Request files

As a very simple example let us create an app that allows the user to pick some files from a folder in your Google Drive and send the selected files by email.


  • Create a very simple first app


  • You have already added Ultradox to your account so that you can create new Ultradox files from Google Drive


  • Get your first app up and running


Visit to launch Ultradox. If you are not signed in to Ultradox, you'll be redirected to a page that introduces Ultradox. Click on the Login button to login with your Google account. Select Blank and wait until the blank project opens. A welcome wizard will ask what kind of app you want to create.

Create a new Ultradox file

Create a new Ultradox file from Google Drive and create a blank app.

Click on the document title and enter a reasonable name and description.
Note that the name and description of the file will be displayed to the user accessing your app on the login screen.

Let user pick files

Let user pick one file from folder given folder

Add a Pick file(s) building block from the Google Drive section in the sidebar to your flow.

Click on the bold text in the title of the building block to open the configuration dialog.

You can then enter a title and prompt that will be displayed to the user.

Leave the buttons field blank for now and the default submit button will show up.

Click on one file to switch to multiple files and click on given folder to pick the folder containing the documents that the user can then select.

Your building block should now look like this:

Let user pick multiple files from folder Invoices

Send requested files by email

Send email with subject Your requested files to ${}

Next we want to send out the selected files by email to the user.[a][b][c][d][e][f]

Add a Plain text email block from the Email section in the sidebar to your flow.

Enter ${} into the to field as we want to send the files to the user who is accessing the app.

Enter a subject and body to your email and make sure the checkbox for the attachments is checked.


Ultradox only knows the variables that are listed under the output variables. In our case, only the output variables of the Pick file(s) building block are selected.

To display the variable and all other runtime variables in the autocompletion, add an Environment variables building block to the beginning of your automation.

Test your app

The app is complete and you can test your flow by clicking on the Run icon in the main toolbar. You will be prompted to select some files and will receive an email then.
But let’s now publish the

Configure and activate the app

Click on the settings icon in the main toolbar to activate the app.

Enable the app and restrict it to signed in users, pick a theme and a background image of your choice.

Now we are ready to go! Click on run app to open the app in a new browser tab.

Share the URL of this new tab with the users of your app.

Run app


When opening the link you / they will land on the login page.

As we have restricted the app to logged in users, they will have to login user their Google account.

When allowing anonymous access the login page will never show up, but the app will be launched right away.

Select files

After logging in the user can select a number of files from your folder.


After selecting the files the user of the app will receive the selected files by email and the app is complete.

Congratulations! You have created and run your first Ultradox app!

Improving your app

You have learned that you can build a powerful app by just using two building blocks!

Now let’s add some icing to the app to improve the user experience even more.


Add a Notification block from the User Interaction section right after the Pick file(s) block.
This will display a notification at the bottom of the browser window when running the app.

In our example we want to notify the user once the files are downloaded from Google Drive.

Improving your buttons

You can define a number of buttons and optionally a condition when this button will be active.

In this tutorial we will use an Email button that will be active if one or more files are selected by the user (more than zero).

Open in the Pick file(s) block the let user pick dialogue and enter the button

email("Get files by email")[>0]

Display confirmation message

Finally we want to display a customized confirmation message once the app has completed.
Add a
Stop block from the Control flow section to the end of your flow, click on the  user interaction icon to enter a useful message that replaces the default message when the app has finished.

Enter the prompt

An email with files attached has been sent to your email address [email protected].

You should find it in your inbox shortly.

The app is complete!

The improved app is complete and should look like this:

Let user pick multiple files from folder Invoices

${files.length} files have been downloaded

Send email with subject Your requested files to ${}

Stop execution

Launch your app again by reloading it or by clicking on the run app button once again.
You should see a nice notification that looks great on desktop and mobile devices after selecting the files to be downloaded and you will find the customized success message after the app is complete.

What you have learned

  • You have created a simple yet powerful app by combining just two building blocks: Downloading files from Google Drive and sending them by email
  • You have improved the app by sending notifications to the user using a comment and by adding a custom success message

Learn more

To continue learning about Ultradox, take a look at the following resources:

[a]Next we want to send out the selected files by email to the user.

[b]_Marked as resolved_



[e]_Marked as resolved_


Questions and Feedback

If you have any comments on this page, feel free to add suggestions right to the Google document that we are using to create this site.

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Last Updated: 9/19/19