X-Git-Url: https://projects.mako.cc/source/twitter-api-cdsw-solutions/blobdiff_plain/935dc47766b0e4ee54b4dcfbddf4ac549280574e..043b63c67557591f1e85b53d17fc8a1a797f48ca:/oauthlib/oauth1/rfc5849/utils.py

diff --git a/oauthlib/oauth1/rfc5849/utils.py b/oauthlib/oauth1/rfc5849/utils.py
new file mode 100644
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+++ b/oauthlib/oauth1/rfc5849/utils.py
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+# -*- coding: utf-8 -*-
+"""
+oauthlib.utils
+~~~~~~~~~~~~~~
+
+This module contains utility methods used by various parts of the OAuth
+spec.
+"""
+from __future__ import absolute_import, unicode_literals
+
+try:
+    import urllib2
+except ImportError:
+    import urllib.request as urllib2
+
+from oauthlib.common import quote, unquote, bytes_type, unicode_type
+
+UNICODE_ASCII_CHARACTER_SET = ('abcdefghijklmnopqrstuvwxyz'
+                               'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+                               '0123456789')
+
+
+def filter_params(target):
+    """Decorator which filters params to remove non-oauth_* parameters
+
+    Assumes the decorated method takes a params dict or list of tuples as its
+    first argument.
+    """
+    def wrapper(params, *args, **kwargs):
+        params = filter_oauth_params(params)
+        return target(params, *args, **kwargs)
+
+    wrapper.__doc__ = target.__doc__
+    return wrapper
+
+
+def filter_oauth_params(params):
+    """Removes all non oauth parameters from a dict or a list of params."""
+    is_oauth = lambda kv: kv[0].startswith("oauth_")
+    if isinstance(params, dict):
+        return list(filter(is_oauth, list(params.items())))
+    else:
+        return list(filter(is_oauth, params))
+
+
+def escape(u):
+    """Escape a unicode string in an OAuth-compatible fashion.
+
+    Per `section 3.6`_ of the spec.
+
+    .. _`section 3.6`: http://tools.ietf.org/html/rfc5849#section-3.6
+
+    """
+    if not isinstance(u, unicode_type):
+        raise ValueError('Only unicode objects are escapable. ' +
+                         'Got %s of type %s.' % (u, type(u)))
+    # Letters, digits, and the characters '_.-' are already treated as safe
+    # by urllib.quote(). We need to add '~' to fully support rfc5849.
+    return quote(u, safe=b'~')
+
+
+def unescape(u):
+    if not isinstance(u, unicode_type):
+        raise ValueError('Only unicode objects are unescapable.')
+    return unquote(u)
+
+
+def parse_keqv_list(l):
+    """A unicode-safe version of urllib2.parse_keqv_list"""
+    # With Python 2.6, parse_http_list handles unicode fine
+    return urllib2.parse_keqv_list(l)
+
+
+def parse_http_list(u):
+    """A unicode-safe version of urllib2.parse_http_list"""
+    # With Python 2.6, parse_http_list handles unicode fine
+    return urllib2.parse_http_list(u)
+
+
+def parse_authorization_header(authorization_header):
+    """Parse an OAuth authorization header into a list of 2-tuples"""
+    auth_scheme = 'OAuth '.lower()
+    if authorization_header[:len(auth_scheme)].lower().startswith(auth_scheme):
+        items = parse_http_list(authorization_header[len(auth_scheme):])
+        try:
+            return list(parse_keqv_list(items).items())
+        except (IndexError, ValueError):
+            pass
+    raise ValueError('Malformed authorization header')