7d7d8a0560
Printing all output as raw bytes allows MaxScale to control the formatting process. This also removes the need to convert the bytes to Python strings and the need to parse the JSON.
75 lines
2.7 KiB
Python
Executable File
75 lines
2.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2016 MariaDB Corporation Ab
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#
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# Use of this software is governed by the Business Source License included
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# in the LICENSE.TXT file and at www.mariadb.com/bsl.
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#
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# Change Date: 2019-01-01
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#
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# On the date above, in accordance with the Business Source License, use
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# of this software will be governed by version 2 or later of the General
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# Public License.
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import time
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import sys
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import socket
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import hashlib
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import argparse
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import selectors
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import binascii
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import os
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def read_data():
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sel = selectors.DefaultSelector()
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sel.register(sock, selectors.EVENT_READ)
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while True:
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try:
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events = sel.select(timeout=int(opts.read_timeout) if int(opts.read_timeout) > 0 else None)
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buf = sock.recv(4096, socket.MSG_DONTWAIT)
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if len(buf) > 0:
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os.write(sys.stdout.fileno(), buf)
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sys.stdout.flush()
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else:
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raise Exception('Socket was closed')
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except BlockingIOError:
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break
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except Exception as ex:
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print(ex, file=sys.stderr)
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break
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parser = argparse.ArgumentParser(description = "CDC Binary consumer", conflict_handler="resolve")
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parser.add_argument("-h", "--host", dest="host", help="Network address where the connection is made", default="localhost")
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parser.add_argument("-P", "--port", dest="port", help="Port where the connection is made", default="4001")
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parser.add_argument("-u", "--user", dest="user", help="Username used when connecting", default="")
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parser.add_argument("-p", "--password", dest="password", help="Password used when connecting", default="")
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parser.add_argument("-f", "--format", dest="format", help="Data transmission format", default="JSON", choices=["AVRO", "JSON"])
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parser.add_argument("-t", "--timeout", dest="read_timeout", help="Read timeout", default=0)
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parser.add_argument("FILE", help="Requested table name in the following format: DATABASE.TABLE[.VERSION]")
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parser.add_argument("GTID", help="Requested GTID position", default=None, nargs='?')
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opts = parser.parse_args(sys.argv[1:])
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sock = socket.create_connection([opts.host, opts.port])
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# Authentication
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auth_string = binascii.b2a_hex((opts.user + ":").encode())
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auth_string += bytes(hashlib.sha1(opts.password.encode("utf_8")).hexdigest().encode())
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sock.send(auth_string)
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# Discard the response
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response = str(sock.recv(1024)).encode('utf_8')
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# Register as a client as request Avro format data
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sock.send(bytes(("REGISTER UUID=XXX-YYY_YYY, TYPE=" + opts.format).encode()))
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# Discard the response again
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response = str(sock.recv(1024)).encode('utf_8')
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# Request a data stream
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sock.send(bytes(("REQUEST-DATA " + opts.FILE + (" " + opts.GTID if opts.GTID else "")).encode()))
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read_data()
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