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Parser for WWW-Authenticate headers.

Project description

Parsing WWW-Authenticate headers is difficult. Let this tiny library do all the hard work for you.

What’s so difficult?

The header contains a set of comma-separated challenges, but the parameters for each challenge are also comma-separated. Some challenges in the wild don’t have parameters, which violates the spec. The Negotiate challenge eschews the required name-value pairs and has a single string as its parameter.

Some servers may offer more challenges than you were expecting, but you’d still like to notice the one you care about.

Usage

It’s really easy:

import www_authenticate

parsed = www_authenticate.parse(response.headers['WWW-Authenticate'])

if 'Basic' in parsed:
    realm = parsed['Basic']['realm']
if 'Negotiate' in parsed:
    challenge = parsed['Negotiate']

The returned object is a collections.OrderedDict with authentication scheme names as keys. The values are either dictionaries, a single string, or None if there are no parameters.

Installation

This package is in PyPI. Install with:

$ pip install www-authenticate

There are no external dependencies.

Project details


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