def setAccessControl(self, path, headers, **kwargs):
"""
Set Access Controls (Can do both chmod and chown) (not implemented)
"""
path = Init_ABFS.strip_scheme(path)
params = {'action': 'setAccessControl'}
if headers is None:
headers = {}
self._patching_sl(path, params, header=headers, **kwargs)
def read(self, path, offset='0', length=0, *args, **kwargs):
"""
Read data from a file
"""
path = Init_ABFS.strip_scheme(path)
headers = self._getheaders()
if length != 0 and length != '0':
headers['range']= 'bytes=%s-%s' % (str(offset), str(int(offset) + int(length)))
return self._root.get(path, headers = headers)
def rename(self, old, new):
"""
Renames a file
"""
LOG.debug("%s\n%s" % (old, new))
headers = {'x-ms-rename-source' : '/' + Init_ABFS.strip_scheme(old) }
try:
self._create_path(new, headers=headers, overwrite=True)
except WebHdfsException as e:
if e.code == 409:
self.copy(old, new)
self.rmtree(old)
else:
raise e
def flush(self, path, params=None, headers=None, **kwargs):
"""
Flushes the data(i.e. writes appended data to File)
"""
path = Init_ABFS.strip_scheme(path)
if params is None:
LOG.warning("Params not specified")
params = {'position': 0}
if 'position' not in params:
LOG.warning("Position is not specified")
params['position'] = 0
params['action'] = 'flush'
if headers is None:
headers = {}
headers['Content-Length'] = '0'
self._patching_sl(path, params, header=headers, **kwargs)
def _append(self, path, data, size=0, offset=0 ,params=None, **kwargs):
"""
Appends the data to a file
"""
path = Init_ABFS.strip_scheme(path)
if params is None:
LOG.warn("Params not specified, Append will take longer")
resp = self._stats(path)
params = {'position' : int(resp['Content-Length']) + offset, 'action' : 'append'}
LOG.debug("%s" % params)
else:
params['action'] = 'append'
headers = {}
if size == 0 or size == '0':
headers['Content-Length'] = str(len(data))
if headers['Content-Length'] == '0':
return
else:
headers['Content-Length'] = str(size)
LOG.debug("%s" % headers)
return self._patching_sl( path, params, data, headers, **kwargs)
