mirror of https://github.com/apache/kafka.git
68 lines
2.3 KiB
Python
68 lines
2.3 KiB
Python
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# Copyright 2010 LinkedIn
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import socket
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import struct
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import binascii
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import sys
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PRODUCE_REQUEST_ID = 0
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def encode_message(message):
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# <MAGIC_BYTE: char> <CRC32: int> <PAYLOAD: bytes>
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return struct.pack('>B', 0) + \
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struct.pack('>i', binascii.crc32(message)) + \
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message
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def encode_produce_request(topic, partition, messages):
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# encode messages as <LEN: int><MESSAGE_BYTES>
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encoded = [encode_message(message) for message in messages]
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message_set = ''.join([struct.pack('>i', len(m)) + m for m in encoded])
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# create the request as <REQUEST_SIZE: int> <REQUEST_ID: short> <TOPIC: bytes> <PARTITION: int> <BUFFER_SIZE: int> <BUFFER: bytes>
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data = struct.pack('>H', PRODUCE_REQUEST_ID) + \
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struct.pack('>H', len(topic)) + topic + \
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struct.pack('>i', partition) + \
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struct.pack('>i', len(message_set)) + message_set
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return struct.pack('>i', len(data)) + data
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class KafkaProducer:
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def __init__(self, host, port):
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self.REQUEST_KEY = 0
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self.connection = socket.socket()
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self.connection.connect((host, port))
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def close(self):
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self.connection.close()
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def send(self, messages, topic, partition = 0):
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self.connection.sendall(encode_produce_request(topic, partition, messages))
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if __name__ == '__main__':
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if len(sys.argv) < 4:
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print >> sys.stderr, 'USAGE: python', sys.argv[0], 'host port topic'
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sys.exit(1)
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host = sys.argv[1]
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port = int(sys.argv[2])
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topic = sys.argv[3]
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producer = KafkaProducer(host, port)
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while True:
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print 'Enter comma seperated messages: ',
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line = sys.stdin.readline()
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messages = line.split(',')
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producer.send(messages, topic)
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print 'Sent', len(messages), 'messages successfully'
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