Add 'requests' library to third_party.

third_party/requests/structures.py

Index: third_party/requests/structures.py
diff --git a/third_party/requests/structures.py b/third_party/requests/structures.py
new file mode 100644
index 0000000000000000000000000000000000000000..8d02ea67b6d2debc8bb1b368166ccb773abde142
--- /dev/null
+++ b/third_party/requests/structures.py
@@ -0,0 +1,128 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.structures
+~~~~~~~~~~~~~~~~~~~
+
+Data structures that power Requests.
+
+"""
+
+import os
+import collections
+from itertools import islice
+
+
+class IteratorProxy(object):
+    """docstring for IteratorProxy"""
+    def __init__(self, i):
+        self.i = i
+        # self.i = chain.from_iterable(i)
+
+    def __iter__(self):
+        return self.i
+
+    def __len__(self):
+        if hasattr(self.i, '__len__'):
+            return len(self.i)
+        if hasattr(self.i, 'len'):
+            return self.i.len
+        if hasattr(self.i, 'fileno'):
+            return os.fstat(self.i.fileno()).st_size
+
+    def read(self, n):
+        return "".join(islice(self.i, None, n))
+
+
+class CaseInsensitiveDict(collections.MutableMapping):
+    """
+    A case-insensitive ``dict``-like object.
+
+    Implements all methods and operations of
+    ``collections.MutableMapping`` as well as dict's ``copy``. Also
+    provides ``lower_items``.
+
+    All keys are expected to be strings. The structure remembers the
+    case of the last key to be set, and ``iter(instance)``,
+    ``keys()``, ``items()``, ``iterkeys()``, and ``iteritems()``
+    will contain case-sensitive keys. However, querying and contains
+    testing is case insensitive:
+
+        cid = CaseInsensitiveDict()
+        cid['Accept'] = 'application/json'
+        cid['aCCEPT'] == 'application/json'  # True
+        list(cid) == ['Accept']  # True
+
+    For example, ``headers['content-encoding']`` will return the
+    value of a ``'Content-Encoding'`` response header, regardless
+    of how the header name was originally stored.
+
+    If the constructor, ``.update``, or equality comparison
+    operations are given keys that have equal ``.lower()``s, the
+    behavior is undefined.
+
+    """
+    def __init__(self, data=None, **kwargs):
+        self._store = dict()
+        if data is None:
+            data = {}
+        self.update(data, **kwargs)
+
+    def __setitem__(self, key, value):
+        # Use the lowercased key for lookups, but store the actual
+        # key alongside the value.
+        self._store[key.lower()] = (key, value)
+
+    def __getitem__(self, key):
+        return self._store[key.lower()][1]
+
+    def __delitem__(self, key):
+        del self._store[key.lower()]
+
+    def __iter__(self):
+        return (casedkey for casedkey, mappedvalue in self._store.values())
+
+    def __len__(self):
+        return len(self._store)
+
+    def lower_items(self):
+        """Like iteritems(), but with all lowercase keys."""
+        return (
+            (lowerkey, keyval[1])
+            for (lowerkey, keyval)
+            in self._store.items()
+        )
+
+    def __eq__(self, other):
+        if isinstance(other, collections.Mapping):
+            other = CaseInsensitiveDict(other)
+        else:
+            return NotImplemented
+        # Compare insensitively
+        return dict(self.lower_items()) == dict(other.lower_items())
+
+    # Copy is required
+    def copy(self):
+         return CaseInsensitiveDict(self._store.values())
+
+    def __repr__(self):
+        return '%s(%r)' % (self.__class__.__name__, dict(self.items()))
+
+
+class LookupDict(dict):
+    """Dictionary lookup object."""
+
+    def __init__(self, name=None):
+        self.name = name
+        super(LookupDict, self).__init__()
+
+    def __repr__(self):
+        return '<lookup \'%s\'>' % (self.name)
+
+    def __getitem__(self, key):
+        # We allow fall-through here, so values default to None
+
+        return self.__dict__.get(key, None)
+
+    def get(self, key, default=None):
+        return self.__dict__.get(key, default)