def __call__(self, env, start_response):
# a lot of this is cribbed from listing_formats / swob.Request
if env['REQUEST_METHOD'] != 'GET':
# Nothing to translate
return self.app(env, start_response)
try:
v, a, c = split_path(
env.get('SCRIPT_NAME', '') + env['PATH_INFO'], 3, 3)
if not valid_api_version(v):
raise ValueError
except ValueError:
# not a container request; pass through
return self.app(env, start_response)
ctx = WSGIContext(self.app)
resp_iter = ctx._app_call(env)
content_type = content_length = cl_index = None
for index, (header, value) in enumerate(ctx._response_headers):
header = header.lower()
if header == 'content-type':
content_type = value.split(';', 1)[0].strip()
if content_length:
break
elif header == 'content-length':
cl_index = index
try:
content_length = int(value)
except ValueError:
pass # ignore -- we'll bail later
if content_type:
break
if content_type != 'application/json' or content_length is None:
start_response(ctx._response_status, ctx._response_headers,
ctx._response_exc_info)
return resp_iter
if content_length > MAX_CONTAINER_LISTING_CONTENT_LENGTH:
LOGGER.warn(
'The content length (%d) of the listing is too long (max=%d)',
content_length, MAX_CONTAINER_LISTING_CONTENT_LENGTH)
start_response(ctx._response_status, ctx._response_headers,
ctx._response_exc_info)
return resp_iter
# We've done our sanity checks, slurp the response into memory
with closing_if_possible(resp_iter):
body = b''.join(resp_iter)
try:
listing = json.loads(body)
for item in listing:
if 'subdir' in item:
continue
value, params = parse_header(item['hash'])
if 's3_etag' in params:
item['s3_etag'] = '"%s"' % params.pop('s3_etag')
item['hash'] = value + ''.join('; %s=%s' % kv
for kv in params.items())
except (TypeError, KeyError, ValueError):
# If anything goes wrong above, drop back to original response
start_response(ctx._response_status, ctx._response_headers,
ctx._response_exc_info)
return [body]
body = json.dumps(listing)
ctx._response_headers[cl_index] = (
ctx._response_headers[cl_index][0],
str(len(body)),
)
start_response(ctx._response_status, ctx._response_headers,
ctx._response_exc_info)
return [body]
