ChromeOptions To Not Prompt For Download When Running RemoteDriver - ruby

Question

I'm trying to debug why when running remote webdriver tests on a headless linux host download dialogs are presented in chrome. I believe the chrome version is 45.
Couple of Env Details
Selenium 2.53 (gem)
Selenium 2.53 Server Jar
Chrome Driver 2.21
The framework/Tests are written in Ruby utilizing Capybara for driving web tests. Here is a brief snippet of how the remote driver is initialized.
prefernces = {
:download => {
:prompt_for_download => false,
:default_directory => '/home/john.doe/Downloads/'
}
}
caps = Selenium::WebDriver::Remote::Capabilities.chrome()
caps['chromeOptions'] = {'prefs' => prefernces}
http_client = Selenium::WebDriver::Remote::Http::Default.new
http_client.timeout = 240
options = {
browser: :remote,
url: "http://<server_url>:4444/wd/hub",
desired_capabilities: caps,
http_client: http_client
}
# Returns Remote Driver
Capybara::Selenium::Driver.new(app, options)
I have verified via the hub that the chromeOptions are set, but when a file is downloaded, we're presented with a file dialog prompt.
I've burned the candle looking for a solution to this problem. Thanks for the help and consideration!

Answer 1

try removing the / from the end of the default_directory and also setting directory_upgrade: true. Other than that make sure the browser has permission to write to the selected directory (note also the correct spelling of preferences)
preferences = {
:download => {
:default_directory => '/home/john.doe/Downloads',
:directory_upgrade => true,
:prompt_for_download => false,
}
}
caps = Selenium::WebDriver::Remote::Capabilities.chrome(
'chromeOptions' => {'prefs' => preferences}
)

Answer 2

Here is an example to download a file with Capybara / Selenium / Chrome :
require 'capybara'
require 'selenium-webdriver'
Capybara.register_driver :chrome do |app|
Capybara::Selenium::Driver.new(app,
:url => "http://localhost:4444/wd/hub",
:browser => :chrome,
:desired_capabilities => Selenium::WebDriver::Remote::Capabilities.chrome(
'chromeOptions' => {
'prefs' => {
'download.default_directory' => File.expand_path("C:\\Download"),
'download.directory_upgrade' => true,
'download.prompt_for_download' => false,
'plugins.plugins_disabled' => ["Chrome PDF Viewer"]
}
}
)
)
end
session = Capybara::Session.new(:chrome)
session.visit "https://www.mozilla.org/en-US/foundation/documents"
session.click_link "IRS Form 872-C"
sleep 20