Common App Frameworks

Domino can run apps built in a variety of popular frameworks. Below are minimal examples that demonstrate how to start each supported type of app. These are intended to help you get a working stub up and running quickly.

Port selection is flexible and port 8888 is no longer required.

Dash (Python)

Dash is a lightweight Python framework for building interactive analytic apps with Plotly visualizations.

import dash

app = dash.Dash(__name__, routes_pathname_prefix='/')
if __name__ == '__main__':
    app.run(port=8888, host='0.0.0.0', debug=True)

Make sure dash is installed in your environment.
Use routes_pathname_prefix='/' for proper routing inside Domino.

Streamlit (Python)

Streamlit is a rapid app framework for turning Python scripts into shareable web apps with minimal code.

import streamlit as st

st.title("Minimal Streamlit App")
st.write("Hello from Domino!")

In your .sh file, launch with:

streamlit run app.py --server.port=8888 --server.address=0.0.0.0

Streamlit apps require a separate .sh such as app.sh startup script.
You can configure the route prefix using DOMINO_RUN_HOST_PATH.

Flask (Python)

Flask is a lightweight Python web framework that is ideal for creating custom endpoints or fully bespoke applications.

from flask import Flask
import os

app = Flask(__name__)

@app.route("/")
def index():
    return "Hello from Flask in Domino!"

if __name__ == '__main__':
    app.run(port=8888, host='0.0.0.0')

Works out of the box with Domino’s routing and identity headers.

Shiny (R)

Shiny is R’s standard framework for building interactive web applications with reactive components.

Option 1: Inline R script

shiny::runApp("./", port = 8888, host = "0.0.0.0")

Option 2: Shell script to launch Shiny

In your .sh file:

R -e 'shiny::runApp("./", port=8888, host="0.0.0.0")'

Note the following:

In the past, Shiny had to run on localhost:8888 to work in Domino. However, port selection is now flexible and port 8888 is no longer required.
User-level identity headers are only supported by Shiny Server Pro.

These minimal examples are designed to help you quickly stand up a working app in Domino using your preferred framework. Each framework has specific requirements for launch behavior and routing, but all follow the same basic pattern.

Next steps

Apps in Domino gives an overview of how apps work within the Domino ecosystem.
Create and Publish an App has instructions on creating and publishing your Apps, customizing the App’s URL, and sharing Apps with authorized users.
Learn more about how Apps in Domino run and what identity and permissions are used.

Core Concepts

Features

Common App Frameworks

Dash (Python)

Streamlit (Python)

Flask (Python)

Shiny (R)

Option 1: Inline R script

Option 2: Shell script to launch Shiny

Next steps

​Dash (Python)

​Streamlit (Python)

​Flask (Python)

​Shiny (R)

​Option 1: Inline R script

​Option 2: Shell script to launch Shiny

​Next steps

Dash (Python)

Streamlit (Python)

Flask (Python)

Shiny (R)

Option 1: Inline R script

Option 2: Shell script to launch Shiny

Next steps