properties);
  })
  // get file base64
  driver.executeScript('lambda-file-content=myw3schoolsimage.jpg').then(function(get_file_content) {
    fs.writeFile('myfile.jpg', get_file_content, {encoding: 'base64'}, function(err) {
      console.log(get_file_content.toString('base64'));
      
    });
  })

  driver.quit();

            });
          });
        });
      })
    .catch(function(err){
        console.log("test failed with reason "+err)
        driver.executeScript('lambda-status=failed');
        driver.quit();
    });
}
downloadFeature();

const webdriver = require('selenium-webdriver');

const USERNAME = 'user_name';

dashboard or profile section

const KEY = 'access_Key';

// gridUrl: gridUrl can be found at automation dashboard

const GRID_HOST = 'hub.lambdatest.com/wd/hub';

const fs = require('fs');

function downloadFeature() {

// Setup Input capabilities

const capabilities = {

platform: 'windows 10',

browserName: 'chrome',

version: '79.0',

resolution: '1280x800',

network: true,

visual: true,

console: true,

video: true,

name: 'Test 1', // name of the test

build: 'NodeJS build' // name of the build

}

const gridUrl = 'https://' + USERNAME + ':' + KEY + '@' + GRID_HOST;

const driver = new webdriver.Builder()

.usingServer(gridUrl)

.withCapabilities(capabilities)

.build();

driver.get('https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download').then(function() {

driver.switchTo().frame("iframeResult").then(function() {

driver.findElement(webdriver.By.xpath("//a[@href='/images/myw3schoolsimage.jpg']")).click().then(function() {

driver.getTitle().then(function(title) {

// check if file exists

driver.executeScript('lambda-file-exists=myw3schoolsimage.jpg').then(function(file_exists){

console.log(file_exists);

})// get file stats

driver.executeScript('lambda-file-stats=myw3schoolsimage.jpg').then(function(file_properties) {

console.log(file_properties);

})

// get file base64

driver.executeScript('lambda-file-content=myw3schoolsimage.jpg').then(function(get_file_content) {

fs.writeFile('myfile.jpg', get_file_content, {encoding: 'base64'}, function(err) {

console.log(get_file_content.toString('base64'));

});

})

driver.quit();

});

})

.catch(function(err){

console.log("test failed with reason "+err)

driver.executeScript('lambda-status=failed');

driver.quit();

});

}

downloadFeature();

Got Questions? Give a shout to us. We’re here for you 24/7. Happy testing! 🙂