def OPTIONS(self, req):
"""
Base handler for OPTIONS requests
:param req: swob.Request object
:returns: swob.Response object
"""
# Prepare the default response
headers = {'Allow': ', '.join(self.allowed_methods)}
resp = Response(status=200, request=req, headers=headers)
# If this isn't a CORS pre-flight request then return now
req_origin_value = req.headers.get('Origin', None)
if not req_origin_value:
return resp
# This is a CORS preflight request so check it's allowed
try:
container_info = \
self.container_info(self.account_name, self.container_name)
except AttributeError:
# This should only happen for requests to the Account. A future
# change could allow CORS requests to the Account level as well.
return resp
cors = container_info.get('cors', {})
# If the CORS origin isn't allowed return a 401
if not self.is_origin_allowed(cors, req_origin_value) or (
req.headers.get('Access-Control-Request-Method') not in
self.allowed_methods):
resp.status = HTTP_UNAUTHORIZED
return resp
# Always allow the x-auth-token header. This ensures
# clients can always make a request to the resource.
allow_headers = set()
if cors.get('allow_headers'):
allow_headers.update(
[a.strip()
for a in cors['allow_headers'].split(' ')
if a.strip()])
allow_headers.add('x-auth-token')
# Populate the response with the CORS preflight headers
headers['access-control-allow-origin'] = req_origin_value
if cors.get('max_age') is not None:
headers['access-control-max-age'] = cors.get('max_age')
headers['access-control-allow-methods'] = \
', '.join(self.allowed_methods)
headers['access-control-allow-headers'] = ', '.join(allow_headers)
resp.headers = headers
return resp
def GETorHEAD_base(self, req, server_type, partition, nodes, path,
attempts):
"""
Base handler for HTTP GET or HEAD requests.
:param req: swob.Request object
:param server_type: server type
:param partition: partition
:param nodes: nodes
:param path: path for the request
:param attempts: number of attempts to try
:returns: swob.Response object
"""
statuses = []
reasons = []
bodies = []
sources = []
newest = config_true_value(req.headers.get('x-newest', 'f'))
nodes = iter(nodes)
while len(statuses) < attempts:
try:
node = nodes.next()
except StopIteration:
break
if self.error_limited(node):
continue
start_node_timing = time.time()
try:
with ConnectionTimeout(self.app.conn_timeout):
headers = dict(req.headers)
headers['Connection'] = 'close'
conn = http_connect(
node['ip'], node['port'], node['device'], partition,
req.method, path, headers=headers,
query_string=req.query_string)
self.app.set_node_timing(node, time.time() - start_node_timing)
with Timeout(self.app.node_timeout):
possible_source = conn.getresponse()
# See NOTE: gate_conn at top of file about this.
possible_source.gate_conn = conn
except (Exception, Timeout):
self.exception_occurred(
node, server_type, _('Trying to %(method)s %(path)s') %
{'method': req.method, 'path': req.path})
continue
if self.is_good_source(possible_source):
# 404 if we know we don't have a synced copy
if not float(possible_source.getheader('X-PUT-Timestamp', 1)):
statuses.append(HTTP_NOT_FOUND)
reasons.append('')
bodies.append('')
self.close_gate_conn(possible_source)
else:
statuses.append(possible_source.status)
reasons.append(possible_source.reason)
bodies.append('')
sources.append(possible_source)
if not newest: # one good source is enough
break
else:
statuses.append(possible_source.status)
reasons.append(possible_source.reason)
bodies.append(possible_source.read())
if possible_source.status == HTTP_INSUFFICIENT_STORAGE:
self.error_limit(node)
elif is_server_error(possible_source.status):
self.error_occurred(node, _('ERROR %(status)d %(body)s '
'From %(type)s Server') %
{'status': possible_source.status,
'body': bodies[-1][:1024],
'type': server_type})
if sources:
sources.sort(key=source_key)
source = sources.pop()
for src in sources:
self.close_gate_conn(src)
res = Response(request=req, conditional_response=True)
if req.method == 'GET' and \
source.status in (HTTP_OK, HTTP_PARTIAL_CONTENT):
res.app_iter = self._make_app_iter(node, source)
# See NOTE: gate_conn at top of file about this.
res.gate_conn = source.gate_conn
res.status = source.status
update_headers(res, source.getheaders())
if not res.environ:
res.environ = {}
res.environ['gate_x_timestamp'] = \
source.getheader('x-timestamp')
res.accept_ranges = 'bytes'
res.content_length = source.getheader('Content-Length')
if source.getheader('Content-Type'):
res.charset = None
res.content_type = source.getheader('Content-Type')
return res
return self.best_response(req, statuses, reasons, bodies,
'%s %s' % (server_type, req.method))
