Embedding in iframe

When I try to embedd tljh in iframe with below settings in jupyter_config.py file

c.JupyterHub.tornado_settings = {
    'headers': {
         'Content-Security-Policy': 'frame-ancestors self *',
    }
}
c.Spawner.args = ["'--NotebookApp.tornado_settings={'headers': {'Content-Security-Policy': 'frame-ancestors self * ', }}'"]

I am getting following error when I try to start user server. Any idea what is wrong?

> May 03 14:03:25 instance-5 python3[31964]:     KeyError: "'headers'"
May 03 14:03:25 instance-5 python3[31964]:         USERID=self.user.id
May 03 14:03:25 instance-5 python3[31964]:       File "/opt/tljh/hub/lib/python3.6/site-packages/systemdspawner/systemdspawner.py", line 157, in _expand_user_vars
May 03 14:03:25 instance-5 python3[31964]:         args=[self._expand_user_vars(a) for a in self.get_args()],
May 03 14:03:25 instance-5 python3[31964]:       File "/opt/tljh/hub/lib/python3.6/site-packages/systemdspawner/systemdspawner.py", line 280, in <listcomp>
May 03 14:03:25 instance-5 python3[31964]:         args=[self._expand_user_vars(a) for a in self.get_args()],
May 03 14:03:25 instance-5 python3[31964]:       File "/opt/tljh/hub/lib/python3.6/site-packages/systemdspawner/systemdspawner.py", line 280, in start
May 03 14:03:25 instance-5 python3[31964]:         url = await gen.with_timeout(timedelta(seconds=spawner.start_timeout), f)
May 03 14:03:25 instance-5 python3[31964]:       File "/opt/tljh/hub/lib/python3.6/site-packages/jupyterhub/user.py", line 409, in spawn
May 03 14:03:25 instance-5 python3[31964]:         raise e
May 03 14:03:25 instance-5 python3[31964]:       File "/opt/tljh/hub/lib/python3.6/site-packages/jupyterhub/user.py", line 489, in spawn

[AmalVijayan]

Here is a work around,

1. Have a common notebook configuration file for all the users who log into Jupyterhub.
2. Pass the configuration file as spawner args.

Follow the procedure below:

1. Create a file named jupyter_notebook_config.py in a specific location say /home/shared_config/

You can either create the file manually using a text editor like vim or generate a default coinfig file using jupyter notebook with the following command

jupyter notebook --generate-config

Note that the above command requires jupyter notebook to be installed (pip3 install jupyterhub notebook)

After the installation if you face an error related to ruamel.yaml version on loading the tljh-config, execute the following command: pip3 install ruamel.yaml==0.15.*

1. Open the jupyter_notebook_config.py file that you created above and add the following code:

c.NotebookApp.tornado_settings={'headers': {'Content-Security-Policy': "frame-ancestors * 'self' "}} change the permission of the file using the following code: chmod -R 755 /home/shared_config/jupyter_notebook_config.py

1. Open you jupyterhub configuration file (by default located in /opt/tljh/config/jupyterhub_config.d/jupyterhub_config.py) and add the following code:

Note: you can generate jupyterhub configuration file using the following command: jupyterhub --generate-config

c.Spawner.args = [ '--config=/home/shared_config/jupyter_notebook_config.py']

1. Reload the tljf-config using the following command:

sudo tljf-config reload

1. Happy coding !!

Here is what my config looks like

– /opt/tljh/config/jupyterhub_config.d/jupyterhub_config.py

c.JupyterHub.tornado_settings = {'headers': {'Content-Security-Policy': "frame-ancestors * 'self' "}} c.Spawner.args = [ '--config=/home/ubuntu/jupyter_notebook_config.py']

– /home/shared_config/jupyter_notebook_config.py

c.NotebookApp.tornado_settings={'headers': {'Content-Security-Policy': "frame-ancestors * 'self' "}}

Some useful references and related issues:

• https://jupyterhub.readthedocs.io/en/stable/getting-started/config-basics.html
• https://minrk-notebook.readthedocs.io/en/latest/config.html
• https://jupyterhub.readthedocs.io/en/stable/getting-started/spawners-basics.html
• https://github.com/jupyterhub/jupyterhub/issues/335
• https://github.com/jupyterhub/the-littlest-jupyterhub/issues/312
• https://github.com/jupyter/notebook/issues/3904
• https://github.com/jupyterhub/jupyterhub/issues/379

[kaivalyapendse]

@AmalVijayan Hi Amal, I am facing the same issue. I have replicated your steps but still getting the error as : Blocked autofocusing on a <input> element in a cross-origin subframe. For the pages ahead of the login page. Login page is rendering fine but not able to login.

Could anyone throw some light on this?