Hi Hussein,

Please do drop us a note when you've got something working - even if we
decide not to add it as an option in the notebook, it could well be a
useful example for people who want to do similar things.

Best wishes,
Thomas

On 20 July 2017 at 02:17, Hussein Elgridly <huss...@broadinstitute.org>
wrote:

> Hi Thomas,
>
> This is great. As you suggest I suspect the best thing for us to do here
> would be to add some logging code in the on_message function you linked.
> Our users are limited to the notebooks UI only so that should be sufficient
> for our needs.
>
> I may resurrect this thread in a couple of months if we continue down this
> path to ask if you'd like a PR once we've got something working.
>
> Thank you so much!
> -Hussein
>
> On 19 July 2017 at 07:44, Thomas Kluyver <tak...@gmail.com> wrote:
>
>> Hi Hussein,
>>
>> There isn't a config option for it, but your understanding is correct,
>> and it should be possible to log what is being executed. You can see the
>> messaging protocol description here:
>> https://jupyter-client.readthedocs.io/en/latest/messaging.html
>>
>> The simplest way to do this in some regards is to connect another client
>> to the kernel, which should broadcast each code cell it receives as an
>> execute_input message. However, this depends on the kernel actually doing
>> so, and you'd still need to know when a new kernel was starting up.
>>
>> Perhaps a more robust way would be to insert a bit of extra code into the
>> notebook server. The execute_request message is sent over a websocket by
>> the browser, received by the server, reserialised and sent over ZMQ to the
>> kernel. The code doing that is here:
>> https://github.com/jupyter/notebook/blob/5.0.0/notebook/serv
>> ices/kernels/handlers.py#L278
>>
>> That assumes that your users only have Jupyter access through the
>> notebook; if they can use other Jupyter frontends, like the Qt console,
>> then we'd need to get the messages out somewhere else.
>>
>> Best wishes,
>> Thomas
>>
>> On 16 July 2017 at 16:51, Hussein Elgridly <huss...@broadinstitute.org>
>> wrote:
>>
>>> Hi folks,
>>>
>>> We're standing up a Jupyter (Python right now, will get R later) stack
>>> and everything is going well so far. The wrinkle is that users will be
>>> talking to federal data and our auditors are getting nervous; they want to
>>> know what people are doing.
>>>
>>> If my understanding of the Jupyter architecture is correct, the notebook
>>> server ultimately bundles up the cell contents and sends them to the
>>> backing kernel through 0MQ. Can we hook into this somewhere and write all
>>> such messages to a log?
>>>
>>> If there is a config flag that already does this I am ecstatic; if you
>>> can point me to "make a pull request somewhere around here" that'd work too.
>>>
>>> Thanks,
>>> -Hussein
>>>
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