Add share link support for beta viewer

[brentyi]

This PR adds initial support for shareable links to the beta viewer.

Link generation can be enabled via --share True on either ns-train or ns-viewer. For example,

ns-train nerfacto --data ./data/nerfstudio/person --vis viewer_beta --share True

wil print:

Which, thanks @jonahbedouch's efforts on mobile support, we can open on a phone!

An example URL is https://edge-based-relational-7462.share.viser.studio, which I'll keep up for a few hours if anybody wants to check that they can access it.

Once the final beta viewer features are stable, this can also help with Colab tunnel issues + various port forward-related roadblocks that folks seem to be having (#1908 #2433 #2439).

[tancik]

This is very cool! Could we add the share link to the rich table instead of as new line?

[brentyi]

This is what I had originally; the reason I switched it is that the share link can take a second or two to generate. I can flip it back in viser, but if we choose to include it in the table:

• The table printing will be delayed by a bit.
• We would need to decide whether to block until the share URL is ready or return immediately, then do the print later from a background thread. The latter is obviously preferred for saving time, but I'm concerned about how printing a lot of stuff interacts with things like tqdm progress bars (probably it's OK).

[tancik]

Eventually I kinda want to make the share option opt-out and have it front and center in the table. I wasn't aware that it had a lag, though a couple of seconds is pretty short. Thoughts?

[brentyi]

Okay, let's include it in the table! I can add it to the viser to-do list.

I just measured the delay and it's much faster now, ~0.15 seconds, so this is possibly a non-issue. It probably helps that I'm on Ethernet now.

[kerrj]

IMO we should rename "share" in the config to something like "public-viewer" or something more descriptive

[brentyi]

I'm okay with something like --create-share-url True?

[kerrj]

nice

[smart4654154]

Thank you very much for your work. I use: C:\Users\zzl\erfstudio\outputs\kitchen\erfacto\2024-01-25_131124\config.yml --vis viewer_ Beta
I click http://0.0.0.0:7007/, and browser display can't reach.

When I use ns viewer -- load configuration C:\Users\zzl\erfstudio\outputs\kitchen\erfacto\2024-01-25_131124\config.yml --vis viewer_ Beta --viewer.make-share-url True. I can obtain new connections and open it

Does this mean that --viewer.make-share-url is an effective solution to my problem?
(I am a beginner and English is poor, and my question may be a simple one.Thank you very much for your help.)

[jonahbedouch]

Hi! It's currently a known bug that some browsers cannot recognize the 0.0.0.0 url. You can try manually typing in http://localhost: followed by the port that viser spits out into your browser, or you can try to utilize the shared link feature if that doesn't work.