| ''' |
| A simple command line interface to send/receive bytes over TCP. |
| ''' |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import argparse |
| import socket |
| import sys |
| import time |
| |
| def tcp_client(host, port, data, closeDelaySeconds=0): |
| s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) |
| s.connect((host, port)) |
| s.sendall(data.encode()) |
| if closeDelaySeconds > 0: |
| time.sleep(closeDelaySeconds) |
| s.shutdown(socket.SHUT_WR) |
| while True: |
| output = s.recv(4096) # suggested bufsize from docs.python.org |
| if len(output) <= 0: |
| break |
| else: |
| sys.stdout.write(output.decode()) |
| s.close() |
| |
| |
| DESCRIPTION =\ |
| """ |
| A simple command line interface to send/receive bytes over TCP. |
| |
| The full contents of the given file are sent via a TCP connection to the given |
| host and port. Then data is read from the connection and printed to standard |
| output. Streaming is not supported. |
| |
| If a delay is specified, the client will pause before closing the connections |
| to further writes. This is useful to simulate the sending of partial data. |
| """ |
| |
| |
| def main(argv): |
| parser = argparse.ArgumentParser(description=DESCRIPTION,\ |
| formatter_class=argparse.RawDescriptionHelpFormatter) |
| parser.add_argument('host', help='the target host') |
| parser.add_argument('port', type=int, help='the target port') |
| parser.add_argument('file', help='the file with content to be sent') |
| parser.add_argument('--delay-after-send', metavar='SECONDS', type=int, help='after send, delay in seconds before half-close', default=0 ) |
| args = parser.parse_args() |
| |
| data = '' |
| with open(args.file, 'r') as f: |
| data = f.read() |
| tcp_client(args.host, args.port, data, args.delay_after_send) |
| |
| |
| if __name__ == "__main__": |
| main(sys.argv) |