def _invoke(socket, timeout, request, response=None, xid=None):
oa = OutputArchive()
if xid:
oa.write_int(xid, 'xid')
if request.type:
oa.write_int(request.type, 'type')
request.serialize(oa, 'NA')
timeout = _write(socket, struct.pack('!i', len(oa.buffer)), timeout)
timeout = _write(socket, oa.buffer, timeout)
msg, timeout = _read(socket, 4, timeout)
length = struct.unpack_from('!i', msg, 0)[0]
msg, _ = _read(socket, length, timeout)
ia = InputArchive(msg)
zxid = None
if xid:
header = ReplyHeader(None, None, None)
header.deserialize(ia, 'header')
if header.xid != xid:
raise RuntimeError('xids do not match, expected %r received %r', xid, header.xid)
if header.zxid > 0:
zxid = header.zxid
if header.err:
callback_exception = EXCEPTIONS[header.err]()
LOGGER.debug('Received error %r', callback_exception)
raise callback_exception
if response:
response.deserialize(ia, 'NA')
LOGGER.debug('Read response %r', response)
return zxid
def _read_header_and_body(socket, timeout):
msg, timeout = _read(socket, 4, timeout)
length = struct.unpack_from('!i', msg, 0)[0]
msg, _ = _read(socket, length, timeout)
input_archive = InputArchive(msg)
header = ReplyHeader(None, None, None)
header.deserialize(input_archive, 'header')
return header, input_archive
