def next(resp=None, exc=None, tb=None):
if resp and resp.data:
ctxt['res'].append(resp.data)
ctxt['offset'] += len(resp.data)
if ctxt['count'] == 0:
if offset is None:
self.offset = ctxt['offset']
return callback(''.join(ctxt['res']), exc, tb)
n = min(ctxt['count'], self.iounit)
ctxt['count'] -= n
self._dorpc(fcall.Tread(offset=ctxt['offset'], count=n), next, fail
or callback)
def read(self, count=None, offset=None, buf=''):
if count is None:
count = self.iounit
res = []
with self.lock:
offs = self.offset
if offset is not None:
offs = offset
while count > 0:
n = min(count, self.iounit)
count -= n
resp = self._dorpc(fcall.Tread(offset=offs, count=n))
data = resp.data
offs += len(data)
res.append(data)
if len(data) < n:
break
if offset is None:
self.offset = offs
return ''.join(res)