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The backend—i.e. core services, APIs, and REST endpoints—to Jupyter web applications.

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### Problem Currently the main method prometheus metrics are exposed for scraping is that they are served unauthenticated on the main port https://github.com/jupyter-server/jupyter_server/pull/344 If the notebook is exposed to the...

enhancement

Jupyter Server implementation of [this JEP](https://github.com/jupyter/enhancement-proposals/issues/117) - Adds a new API endpoint for restarting kernels in place - Passes a boolean restart_in_place flag through MappingKernelManager

## Description Not sure if this is the `jupyter_server`'s bug. Recent jupyter may have some breaking changes on the config file. Some plugin with `notebook.services.contents.filemanager.FileContentsManager` cannot be recognized when configured...

bug

## Description Test `jupyterlab_server` CI step fails (see all latest runs on main, for example [this](https://github.com/jupyter-server/jupyter_server/actions/runs/5564144315/jobs/10163559349)) because `jsonschema.RefResolver` is deprecated as of v4.18.0, in favor of the https://github.com/python-jsonschema/referencing library: >...

bug

## Description When the `default_url` contains a hash (aka fragment) (our app uses vue-router with hash-based routing), e.g. `default_url = /foo/#/workspace`, there is a discrepancy between the full URL logged...

bug

## Description It's possible that I'm just doing something wrong but this behavior seems related to other issues so I'm posting it as a bug. I'm using SSH port forwarding...

bug

## Description During kernel resart, interrupting causes server side 500 error and client side `Error: Unhandled Error` https://user-images.githubusercontent.com/4434752/227858715-2ee65575-3a25-4bf2-9eae-3f5c3ab17247.mp4 Binder for the video: https://mybinder.org/v2/gh/binder-project/binder/HEAD (well, it is easily reproducable widly) Chrome...

bug

## Description ![error](https://github.com/jupyter-server/jupyter_server/assets/133002451/3332063f-4c06-4d1d-82cd-48f407a83dbf) ## Reproduce 1. Go to 'folder in file explorer' 2. Click on 'URL bar, type CMD' 3. Type 'python -m jupyterlab' 4. See error '- check screenshot...

bug

This change adds support for kernelspec managers to be configured with renaming patterns that they will apply to the kernelspecs they serve. That, in turn, will be used a future...

enhancement

### Problem The `IdentityHandler` expects `GET /api/me` to have a ["permissions" query parameter](https://github.com/jupyter-server/jupyter_server/blob/9106e059f74353701621fd83e39584a910060ce0/jupyter_server/services/api/handlers.py#L72) whose value is a stringified JSON blob. From a user point of view, this looks like an...

enhancement