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"""
oauthlib.utils
~~~~~~~~~~~~~~
This module contains utility methods used by various parts of the OAuth 2 spec.
"""
import urllib
import urlparse
def scope_to_string(scope):
"""Convert a list of scopes to a space separated string."""
if isinstance(scope, unicode) or scope is None:
return scope
elif isinstance(scope, list):
return " ".join(scope)
else:
raise ValueError("Invalid scope, must be string or list.")
def scope_to_list(scope):
"""Convert a space separated string to a list of scopes."""
if isinstance(scope, list) or scope is None:
return scope
else:
return scope.split(" ")
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 = {
u'HTTP': u'80',
u'HTTPS': u'443',
}
sch, netloc, path, par, query, fra = urlparse.urlparse(uri)
if u':' in netloc:
netloc, port = netloc.split(u':', 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, unicode):
raise ValueError('Only unicode objects are escapable.')
return urllib.quote(u.encode('utf-8'), safe='~')
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