本文整理汇总了Python中pymysql.util.int2byte函数的典型用法代码示例。如果您正苦于以下问题：Python int2byte函数的具体用法？Python int2byte怎么用？Python int2byte使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了int2byte函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Python代码示例。
示例1: send_data
def send_data(self):
"""Send data packets from the local file to the server"""
if not self.connection._writer:
raise InterfaceError("(0, '')")
# sequence id is 2 as we already sent a query packet
seq_id = 2
try:
yield from self._open_file()
chunk_size = MAX_PACKET_LEN
while True:
chunk = yield from self._file_read(chunk_size)
if not chunk:
break
packet = (struct.pack('<i', len(chunk))[:3] +
int2byte(seq_id))
format_str = '!{0}s'.format(len(chunk))
packet += struct.pack(format_str, chunk)
self.connection._write_bytes(packet)
seq_id += 1
finally:
# send the empty packet to signify we are done sending data
packet = struct.pack('<i', 0)[:3] + int2byte(seq_id)
self.connection._write_bytes(packet)
开发者ID:Yucie，项目名称:Arianrhod，代码行数:25，代码来源:connection.py
示例2: _execute_command
def _execute_command(self, command, sql):
if not self._writer:
raise InterfaceError("(0, 'Not connected')")
# If the last query was unbuffered, make sure it finishes before
# sending new commands
if self._result is not None and self._result.unbuffered_active:
yield from self._result._finish_unbuffered_query()
if isinstance(sql, str):
sql = sql.encode(self._encoding)
chunk_size = min(MAX_PACKET_LEN, len(sql) + 1) # +1 is for command
prelude = struct.pack('<i', chunk_size) + int2byte(command)
self._write_bytes(prelude + sql[:chunk_size - 1])
# logger.debug(dump_packet(prelude + sql))
if chunk_size < MAX_PACKET_LEN:
return
seq_id = 1
sql = sql[chunk_size - 1:]
while True:
chunk_size = min(MAX_PACKET_LEN, len(sql))
prelude = struct.pack('<i', chunk_size)[:3]
data = prelude + int2byte(seq_id % 256) + sql[:chunk_size]
self._write_bytes(data)
# logger.debug(dump_packet(data))
sql = sql[chunk_size:]
if not sql and chunk_size < MAX_PACKET_LEN:
break
seq_id += 1
开发者ID:Yucie，项目名称:Arianrhod，代码行数:32，代码来源:connection.py
示例3: test_datatypes
def test_datatypes(connection, cursor, datatype_table):
# insert values
v = (
True, -3, 123456789012, 5.7, "hello'\" world",
u"Espa\xc3\xb1ol",
"binary\x00data".encode(connection.charset),
datetime.date(1988, 2, 2),
datetime.datetime.now().replace(microsecond=0),
datetime.timedelta(5, 6), datetime.time(16, 32),
time.localtime())
yield from cursor.execute(
"INSERT INTO test_datatypes (b,i,l,f,s,u,bb,d,dt,td,t,st) "
"values (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)",
v)
yield from cursor.execute(
"select b,i,l,f,s,u,bb,d,dt,td,t,st from test_datatypes")
r = yield from cursor.fetchone()
assert util.int2byte(1) == r[0]
# assert v[1:8] == r[1:8])
assert v[1:9] == r[1:9]
# mysql throws away microseconds so we need to check datetimes
# specially. additionally times are turned into timedeltas.
# self.assertEqual(datetime.datetime(*v[8].timetuple()[:6]), r[8])
# TODO: figure out why this assert fails
# assert [9] == r[9] # just timedeltas
expected = datetime.timedelta(0, 60 * (v[10].hour * 60 + v[10].minute))
assert expected == r[10]
assert datetime.datetime(*v[-1][:6]) == r[-1]
开发者ID:AlexLisovoy，项目名称:aiomysql，代码行数:29，代码来源:test_basic.py
示例4: __connect_to_stream
def __connect_to_stream(self):
self._stream_connection = pymysql.connect(**self.__connection_settings)
cur = self._stream_connection.cursor()
cur.execute("SHOW MASTER STATUS")
(log_file, log_pos) = cur.fetchone()[:2]
cur.close()
# binlog_pos (4) -- position in the binlog-file to start the stream with
# flags (2) BINLOG_DUMP_NON_BLOCK (0 or 1)
# server_id (4) -- server id of this slave
# binlog-filename (string.EOF) -- filename of the binlog on the master
command = COM_BINLOG_DUMP
prelude = struct.pack('<i', len(log_file) + 11) \
+ int2byte(command)
if self.__log_pos is None:
if self.__resume_stream:
prelude += struct.pack('<I', log_pos)
else:
prelude += struct.pack('<I', 4)
else:
prelude += struct.pack('<I', self.__log_pos)
if self.__blocking:
prelude += struct.pack('<h', 0)
else:
prelude += struct.pack('<h', 1)
prelude += struct.pack('<I', self.__server_id)
self._stream_connection.wfile.write(prelude + log_file.encode())
self._stream_connection.wfile.flush()
self.__connected = True
开发者ID:AmitShah，项目名称:wibid，代码行数:30，代码来源:binlogstream.py
示例5: connect_to_stream
def connect_to_stream(self, custom_log_pos=None):
self._stream_connection = pymysql.connect(**self.__connection_settings)
(log_file, log_pos) = self.get_master_binlog_pos()
# flags (2) BINLOG_DUMP_NON_BLOCK (0 or 1)
# server_id (4) -- server id of this slave
# binlog-filename (string.EOF) -- filename of the binlog on the master
if custom_log_pos is not None:
self.log_pos = custom_log_pos
command = COM_BINLOG_DUMP
prelude = struct.pack("<i", len(log_file) + 11) + int2byte(command)
if self.log_pos is None:
if self.__resume_stream:
prelude += struct.pack("<I", log_pos)
else:
prelude += struct.pack("<I", self.starting_binlog_pos)
else:
prelude += struct.pack("<I", self.log_pos)
if self.__blocking:
prelude += struct.pack("<h", 0)
else:
prelude += struct.pack("<h", 1)
prelude += struct.pack("<I", self.__server_id)
self._stream_connection.wfile.write(prelude + log_file.encode())
self._stream_connection.wfile.flush()
self.__connected = True
开发者ID:memsql，项目名称:ditto，代码行数:25，代码来源:binlogstream.py
示例6: __connect_to_stream
def __connect_to_stream(self):
# log_pos (4) -- position in the binlog-file to start the stream with
# flags (2) BINLOG_DUMP_NON_BLOCK (0 or 1)
# server_id (4) -- server id of this slave
# log_file (string.EOF) -- filename of the binlog on the master
self._stream_connection = pymysql.connect(**self.__connection_settings)
# only when log_file and log_pos both provided, the position info is
# valid, if not, get the current position from master
if self.log_file is None or self.log_pos is None:
cur = self._stream_connection.cursor()
cur.execute("SHOW MASTER STATUS")
self.log_file, self.log_pos = cur.fetchone()[:2]
cur.close()
prelude = struct.pack('<i', len(self.log_file) + 11) \
+ int2byte(COM_BINLOG_DUMP)
if self.__resume_stream:
prelude += struct.pack('<I', self.log_pos)
else:
prelude += struct.pack('<I', 4)
if self.__blocking:
prelude += struct.pack('<h', 0)
else:
prelude += struct.pack('<h', 1)
prelude += struct.pack('<I', self.__server_id)
prelude += self.log_file.encode()
self._stream_connection.wfile.write(prelude)
self._stream_connection.wfile.flush()
self.__connected_stream = True
开发者ID:liorsion，项目名称:python-mysql-replication，代码行数:34，代码来源:binlogstream.py
示例7: test_datatypes
def test_datatypes(self):
""" test every data type """
conn = self.connections[0]
c = conn.cursor()
c.execute("create table test_datatypes (b bit, i int, l bigint, f real, s varchar(32), u varchar(32), bb blob, d date, dt datetime, ts timestamp, td time, t time, st datetime)")
try:
# insert values
v = (True, -3, 123456789012, 5.7, "hello'\" world", u"Espa\xc3\xb1ol", "binary\x00data".encode(conn.charset), datetime.date(1988,2,2), datetime.datetime(2014, 5, 15, 7, 45, 57), datetime.timedelta(5,6), datetime.time(16,32), time.localtime())
c.execute("insert into test_datatypes (b,i,l,f,s,u,bb,d,dt,td,t,st) values (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)", v)
c.execute("select b,i,l,f,s,u,bb,d,dt,td,t,st from test_datatypes")
r = c.fetchone()
self.assertEqual(util.int2byte(1), r[0])
self.assertEqual(v[1:10], r[1:10])
self.assertEqual(datetime.timedelta(0, 60 * (v[10].hour * 60 + v[10].minute)), r[10])
self.assertEqual(datetime.datetime(*v[-1][:6]), r[-1])
c.execute("delete from test_datatypes")
# check nulls
c.execute("insert into test_datatypes (b,i,l,f,s,u,bb,d,dt,td,t,st) values (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)", [None] * 12)
c.execute("select b,i,l,f,s,u,bb,d,dt,td,t,st from test_datatypes")
r = c.fetchone()
self.assertEqual(tuple([None] * 12), r)
c.execute("delete from test_datatypes")
# check sequence type
c.execute("insert into test_datatypes (i, l) values (2,4), (6,8), (10,12)")
c.execute("select l from test_datatypes where i in %s order by i", ((2,6),))
r = c.fetchall()
self.assertEqual(((4,),(8,)), r)
finally:
c.execute("drop table test_datatypes")
开发者ID:32footsteps，项目名称:SpecialCollectionsProject，代码行数:34，代码来源:test_basic.py
示例8: ensure_closed
def ensure_closed(self):
"""Send quit command and then close socket connection"""
if self._writer is None:
# connection has been closed
return
send_data = struct.pack('<i', 1) + int2byte(COMMAND.COM_QUIT)
self._writer.write(send_data)
yield from self._writer.drain()
self.close()
开发者ID:Drizzt1991，项目名称:aiomysql，代码行数:9，代码来源:connection.py
示例9: write_packet
def write_packet(self, payload):
"""Writes an entire "mysql packet" in its entirety to the network
addings its length and sequence number.
"""
# Internal note: when you build packet manualy and calls _write_bytes()
# directly, you should set self._next_seq_id properly.
data = pack_int24(len(payload)) + int2byte(self._next_seq_id) + payload
self._write_bytes(data)
self._next_seq_id = (self._next_seq_id + 1) % 256
开发者ID:Drizzt1991，项目名称:aiomysql，代码行数:9，代码来源:connection.py
示例10: _request_authentication
def _request_authentication(self):
self.client_flag |= CAPABILITIES
if int(self.server_version.split('.', 1)[0]) >= 5:
self.client_flag |= MULTI_RESULTS
if self._user is None:
raise ValueError("Did not specify a username")
charset_id = charset_by_name(self._charset).id
user = self._user
if isinstance(self._user, str):
user = self._user.encode(self._encoding)
data_init = struct.pack('<iIB23s', self.client_flag, 1,
charset_id, b'')
next_packet = 1
data = data_init + user + b'\0' + _scramble(
self._password.encode('latin1'), self.salt)
if self._db:
db = self._db
if isinstance(self._db, str):
db = self._db.encode(self._encoding)
data += db + int2byte(0)
data = pack_int24(len(data)) + int2byte(next_packet) + data
next_packet += 2
# logger.debug(dump_packet(data))
self._write_bytes(data)
auth_packet = yield from self._read_packet()
# if old_passwords is enabled the packet will be 1 byte long and
# have the octet 254
if auth_packet.is_eof_packet():
# send legacy handshake
data = _scramble_323(self._password.encode('latin1'),
self.salt) + b'\0'
data = pack_int24(len(data)) + int2byte(next_packet) + data
self._write_bytes(data)
auth_packet = self._read_packet()
开发者ID:Yucie，项目名称:Arianrhod，代码行数:44，代码来源:connection.py
示例11: encoded
def encoded(self, server_id, master_id=0):
"""
server_id: the slave server-id
master_id: usually 0. Appears as "master id" in SHOW SLAVE HOSTS
on the master. Unknown what else it impacts.
"""
# 1 [15] COM_REGISTER_SLAVE
# 4 server-id
# 1 slaves hostname length
# string[$len] slaves hostname
# 1 slaves user len
# string[$len] slaves user
# 1 slaves password len
# string[$len] slaves password
# 2 slaves mysql-port
# 4 replication rank
# 4 master-id
lhostname = len(self.hostname)
lusername = len(self.username)
lpassword = len(self.password)
packet_len = (1 + # command
4 + # server-id
1 + # hostname length
lhostname +
1 + # username length
lusername +
1 + # password length
lpassword +
2 + # slave mysql port
4 + # replication rank
4) # master-id
MAX_STRING_LEN = 257 # one byte for length + 256 chars
return (struct.pack('<i', packet_len) +
int2byte(COM_REGISTER_SLAVE) +
struct.pack('<L', server_id) +
struct.pack('<%dp' % min(MAX_STRING_LEN, lhostname + 1),
self.hostname) +
struct.pack('<%dp' % min(MAX_STRING_LEN, lusername + 1),
self.username) +
struct.pack('<%dp' % min(MAX_STRING_LEN, lpassword + 1),
self.password) +
struct.pack('<H', self.port) +
struct.pack('<l', 0) +
struct.pack('<l', master_id))
开发者ID:32kb，项目名称:python-mysql-replication，代码行数:49，代码来源:binlogstream.py
示例12: __connect_to_stream
def __connect_to_stream(self):
# log_pos (4) -- position in the binlog-file to start the stream with
# flags (2) BINLOG_DUMP_NON_BLOCK (0 or 1)
# server_id (4) -- server id of this slave
# log_file (string.EOF) -- filename of the binlog on the master
self._stream_connection = pymysql.connect(**self.__connection_settings)
self.__use_checksum = self.__checksum_enabled()
#If cheksum is enabled we need to inform the server about the that we support it
if self.__use_checksum:
cur = self._stream_connection.cursor()
cur.execute("set @master_binlog_checksum= @@global.binlog_checksum")
cur.close()
# only when log_file and log_pos both provided, the position info is
# valid, if not, get the current position from master
if self.log_file is None or self.log_pos is None:
cur = self._stream_connection.cursor()
cur.execute("SHOW MASTER STATUS")
self.log_file, self.log_pos = cur.fetchone()[:2]
cur.close()
prelude = struct.pack('<i', len(self.log_file) + 11) \
+ int2byte(COM_BINLOG_DUMP)
if self.__resume_stream:
prelude += struct.pack('<I', self.log_pos)
else:
prelude += struct.pack('<I', 4)
if self.__blocking:
prelude += struct.pack('<h', 0)
else:
prelude += struct.pack('<h', 1)
prelude += struct.pack('<I', self.__server_id)
prelude += self.log_file.encode()
if pymysql.__version__ < "0.6":
self._stream_connection.wfile.write(prelude)
self._stream_connection.wfile.flush()
else:
self._stream_connection._write_bytes(prelude)
self.__connected_stream = True
开发者ID:heng4fun，项目名称:python-mysql-replication，代码行数:45，代码来源:binlogstream.py
示例13: _get_server_information
def _get_server_information(self):
i = 0
packet = yield from self._read_packet()
data = packet.get_all_data()
# logger.debug(dump_packet(data))
self.protocol_version = byte2int(data[i:i + 1])
i += 1
server_end = data.find(int2byte(0), i)
self.server_version = data[i:server_end].decode('latin1')
i = server_end + 1
self.server_thread_id = struct.unpack('<I', data[i:i + 4])
i += 4
self.salt = data[i:i + 8]
i += 9 # 8 + 1(filler)
self.server_capabilities = struct.unpack('<H', data[i:i + 2])[0]
i += 2
if len(data) >= i + 6:
lang, stat, cap_h, salt_len = struct.unpack('<BHHB', data[i:i + 6])
i += 6
self.server_language = lang
self.server_charset = charset_by_id(lang).name
self.server_status = stat
# logger.debug("server_status: %s" % _convert_to_str(stat))
self.server_capabilities |= cap_h << 16
# logger.debug("salt_len: %s" % _convert_to_str(salt_len))
salt_len = max(12, salt_len - 9)
# reserved
i += 10
if len(data) >= i + salt_len:
# salt_len includes auth_plugin_data_part_1 and filler
self.salt += data[i:i + salt_len]
开发者ID:Drizzt1991，项目名称:aiomysql，代码行数:39，代码来源:connection.py
示例14: test_datatypes
def test_datatypes(self):
""" test every data type """
conn = self.connections[0]
c = conn.cursor()
c.execute
try:
# insert values
v = (True, -3, 123456789012, 5.7, "hello'\" world", u"Espa\xc3\xb1ol", "binary\x00data".encode(conn.charset), datetime.date(1988,2,2), datetime.datetime.now(), datetime.timedelta(5,6), datetime.time(16,32), time.localtime())
c.execute
c.execute
r = c.fetchone()
self.assertEqual(util.int2byte(1), r[0])
self.assertEqual(v[1:8], r[1:8])
# mysql throws away microseconds so we need to check datetimes
# specially. additionally times are turned into timedeltas.
self.assertEqual(datetime.datetime(*v[8].timetuple()[:6]), r[8])
self.assertEqual(v[9], r[9]) # just timedeltas
self.assertEqual(datetime.timedelta(0, 60 * (v[10].hour * 60 + v[10].minute)), r[10])
self.assertEqual(datetime.datetime(*v[-1][:6]), r[-1])
c.execute
# check nulls
c.execute
c.execute
r = c.fetchone()
self.assertEqual(tuple([None] * 12), r)
c.execute
# check sequence type
c.execute
c.execute
r = c.fetchall()
self.assertEqual(((4,),(8,)), r)
finally:
c.execute
开发者ID:andrasmakoviczki，项目名称:ec2_instance_power，代码行数:37，代码来源:test_basic.py
示例15: _request_authentication
def _request_authentication(self):
self.client_flag |= CAPABILITIES
if self.server_version.startswith('5'):
self.client_flag |= MULTI_RESULTS
if self.user is None:
raise ValueError("Did not specify a username")
charset_id = charset_by_name(self.charset).id
if isinstance(self.user, text_type):
self.user = self.user.encode(self.encoding)
data_init = struct.pack('<i', self.client_flag) + struct.pack("<I", 1) + \
int2byte(charset_id) + int2byte(0)*23
next_packet = 1
if self.ssl:
data = pack_int24(len(data_init)) + int2byte(next_packet) + data_init
next_packet += 1
if DEBUG: dump_packet(data)
self._write_bytes(data)
self.socket = ssl.wrap_socket(self.socket, keyfile=self.key,
certfile=self.cert,
ssl_version=ssl.PROTOCOL_TLSv1,
cert_reqs=ssl.CERT_REQUIRED,
ca_certs=self.ca)
data = data_init + self.user + b'\0' + self.forwarded_auth_response
if self.db:
if isinstance(self.db, text_type):
self.db = self.db.encode(self.encoding)
data += self.db + int2byte(0)
data = pack_int24(len(data)) + int2byte(next_packet) + data
next_packet += 2
if DEBUG: dump_packet(data)
self._write_bytes(data)
auth_packet = MysqlPacket(self)
auth_packet.check_error()
if DEBUG: auth_packet.dump()
# if old_passwords is enabled the packet will be 1 byte long and
# have the octet 254
if auth_packet.is_eof_packet():
# send legacy handshake
#raise NotImplementedError, "old_passwords are not supported. Check to see if mysqld was started with --old-passwords, if old-passwords=1 in a my.cnf file, or if there are some short hashes in your mysql.user table."
# TODO: is this the correct charset?
data = _scramble_323(self.password.encode(self.encoding), self.salt.encode(self.encoding)) + b'\0'
data = pack_int24(len(data)) + int2byte(next_packet) + data
self._write_bytes(data)
auth_packet = MysqlPacket(self)
auth_packet.check_error()
if DEBUG: auth_packet.dump()
开发者ID:huangdehui2013，项目名称:mysqlproxy，代码行数:62，代码来源:forward_auth.py
示例16: __connect_to_stream
def __connect_to_stream(self):
# log_pos (4) -- position in the binlog-file to start the stream with
# flags (2) BINLOG_DUMP_NON_BLOCK (0 or 1)
# server_id (4) -- server id of this slave
# log_file (string.EOF) -- filename of the binlog on the master
self._stream_connection = pymysql.connect(**self.__connection_settings)
self.__use_checksum = self.__checksum_enabled()
#If cheksum is enabled we need to inform the server about the that we support it
if self.__use_checksum:
cur = self._stream_connection.cursor()
cur.execute("set @master_binlog_checksum= @@global.binlog_checksum")
cur.close()
if not self.auto_position:
# only when log_file and log_pos both provided, the position info is
# valid, if not, get the current position from master
if self.log_file is None or self.log_pos is None:
cur = self._stream_connection.cursor()
cur.execute("SHOW MASTER STATUS")
self.log_file, self.log_pos = cur.fetchone()[:2]
cur.close()
prelude = struct.pack('<i', len(self.log_file) + 11) \
+ int2byte(COM_BINLOG_DUMP)
if self.__resume_stream:
prelude += struct.pack('<I', self.log_pos)
else:
prelude += struct.pack('<I', 4)
if self.__blocking:
prelude += struct.pack('<h', 0)
else:
prelude += struct.pack('<h', 1)
prelude += struct.pack('<I', self.__server_id)
prelude += self.log_file.encode()
else:
# Format for mysql packet master_auto_position
#
# All fields are little endian
# All fields are unsigned
# Packet length uint 4bytes
# Packet type byte 1byte == 0x1e
# Binlog flags ushort 2bytes == 0 (for retrocompatibilty)
# Server id uint 4bytes
# binlognamesize uint 4bytes
# binlogname str Nbytes N = binlognamesize
# Zeroified
# binlog position uint 4bytes == 4
# payload_size uint 4bytes
## What come next, is the payload, where the slave gtid_executed
## is sent to the master
# n_sid ulong 8bytes == which size is the gtid_set
# | sid uuid 16bytes UUID as a binary
# | n_intervals ulong 8bytes == how many intervals are sent for this gtid
# | | start ulong 8bytes Start position of this interval
# | | stop ulong 8bytes Stop position of this interval
# A gtid set looks like:
# 19d69c1e-ae97-4b8c-a1ef-9e12ba966457:1-3:8-10,
# 1c2aad49-ae92-409a-b4df-d05a03e4702e:42-47:80-100:130-140
#
# In this particular gtid set, 19d69c1e-ae97-4b8c-a1ef-9e12ba966457:1-3:8-10
# is the first member of the set, it is called a gtid.
# In this gtid, 19d69c1e-ae97-4b8c-a1ef-9e12ba966457 is the sid
# and have two intervals, 1-3 and 8-10, 1 is the start position of the first interval
# 3 is the stop position of the first interval.
gtid_set = GtidSet(self.auto_position)
encoded_data_size = gtid_set.encoded_length
header_size = (2 + # binlog_flags
4 + # server_id
4 + # binlog_name_info_size
4 + # empty binlog name
8 + # binlog_pos_info_size
4) # encoded_data_size
prelude = b'' + struct.pack('<i', header_size + encoded_data_size) \
+ int2byte(COM_BINLOG_DUMP_GTID)
# binlog_flags = 0 (2 bytes)
prelude += struct.pack('<H', 0)
# server_id (4 bytes)
prelude += struct.pack('<I', self.__server_id)
# binlog_name_info_size (4 bytes)
prelude += struct.pack('<I', 3)
# empty_binlog_name (4 bytes)
prelude += b'\0\0\0'
# binlog_pos_info (8 bytes)
prelude += struct.pack('<Q', 4)
# encoded_data_size (4 bytes)
prelude += struct.pack('<I', gtid_set.encoded_length)
# encoded_data
#.........这里部分代码省略.........
开发者ID:krazybean，项目名称:python-mysql-replication，代码行数:101，代码来源:binlogstream.py
示例17: wait_closed
def wait_closed(self):
"""Send quit command and then close socket connection"""
send_data = struct.pack("<i", 1) + int2byte(COM_QUIT)
self._writer.write(send_data)
yield from self._writer.drain()
self.close()
开发者ID:QuocHuy7a10，项目名称:Arianrhod，代码行数:6，代码来源:connection.py
示例18: __connect_to_stream
def __connect_to_stream(self):
# log_pos (4) -- position in the binlog-file to start the stream with
# flags (2) BINLOG_DUMP_NON_BLOCK (0 or 1)
# server_id (4) -- server id of this slave
# log_file (string.EOF) -- filename of the binlog on the master
self._stream_connection = self.pymysql_wrapper(**self.__connection_settings)
self.__use_checksum = self.__checksum_enabled()
# If checksum is enabled we need to inform the server about the that
# we support it
if self.__use_checksum:
cur = self._stream_connection.cursor()
cur.execute("set @master_binlog_checksum= @@global.binlog_checksum")
cur.close()
if self.slave_uuid:
cur = self._stream_connection.cursor()
cur.execute("set @slave_uuid= '%s'" % self.slave_uuid)
cur.close()
if self.slave_heartbeat:
# 4294967 is documented as the max value for heartbeats
net_timeout = float(self.__connection_settings.get('read_timeout',
4294967))
# If heartbeat is too low, the connection will disconnect before,
# this is also the behavior in mysql
heartbeat = float(min(net_timeout/2., self.slave_heartbeat))
if heartbeat > 4294967:
heartbeat = 4294967
# master_heartbeat_period is nanoseconds
heartbeat = int(heartbeat * 1000000000)
cur = self._stream_connection.cursor()
cur.execute("set @master_heartbeat_period= %d" % heartbeat)
cur.close()
self._register_slave()
if not self.auto_position:
# only when log_file and log_pos both provided, the position info is
# valid, if not, get the current position from master
if self.log_file is None or self.log_pos is None:
cur = self._stream_connection.cursor()
cur.execute("SHOW MASTER STATUS")
master_status = cur.fetchone()
if master_status is None:
raise BinLogNotEnabled()
self.log_file, self.log_pos = master_status[:2]
cur.close()
prelude = struct.pack('<i', len(self.log_file) + 11) \
+ int2byte(COM_BINLOG_DUMP)
if self.__resume_stream:
prelude += struct.pack('<I', self.log_pos)
else:
prelude += struct.pack('<I', 4)
flags = 0
if not self.__blocking:
flags |= 0x01 # BINLOG_DUMP_NON_BLOCK
prelude += struct.pack('<H', flags)
prelude += struct.pack('<I', self.__server_id)
prelude += self.log_file.encode()
else:
# Format for mysql packet master_auto_position
#
# All fields are little endian
# All fields are unsigned
# Packet length uint 4bytes
# Packet type byte 1byte == 0x1e
# Binlog flags ushort 2bytes == 0 (for retrocompatibilty)
# Server id uint 4bytes
# binlognamesize uint 4bytes
# binlogname str Nbytes N = binlognamesize
# Zeroified
# binlog position uint 4bytes == 4
# payload_size uint 4bytes
# What come next, is the payload, where the slave gtid_executed
# is sent to the master
# n_sid ulong 8bytes == which size is the gtid_set
# | sid uuid 16bytes UUID as a binary
# | n_intervals ulong 8bytes == how many intervals are sent
# | for this gtid
# | | start ulong 8bytes Start position of this interval
# | | stop ulong 8bytes Stop position of this interval
# A gtid set looks like:
# 19d69c1e-ae97-4b8c-a1ef-9e12ba966457:1-3:8-10,
# 1c2aad49-ae92-409a-b4df-d05a03e4702e:42-47:80-100:130-140
#
# In this particular gtid set,
# 19d69c1e-ae97-4b8c-a1ef-9e12ba966457:1-3:8-10
# is the first member of the set, it is called a gtid.
# In this gtid, 19d69c1e-ae97-4b8c-a1ef-9e12ba966457 is the sid
# and have two intervals, 1-3 and 8-10, 1 is the start position of
#.........这里部分代码省略.........
开发者ID:noplay，项目名称:python-mysql-replication，代码行数:101，代码来源:binlogstream.py
示例19: _read_table_id
def _read_table_id(self):
# Table ID is 6 byte
# pad little-endian number
table_id = self.packet.read(6) + int2byte(0) + int2byte(0)
return struct.unpack('<Q', table_id)[0]
开发者ID:AaronLaw，项目名称:python-mysql-replication，代码行数:5，代码来源:event.py
示例20: test_datatypes
def test_datatypes(self):
""" test every data type """
conn = self.connections[0]
c = yield from conn.cursor()
yield from c.execute(
"create table test_datatypes (b bit, i int, l bigint, f real, s "
"varchar(32), u varchar(32), bb blob, d date, dt datetime, "
"ts timestamp, td time, t time, st datetime)")
try:
# insert values
v = (
True, -3, 123456789012, 5.7, "hello'\" world",
u"Espa\xc3\xb1ol",
"binary\x00data".encode(conn.charset),
datetime.date(1988, 2, 2),
datetime.datetime.now().replace(microsecond=0),
datetime.timedelta(5, 6), datetime.time(16, 32),
time.localtime())
yield from c.execute(
"insert into test_datatypes (b,i,l,f,s,u,bb,d,dt,td,t,st) "
"values (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)",
v)
yield from c.execute(
"select b,i,l,f,s,u,bb,d,dt,td,t,st from test_datatypes")
r = yield from c.fetchone()
self.assertEqual(util.int2byte(1), r[0])
# self.assertEqual(v[1:8], r[1:8])
self.assertEqual(v[1:9], r[1:9])
# mysql throws away microseconds so we need to check datetimes
# specially. additionally times are turned into timedeltas.
# self.assertEqual(datetime.datetime(*v[8].timetuple()[:6]), r[8])
self.assertEqual(v[9], r[9]) # just timedeltas
self.assertEqual(
datetime.timedelta(0, 60 * (v[10].hour * 60 + v[10].minute)),
r[10])
self.assertEqual(datetime.datetime(*v[-1][:6]), r[-1])
yield from c.execute("delete from test_datatypes")
# check nulls
yield from c.execute(
"insert into test_datatypes (b,i,l,f,s,u,bb,d,dt,td,t,st) "
"values (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)",
[None] * 12)
yield from c.execute(
"select b,i,l,f,s,u,bb,d,dt,td,t,st from test_datatypes")
r = yield from c.fetchone()
self.assertEqual(tuple([None] * 12), r)
yield from c.execute("delete from test_datatypes")
# check sequence type
yield from c.execute(
"insert into test_datatypes (i, l) values (2,4), (6,8), "
"(10,12)")
yield from c.execute(
"select l from test_datatypes where i in %s order by i",
((2, 6),))
r = yield from c.fetchall()
self.assertEqual(((4,), (8,)), r)
finally:
yield from c.execute("drop table test_datatypes")
开发者ID:Magdno1，项目名称:Arianrhod，代码行数:62，代码来源:test_basic.py
注：本文中的pymysql.util.int2byte函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。 |
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