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A Python CAS client

Project Description

A Python CAS (Central Authentication Service) client for interfacing with a CAS service implementation, such as https://github.com/rbCAS/CASino or https://github.com/apereo/cas.

This project provides tools for building well-formed CAS-related URLs, parsing CAS XML payloads and managing the server-side session stores necessary for handling SLO (single logout).

Installation

Supports Python 2.7 and 3.4.

$ git clone git@github.com:discogs/python-cas-client.git
$ cd python-cas-client
python-cas-client$ pip install .
...

Testing

cas_client uses tox to run its unit tests under Python 2.7 and 3.4.

python-cas-client$ tox

Example

The following un-tested pseudo-code shows how you might use cas_client in a Flask project.

from cas_client import CASClient
from flask import Flask, redirect, request, session, url_for

app = Flask(__name__)

app_login_url = 'http://www.my-app.com/login'
cas_url = 'http://cas.my-app.com'
cas_client = CASClient(cas_url, auth_prefix='')

@app.route('/login')
def login():
    ticket = request.args.get('ticket')
    if ticket:
        try:
            cas_response = cas_client.perform_service_validate(
                ticket=ticket,
                service_url=app_login_url,
                )
        except:
            # CAS server is currently broken, try again later.
            return redirect(url_for('root'))
        if cas_response and cas_response.success:
            session['logged-in'] = True
            return redirect(url_for('root'))
    del(session['logged-in'])
    cas_login_url = cas_client.get_login_url(service_url=app_login_url)
    return redirect(cas_login_url)

@app.route('/logout')
def logout():
    del(session['logged-in'])
    cas_logout_url = cas_client.get_logout_url(service_url=app_login_url)
    return redirect(cas_logout_url)

@app.route('/')
def root():
    if session.get('logged-in'):
        return 'You Are Logged In'
    else:
        return 'You Are Not Logged In'

This pseudo-code does not handle server-side session stores or single logout, only the bare minimum for standard login and logout.

Release History

Release History

This version
History Node

0.1.3

History Node

0.1.2

History Node

0.1.1

History Node

0.1.0

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
cas_client-0.1.3.tar.gz (13.2 kB) Copy SHA256 Checksum SHA256 Source Feb 23, 2017

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