X-Git-Url: https://projects.mako.cc/source/twitter-api-cdsw-solutions/blobdiff_plain/5f84907a072eb4dd4b58dce2634f24ede6181eb8..b5d973d7a0a14eca21b2981ffacf4fb9ea77ba41:/oauthlib/oauth2/rfc6749/utils.py

diff --git a/oauthlib/oauth2/rfc6749/utils.py b/oauthlib/oauth2/rfc6749/utils.py
new file mode 100644
index 0000000..6a8e24b
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+++ b/oauthlib/oauth2/rfc6749/utils.py
@@ -0,0 +1,96 @@
+# -*- coding: utf-8 -*-
+"""
+oauthlib.utils
+~~~~~~~~~~~~~~
+
+This module contains utility methods used by various parts of the OAuth 2 spec.
+"""
+from __future__ import absolute_import, unicode_literals
+
+import os
+import datetime
+try:
+    from urllib import quote
+except ImportError:
+    from urllib.parse import quote
+try:
+    from urlparse import urlparse
+except ImportError:
+    from urllib.parse import urlparse
+from oauthlib.common import unicode_type, urldecode
+
+
+def list_to_scope(scope):
+    """Convert a list of scopes to a space separated string."""
+    if isinstance(scope, unicode_type) or scope is None:
+        return scope
+    elif isinstance(scope, (tuple, list)):
+        return " ".join([unicode_type(s) for s in scope])
+    elif isinstance(scope, set):
+        return list_to_scope(list(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):
+        return [unicode_type(s) for s in scope]
+    if isinstance(scope, set):
+        scope_to_list(list(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, unicode_type):
+        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 unicode_type(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://')