782 lines
20 KiB
Python
782 lines
20 KiB
Python
import logging
|
|
import socket
|
|
from uuid import UUID
|
|
|
|
try:
|
|
from cStringIO import StringIO
|
|
except ImportError:
|
|
from StringIO import StringIO # ignore flake8 warning: # NOQA
|
|
|
|
from cassandra import (Unavailable, WriteTimeout, ReadTimeout,
|
|
AlreadyExists, InvalidRequest, Unauthorized)
|
|
from cassandra.marshal import (int32_pack, int32_unpack, uint16_pack, uint16_unpack,
|
|
int8_pack, int8_unpack)
|
|
from cassandra.cqltypes import (AsciiType, BytesType, BooleanType,
|
|
CounterColumnType, DateType, DecimalType,
|
|
DoubleType, FloatType, Int32Type,
|
|
InetAddressType, IntegerType, ListType,
|
|
LongType, MapType, SetType, TimeUUIDType,
|
|
UTF8Type, UUIDType, lookup_casstype)
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class NotSupportedError(Exception):
|
|
pass
|
|
|
|
|
|
class InternalError(Exception):
|
|
pass
|
|
|
|
|
|
HEADER_DIRECTION_FROM_CLIENT = 0x00
|
|
HEADER_DIRECTION_TO_CLIENT = 0x80
|
|
HEADER_DIRECTION_MASK = 0x80
|
|
|
|
|
|
_message_types_by_name = {}
|
|
_message_types_by_opcode = {}
|
|
|
|
|
|
class _register_msg_type(type):
|
|
def __init__(cls, name, bases, dct):
|
|
if not name.startswith('_'):
|
|
_message_types_by_name[cls.name] = cls
|
|
_message_types_by_opcode[cls.opcode] = cls
|
|
|
|
|
|
class _MessageType(object):
|
|
__metaclass__ = _register_msg_type
|
|
|
|
tracing = False
|
|
|
|
def to_string(self, stream_id, protocol_version, compression=None):
|
|
body = StringIO()
|
|
self.send_body(body, protocol_version)
|
|
body = body.getvalue()
|
|
version = protocol_version | HEADER_DIRECTION_FROM_CLIENT
|
|
flags = 0
|
|
if compression is not None and len(body) > 0:
|
|
body = compression(body)
|
|
flags |= 0x01
|
|
if self.tracing:
|
|
flags |= 0x02
|
|
msglen = int32_pack(len(body))
|
|
msg_parts = map(int8_pack, (version, flags, stream_id, self.opcode)) + [msglen, body]
|
|
return ''.join(msg_parts)
|
|
|
|
def __str__(self):
|
|
paramstrs = ['%s=%r' % (pname, getattr(self, pname)) for pname in _get_params(self)]
|
|
return '<%s(%s)>' % (self.__class__.__name__, ', '.join(paramstrs))
|
|
__repr__ = __str__
|
|
|
|
|
|
def _get_params(message_obj):
|
|
base_attrs = dir(_MessageType)
|
|
return [a for a in dir(message_obj)
|
|
if a not in base_attrs and not a.startswith('_') and not callable(getattr(message_obj, a))]
|
|
|
|
|
|
def decode_response(stream_id, flags, opcode, body, decompressor=None):
|
|
if flags & 0x01:
|
|
if decompressor is None:
|
|
raise Exception("No decompressor available for compressed frame!")
|
|
body = decompressor(body)
|
|
flags ^= 0x01
|
|
|
|
body = StringIO(body)
|
|
if flags & 0x02:
|
|
trace_id = UUID(bytes=body.read(16))
|
|
flags ^= 0x02
|
|
else:
|
|
trace_id = None
|
|
|
|
if flags:
|
|
log.warn("Unknown protocol flags set: %02x. May cause problems.", flags)
|
|
|
|
msg_class = _message_types_by_opcode[opcode]
|
|
msg = msg_class.recv_body(body)
|
|
msg.stream_id = stream_id
|
|
msg.trace_id = trace_id
|
|
return msg
|
|
|
|
|
|
error_classes = {}
|
|
|
|
|
|
class ErrorMessage(_MessageType, Exception):
|
|
opcode = 0x00
|
|
name = 'ERROR'
|
|
summary = 'Unknown'
|
|
|
|
def __init__(self, code, message, info):
|
|
self.code = code
|
|
self.message = message
|
|
self.info = info
|
|
|
|
@classmethod
|
|
def recv_body(cls, f):
|
|
code = read_int(f)
|
|
msg = read_string(f)
|
|
subcls = error_classes.get(code, cls)
|
|
extra_info = subcls.recv_error_info(f)
|
|
return subcls(code=code, message=msg, info=extra_info)
|
|
|
|
def summary_msg(self):
|
|
msg = 'code=%04x [%s] message="%s"' \
|
|
% (self.code, self.summary, self.message)
|
|
if self.info is not None:
|
|
msg += (' info=' + repr(self.info))
|
|
return msg
|
|
|
|
def __str__(self):
|
|
return '<ErrorMessage %s>' % self.summary_msg()
|
|
__repr__ = __str__
|
|
|
|
@staticmethod
|
|
def recv_error_info(f):
|
|
pass
|
|
|
|
def to_exception(self):
|
|
return self
|
|
|
|
|
|
class ErrorMessageSubclass(_register_msg_type):
|
|
def __init__(cls, name, bases, dct):
|
|
if cls.error_code is not None:
|
|
error_classes[cls.error_code] = cls
|
|
|
|
|
|
class ErrorMessageSub(ErrorMessage):
|
|
__metaclass__ = ErrorMessageSubclass
|
|
error_code = None
|
|
|
|
|
|
class RequestExecutionException(ErrorMessageSub):
|
|
pass
|
|
|
|
|
|
class RequestValidationException(ErrorMessageSub):
|
|
pass
|
|
|
|
|
|
class ServerError(ErrorMessageSub):
|
|
summary = 'Server error'
|
|
error_code = 0x0000
|
|
|
|
|
|
class ProtocolException(ErrorMessageSub):
|
|
summary = 'Protocol error'
|
|
error_code = 0x000A
|
|
|
|
|
|
class UnavailableErrorMessage(RequestExecutionException):
|
|
summary = 'Unavailable exception'
|
|
error_code = 0x1000
|
|
|
|
@staticmethod
|
|
def recv_error_info(f):
|
|
return {
|
|
'consistency': read_consistency_level(f),
|
|
'required_replicas': read_int(f),
|
|
'alive_replicas': read_int(f),
|
|
}
|
|
|
|
def to_exception(self):
|
|
return Unavailable(self.summary_msg(), **self.info)
|
|
|
|
|
|
class OverloadedErrorMessage(RequestExecutionException):
|
|
summary = 'Coordinator node overloaded'
|
|
error_code = 0x1001
|
|
|
|
|
|
class IsBootstrappingErrorMessage(RequestExecutionException):
|
|
summary = 'Coordinator node is bootstrapping'
|
|
error_code = 0x1002
|
|
|
|
|
|
class TruncateError(RequestExecutionException):
|
|
summary = 'Error during truncate'
|
|
error_code = 0x1003
|
|
|
|
|
|
class WriteTimeoutErrorMessage(RequestExecutionException):
|
|
summary = 'Timeout during write request'
|
|
error_code = 0x1100
|
|
|
|
@staticmethod
|
|
def recv_error_info(f):
|
|
return {
|
|
'consistency': read_consistency_level(f),
|
|
'received_responses': read_int(f),
|
|
'required_responses': read_int(f),
|
|
'write_type': read_string(f),
|
|
}
|
|
|
|
def to_exception(self):
|
|
return WriteTimeout(self.summary_msg(), **self.info)
|
|
|
|
|
|
class ReadTimeoutErrorMessage(RequestExecutionException):
|
|
summary = 'Timeout during read request'
|
|
error_code = 0x1200
|
|
|
|
@staticmethod
|
|
def recv_error_info(f):
|
|
return {
|
|
'consistency': read_consistency_level(f),
|
|
'received_responses': read_int(f),
|
|
'required_responses': read_int(f),
|
|
'data_retrieved': bool(read_byte(f)),
|
|
}
|
|
|
|
def to_exception(self):
|
|
return ReadTimeout(self.summary_msg(), **self.info)
|
|
|
|
|
|
class SyntaxException(RequestValidationException):
|
|
summary = 'Syntax error in CQL query'
|
|
error_code = 0x2000
|
|
|
|
|
|
class UnauthorizedErrorMessage(RequestValidationException):
|
|
summary = 'Unauthorized'
|
|
error_code = 0x2100
|
|
|
|
def to_exception(self):
|
|
return Unauthorized(self.summary_msg())
|
|
|
|
|
|
class InvalidRequestException(RequestValidationException):
|
|
summary = 'Invalid query'
|
|
error_code = 0x2200
|
|
|
|
def to_exception(self):
|
|
return InvalidRequest(self.summary_msg())
|
|
|
|
|
|
class ConfigurationException(RequestValidationException):
|
|
summary = 'Query invalid because of configuration issue'
|
|
error_code = 0x2300
|
|
|
|
|
|
class PreparedQueryNotFound(RequestValidationException):
|
|
summary = 'Matching prepared statement not found on this node'
|
|
error_code = 0x2500
|
|
|
|
@staticmethod
|
|
def recv_error_info(f):
|
|
# return the query ID
|
|
return read_binary_string(f)
|
|
|
|
|
|
class AlreadyExistsException(ConfigurationException):
|
|
summary = 'Item already exists'
|
|
error_code = 0x2400
|
|
|
|
@staticmethod
|
|
def recv_error_info(f):
|
|
return {
|
|
'keyspace': read_string(f),
|
|
'table': read_string(f),
|
|
}
|
|
|
|
def to_exception(self):
|
|
return AlreadyExists(**self.info)
|
|
|
|
|
|
class StartupMessage(_MessageType):
|
|
opcode = 0x01
|
|
name = 'STARTUP'
|
|
|
|
KNOWN_OPTION_KEYS = set((
|
|
'CQL_VERSION',
|
|
'COMPRESSION',
|
|
))
|
|
|
|
def __init__(self, cqlversion, options):
|
|
self.cqlversion = cqlversion
|
|
self.options = options
|
|
|
|
def send_body(self, f, protocol_version):
|
|
optmap = self.options.copy()
|
|
optmap['CQL_VERSION'] = self.cqlversion
|
|
write_stringmap(f, optmap)
|
|
|
|
|
|
class ReadyMessage(_MessageType):
|
|
opcode = 0x02
|
|
name = 'READY'
|
|
|
|
@classmethod
|
|
def recv_body(cls, f):
|
|
return cls()
|
|
|
|
|
|
class AuthenticateMessage(_MessageType):
|
|
opcode = 0x03
|
|
name = 'AUTHENTICATE'
|
|
|
|
def __init__(self, authenticator):
|
|
self.authenticator = authenticator
|
|
|
|
@classmethod
|
|
def recv_body(cls, f):
|
|
authname = read_string(f)
|
|
return cls(authenticator=authname)
|
|
|
|
|
|
class CredentialsMessage(_MessageType):
|
|
opcode = 0x04
|
|
name = 'CREDENTIALS'
|
|
|
|
def __init__(self, creds):
|
|
self.creds = creds
|
|
|
|
def send_body(self, f, protocol_version):
|
|
write_short(f, len(self.creds))
|
|
for credkey, credval in self.creds.items():
|
|
write_string(f, credkey)
|
|
write_string(f, credval)
|
|
|
|
|
|
class OptionsMessage(_MessageType):
|
|
opcode = 0x05
|
|
name = 'OPTIONS'
|
|
|
|
def send_body(self, f, protocol_version):
|
|
pass
|
|
|
|
|
|
class SupportedMessage(_MessageType):
|
|
opcode = 0x06
|
|
name = 'SUPPORTED'
|
|
|
|
def __init__(self, cql_versions, options):
|
|
self.cql_versions = cql_versions
|
|
self.options = options
|
|
|
|
@classmethod
|
|
def recv_body(cls, f):
|
|
options = read_stringmultimap(f)
|
|
cql_versions = options.pop('CQL_VERSION')
|
|
return cls(cql_versions=cql_versions, options=options)
|
|
|
|
|
|
# used for QueryMessage and ExecuteMessage
|
|
_VALUES_FLAG = 0x01
|
|
_SKIP_METADATA_FLAG = 0x01
|
|
_PAGE_SIZE_FLAG = 0x04
|
|
_WITH_PAGING_STATE_SIZE_FLAG = 0x08
|
|
_WITH_SERIAL_CONSISTENCY_FLAG = 0x10
|
|
|
|
|
|
class QueryMessage(_MessageType):
|
|
opcode = 0x07
|
|
name = 'QUERY'
|
|
|
|
def __init__(self, query, consistency_level):
|
|
self.query = query
|
|
self.consistency_level = consistency_level
|
|
|
|
def send_body(self, f, protocol_version):
|
|
write_longstring(f, self.query)
|
|
write_consistency_level(f, self.consistency_level)
|
|
flags = 0x00
|
|
write_byte(f, flags)
|
|
|
|
|
|
CUSTOM_TYPE = object()
|
|
|
|
RESULT_KIND_VOID = 0x0001
|
|
RESULT_KIND_ROWS = 0x0002
|
|
RESULT_KIND_SET_KEYSPACE = 0x0003
|
|
RESULT_KIND_PREPARED = 0x0004
|
|
RESULT_KIND_SCHEMA_CHANGE = 0x0005
|
|
|
|
|
|
class ResultMessage(_MessageType):
|
|
opcode = 0x08
|
|
name = 'RESULT'
|
|
|
|
_type_codes = {
|
|
0x0000: CUSTOM_TYPE,
|
|
0x0001: AsciiType,
|
|
0x0002: LongType,
|
|
0x0003: BytesType,
|
|
0x0004: BooleanType,
|
|
0x0005: CounterColumnType,
|
|
0x0006: DecimalType,
|
|
0x0007: DoubleType,
|
|
0x0008: FloatType,
|
|
0x0009: Int32Type,
|
|
0x000A: UTF8Type,
|
|
0x000B: DateType,
|
|
0x000C: UUIDType,
|
|
0x000D: UTF8Type,
|
|
0x000E: IntegerType,
|
|
0x000F: TimeUUIDType,
|
|
0x0010: InetAddressType,
|
|
0x0020: ListType,
|
|
0x0021: MapType,
|
|
0x0022: SetType,
|
|
}
|
|
|
|
_FLAGS_GLOBAL_TABLES_SPEC = 0x0001
|
|
|
|
def __init__(self, kind, results):
|
|
self.kind = kind
|
|
self.results = results
|
|
|
|
@classmethod
|
|
def recv_body(cls, f):
|
|
kind = read_int(f)
|
|
if kind == RESULT_KIND_VOID:
|
|
results = None
|
|
elif kind == RESULT_KIND_ROWS:
|
|
results = cls.recv_results_rows(f)
|
|
elif kind == RESULT_KIND_SET_KEYSPACE:
|
|
ksname = read_string(f)
|
|
results = ksname
|
|
elif kind == RESULT_KIND_PREPARED:
|
|
results = cls.recv_results_prepared(f)
|
|
elif kind == RESULT_KIND_SCHEMA_CHANGE:
|
|
results = cls.recv_results_schema_change(f)
|
|
return cls(kind=kind, results=results)
|
|
|
|
@classmethod
|
|
def recv_results_rows(cls, f):
|
|
column_metadata = cls.recv_results_metadata(f)
|
|
rowcount = read_int(f)
|
|
rows = [cls.recv_row(f, len(column_metadata)) for x in xrange(rowcount)]
|
|
colnames = [c[2] for c in column_metadata]
|
|
coltypes = [c[3] for c in column_metadata]
|
|
return (colnames, [tuple(ctype.from_binary(val) for ctype, val in zip(coltypes, row))
|
|
for row in rows])
|
|
|
|
@classmethod
|
|
def recv_results_prepared(cls, f):
|
|
query_id = read_binary_string(f)
|
|
column_metadata = cls.recv_results_metadata(f)
|
|
return (query_id, column_metadata)
|
|
|
|
@classmethod
|
|
def recv_results_metadata(cls, f):
|
|
flags = read_int(f)
|
|
glob_tblspec = bool(flags & cls._FLAGS_GLOBAL_TABLES_SPEC)
|
|
colcount = read_int(f)
|
|
if glob_tblspec:
|
|
ksname = read_string(f)
|
|
cfname = read_string(f)
|
|
column_metadata = []
|
|
for x in xrange(colcount):
|
|
if glob_tblspec:
|
|
colksname = ksname
|
|
colcfname = cfname
|
|
else:
|
|
colksname = read_string(f)
|
|
colcfname = read_string(f)
|
|
colname = read_string(f)
|
|
coltype = cls.read_type(f)
|
|
column_metadata.append((colksname, colcfname, colname, coltype))
|
|
return column_metadata
|
|
|
|
@classmethod
|
|
def recv_results_schema_change(cls, f):
|
|
change_type = read_string(f)
|
|
keyspace = read_string(f)
|
|
table = read_string(f)
|
|
return dict(change_type=change_type, keyspace=keyspace, table=table)
|
|
|
|
@classmethod
|
|
def read_type(cls, f):
|
|
optid = read_short(f)
|
|
try:
|
|
typeclass = cls._type_codes[optid]
|
|
except KeyError:
|
|
raise NotSupportedError("Unknown data type code 0x%04x. Have to skip"
|
|
" entire result set." % (optid,))
|
|
if typeclass in (ListType, SetType):
|
|
subtype = cls.read_type(f)
|
|
typeclass = typeclass.apply_parameters(subtype)
|
|
elif typeclass == MapType:
|
|
keysubtype = cls.read_type(f)
|
|
valsubtype = cls.read_type(f)
|
|
typeclass = typeclass.apply_parameters(keysubtype, valsubtype)
|
|
elif typeclass == CUSTOM_TYPE:
|
|
classname = read_string(f)
|
|
typeclass = lookup_casstype(classname)
|
|
|
|
return typeclass
|
|
|
|
@staticmethod
|
|
def recv_row(f, colcount):
|
|
return [read_value(f) for x in xrange(colcount)]
|
|
|
|
|
|
class PrepareMessage(_MessageType):
|
|
opcode = 0x09
|
|
name = 'PREPARE'
|
|
|
|
def __init__(self, query):
|
|
self.query = query
|
|
|
|
def send_body(self, f, protocol_version):
|
|
write_longstring(f, self.query)
|
|
|
|
|
|
class ExecuteMessage(_MessageType):
|
|
opcode = 0x0A
|
|
name = 'EXECUTE'
|
|
|
|
def __init__(self, query_id, query_params, consistency_level):
|
|
self.query_id = query_id
|
|
self.query_params = query_params
|
|
self.consistency_level = consistency_level
|
|
|
|
def send_body(self, f, protocol_version):
|
|
write_string(f, self.query_id)
|
|
if protocol_version == 1:
|
|
write_short(f, len(self.query_params))
|
|
for param in self.query_params:
|
|
write_value(f, param)
|
|
write_consistency_level(f, self.consistency_level)
|
|
else:
|
|
write_consistency_level(f, self.consistency_level)
|
|
flags = _VALUES_FLAG
|
|
write_byte(f, flags)
|
|
write_short(f, len(self.query_params))
|
|
for param in self.query_params:
|
|
write_value(f, param)
|
|
|
|
|
|
class BatchMessage(_MessageType):
|
|
opcode = 0x0D
|
|
name = 'BATCH'
|
|
|
|
def __init__(self, batch_type, queries, consistency_level):
|
|
self.batch_type = batch_type
|
|
self.queries = queries
|
|
self.consistency_level = consistency_level
|
|
|
|
def send_body(self, f, protocol_version):
|
|
write_byte(f, self.batch_type.value)
|
|
write_short(f, len(self.queries))
|
|
for string_or_query_id, params in self.queries:
|
|
if isinstance(string_or_query_id, basestring):
|
|
write_byte(f, 0)
|
|
write_longstring(f, string_or_query_id)
|
|
else:
|
|
write_byte(f, 1)
|
|
write_short(f, string_or_query_id)
|
|
write_short(f, len(params))
|
|
for param in params:
|
|
write_value(f, param)
|
|
|
|
write_consistency_level(f, self.consistency_level)
|
|
|
|
|
|
known_event_types = frozenset((
|
|
'TOPOLOGY_CHANGE',
|
|
'STATUS_CHANGE',
|
|
'SCHEMA_CHANGE'
|
|
))
|
|
|
|
|
|
class RegisterMessage(_MessageType):
|
|
opcode = 0x0B
|
|
name = 'REGISTER'
|
|
|
|
def __init__(self, event_list):
|
|
self.event_list = event_list
|
|
|
|
def send_body(self, f, protocol_version):
|
|
write_stringlist(f, self.event_list)
|
|
|
|
|
|
class EventMessage(_MessageType):
|
|
opcode = 0x0C
|
|
name = 'EVENT'
|
|
|
|
def __init__(self, event_type, event_args):
|
|
self.event_type = event_type
|
|
self.event_args = event_args
|
|
|
|
@classmethod
|
|
def recv_body(cls, f):
|
|
event_type = read_string(f).upper()
|
|
if event_type in known_event_types:
|
|
read_method = getattr(cls, 'recv_' + event_type.lower())
|
|
return cls(event_type=event_type, event_args=read_method(f))
|
|
raise NotSupportedError('Unknown event type %r' % event_type)
|
|
|
|
@classmethod
|
|
def recv_topology_change(cls, f):
|
|
# "NEW_NODE" or "REMOVED_NODE"
|
|
change_type = read_string(f)
|
|
address = read_inet(f)
|
|
return dict(change_type=change_type, address=address)
|
|
|
|
@classmethod
|
|
def recv_status_change(cls, f):
|
|
# "UP" or "DOWN"
|
|
change_type = read_string(f)
|
|
address = read_inet(f)
|
|
return dict(change_type=change_type, address=address)
|
|
|
|
@classmethod
|
|
def recv_schema_change(cls, f):
|
|
# "CREATED", "DROPPED", or "UPDATED"
|
|
change_type = read_string(f)
|
|
keyspace = read_string(f)
|
|
table = read_string(f)
|
|
return dict(change_type=change_type, keyspace=keyspace, table=table)
|
|
|
|
|
|
def read_byte(f):
|
|
return int8_unpack(f.read(1))
|
|
|
|
|
|
def write_byte(f, b):
|
|
f.write(int8_pack(b))
|
|
|
|
|
|
def read_int(f):
|
|
return int32_unpack(f.read(4))
|
|
|
|
|
|
def write_int(f, i):
|
|
f.write(int32_pack(i))
|
|
|
|
|
|
def read_short(f):
|
|
return uint16_unpack(f.read(2))
|
|
|
|
|
|
def write_short(f, s):
|
|
f.write(uint16_pack(s))
|
|
|
|
|
|
def read_consistency_level(f):
|
|
return read_short(f)
|
|
|
|
|
|
def write_consistency_level(f, cl):
|
|
write_short(f, cl)
|
|
|
|
|
|
def read_string(f):
|
|
size = read_short(f)
|
|
contents = f.read(size)
|
|
return contents.decode('utf8')
|
|
|
|
|
|
def read_binary_string(f):
|
|
size = read_short(f)
|
|
contents = f.read(size)
|
|
return contents
|
|
|
|
|
|
def write_string(f, s):
|
|
if isinstance(s, unicode):
|
|
s = s.encode('utf8')
|
|
write_short(f, len(s))
|
|
f.write(s)
|
|
|
|
|
|
def read_longstring(f):
|
|
size = read_int(f)
|
|
contents = f.read(size)
|
|
return contents.decode('utf8')
|
|
|
|
|
|
def write_longstring(f, s):
|
|
if isinstance(s, unicode):
|
|
s = s.encode('utf8')
|
|
write_int(f, len(s))
|
|
f.write(s)
|
|
|
|
|
|
def read_stringlist(f):
|
|
numstrs = read_short(f)
|
|
return [read_string(f) for x in xrange(numstrs)]
|
|
|
|
|
|
def write_stringlist(f, stringlist):
|
|
write_short(f, len(stringlist))
|
|
for s in stringlist:
|
|
write_string(f, s)
|
|
|
|
|
|
def read_stringmap(f):
|
|
numpairs = read_short(f)
|
|
strmap = {}
|
|
for x in xrange(numpairs):
|
|
k = read_string(f)
|
|
strmap[k] = read_string(f)
|
|
return strmap
|
|
|
|
|
|
def write_stringmap(f, strmap):
|
|
write_short(f, len(strmap))
|
|
for k, v in strmap.items():
|
|
write_string(f, k)
|
|
write_string(f, v)
|
|
|
|
|
|
def read_stringmultimap(f):
|
|
numkeys = read_short(f)
|
|
strmmap = {}
|
|
for x in xrange(numkeys):
|
|
k = read_string(f)
|
|
strmmap[k] = read_stringlist(f)
|
|
return strmmap
|
|
|
|
|
|
def write_stringmultimap(f, strmmap):
|
|
write_short(f, len(strmmap))
|
|
for k, v in strmmap.items():
|
|
write_string(f, k)
|
|
write_stringlist(f, v)
|
|
|
|
|
|
def read_value(f):
|
|
size = read_int(f)
|
|
if size < 0:
|
|
return None
|
|
return f.read(size)
|
|
|
|
|
|
def write_value(f, v):
|
|
if v is None:
|
|
write_int(f, -1)
|
|
else:
|
|
write_int(f, len(v))
|
|
f.write(v)
|
|
|
|
|
|
def read_inet(f):
|
|
size = read_byte(f)
|
|
addrbytes = f.read(size)
|
|
port = read_int(f)
|
|
if size == 4:
|
|
addrfam = socket.AF_INET
|
|
elif size == 16:
|
|
addrfam = socket.AF_INET6
|
|
else:
|
|
raise InternalError("bad inet address: %r" % (addrbytes,))
|
|
return (socket.inet_ntop(addrfam, addrbytes), port)
|
|
|
|
|
|
def write_inet(f, addrtuple):
|
|
addr, port = addrtuple
|
|
if ':' in addr:
|
|
addrfam = socket.AF_INET6
|
|
else:
|
|
addrfam = socket.AF_INET
|
|
addrbytes = socket.inet_pton(addrfam, addr)
|
|
write_byte(f, len(addrbytes))
|
|
f.write(addrbytes)
|
|
write_int(f, port)
|