732 lines
23 KiB
Python
732 lines
23 KiB
Python
# Copyright (c) 2010-2011 OpenStack, LLC.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import hashlib
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import httplib
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import os
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import random
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import socket
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import StringIO
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import time
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import urllib
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import simplejson as json
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from xml.dom import minidom
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class AuthenticationFailed(Exception):
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pass
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class RequestError(Exception):
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pass
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class ResponseError(Exception):
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def __init__(self, response):
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self.status = response.status
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self.reason = response.reason
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Exception.__init__(self)
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def __str__(self):
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return '%d: %s' % (self.status, self.reason)
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def __repr__(self):
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return '%d: %s' % (self.status, self.reason)
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def listing_empty(method):
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for i in xrange(0, 6):
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if len(method()) == 0:
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return True
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time.sleep(2**i)
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return False
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def listing_items(method):
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marker = None
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once = True
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items = []
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while once or items:
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for i in items:
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yield i
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if once or marker:
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if marker:
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items = method(parms={'marker':marker})
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else:
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items = method()
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if len(items) == 10000:
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marker = items[-1]
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else:
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marker = None
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once = False
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else:
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items = []
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class Connection(object):
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def __init__(self, config):
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self.auth_host = config['auth_host']
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self.auth_port = int(config['auth_port'])
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self.auth_ssl = config['auth_ssl'] in ('on', 'true', 'yes', '1')
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self.account = config['account']
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self.username = config['username']
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self.password = config['password']
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self.storage_host = None
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self.storage_port = None
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self.conn_class = None
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def get_account(self):
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return Account(self, self.account)
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def authenticate(self, clone_conn=None):
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if clone_conn:
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self.conn_class = clone_conn.conn_class
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self.storage_host = clone_conn.storage_host
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self.storage_url = clone_conn.storage_url
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self.storage_port = clone_conn.storage_port
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self.storage_token = clone_conn.storage_token
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return
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headers = {
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'x-storage-user': self.username,
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'x-storage-pass': self.password,
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}
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path = '/v1/%s/auth' % (self.account)
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if self.auth_ssl:
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connection = httplib.HTTPSConnection(self.auth_host,
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port=self.auth_port)
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else:
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connection = httplib.HTTPConnection(self.auth_host,
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port=self.auth_port)
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#connection.set_debuglevel(3)
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connection.request('GET', path, '', headers)
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response = connection.getresponse()
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connection.close()
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if response.status == 401:
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raise AuthenticationFailed()
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if response.status not in (200, 204):
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raise ResponseError(response)
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for hdr in response.getheaders():
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if hdr[0].lower() == "x-storage-url":
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storage_url = hdr[1]
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elif hdr[0].lower() == "x-storage-token":
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storage_token = hdr[1]
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if not (storage_url and storage_token):
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raise AuthenticationFailed()
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x = storage_url.split('/')
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if x[0] == 'http:':
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self.conn_class = httplib.HTTPConnection
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self.storage_port = 80
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elif x[0] == 'https:':
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self.conn_class = httplib.HTTPSConnection
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self.storage_port = 443
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else:
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raise ValueError, 'unexpected protocol %s' % (x[0])
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self.storage_host = x[2].split(':')[0]
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if ':' in x[2]:
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self.storage_port = int(x[2].split(':')[1])
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self.storage_url = '/%s/%s' % (x[3], x[4])
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self.storage_token = storage_token
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self.http_connect()
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return self.storage_url, self.storage_token
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def http_connect(self):
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self.connection = self.conn_class(self.storage_host,
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port=self.storage_port)
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#self.connection.set_debuglevel(3)
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def make_path(self, path=[], cfg={}):
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if cfg.get('version_only_path'):
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return '/' + self.storage_url.split('/')[1]
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if path:
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quote = urllib.quote
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if cfg.get('no_quote') or cfg.get('no_path_quote'):
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quote = lambda x: x
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return '%s/%s' % (self.storage_url, '/'.join([quote(i) for i
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in path]))
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else:
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return self.storage_url
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def make_headers(self, hdrs, cfg={}):
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headers = {}
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if not cfg.get('no_auth_token'):
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headers['X-Auth-Token'] = self.storage_token
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if isinstance(hdrs, dict):
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headers.update(hdrs)
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return headers
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def make_request(self, method, path=[], data='', hdrs={}, parms={},
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cfg={}):
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path = self.make_path(path, cfg=cfg)
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headers = self.make_headers(hdrs, cfg=cfg)
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if isinstance(parms, dict) and parms:
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quote = urllib.quote
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if cfg.get('no_quote') or cfg.get('no_parms_quote'):
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quote = lambda x: x
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query_args = ['%s=%s' % (quote(x), quote(str(y))) for (x,y) in
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parms.items()]
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path = '%s?%s' % (path, '&'.join(query_args))
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if not cfg.get('no_content_length'):
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if cfg.get('set_content_length'):
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headers['Content-Length'] = cfg.get('set_content_length')
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else:
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headers['Content-Length'] = len(data)
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def try_request():
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self.http_connect()
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self.connection.request(method, path, data, headers)
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return self.connection.getresponse()
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self.response = None
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try_count = 0
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while try_count < 5:
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try_count += 1
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try:
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self.response = try_request()
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except httplib.HTTPException:
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continue
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if self.response.status == 401:
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self.authenticate()
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continue
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elif self.response.status == 503:
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if try_count != 5:
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time.sleep(5)
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continue
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break
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if self.response:
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return self.response.status
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raise RequestError('Unable to compelte http request')
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def put_start(self, path, hdrs={}, parms={}, cfg={}, chunked=False):
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self.http_connect()
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path = self.make_path(path, cfg)
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headers = self.make_headers(hdrs, cfg=cfg)
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if chunked:
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headers['Transfer-Encoding'] = 'chunked'
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headers.pop('Content-Length', None)
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if isinstance(parms, dict) and parms:
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quote = urllib.quote
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if cfg.get('no_quote') or cfg.get('no_parms_quote'):
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quote = lambda x: x
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query_args = ['%s=%s' % (quote(x), quote(str(y))) for (x,y) in
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parms.items()]
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path = '%s?%s' % (path, '&'.join(query_args))
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query_args = ['%s=%s' % (urllib.quote(x),
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urllib.quote(str(y))) for (x,y) in parms.items()]
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path = '%s?%s' % (path, '&'.join(query_args))
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self.connection = self.conn_class(self.storage_host,
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port=self.storage_port)
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#self.connection.set_debuglevel(3)
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self.connection.putrequest('PUT', path)
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for key, value in headers.iteritems():
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self.connection.putheader(key, value)
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self.connection.endheaders()
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def put_data(self, data, chunked=False):
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if chunked:
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self.connection.send('%s\r\n%s\r\n' % (hex(len(data)), data))
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else:
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self.connection.send(data)
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def put_end(self, chunked=False):
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if chunked:
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self.connection.send('0\r\n\r\n')
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self.response = self.connection.getresponse()
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self.connection.close()
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return self.response.status
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class Base:
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def __str__(self):
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return self.name
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def header_fields(self, fields):
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headers = dict(self.conn.response.getheaders())
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ret = {}
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for field in fields:
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if not headers.has_key(field[1]):
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raise ValueError("%s was not found in response header" %
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(field[1]))
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try:
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ret[field[0]] = int(headers[field[1]])
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except ValueError:
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ret[field[0]] = headers[field[1]]
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return ret
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class Account(Base):
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def __init__(self, conn, name):
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self.conn = conn
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self.name = str(name)
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def container(self, container_name):
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return Container(self.conn, self.name, container_name)
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def containers(self, hdrs={}, parms={}, cfg={}):
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format = parms.get('format', None)
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if format not in [None, 'json', 'xml']:
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raise RequestError('Invalid format: %s' % format)
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if format == None and parms.has_key('format'):
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del parms['format']
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status = self.conn.make_request('GET', self.path, hdrs=hdrs,
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parms=parms, cfg=cfg)
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if status == 200:
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if format == 'json':
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conts = json.loads(self.conn.response.read())
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for cont in conts:
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cont['name'] = cont['name'].encode('utf-8')
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return conts
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elif format == 'xml':
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conts = []
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tree = minidom.parseString(self.conn.response.read())
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for x in tree.getElementsByTagName('container'):
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cont = {}
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for key in ['name', 'count', 'bytes']:
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cont[key] = x.getElementsByTagName(key)[0].\
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childNodes[0].nodeValue
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conts.append(cont)
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for cont in conts:
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cont['name'] = cont['name'].encode('utf-8')
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return conts
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else:
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lines = self.conn.response.read().split('\n')
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if lines and not lines[-1]:
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lines = lines[:-1]
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return lines
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elif status == 204:
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return []
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raise ResponseError(self.conn.response)
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def delete_containers(self):
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for c in listing_items(self.containers):
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cont = self.container(c)
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if not cont.delete_recursive():
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return False
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return listing_empty(self.containers)
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def info(self, hdrs={}, parms={}, cfg={}):
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if self.conn.make_request('HEAD', self.path, hdrs=hdrs,
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parms=parms, cfg=cfg) != 204:
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raise ResponseError(self.conn.response)
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fields = [['object_count', 'x-account-object-count'],
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['container_count', 'x-account-container-count'],
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['bytes_used', 'x-account-bytes-used']]
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return self.header_fields(fields)
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@property
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def path(self):
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return []
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class Container(Base):
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def __init__(self, conn, account, name):
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self.conn = conn
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self.account = str(account)
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self.name = str(name)
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def create(self, hdrs={}, parms={}, cfg={}):
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return self.conn.make_request('PUT', self.path, hdrs=hdrs,
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parms=parms, cfg=cfg) in (201, 202)
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def delete(self, hdrs={}, parms={}):
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return self.conn.make_request('DELETE', self.path, hdrs=hdrs,
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parms=parms) == 204
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def delete_files(self):
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for f in listing_items(self.files):
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file = self.file(f)
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if not file.delete():
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return False
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return listing_empty(self.files)
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def delete_recursive(self):
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return self.delete_files() and self.delete()
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def file(self, file_name):
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return File(self.conn, self.account, self.name, file_name)
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def files(self, hdrs={}, parms={}, cfg={}):
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format = parms.get('format', None)
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if format not in [None, 'json', 'xml']:
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raise RequestError('Invalid format: %s' % format)
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if format == None and parms.has_key('format'):
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del parms['format']
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status = self.conn.make_request('GET', self.path, hdrs=hdrs,
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parms=parms, cfg=cfg)
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if status == 200:
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if format == 'json':
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files = json.loads(self.conn.response.read())
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for file in files:
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file['name'] = file['name'].encode('utf-8')
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file['content_type'] = file['content_type'].encode('utf-8')
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return files
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elif format == 'xml':
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files = []
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tree = minidom.parseString(self.conn.response.read())
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for x in tree.getElementsByTagName('object'):
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file = {}
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for key in ['name', 'hash', 'bytes', 'content_type',
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'last_modified']:
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file[key] = x.getElementsByTagName(key)[0].\
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childNodes[0].nodeValue
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files.append(file)
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for file in files:
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file['name'] = file['name'].encode('utf-8')
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file['content_type'] = file['content_type'].encode('utf-8')
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return files
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else:
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content = self.conn.response.read()
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if content:
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lines = content.split('\n')
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if lines and not lines[-1]:
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lines = lines[:-1]
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return lines
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else:
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return []
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elif status == 204:
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return []
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raise ResponseError(self.conn.response)
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def info(self, hdrs={}, parms={}, cfg={}):
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status = self.conn.make_request('HEAD', self.path, hdrs=hdrs,
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parms=parms, cfg=cfg)
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if self.conn.response.status == 204:
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fields = [['bytes_used', 'x-container-bytes-used'],
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['object_count', 'x-container-object-count']]
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return self.header_fields(fields)
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raise ResponseError(self.conn.response)
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@property
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def path(self):
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return [self.name]
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class File(Base):
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def __init__(self, conn, account, container, name):
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self.conn = conn
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self.account = str(account)
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self.container = str(container)
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self.name = str(name)
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self.chunked_write_in_progress = False
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self.content_type = None
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self.size = None
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self.metadata = {}
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def make_headers(self, cfg={}):
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headers = {}
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if not cfg.get('no_content_length'):
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if cfg.get('set_content_length'):
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headers['Content-Length'] = cfg.get('set_content_length')
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elif self.size:
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headers['Content-Length'] = self.size
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else:
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headers['Content-Length'] = 0
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if cfg.get('no_content_type'):
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pass
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elif self.content_type:
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headers['Content-Type'] = self.content_type
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else:
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headers['Content-Type'] = 'application/octet-stream'
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for key in self.metadata:
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headers['X-Object-Meta-'+key] = self.metadata[key]
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return headers
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@classmethod
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def compute_md5sum(cls, data):
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block_size = 4096
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if isinstance(data, str):
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data = StringIO.StringIO(data)
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checksum = hashlib.md5()
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buff = data.read(block_size)
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while buff:
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checksum.update(buff)
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buff = data.read(block_size)
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data.seek(0)
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return checksum.hexdigest()
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def copy(self, dest_cont, dest_file, hdrs={}, parms={}, cfg={}):
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if cfg.has_key('destination'):
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headers = {'Destination': cfg['destination']}
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elif cfg.get('no_destination'):
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headers = {}
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else:
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headers = {'Destination': '%s/%s' % (dest_cont, dest_file)}
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headers.update(hdrs)
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if headers.has_key('Destination'):
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headers['Destination'] = urllib.quote(headers['Destination'])
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return self.conn.make_request('COPY', self.path, hdrs=headers,
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parms=parms) == 201
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def delete(self, hdrs={}, parms={}):
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if self.conn.make_request('DELETE', self.path, hdrs=hdrs,
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parms=parms) != 204:
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raise ResponseError(self.conn.response)
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return True
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def info(self, hdrs={}, parms={}, cfg={}):
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if self.conn.make_request('HEAD', self.path, hdrs=hdrs,
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parms=parms, cfg=cfg) != 200:
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raise ResponseError(self.conn.response)
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fields = [['content_length', 'content-length'], ['content_type',
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'content-type'], ['last_modified', 'last-modified'], ['etag',
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'etag']]
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header_fields = self.header_fields(fields)
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header_fields['etag'] = header_fields['etag'].strip('"')
|
|
return header_fields
|
|
|
|
def initialize(self, hdrs={}, parms={}):
|
|
if not self.name:
|
|
return False
|
|
|
|
status = self.conn.make_request('HEAD', self.path, hdrs=hdrs,
|
|
parms=parms)
|
|
if status == 404:
|
|
return False
|
|
elif (status < 200) or (status > 299):
|
|
raise ResponseError(self.conn.response)
|
|
|
|
for hdr in self.conn.response.getheaders():
|
|
if hdr[0].lower() == 'content-type':
|
|
self.content_type = hdr[1]
|
|
if hdr[0].lower().startswith('x-object-meta-'):
|
|
self.metadata[hdr[0][14:]] = hdr[1]
|
|
if hdr[0].lower() == 'etag':
|
|
self.etag = hdr[1].strip('"')
|
|
if hdr[0].lower() == 'content-length':
|
|
self.size = int(hdr[1])
|
|
if hdr[0].lower() == 'last-modified':
|
|
self.last_modified = hdr[1]
|
|
|
|
return True
|
|
|
|
def load_from_filename(self, filename, callback=None):
|
|
fobj = open(filename, 'rb')
|
|
self.write(fobj, callback=callback)
|
|
fobj.close()
|
|
|
|
@property
|
|
def path(self):
|
|
return [self.container, self.name]
|
|
|
|
@classmethod
|
|
def random_data(cls, size=None):
|
|
if size == None:
|
|
size = random.randint(1, 32768)
|
|
fd = open('/dev/urandom', 'r')
|
|
data = fd.read(size)
|
|
fd.close()
|
|
return data
|
|
|
|
def read(self, size=-1, offset=0, hdrs=None, buffer=None,
|
|
callback=None, cfg={}):
|
|
|
|
if size > 0:
|
|
range = 'bytes=%d-%d' % (offset, (offset + size) - 1)
|
|
if hdrs:
|
|
hdrs['Range'] = range
|
|
else:
|
|
hdrs = {'Range': range}
|
|
|
|
status = self.conn.make_request('GET', self.path, hdrs=hdrs,
|
|
cfg=cfg)
|
|
|
|
if(status < 200) or (status > 299):
|
|
raise ResponseError(self.conn.response)
|
|
|
|
for hdr in self.conn.response.getheaders():
|
|
if hdr[0].lower() == 'content-type':
|
|
self.content_type = hdr[1]
|
|
|
|
if hasattr(buffer, 'write'):
|
|
scratch = self.conn.response.read(8192)
|
|
transferred = 0
|
|
|
|
while len(scratch) > 0:
|
|
buffer.write(scratch)
|
|
transferred += len(scratch)
|
|
if callable(callback):
|
|
callback(transferred, self.size)
|
|
scratch = self.conn.response.read(8192)
|
|
return None
|
|
else:
|
|
return self.conn.response.read()
|
|
|
|
def read_md5(self):
|
|
status = self.conn.make_request('GET', self.path)
|
|
|
|
if(status < 200) or (status > 299):
|
|
raise ResponseError(self.conn.response)
|
|
|
|
checksum = hashlib.md5()
|
|
|
|
scratch = self.conn.response.read(8192)
|
|
while len(scratch) > 0:
|
|
checksum.update(scratch)
|
|
scratch = self.conn.response.read(8192)
|
|
|
|
return checksum.hexdigest()
|
|
|
|
def save_to_filename(self, filename, callback=None):
|
|
try:
|
|
fobj = open(filename, 'wb')
|
|
self.read(buffer=fobj, callback=callback)
|
|
finally:
|
|
fobj.close()
|
|
|
|
def sync_metadata(self, metadata={}, cfg={}):
|
|
self.metadata.update(metadata)
|
|
|
|
if self.metadata:
|
|
headers = self.make_headers(cfg=cfg)
|
|
if not cfg.get('no_content_length'):
|
|
if cfg.get('set_content_length'):
|
|
headers['Content-Length'] = \
|
|
cfg.get('set_content_length')
|
|
else:
|
|
headers['Content-Length'] = 0
|
|
|
|
self.conn.make_request('POST', self.path, hdrs=headers, cfg=cfg)
|
|
|
|
if self.conn.response.status != 202:
|
|
raise ResponseError(self.conn.response)
|
|
|
|
return True
|
|
|
|
def chunked_write(self, data=None, hdrs={}, parms={}, cfg={}):
|
|
if data != None and self.chunked_write_in_progress:
|
|
self.conn.put_data(data, True)
|
|
elif data != None:
|
|
self.chunked_write_in_progress = True
|
|
|
|
headers = self.make_headers(cfg=cfg)
|
|
headers.update(hdrs)
|
|
|
|
self.conn.put_start(self.path, hdrs=headers, parms=parms,
|
|
cfg=cfg, chunked=True)
|
|
|
|
self.conn.put_data(data, True)
|
|
elif self.chunked_write_in_progress:
|
|
self.chunked_write_in_progress = False
|
|
return self.conn.put_end(True) == 201
|
|
else:
|
|
raise RuntimeError
|
|
|
|
def write(self, data='', hdrs={}, parms={}, callback=None, cfg={}):
|
|
block_size = 2**20
|
|
|
|
if isinstance(data, file):
|
|
try:
|
|
data.flush()
|
|
data.seek(0)
|
|
except IOError:
|
|
pass
|
|
self.size = int(os.fstat(data.fileno())[6])
|
|
else:
|
|
data = StringIO.StringIO(data)
|
|
self.size = data.len
|
|
|
|
headers = self.make_headers(cfg=cfg)
|
|
headers.update(hdrs)
|
|
|
|
self.conn.put_start(self.path, hdrs=headers, parms=parms, cfg=cfg)
|
|
|
|
transfered = 0
|
|
buff = data.read(block_size)
|
|
try:
|
|
while len(buff) > 0:
|
|
self.conn.put_data(buff)
|
|
buff = data.read(block_size)
|
|
transfered += len(buff)
|
|
if callable(callback):
|
|
callback(transfered, self.size)
|
|
|
|
self.conn.put_end()
|
|
except socket.timeout, err:
|
|
raise err
|
|
|
|
if (self.conn.response.status < 200) or \
|
|
(self.conn.response.status > 299):
|
|
|
|
raise ResponseError(self.conn.response)
|
|
|
|
self.md5 = self.compute_md5sum(data)
|
|
|
|
return True
|
|
|
|
def write_random(self, size=None, hdrs={}, parms={}, cfg={}):
|
|
data = self.random_data(size)
|
|
if not self.write(data, hdrs=hdrs, parms=parms, cfg=cfg):
|
|
raise ResponseError(self.conn.response)
|
|
self.md5 = self.compute_md5sum(StringIO.StringIO(data))
|
|
return data
|