Python-requests interface for Pelican Platform

This project provides requests addons to support HTTP requests to a Pelican Federation.

The main component is a new PelicanAdapter class that handles translating Pelican URIs into HTTP URLs to enable standard GET requests, including looping over Pelican caches.

This project also provides wrappers around requests.get (and friends) and requests.Session to simplify configuring support for Pelican URIs.

Install

To install this project, use pip:

pip install requests-pelican

To include support for SciTokens include the [scitokens] extra:

pip install requests-pelican[scitokens]

Examples

1. Public data

import requests_pelican
print(requests_pelican.get("osdf:///gwdata/zenodo/README.zenodo").text)

2. Private data requiring token authorisation

Requests for data from a Private Pelican federation require a Bearer token. requests-pelican will attempt to automatically discover a valid SciToken before GETting the data.

import requests_pelican
print(requests_pelican.get("osdf:///igwn/ligo/README").text)

3. Integrating with other requests plugins

The requests_pelican.PelicanAdapter object can be integrated with the standard requests.Session to simplify combining Pelican support with other plugins, for example:

from requests_pelican import PelicanAdapter
from igwn_auth_utils import Session
with Session() as sess:
    sess.mount("osdf://", PelicanAdapter("osdf"))
    resp = sess.get("osdf:///igwn/ligo/README", token_scope="read:/ligo")
    ...