File download

[elpddev]

I'm opening a new issue over #121 as it is closed without a definitive solution for my case.

I have a site when pressing a download button, the js do window.open(url, "new_window") which opens another window and then the returned response for the new window is a file download which trigger the browser file saving dialog. The driver I use is either chromedriver or selenium with firefox/chrome.

Is there a way to capture and download that file through Hound?

[danhper]

What is the problem exactly when you try to download the file? I got the following to work with chromedriver without any issue:

iex(1)> Hound.start_session                                                
"3c2ec7f8e9342055509a37b88a450ee0"
iex(2)> use Hound.Helpers                                                  
Hound.Helpers
iex(3)> navigate_to "https://github.com/HashNuke/hound"
nil
iex(4)> click({:css, ".file-navigation .select-menu-button"})              
nil
iex(5)> click({:css, ".get-repo-btn:last-child"})                          
nil
# file got downloaded inside the default download directory

If the issue is that it is opening a file dialog, for chromedriver, you should be able to save the file directly without triggering the dialog by passing the following in chromeOptions:

chromeOptions: %{
    "download" => %{
        "prompt_for_download" => false, 
        "directory_upgrade" => true,
        "default_directory" => "/path/to/download/dir"
    }

let me know how this works for you.

[vjorjo]

@tuvistavie And how do you use chromeOptions?? For example this:

    Hound.start_session(
      driver: %{
        chromeOptions: %{ "download" => %{
            "prompt_for_download" => true,
            "directory_upgrade" => true,
            "default_directory" => System.cwd
        }}
      })

and many other combinations I tried the last 10 hours don't work. Accurate and thorough documentation about these options is absent. Actually, I wasn't able to find any mention about these, except in some discussed issues.

Any help would be greatly appreciated.

[vjorjo]

@tuvistavie I found it. It is something like this:

  Hound.start_session(driver: %{
     browserName: "chrome",
     chromeOptions: %{
         # "args" => ["--headless", "--disable-gpu"],
         "prefs" => %{ "download" => %{
           "prompt_for_download" => true,
           "directory_upgrade" => true,
           "default_directory" => System.cwd
         }}
     }}
   )

[fantypants]

Has anyone got this to work with headless yet? have tried every single suggestion so far

[bertdivvy]

def chrome_headless_session(metadata) do
    {:ok, cwd} = File.cwd()
    downloads_path = Path.join(cwd, "test_downloads")
    Hound.start_session(
      additional_capabilities: %{
        chromeOptions: %{
          "args" => [
            "--user-agent=#{:chrome |> Browser.user_agent() |> Metadata.append(metadata)}",
            "--headless",
            "--disable-gpu"
          ],
          "prefs" => %{ "download" => %{
            "prompt_for_download" => false,
            "directory_upgrade" => true,
            "default_directory" => downloads_path
           }}
        }
      }
    )
  end

I got this to work for me. Hope it helps someone down the road.

[fahrinh]

Has anyone got this to work with headless yet? have tried every single suggestion so far

@fantypants By default, file downloading in headless mode (Chrome, in this case) is prohibited. Try this workaround to enable it:

https://fahrinh.github.io/post/2019-09-16-file-downloading-in-headless-chrome-using-chromedriver-and-hound/