osm-login-python

Package to manage OAuth 2.0 login for OSM in Python.

📖 Documentation

Install with pip

pip install osm-login-python

Import Auth and initialize class with your credentials

from osm_login_python.core import Auth

osm_auth=Auth(
    osm_url=YOUR_OSM_URL,
    client_id=YOUR_OSM_CLIENT_ID,
    client_secret=YOUR_OSM_CLIENT_SECRET,
    secret_key=YOUR_OSM_SECRET_KEY,
    login_redirect_uri=YOUR_OSM_LOGIN_REDIRECT_URI,
    scope=YOUR_OSM_SCOPE_LIST,
)

Usage

Three functions are provided:

1. login() -- Returns the login url for OSM.

   • The user must then access this URL and authorize the OAuth application to login.
   • The user will be redirected to the configured login_redirect_uri after successful login with OSM.
   • The web page must then call the callback() function below, sending the current URL to the function (which includes the OAuth authorization code).

2. callback() -- Returns the encoded and serialized data:

   • user_data a JSON of OSM user data.
   • oauth_token a string OSM OAuth token.
   • Both are encoded and serialized as an additional safety measure when used in URLs.

3. deserialize_data() -- returns decoded and deserialized data from callback().

[!NOTE] This package is primarily intended to return OSM user data.

It is also possible to obtain the oauth_token as described above, for making authenticated requests against the OSM API from within a secure backend service.

To use the OAuth token in a frontend please use caution and adhere to best practice security, such as embedding in a secure httpOnly cookie (do not store in localStorage, sessionStorage, or unsecure cookies).

Example

In Django:

import json
from django.conf import settings
from osm_login_python.core import Auth
from django.http import JsonResponse

# initialize osm_auth with our credentials
osm_auth = Auth(
    osm_url=YOUR_OSM_URL,
    client_id=YOUR_OSM_CLIENT_ID,
    client_secret=YOUR_OSM_CLIENT_SECRET,
    secret_key=YOUR_OSM_SECRET_KEY,
    login_redirect_uri=YOUR_OSM_LOGIN_REDIRECT_URI,
    scope=YOUR_OSM_SCOPE,
)

def login(request):
    login_url = osm_auth.login()
    return JsonResponse(login_url)

def callback(request):
    # Generating token through osm_auth library method
    token = osm_auth.callback(request.build_absolute_uri())
    return JsonResponse(token)

def get_my_data(request, serialized_user_data: str):
    user_data = osm_auth.deserialize_data(serialized_user_data)
    return JsonResponse(user_data)

• Django integration example here https://github.com/hotosm/fAIr/tree/master/backend/login

• FastAPI integration example here https://github.com/hotosm/export-tool-api/tree/develop/API/auth

Version Control

Use commitizen for version control.

Test Coverage

Generate a coverage badge:

pdm install
pdm run coverage run -m pytest
# pdm run coverage report
pdm run coverage coverage-badge -o docs/coverage.svg

Contribute

Contributions are welcome!