# Copyright (c) 2010-2012 OpenStack Foundation # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or # implied. # See the License for the specific language governing permissions and # limitations under the License. from six.moves.urllib.parse import unquote from swift.account.utils import account_listing_response from swift.common.middleware.acl import parse_acl, format_acl from swift.common.utils import public from swift.common.constraints import check_metadata from swift.common.http import HTTP_NOT_FOUND, HTTP_GONE from swift.proxy.controllers.base import Controller, clear_info_cache, \ set_info_cache from swift.common.middleware import listing_formats from swift.common.swob import HTTPBadRequest, HTTPMethodNotAllowed from swift.common.request_helpers import get_sys_meta_prefix class AccountController(Controller): """WSGI controller for account requests""" server_type = 'Account' def __init__(self, app, account_name, **kwargs): super(AccountController, self).__init__(app) self.account_name = unquote(account_name) if not self.app.allow_account_management: self.allowed_methods.remove('PUT') self.allowed_methods.remove('DELETE') def add_acls_from_sys_metadata(self, resp): if resp.environ['REQUEST_METHOD'] in ('HEAD', 'GET', 'PUT', 'POST'): prefix = get_sys_meta_prefix('account') + 'core-' name = 'access-control' (extname, intname) = ('x-account-' + name, prefix + name) acl_dict = parse_acl(version=2, data=resp.headers.pop(intname)) if acl_dict: # treat empty dict as empty header resp.headers[extname] = format_acl( version=2, acl_dict=acl_dict) def GETorHEAD(self, req): """Handler for HTTP GET/HEAD requests.""" length_limit = self.get_name_length_limit() if len(self.account_name) > length_limit: resp = HTTPBadRequest(request=req) resp.body = b'Account name length of %d longer than %d' % \ (len(self.account_name), length_limit) # Don't cache this. We know the account doesn't exist because # the name is bad; we don't need to cache that because it's # really cheap to recompute. return resp partition = self.app.account_ring.get_part(self.account_name) concurrency = self.app.account_ring.replica_count \ if self.app.get_policy_options(None).concurrent_gets else 1 node_iter = self.app.iter_nodes(self.app.account_ring, partition, self.logger, req) params = req.params params['format'] = 'json' req.params = params resp = self.GETorHEAD_base( req, 'Account', node_iter, partition, req.swift_entity_path.rstrip('/'), concurrency) if resp.status_int == HTTP_NOT_FOUND: if resp.headers.get('X-Account-Status', '').lower() == 'deleted': resp.status = HTTP_GONE elif self.app.account_autocreate: # This is kind of a lie; we pretend like the account is # there, but it's not. We'll create it as soon as something # tries to write to it, but we don't need databases on disk # to tell us that nothing's there. # # We set a header so that certain consumers can tell it's a # fake listing. The important one is the PUT of a container # to an autocreate account; the proxy checks to see if the # account exists before actually performing the PUT and # creates the account if necessary. If we feed it a perfect # lie, it'll just try to create the container without # creating the account, and that'll fail. resp = account_listing_response( self.account_name, req, listing_formats.get_listing_content_type(req)) resp.headers['X-Backend-Fake-Account-Listing'] = 'yes' # Cache this. We just made a request to a storage node and got # up-to-date information for the account. resp.headers['X-Backend-Recheck-Account-Existence'] = str( self.app.recheck_account_existence) set_info_cache(self.app, req.environ, self.account_name, None, resp) if req.environ.get('swift_owner'): self.add_acls_from_sys_metadata(resp) else: for header in self.app.swift_owner_headers: resp.headers.pop(header, None) return resp @public def PUT(self, req): """HTTP PUT request handler.""" if not self.app.allow_account_management: return HTTPMethodNotAllowed( request=req, headers={'Allow': ', '.join(self.allowed_methods)}) error_response = check_metadata(req, 'account') if error_response: return error_response length_limit = self.get_name_length_limit() if len(self.account_name) > length_limit: resp = HTTPBadRequest(request=req) resp.body = b'Account name length of %d longer than %d' % \ (len(self.account_name), length_limit) return resp account_partition, accounts = \ self.app.account_ring.get_nodes(self.account_name) headers = self.generate_request_headers(req, transfer=True) clear_info_cache(self.app, req.environ, self.account_name) resp = self.make_requests( req, self.app.account_ring, account_partition, 'PUT', req.swift_entity_path, [headers] * len(accounts)) self.add_acls_from_sys_metadata(resp) return resp @public def POST(self, req): """HTTP POST request handler.""" length_limit = self.get_name_length_limit() if len(self.account_name) > length_limit: resp = HTTPBadRequest(request=req) resp.body = b'Account name length of %d longer than %d' % \ (len(self.account_name), length_limit) return resp error_response = check_metadata(req, 'account') if error_response: return error_response account_partition, accounts = \ self.app.account_ring.get_nodes(self.account_name) headers = self.generate_request_headers(req, transfer=True) clear_info_cache(self.app, req.environ, self.account_name) resp = self.make_requests( req, self.app.account_ring, account_partition, 'POST', req.swift_entity_path, [headers] * len(accounts)) if resp.status_int == HTTP_NOT_FOUND and self.app.account_autocreate: self.autocreate_account(req, self.account_name) resp = self.make_requests( req, self.app.account_ring, account_partition, 'POST', req.swift_entity_path, [headers] * len(accounts)) self.add_acls_from_sys_metadata(resp) return resp @public def DELETE(self, req): """HTTP DELETE request handler.""" # Extra safety in case someone typos a query string for an # account-level DELETE request that was really meant to be caught by # some middleware. if req.query_string: return HTTPBadRequest(request=req) if not self.app.allow_account_management: return HTTPMethodNotAllowed( request=req, headers={'Allow': ', '.join(self.allowed_methods)}) account_partition, accounts = \ self.app.account_ring.get_nodes(self.account_name) headers = self.generate_request_headers(req) clear_info_cache(self.app, req.environ, self.account_name) resp = self.make_requests( req, self.app.account_ring, account_partition, 'DELETE', req.swift_entity_path, [headers] * len(accounts)) return resp