How to get URL of current Jupyter notebook?

General Usage
3

So, I’m still a little stumped at how that information would get you to a full url.

in julia,

> readlines(open(IJulia.connection_file))

12-element Array{String,1}:
 "{"                                                
 "  \"shell_port\": 45415,"                         
 "  \"iopub_port\": 56344,"                         
 "  \"stdin_port\": 55505,"                         
 "  \"control_port\": 34104,"                       
 "  \"hb_port\": 55104,"                            
 "  \"ip\": \"127.0.0.1\","                         
 "  \"key\": \"8f542a78-191098430b8bad7b07401613\","
 "  \"transport\": \"tcp\","                        
 "  \"signature_scheme\": \"hmac-sha256\","         
 "  \"kernel_name\": \"julia-0.6\""                 
 "}"

in python,

> get_notebook_name()

/home/jovyan/Carthage.jl.ipynb

With the following found in the process:

{'base_url': '/user/djsegal-carthage-binder-9195qzmy/', 'hostname': '0.0.0.0', 'notebook_dir': '/home/jovyan', 'password': False, 'pid': 1, 'port': 8888, 'secure': False, 'token': 'j03TaCw7Qoun35S4-dCtjQ', 'url': 'http://0.0.0.0:8888/user/djsegal-carthage-binder-9195qzmy/'}

{'id': 'f10cccfe-449b-4f75-a91c-997ed9cc6952', 'path': 'Carthage.jl.ipynb', 'name': '', 'type': 'notebook', 'kernel': {'id': '38a072d1-ceed-4874-aa37-8da41a659dd4', 'name': 'python3', 'last_activity': '2018-03-21T18:06:35.476223Z', 'execution_state': 'busy', 'connections': 1}, 'notebook': {'path': 'Carthage.jl.ipynb', 'name': ''}}

Do you know any other puzzle pieces that might exist?