Run Doodler through proxy URL for Jupyter Hub

[jmdelvecchio]

Hello, just a feature request and really just in case someone is a whiz at this:

Jupyter Hubs remove burden of installing and managing software but present new issues 🤣 We figured out how to expose ports on JHub to open a web browser for a certain port (e.g. https://jhub.higheredinstitution.edu/user-redirect/proxy/8050/). The resulting webpage displays "Loading..." and the tab is now named "Dash" but perhaps the dash/flask app needs some tweaking to run through a proxy server. Any ideas/experience?

Specific steps:

• Doodler environment already built on virtual image
• Launch a terminal in the Notebook Server
• Clone Dash Doodler git repo: git clone https://github.com/Doodleverse/dash_doodler.git
• Launch Dash Doodler: cd dash_doodler/; python doodler.py
• Access the proxy in a new tab: https://jhub.higheredinstitution.edu/user-redirect/proxy/8050/
• Web page displays "Loading..."

[dbuscombe-usgs]

Hi @jmdelvecchio, I wish I was a whizz at this .....

In https://github.com/Doodleverse/dash_doodler/blob/main/environment/settings.py , are you using an IP of "0.0.0.0", rather than localhost, for deployment? In there, you could also set DEBUG to True for graphic server error messages. Also, perhaps 'threaded' may need to be set to False?

Let me know if that gets you any closer? Cool development! Definitely interested in helping you get this working (and learning more)

[dbuscombe-usgs]

Also, note that I use Flask as a backend server, on line https://github.com/Doodleverse/dash_doodler/blob/main/app.py#L250.

You'll see that I have commented out an alternative method

app = dash.Dash(__name__)

which I think uses the built-in dash server. I can't remember now the relative advantages/disadvantages ...

[dbuscombe-usgs]

I also wonder if it is easier to deploy holodoodler .... https://github.com/Doodleverse/holodoodler