text: # Copyright (c) 2010-2011 OpenStack, LLC.
  #
  # 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.
  
  """
  Cloud Files client library used internally
  """
  import socket
  from urllib import quote as _quote
  from urlparse import urlparse, urlunparse
  
  try:
      from eventlet.green.httplib import HTTPException, HTTPSConnection
  except ImportError:
      from httplib import HTTPException, HTTPSConnection
  
  try:
      from eventlet import sleep
  except ImportError:
      from time import sleep
  
  try:
      from swift.common.bufferedhttp \
          import BufferedHTTPConnection as HTTPConnection
  except ImportError:
      try:
          from eventlet.green.httplib import HTTPConnection
      except ImportError:
          from httplib import HTTPConnection
  
  
  def quote(value, safe='/'):
      """
      Patched version of urllib.quote that encodes utf8 strings before quoting
      """
      if isinstance(value, unicode):
          value = value.encode('utf8')
      return _quote(value, safe)
  
  
  # look for a real json parser first
  try:
      # simplejson is popular and pretty good
      from simplejson import loads as json_loads
  except ImportError:
      # 2.6 will have a json module in the stdlib
      from json import loads as json_loads
  
  
  class ClientException(Exception):
  
      def __init__(self, msg, http_scheme='', http_host='', http_port='',
                   http_path='', http_query='', http_status=0, http_reason='',
                   http_device=''):
          Exception.__init__(self, msg)
          self.msg = msg
          self.http_scheme = http_scheme
          self.http_host = http_host
          self.http_port = http_port
          self.http_path = http_path
          self.http_query = http_query
          self.http_status = http_status
          self.http_reason = http_reason
          self.http_device = http_device
  
      def __str__(self):
          a = self.msg
          b = ''
          if self.http_scheme:
              b += '%s://' % self.http_scheme
          if self.http_host:
              b += self.http_host
          if self.http_port:
              b += ':%s' % self.http_port
          if self.http_path:
              b += self.http_path
          if self.http_query:
              b += '?%s' % self.http_query
          if self.http_status:
              if b:
                  b = '%s %s' % (b, self.http_status)
              else:
                  b = str(self.http_status)
          if self.http_reason:
              if b:
                  b = '%s %s' % (b, self.http_reason)
              else:
                  b = '- %s' % self.http_reason
          if self.http_device:
              if b:
                  b = '%s: device %s' % (b, self.http_device)
              else:
                  b = 'device %s' % self.http_device
          return b and '%s: %s' % (a, b) or a
  
  
  def http_connection(url, proxy=None):
      """
      Make an HTTPConnection or HTTPSConnection
  
      :param url: url to connect to
      :param proxy: proxy to connect through, if any; None by default; str of the
                    format 'http://127.0.0.1:8888' to set one
      :returns: tuple of (parsed url, connection object)
      :raises ClientException: Unable to handle protocol scheme
      """
      parsed = urlparse(url)
      proxy_parsed = urlparse(proxy) if proxy else None
      if parsed.scheme == 'http':
          conn = HTTPConnection((proxy_parsed if proxy else parsed).netloc)
      elif parsed.scheme == 'https':
          conn = HTTPSConnection((proxy_parsed if proxy else parsed).netloc)
      else:
          raise ClientException('Cannot handle protocol scheme %s for url %s' %
                                (parsed.scheme, repr(url)))
      if proxy:
          conn._set_tunnel(parsed.hostname, parsed.port)
      return parsed, conn
  
  
  def get_auth(url, user, key, snet=False):
      """
      Get authentication/authorization credentials.
  
      The snet parameter is used for Rackspace's ServiceNet internal network
      implementation. In this function, it simply adds *snet-* to the beginning
      of the host name for the returned storage URL. With Rackspace Cloud Files,
      use of this network path causes no bandwidth charges but requires the
      client to be running on Rackspace's ServiceNet network.
  
      :param url: authentication/authorization URL
      :param user: user to authenticate as
      :param key: key or password for authorization
      :param snet: use SERVICENET internal network (see above), default is False
      :returns: tuple of (storage URL, auth token)
      :raises ClientException: HTTP GET request to auth URL failed
      """
      parsed, conn = http_connection(url)
      conn.request('GET', parsed.path, '',
                   {'X-Auth-User': user, 'X-Auth-Key': key})
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Auth GET failed', http_scheme=parsed.scheme,
                  http_host=conn.host, http_port=conn.port,
                  http_path=parsed.path, http_status=resp.status,
                  http_reason=resp.reason)
      url = resp.getheader('x-storage-url')
      if snet:
          parsed = list(urlparse(url))
          # Second item in the list is the netloc
          parsed[1] = 'snet-' + parsed[1]
          url = urlunparse(parsed)
      return url, resp.getheader('x-storage-token',
                                                  resp.getheader('x-auth-token'))
  
  
  def get_account(url, token, marker=None, limit=None, prefix=None,
                  http_conn=None, full_listing=False):
      """
      Get a listing of containers for the account.
  
      :param url: storage URL
      :param token: auth token
      :param marker: marker query
      :param limit: limit query
      :param prefix: prefix query
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :param full_listing: if True, return a full listing, else returns a max
                           of 10000 listings
      :returns: a tuple of (response headers, a list of containers) The response
                headers will be a dict and all header names will be lowercase.
      :raises ClientException: HTTP GET request failed
      """
      if not http_conn:
          http_conn = http_connection(url)
      if full_listing:
          rv = get_account(url, token, marker, limit, prefix, http_conn)
          listing = rv[1]
          while listing:
              marker = listing[-1]['name']
              listing = \
                  get_account(url, token, marker, limit, prefix, http_conn)[1]
              if listing:
                  rv[1].extend(listing)
          return rv
      parsed, conn = http_conn
      qs = 'format=json'
      if marker:
          qs += '&marker=%s' % quote(marker)
      if limit:
          qs += '&limit=%d' % limit
      if prefix:
          qs += '&prefix=%s' % quote(prefix)
      conn.request('GET', '%s?%s' % (parsed.path, qs), '',
                   {'X-Auth-Token': token})
      resp = conn.getresponse()
      resp_headers = {}
      for header, value in resp.getheaders():
          resp_headers[header.lower()] = value
      if resp.status < 200 or resp.status >= 300:
          resp.read()
          raise ClientException('Account GET failed', http_scheme=parsed.scheme,
                  http_host=conn.host, http_port=conn.port,
                  http_path=parsed.path, http_query=qs, http_status=resp.status,
                  http_reason=resp.reason)
      if resp.status == 204:
          resp.read()
          return resp_headers, []
      return resp_headers, json_loads(resp.read())
  
  
  def head_account(url, token, http_conn=None):
      """
      Get account stats.
  
      :param url: storage URL
      :param token: auth token
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :returns: a dict containing the response's headers (all header names will
                be lowercase)
      :raises ClientException: HTTP HEAD request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url)
      conn.request('HEAD', parsed.path, '', {'X-Auth-Token': token})
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Account HEAD failed', http_scheme=parsed.scheme,
                  http_host=conn.host, http_port=conn.port,
                  http_path=parsed.path, http_status=resp.status,
                  http_reason=resp.reason)
      resp_headers = {}
      for header, value in resp.getheaders():
          resp_headers[header.lower()] = value
      return resp_headers
  
  
  def post_account(url, token, headers, http_conn=None):
      """
      Update an account's metadata.
  
      :param url: storage URL
      :param token: auth token
      :param headers: additional headers to include in the request
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :raises ClientException: HTTP POST request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url)
      headers['X-Auth-Token'] = token
      conn.request('POST', parsed.path, '', headers)
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Account POST failed',
                  http_scheme=parsed.scheme, http_host=conn.host,
                  http_port=conn.port, http_path=parsed.path,
                  http_status=resp.status, http_reason=resp.reason)
  
  
  def get_container(url, token, container, marker=None, limit=None,
                    prefix=None, delimiter=None, http_conn=None,
                    full_listing=False):
      """
      Get a listing of objects for the container.
  
      :param url: storage URL
      :param token: auth token
      :param container: container name to get a listing for
      :param marker: marker query
      :param limit: limit query
      :param prefix: prefix query
      :param delimeter: string to delimit the queries on
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :param full_listing: if True, return a full listing, else returns a max
                           of 10000 listings
      :returns: a tuple of (response headers, a list of objects) The response
                headers will be a dict and all header names will be lowercase.
      :raises ClientException: HTTP GET request failed
      """
      if not http_conn:
          http_conn = http_connection(url)
      if full_listing:
          rv = get_container(url, token, container, marker, limit, prefix,
                             delimiter, http_conn)
          listing = rv[1]
          while listing:
              if not delimiter:
                  marker = listing[-1]['name']
              else:
                  marker = listing[-1].get('name', listing[-1].get('subdir'))
              listing = get_container(url, token, container, marker, limit,
                                      prefix, delimiter, http_conn)[1]
              if listing:
                  rv[1].extend(listing)
          return rv
      parsed, conn = http_conn
      path = '%s/%s' % (parsed.path, quote(container))
      qs = 'format=json'
      if marker:
          qs += '&marker=%s' % quote(marker)
      if limit:
          qs += '&limit=%d' % limit
      if prefix:
          qs += '&prefix=%s' % quote(prefix)
      if delimiter:
          qs += '&delimiter=%s' % quote(delimiter)
      conn.request('GET', '%s?%s' % (path, qs), '', {'X-Auth-Token': token})
      resp = conn.getresponse()
      if resp.status < 200 or resp.status >= 300:
          resp.read()
          raise ClientException('Container GET failed',
                  http_scheme=parsed.scheme, http_host=conn.host,
                  http_port=conn.port, http_path=path, http_query=qs,
                  http_status=resp.status, http_reason=resp.reason)
      resp_headers = {}
      for header, value in resp.getheaders():
          resp_headers[header.lower()] = value
      if resp.status == 204:
          resp.read()
          return resp_headers, []
      return resp_headers, json_loads(resp.read())
  
  
  def head_container(url, token, container, http_conn=None):
      """
      Get container stats.
  
      :param url: storage URL
      :param token: auth token
      :param container: container name to get stats for
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :returns: a dict containing the response's headers (all header names will
                be lowercase)
      :raises ClientException: HTTP HEAD request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url)
      path = '%s/%s' % (parsed.path, quote(container))
      conn.request('HEAD', path, '', {'X-Auth-Token': token})
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Container HEAD failed',
                  http_scheme=parsed.scheme, http_host=conn.host,
                  http_port=conn.port, http_path=path, http_status=resp.status,
                  http_reason=resp.reason)
      resp_headers = {}
      for header, value in resp.getheaders():
          resp_headers[header.lower()] = value
      return resp_headers
  
  
  def put_container(url, token, container, headers=None, http_conn=None):
      """
      Create a container
  
      :param url: storage URL
      :param token: auth token
      :param container: container name to create
      :param headers: additional headers to include in the request
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :raises ClientException: HTTP PUT request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url)
      path = '%s/%s' % (parsed.path, quote(container))
      if not headers:
          headers = {}
      headers['X-Auth-Token'] = token
      conn.request('PUT', path, '', headers)
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Container PUT failed',
                  http_scheme=parsed.scheme, http_host=conn.host,
                  http_port=conn.port, http_path=path, http_status=resp.status,
                  http_reason=resp.reason)
  
  
  def post_container(url, token, container, headers, http_conn=None):
      """
      Update a container's metadata.
  
      :param url: storage URL
      :param token: auth token
      :param container: container name to update
      :param headers: additional headers to include in the request
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :raises ClientException: HTTP POST request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url)
      path = '%s/%s' % (parsed.path, quote(container))
      headers['X-Auth-Token'] = token
      conn.request('POST', path, '', headers)
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Container POST failed',
                  http_scheme=parsed.scheme, http_host=conn.host,
                  http_port=conn.port, http_path=path, http_status=resp.status,
                  http_reason=resp.reason)
  
  
  def delete_container(url, token, container, http_conn=None):
      """
      Delete a container
  
      :param url: storage URL
      :param token: auth token
      :param container: container name to delete
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :raises ClientException: HTTP DELETE request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url)
      path = '%s/%s' % (parsed.path, quote(container))
      conn.request('DELETE', path, '', {'X-Auth-Token': token})
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Container DELETE failed',
                  http_scheme=parsed.scheme, http_host=conn.host,
                  http_port=conn.port, http_path=path, http_status=resp.status,
                  http_reason=resp.reason)
  
  
  def get_object(url, token, container, name, http_conn=None,
                 resp_chunk_size=None):
      """
      Get an object
  
      :param url: storage URL
      :param token: auth token
      :param container: container name that the object is in
      :param name: object name to get
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :param resp_chunk_size: if defined, chunk size of data to read. NOTE: If
                              you specify a resp_chunk_size you must fully read
                              the object's contents before making another
                              request.
      :returns: a tuple of (response headers, the object's contents) The response
                headers will be a dict and all header names will be lowercase.
      :raises ClientException: HTTP GET request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url)
      path = '%s/%s/%s' % (parsed.path, quote(container), quote(name))
      conn.request('GET', path, '', {'X-Auth-Token': token})
      resp = conn.getresponse()
      if resp.status < 200 or resp.status >= 300:
          resp.read()
          raise ClientException('Object GET failed', http_scheme=parsed.scheme,
                  http_host=conn.host, http_port=conn.port, http_path=path,
                  http_status=resp.status, http_reason=resp.reason)
      if resp_chunk_size:
  
          def _object_body():
              buf = resp.read(resp_chunk_size)
              while buf:
                  yield buf
                  buf = resp.read(resp_chunk_size)
          object_body = _object_body()
      else:
          object_body = resp.read()
      resp_headers = {}
      for header, value in resp.getheaders():
          resp_headers[header.lower()] = value
      return resp_headers, object_body
  
  
  def head_object(url, token, container, name, http_conn=None):
      """
      Get object info
  
      :param url: storage URL
      :param token: auth token
      :param container: container name that the object is in
      :param name: object name to get info for
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :returns: a dict containing the response's headers (all header names will
                be lowercase)
      :raises ClientException: HTTP HEAD request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url)
      path = '%s/%s/%s' % (parsed.path, quote(container), quote(name))
      conn.request('HEAD', path, '', {'X-Auth-Token': token})
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Object HEAD failed', http_scheme=parsed.scheme,
                  http_host=conn.host, http_port=conn.port, http_path=path,
                  http_status=resp.status, http_reason=resp.reason)
      resp_headers = {}
      for header, value in resp.getheaders():
          resp_headers[header.lower()] = value
      return resp_headers
  
  
  def put_object(url, token=None, container=None, name=None, contents=None,
                 content_length=None, etag=None, chunk_size=65536,
                 content_type=None, headers=None, http_conn=None, proxy=None):
      """
      Put an object
  
      :param url: storage URL
      :param token: auth token; if None, no token will be sent
      :param container: container name that the object is in; if None, the
                        container name is expected to be part of the url
      :param name: object name to put; if None, the object name is expected to be
                   part of the url
      :param contents: a string or a file like object to read object data from;
                       if None, a zero-byte put will be done
      :param content_length: value to send as content-length header; also limits
                             the amount read from contents; if None, it will be
                             computed via the contents or chunked transfer
                             encoding will be used
      :param etag: etag of contents; if None, no etag will be sent
      :param chunk_size: chunk size of data to write; default 65536
      :param content_type: value to send as content-type header; if None, no
                           content-type will be set (remote end will likely try
                           to auto-detect it)
      :param headers: additional headers to include in the request, if any
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :param proxy: proxy to connect through, if any; None by default; str of the
                    format 'http://127.0.0.1:8888' to set one
      :returns: etag from server response
      :raises ClientException: HTTP PUT request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url, proxy=proxy)
      path = parsed.path
      if container:
          path = '%s/%s' % (path.rstrip('/'), quote(container))
      if name:
          path = '%s/%s' % (path.rstrip('/'), quote(name))
      if headers:
          headers = dict(headers)
      else:
          headers = {}
      if token:
          headers['X-Auth-Token'] = token
      if etag:
          headers['ETag'] = etag.strip('"')
      if content_length is not None:
          headers['Content-Length'] = str(content_length)
      else:
          for n, v in headers.iteritems():
              if n.lower() == 'content-length':
                  content_length = int(v)
      if content_type is not None:
          headers['Content-Type'] = content_type
      if not contents:
          headers['Content-Length'] = '0'
      if hasattr(contents, 'read'):
          conn.putrequest('PUT', path)
          for header, value in headers.iteritems():
              conn.putheader(header, value)
          if content_length is None:
              conn.putheader('Transfer-Encoding', 'chunked')
              conn.endheaders()
              chunk = contents.read(chunk_size)
              while chunk:
                  conn.send('%x\r\n%s\r\n' % (len(chunk), chunk))
                  chunk = contents.read(chunk_size)
              conn.send('0\r\n\r\n')
          else:
              conn.endheaders()
              left = content_length
              while left > 0:
                  size = chunk_size
                  if size > left:
                      size = left
                  chunk = contents.read(size)
                  conn.send(chunk)
                  left -= len(chunk)
      else:
          conn.request('PUT', path, contents, headers)
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Object PUT failed', http_scheme=parsed.scheme,
                  http_host=conn.host, http_port=conn.port, http_path=path,
                  http_status=resp.status, http_reason=resp.reason)
      return resp.getheader('etag', '').strip('"')
  
  
  def post_object(url, token, container, name, headers, http_conn=None):
      """
      Update object metadata
  
      :param url: storage URL
      :param token: auth token
      :param container: container name that the object is in
      :param name: name of the object to update
      :param headers: additional headers to include in the request
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :raises ClientException: HTTP POST request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url)
      path = '%s/%s/%s' % (parsed.path, quote(container), quote(name))
      headers['X-Auth-Token'] = token
      conn.request('POST', path, '', headers)
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Object POST failed', http_scheme=parsed.scheme,
                  http_host=conn.host, http_port=conn.port, http_path=path,
                  http_status=resp.status, http_reason=resp.reason)
  
  
  def delete_object(url, token=None, container=None, name=None, http_conn=None,
                    headers=None, proxy=None):
      """
      Delete object
  
      :param url: storage URL
      :param token: auth token; if None, no token will be sent
      :param container: container name that the object is in; if None, the
                        container name is expected to be part of the url
      :param name: object name to delete; if None, the object name is expected to
                   be part of the url
      :param http_conn: HTTP connection object (If None, it will create the
                        conn object)
      :param headers: additional headers to include in the request
      :param proxy: proxy to connect through, if any; None by default; str of the
                    format 'http://127.0.0.1:8888' to set one
      :raises ClientException: HTTP DELETE request failed
      """
      if http_conn:
          parsed, conn = http_conn
      else:
          parsed, conn = http_connection(url, proxy=proxy)
      path = parsed.path
      if container:
          path = '%s/%s' % (path.rstrip('/'), quote(container))
      if name:
          path = '%s/%s' % (path.rstrip('/'), quote(name))
      if headers:
          headers = dict(headers)
      else:
          headers = {}
      if token:
          headers['X-Auth-Token'] = token
      conn.request('DELETE', path, '', headers)
      resp = conn.getresponse()
      resp.read()
      if resp.status < 200 or resp.status >= 300:
          raise ClientException('Object DELETE failed',
                  http_scheme=parsed.scheme, http_host=conn.host,
                  http_port=conn.port, http_path=path, http_status=resp.status,
                  http_reason=resp.reason)
  
  
  class Connection(object):
      """Convenience class to make requests that will also retry the request"""
  
      def __init__(self, authurl, user, key, retries=5, preauthurl=None,
                   preauthtoken=None, snet=False, starting_backoff=1):
          """
          :param authurl: authenitcation URL
          :param user: user name to authenticate as
          :param key: key/password to authenticate with
          :param retries: Number of times to retry the request before failing
          :param preauthurl: storage URL (if you have already authenticated)
          :param preauthtoken: authentication token (if you have already
                               authenticated)
          :param snet: use SERVICENET internal network default is False
          """
          self.authurl = authurl
          self.user = user
          self.key = key
          self.retries = retries
          self.http_conn = None
          self.url = preauthurl
          self.token = preauthtoken
          self.attempts = 0
          self.snet = snet
          self.starting_backoff = starting_backoff
  
      def get_auth(self):
          return get_auth(self.authurl, self.user, self.key, snet=self.snet)
  
      def http_connection(self):
          return http_connection(self.url)
  
      def _retry(self, reset_func, func, *args, **kwargs):
          self.attempts = 0
          backoff = self.starting_backoff
          while self.attempts <= self.retries:
              self.attempts += 1
              try:
                  if not self.url or not self.token:
                      self.url, self.token = self.get_auth()
                      self.http_conn = None
                  if not self.http_conn:
                      self.http_conn = self.http_connection()
                  kwargs['http_conn'] = self.http_conn
                  rv = func(self.url, self.token, *args, **kwargs)
                  return rv
              except (socket.error, HTTPException):
                  if self.attempts > self.retries:
                      raise
                  self.http_conn = None
              except ClientException, err:
                  if self.attempts > self.retries:
                      raise
                  if err.http_status == 401:
                      self.url = self.token = None
                      if self.attempts > 1:
                          raise
                  elif err.http_status == 408:
                      self.http_conn = None
                  elif 500 <= err.http_status <= 599:
                      pass
                  else:
                      raise
              sleep(backoff)
              backoff *= 2
              if reset_func:
                  reset_func(func, *args, **kwargs)
  
      def head_account(self):
          """Wrapper for :func:`head_account`"""
          return self._retry(None, head_account)
  
      def get_account(self, marker=None, limit=None, prefix=None,
                      full_listing=False):
          """Wrapper for :func:`get_account`"""
          # TODO(unknown): With full_listing=True this will restart the entire
          # listing with each retry. Need to make a better version that just
          # retries where it left off.
          return self._retry(None, get_account, marker=marker, limit=limit,
                             prefix=prefix, full_listing=full_listing)
  
      def post_account(self, headers):
          """Wrapper for :func:`post_account`"""
          return self._retry(None, post_account, headers)
  
      def head_container(self, container):
          """Wrapper for :func:`head_container`"""
          return self._retry(None, head_container, container)
  
      def get_container(self, container, marker=None, limit=None, prefix=None,
                        delimiter=None, full_listing=False):
          """Wrapper for :func:`get_container`"""
          # TODO(unknown): With full_listing=True this will restart the entire
          # listing with each retry. Need to make a better version that just
          # retries where it left off.
          return self._retry(None, get_container, container, marker=marker,
                             limit=limit, prefix=prefix, delimiter=delimiter,
                             full_listing=full_listing)
  
      def put_container(self, container, headers=None):
          """Wrapper for :func:`put_container`"""
          return self._retry(None, put_container, container, headers=headers)
  
      def post_container(self, container, headers):
          """Wrapper for :func:`post_container`"""
          return self._retry(None, post_container, container, headers)
  
      def delete_container(self, container):
          """Wrapper for :func:`delete_container`"""
          return self._retry(None, delete_container, container)
  
      def head_object(self, container, obj):
          """Wrapper for :func:`head_object`"""
          return self._retry(None, head_object, container, obj)
  
      def get_object(self, container, obj, resp_chunk_size=None):
          """Wrapper for :func:`get_object`"""
          return self._retry(None, get_object, container, obj,
                             resp_chunk_size=resp_chunk_size)
  
      def put_object(self, container, obj, contents, content_length=None,
                     etag=None, chunk_size=65536, content_type=None,
                     headers=None):
          """Wrapper for :func:`put_object`"""
  
          def _default_reset(*args, **kwargs):
              raise ClientException('put_object(%r, %r, ...) failure and no '
                  'ability to reset contents for reupload.' % (container, obj))
  
          reset_func = _default_reset
          tell = getattr(contents, 'tell', None)
          seek = getattr(contents, 'seek', None)
          if tell and seek:
              orig_pos = tell()
              reset_func = lambda *a, **k: seek(orig_pos)
          elif not contents:
              reset_func = lambda *a, **k: None
  
          return self._retry(reset_func, put_object, container, obj, contents,
              content_length=content_length, etag=etag, chunk_size=chunk_size,
              content_type=content_type, headers=headers)
  
      def post_object(self, container, obj, headers):
          """Wrapper for :func:`post_object`"""
          return self._retry(None, post_object, container, obj, headers)
  
      def delete_object(self, container, obj):
          """Wrapper for :func:`delete_object`"""
          return self._retry(None, delete_object, container, obj)
  