How can a cell obtain user name from e.g. HttpContext?

[Paul A]

Hi all, I have a user id passed via HttpContext, so in principle the notebook should know who is connecting. I know this is not secure, but should work for "Hey {}".format(context['username']. 

How can I get access to that HttpContext instance?

[MinRK]

Since the kernel is a different process from the server, objects in the server are not available to the kernels. Environment variables can be used to share little bits of information throughout the server and kernels, e.g.

export MY_USERNAME='something'
jupyter notebook

in which case the MY_USERNAME env will be available to the server and all of its kernel subprocesses. If the server doesn’t know its name until some time later, you can modify how kernels are started, to pass this environment variable on each kernel launch.

-MinRK

​

On Tue, Aug 9, 2016 at 2:19 PM, Paul A <rootsum...@gmail.com> wrote:

Hi all, I have a user id passed via HttpContext, so in principle the notebook should know who is connecting. I know this is not secure, but should work for "Hey {}".format(context['username']. 

How can I get access to that HttpContext instance?

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[Paul A]

Sorry, the question was about retrieving the username of the client connection to the notebook.

The server-side username can be easily returned as:

username = jupyter_client.session.Session().msg_header('')['username']

On Tuesday, August 9, 2016 at 2:29:46 PM UTC+1, Min RK wrote:

Since the kernel is a different process from the server, objects in the server are not available to the kernels. Environment variables can be used to share little bits of information throughout the server and kernels, e.g.

export MY_USERNAME='something'
jupyter notebook

in which case the MY_USERNAME env will be available to the server and all of its kernel subprocesses. If the server doesn’t know its name until some time later, you can modify how kernels are started, to pass this environment variable on each kernel launch.

-MinRK

​

On Tue, Aug 9, 2016 at 2:19 PM, Paul A <rootsum...@gmail.com> wrote:

Hi all, I have a user id passed via HttpContext, so in principle the notebook should know who is connecting. I know this is not secure, but should work for "Hey {}".format(context['username']. 

How can I get access to that HttpContext instance?

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[MinRK]

On Tue, Aug 9, 2016 at 4:55 PM, Paul A <rootsum...@gmail.com> wrote:

Sorry, the question was about retrieving the username of the client connection to the notebook.

The server-side username can be easily returned as:

username = jupyter_client.session.Session().msg_header('')['username']

The browser never communicates directly with the kernel. All communication is mediated through the server. The server has access to HTTP headers, etc. It could use this information when starting a kernel to define an environment variable, for instance, when starting the kernel. This could also be done more simply on notebook-server startup, since the server is presumably launched for a given user.

-Min

 

On Tuesday, August 9, 2016 at 2:29:46 PM UTC+1, Min RK wrote:

Since the kernel is a different process from the server, objects in the server are not available to the kernels. Environment variables can be used to share little bits of information throughout the server and kernels, e.g.

export MY_USERNAME='something'
jupyter notebook

in which case the MY_USERNAME env will be available to the server and all of its kernel subprocesses. If the server doesn’t know its name until some time later, you can modify how kernels are started, to pass this environment variable on each kernel launch.

-MinRK

​

On Tue, Aug 9, 2016 at 2:19 PM, Paul A <rootsum...@gmail.com> wrote:

Hi all, I have a user id passed via HttpContext, so in principle the notebook should know who is connecting. I know this is not secure, but should work for "Hey {}".format(context['username']. 

How can I get access to that HttpContext instance?

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[Jonathan Frederic]

I don't recall if you can get a user name from JS Web APIs, but if you can, you should be able to pass it to the kernel using a comm

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