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"""
oauthlib.utils
~~~~~~~~~~~~~~
This module contains utility methods used by various parts of the OAuth 2 spec.
"""
import datetime
import os
from urllib.parse import quote, urlparse
from oauthlib.common import urldecode
def list_to_scope(scope):
"""Convert a list of scopes to a space separated string."""
if isinstance(scope, str) or scope is None:
return scope
elif isinstance(scope, (set, tuple, list)):
return " ".join([str(s) for s in scope])
else:
raise ValueError("Invalid scope (%s), must be string, tuple, set, or list." % scope)
def scope_to_list(scope):
"""Convert a space separated string to a list of scopes."""
if isinstance(scope, (tuple, list, set)):
return [str(s) for s in scope]
elif scope is None:
return None
else:
return scope.strip().split(" ")
def params_from_uri(uri):
params = dict(urldecode(urlparse(uri).query))
if 'scope' in params:
params['scope'] = scope_to_list(params['scope'])
return params
def host_from_uri(uri):
"""Extract hostname and port from URI.
Will use default port for HTTP and HTTPS if none is present in the URI.
"""
default_ports = {
'HTTP': '80',
'HTTPS': '443',
}
sch, netloc, path, par, query, fra = urlparse(uri)
if ':' in netloc:
netloc, port = netloc.split(':', 1)
else:
port = default_ports.get(sch.upper())
return netloc, port
def escape(u):
"""Escape a string in an OAuth-compatible fashion.
TODO: verify whether this can in fact be used for OAuth 2
"""
if not isinstance(u, str):
raise ValueError('Only unicode objects are escapable.')
return quote(u.encode('utf-8'), safe=b'~')
def generate_age(issue_time):
"""Generate a age parameter for MAC authentication draft 00."""
td = datetime.datetime.now() - issue_time
age = (td.microseconds + (td.seconds + td.days * 24 * 3600)
* 10 ** 6) / 10 ** 6
return str(age)
def is_secure_transport(uri):
"""Check if the uri is over ssl."""
if os.environ.get('OAUTHLIB_INSECURE_TRANSPORT'):
return True
return uri.lower().startswith('https://')
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