Firefox not launching jupyter session properly

[brett stevens]

I am running Ubuntu 21.10 on a Lenovo Thinkpad X1 Tablet.  I installed SageMath on my computer by cloning the git repository. I compiled sage using directions in README.md. The most recent version I compiled was SageMath 9.4. I use Firefox 98.0.2 (64-bit) as my browser. 

When I run ```sage -n jupyter file.ipynb```  A new tab opens in firefox with address ```file:///tmp/tmp9csp8qpp.html``` but Firefox reports

> File not found
>
> Firefox can’t find the file at
> /tmp/tmp9csp8qpp.html.
>
>     Check the file name for capitalization or other typing errors.
>     Check to see if the file was moved, renamed or deleted.

However the file does exist.  ```ls -l /tmp/tmp9csp8qpp.html``` returns

> -rw------- 1 brett brett 751 Mar 25 10:15 /tmp/tmp9csp8qpp.html

If I open the file in Firefox directly using ```Open File...``` from the File menu everything works fine.


When I run ```sage -n jupyter file.ipynb``` I get some other links in the terminal to use for opening the jupyter session in my browser:

>     To access the notebook, open this file in a browser:
>         file:///home/brett/.local/share/jupyter/runtime/nbserver-101452-open.html
>     Or copy and paste one of these URLs:
>         http://hamm:8888/?token=cb4036e78faba0faa3bd0d50b73cc7a94e302196c474d878
>      or http://127.0.0.1:8888/?token=cb4036e78faba0faa3bd0d50b73cc7a94e302196c474d878

If I open the first of these, Firefox reports

> Access to the file was denied
>
> The file at
> /home/brett/.local/share/jupyter/runtime/nbserver-101452-open.html
> is not readable.
>
>     It may have been removed, moved, or file permissions may be preventing access.

However I have both read and write privileges for this file: ```ls -l /home/brett/.local/share/jupyter/runtime/nbserver-101452-open.html``` returns

> -rw-rw-r-- 1 brett brett 667 Mar 25 10:15 /home/brett/.local/share/jupyter/runtime/nbserver-101452-open.html

I tried changing the privileges to include ```x``` but Firefox still will not open it.

Like above if I open the file in Firefox using ```Open File...``` from the File menu everything works fine.

[Dima Pasechnik]

On Mon, Mar 28, 2022 at 2:18 PM brett stevens <bret...@gmail.com> wrote:
>
> I am running Ubuntu 21.10 on a Lenovo Thinkpad X1 Tablet. I installed SageMath on my computer by cloning the git repository. I compiled sage using directions in README.md. The most recent version I compiled was SageMath 9.4. I use Firefox 98.0.2 (64-bit) as my browser.
>
> When I run ```sage -n jupyter file.ipynb```

Such a way of opening a particular notebook is not supported, at least it
does not seem to be documented (in sage -n --help).

Needless so say, "sage -n" opens a page with the current directory
listed, and you can
then click on a particular notebook to open.

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[Henri Girard]

https://github.com/jupyter/notebook/issues/1979

Maybe this issue ?

[Dima Pasechnik]

On Mon, Mar 28, 2022 at 4:22 PM Henri Girard <henri....@gmail.com> wrote:
>
> https://github.com/jupyter/notebook/issues/1979
>
> Maybe this issue ?

no, that is about jupyter notebook server.

Here, the issue is how to bypass the intermediate step of launching
a notebook server, and open a particular notebook directly.
In some environment this can be done by just clicking on a notebook
file in a file browser.
E.g. this can be used to run notebooks in VSCode (see
https://trac.sagemath.org/ticket/30484)

> To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/1454b01d-2c56-3d2c-94b0-92e4f230c689%40gmail.com.

[brett stevens]

When I run ```sage -n``` the same thing happens:  The page that opens in Firefox says

> Access to the file was denied

> The file at /home/brett/.local/share/jupyter/runtime/nbserver-35966-open.html is not readable.

>     It may have been removed, moved, or file permissions may be preventing access.

[brett stevens]

It is not the password issue that HG suggested.  Nor is it an issue with specifically trying to open a file rather than have a directory open in jupyter.  The issue is that Firefox claims to not be able to read the file that it is passed.  But the file exists with suitable permissions and if I use ```Open File...```  Firefox **can** access/read the file.  It used to be that when I ran ```sage -n``` or ```sage -n jupyter file.ipynb``` either the directory or the specific file, respectively, would successfully appear in the tab that opens in Firefox, but now I am getting the

> file not found

error.

[Henri Girard]

Yes Brett that exactly what I wanted to say... But I forget where I found the correction on internet and as I don't speak english too much, I didn't explain well the problem. I got the same problem with ubuntu for about one month now. there is a file python config and inside change  c.... =False to true

But it has been corrected in the new ubuntu 22.04 that's why I forget the problem sorry...

To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/c6423234-d9d7-4690-84f4-447d67410f63n%40googlegroups.com.

[Dima Pasechnik]

On Tue, Mar 29, 2022 at 6:15 AM brett stevens <bret...@gmail.com> wrote:
>
> It is not the password issue that HG suggested. Nor is it an issue with specifically trying to open a file rather than have a directory open in jupyter. The issue is that Firefox claims to not be able to read the file that it is passed. But the file exists with suitable permissions and if I use ```Open File...``` Firefox **can** access/read the file. It used to be that when I ran ```sage -n``` or ```sage -n jupyter file.ipynb``` either the directory or the specific file, respectively, would successfully appear in the tab that opens in Firefox, but now I am getting the
> > file not found
> error.

it's an issue with your Firefox setup (or a new feature), not a
general Firefox/Sage feature/bug.

E.g. on Gentoo with its Firefox (97.0.1) I can do

./sage -n jupyter ../sage-clang/u1.ipynb

and u1 gets opened, although I see a warning:

[W 08:45:52.113 NotebookApp] Notebook u1.ipynb is not trusted

I can remove this warning by running in Sage's shell (i.e. at ./sage -sh prompt)

jupyter trust u1.ipynb


By the way, I can see the same kind of error as you describe on
ChromeOS (running Sage in a VM)
There "./sage -n jupyter" works, and opens the directory in Chrome browser,
but "./sage -n jupyter u1.ipynb" errors out with "permission denied"

Apparently some kind of sandboxing goes on here.

You might try that "jupyter trust <nb name>" as above, and see if it helps.
Also, I'd try installing jupyterlab

make jupyterlab

which is actually more up to date than the classic (and deprecated by
upstream) Jupyter notebook,
and see if the error goes away.

> To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/c6423234-d9d7-4690-84f4-447d67410f63n%40googlegroups.com.

[Dima Pasechnik]

On Tue, Mar 29, 2022 at 6:12 AM brett stevens <bret...@gmail.com> wrote:
>
> When I run ```sage -n``` the same thing happens: The page that opens in Firefox says
> > Access to the file was denied
> > The file at /home/brett/.local/share/jupyter/runtime/nbserver-35966-open.html is not readable.
> > It may have been removed, moved, or file permissions may be preventing access.

Does system-wide jupyter (apt-get install jupyter) package work for
your Firefox?
If it doesn't, then the problem has little to do with Sage.
(and probably you'd need to fiddle with your Firefox security settings)

If it does, you can use it to run Sage notebooks
- you'd need to run, in Sage'd top directory,

jupyter kernelspec install
local/var/lib/sage/venv-python3.9/share/jupyter/kernels/sagemath

(assuming you have python3.9 (else you'd need to adjust the path accordingly)

> To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/3a0eecf5-c605-473b-be5a-836272cce244n%40googlegroups.com.

[brett stevens]

@dim  I installed Ubuntu's jupyter and I am getting the same problem there so I agree this is not a SageMath problem.  I will post my question to an appropriate forum.  If I find a solution, I will report the fix here.

@HG, I tried setting ```c.NotebookApp.open_browser = True`` but it did not fix the problem.  But thank you for the reference to that thread as it still may be related.

[brett stevens]

The problem seems to be that The Ubuntu Firefox is now installed with a snap which is not given access to dotted files in the user file space and jupyter's redirect file is in ~/.local/  The solution from Stackexchange As Ubuntu is to place the line

> c.NotebookApp.use_redirect_file = False

in the file ```~/.jupyter/jupyter_notebook_config.py```

Thank you all for your help and time.

brett

[brett stevens]

I spoke to soon. :-)  My solution makes the Ubuntu Jupyter work OK  but  ```sage -n``` does not work.  For SageMath's jupyter I needed to make the same change in ```$SAGE_ROOT/local/etc/jupyter/jupyter_notebook_config.py```

On Tuesday, March 29, 2022 at 11:02:52 AM UTC-4 brett stevens wrote:

[Dima Pasechnik]

I've proposed a fix for this on https://trac.sagemath.org/ticket/33592
(there is no reason to use temp files, IMHO)
so we add c.NotebookApp.use_redirect_file=False to the corresponing config file.

Needs review.

> To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/b1e8154a-9813-4189-ab08-47ecfa98d8d6n%40googlegroups.com.

[Henri Girard]

thanks you :)

[brett stevens]

Thanks!