Incorrect CORS blocking about jupyter HOT 4 CLOSED

The server-side checks origin as well, because browsers do not do cross-origin checks for websockets. If you want the server to allow cross-origin access, you must specify that it should do so with:

c.NotebookApp.allow_origin = '*'

in your jupyter_notebook_config.py.

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I'm pretty sure there's a config option to allow requests from any origin - someone who knows that stuff better will be able to tell you what it is.

But we'd probably recommend that you do always run Jupyter in a profile without that extension, rather than disabling the security. If I understand what the extension is doing correctly, using it along with Jupyter is opening a major security hole - it potentially lets any website you visit run arbitrary code on your computer.

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@minrk thx! I look around lot of issue then find the correct answer on you! It solved my problem!

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This issue has been mentioned on Jupyter Community Forum. There might be relevant details there:

https://discourse.jupyter.org/t/get-origin-of-the-request-in-notebook-config-py/7054/2

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