def canonical_uri(self, http_request):
# S3 does **NOT** do path normalization that SigV4 typically does.
# Urlencode the path, **NOT** ``auth_path`` (because vhosting).
path = urlparse(http_request.path)
# Because some quoting may have already been applied, let's back it out.
unquoted = unquote(path.path)
# Requote, this time addressing all characters.
encoded = quote(unquoted)
return encoded
def mangle_path_and_params(self, req):
"""
Returns a copy of the request object with fixed ``auth_path/params``
attributes from the original.
"""
modified_req = copy.copy(req)
# Unlike the most other services, in S3, ``req.params`` isn't the only
# source of query string parameters.
# Because of the ``query_args``, we may already have a query string
# **ON** the ``path/auth_path``.
# Rip them apart, so the ``auth_path/params`` can be signed
# appropriately.
parsed_path = urlparse(modified_req.auth_path)
modified_req.auth_path = parsed_path.path
if modified_req.params is None:
modified_req.params = {}
else:
# To keep the original request object untouched. We must make
# a copy of the params dictionary. Because the copy of the
# original request directly refers to the params dictionary
# of the original request.
copy_params = req.params.copy()
modified_req.params = copy_params
raw_qs = parsed_path.query
existing_qs = parse_qs(
raw_qs,
keep_blank_values=True
)
# ``parse_qs`` will return lists. Don't do that unless there's a real,
# live list provided.
for key, value in existing_qs.items():
if isinstance(value, (list, tuple)):
if len(value) == 1:
existing_qs[key] = value[0]
modified_req.params.update(existing_qs)
return modified_req
