Hi all
I am trying to configure a Binder file so the notebook it runs would accept file uploads larger than 10Mb, with the ipywidget.
From this issue I learned this was due to a Tornado limitation and indeed I managed to fix this locally by generating a jupyter_notebook_config.py file and then editing the appropriate line to
c.NotebookApp.tornado_settings = {"websocket_max_message_size": 100 * 1024 * 1024}
However I don’t know how to do the same for Binder, particularly through postBuild.
Can anyone help?
Thank you!
Hi @pdehaye,
this is probably not the cleanest way to do it but it works: I generate and modify the jupyter_notebook_config.py file locally and upload it to Github. Then in postBuild I just copy that file to the right place. With that I manage to upload images of a few tens of Mb in the Binder session. Above that, uploading stalls.
You can find an example here: https://github.com/guiwitz/voila_image_processing/tree/master/
In this example, if you click on the Binder badge it will open a Voilà dashboard (https://github.com/voila-dashboards/voila) that works with ipywidgets. If you want a regular Jupyter session you can just take the regular route via the mybinder.org site.
I hope that helps!
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Hi @guiwitz
I added the line cp jupyter_notebook_config.py ~/.jupyter/ to postBuild but it doesn’t seem to change anything…
Do you happen to know how I could test the configuration is effectively changed from a running notebook?
I think I made a mistake. The configuration file is supposed to be in ~/.jupyter but the folder doesn’t exist by default, and therefore the file is never really copied and used.
I modified the repository. Now the .jupyter folder containing the configuration file is simply at the base of the repository. No need of postBuild anymore. I set a limit at 100Mb in the repository and I just tried now successfully to upload an 80Mb file. When using jupyter --paths you can see that the configuration file in ~/.jupyter should be the one effectively used. I don’t know however how to get configuration values. The docs only explain how to set them but not how to get them (https://jupyter.readthedocs.io/en/latest/projects/config.html#command-line-options-for-configuration)
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That makes sense for the cp error. I now corrected that, with the file in the right(?) place right away.
Unfortunately, it still doesn’t work for me 
And it seems to definitely be related to file size.
Do you have a link to the repository you are using ?
For some reason, you have a trailing space at the end of the jupyter_config.py file that shouldn’t be there and that makes it unusable. I forked your repo, fixed the typo, ran it on Binder, and managed to upload files without trouble.
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