def describe(request):
"""Render a description of the whole MAAS API.
:param request: A "related" HTTP request. This is used to derive the URL
where the client expects to see the MAAS API.
:return: An `HttpResponse` containing a JSON description of the whole MAAS
API. Links to the API will use the same scheme and hostname that the
client used in `request`.
"""
description = describe_api()
# Add hash so that client can check if things are up to date.
description["hash"] = get_api_description_hash()
# Make all URIs absolute. Clients - and the command-line client in
# particular - expect that all handler URIs are absolute, not just paths.
# The handler URIs returned by describe_resource() are relative paths.
absolute = partial(build_absolute_uri, request)
for resource in description["resources"]:
for handler_type in "anon", "auth":
handler = resource[handler_type]
if handler is not None:
handler["uri"] = absolute(handler["path"])
# Return as a JSON document.
return HttpResponse(
json.dumps(description),
content_type="application/json")
def test_describe_api_returns_description_document(self):
is_list = IsInstance(list)
is_tuple = IsInstance(tuple)
is_text = MatchesAny(IsInstance((str, bytes)), Is(None))
is_bool = IsInstance(bool)
is_operation = MatchesAny(Is(None), is_text)
is_http_method = MatchesAny(
Equals("GET"), Equals("POST"), Equals("PUT"), Equals("DELETE")
)
is_action = MatchesDict(
{
"doc": is_text,
"method": is_http_method,
"name": is_text,
"op": is_operation,
"restful": is_bool,
}
)
is_handler = MatchesDict(
{
"actions": MatchesAll(is_list, AllMatch(is_action)),
"doc": is_text,
"name": is_text,
"params": is_tuple,
"path": is_text,
}
)
is_resource = MatchesDict(
{
"anon": MatchesAny(Is(None), is_handler),
"auth": MatchesAny(Is(None), is_handler),
"name": is_text,
}
)
is_resource_list = MatchesAll(is_list, AllMatch(is_resource))
is_legacy_handler_list = MatchesAll(is_list, AllMatch(is_handler))
self.assertThat(
describe_api(),
MatchesDict(
{
"doc": Equals("MAAS API"),
"resources": is_resource_list,
"handlers": is_legacy_handler_list,
}
),
)