#!/usr/bin/env python
# coding: utf-8

# All user servers have access to a JUPYTERHUB_API_TOKEN,
# which allows access to the JupyterHub API.

# In[1]:


import os
for key, value in sorted(os.environ.items()):
    if key.startswith('JUPYTERHUB_'):
        print(f"{key}: {value}")


# Make a POST request to /hub/api/onetimetoken authorized with our JUPYTERHUB_API_TOKEN
# in order to create a shareable link.

# In[2]:


import os
import requests
from urllib.parse import urlparse

from jupyterhub.utils import url_path_join

api_token = os.environ['JUPYTERHUB_API_TOKEN']
api_url = os.environ['JUPYTERHUB_API_URL']
base_url = os.environ['JUPYTERHUB_BASE_URL']

onetime_url = url_path_join(api_url, "onetimetoken")
r = requests.post(onetime_url, headers={'Authorization': f'token {api_token}'})
r.raise_for_status()
reply = r.json()
reply


# Now we can make an HTML link that can be shared,
# to grant one-time logins to someone with the link:

# In[8]:


from IPython.display import HTML
HTML(f"<a href={reply['url']}>This is your one-time link</a>")


# Copy that link and share it to allow login as you with one-time tokens.
# The link will only work once.