testproto.py: use argparse module to parse command line arguments, full PEP8 compliance
This commit is contained in:
Sebastien Helleu
parent
0e4ce9c967
commit
1cf51dd211
@ -21,185 +21,219 @@
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# along with QWeeChat. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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# Usage: python testproto.py [-h] [-v] [-6] <hostname> <port>
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#
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# With initial commands: echo "init password=xxxx" | python testproto.py localhost 5000
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# python testproto.py localhost 5000 < commands.txt
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#
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# Return code:
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# 0: OK
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# 1: missing/invalid arguments (hostname or port)
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# 2: connection to WeeChat/relay failed
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# 3: I/O error with WeeChat/relay
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#
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from __future__ import print_function
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import argparse
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import os
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import select
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import shlex
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import socket
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import struct
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import sys
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import time
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import traceback
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import os, sys, socket, select, struct, time
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import protocol # WeeChat/relay protocol
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options = { 'h': 0, 'v': 0, '6': 0 }
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hostname = None
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port = None
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def usage():
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"""Display usage."""
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print('\nSyntax: python %s [-h] [-v] [-6] <hostname> <port>\n' % sys.argv[0])
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print(' -h display this help')
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print(' -v verbose mode: long objects view (two -v: display raw messages)')
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print(' -6 connect using IPv6')
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print(' hostname, port hostname (or IP address) and port of machine running WeeChat relay')
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print('')
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print('Some commands can be piped to the script, for example:')
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print(' echo "init password=xxxx" | python %s localhost 5000' % sys.argv[0])
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print(' python %s localhost 5000 < commands.txt' % sys.argv[0])
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print('')
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class TestProto:
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def connect(address, ipv6):
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"""Connect to WeeChat/relay."""
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inet = socket.AF_INET6 if ipv6 else socket.AF_INET
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sock = None
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try:
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sock = socket.socket(inet, socket.SOCK_STREAM)
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sock.connect(address)
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except:
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if sock:
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sock.close()
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print('Failed to connect to %s/%d using %s' % (address[0], address[1],
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'IPv4' if inet == socket.AF_INET else 'IPv6'))
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return (None, None)
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print('Connected to %s/%d (%s)' % (hostname, port,
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'IPv4' if inet == socket.AF_INET else 'IPv6'))
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return (sock, inet)
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def __init__(self, args):
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self.args = args
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self.sock = None
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self.has_quit = False
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self.address = '{self.args.hostname}/{self.args.port} ' \
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'(IPv{0})'.format(6 if self.args.ipv6 else 4, self=self)
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def send(sock, messages):
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"""Send a text message to WeeChat/relay."""
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has_quit = False
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try:
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for msg in messages.split('\n'):
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if msg == 'quit':
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has_quit = True
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sock.sendall(msg + '\n')
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print('\x1b[33m<-- %s\x1b[0m' % msg)
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except:
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print('Failed to send message')
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return (False, has_quit)
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return (True, has_quit)
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def connect(self):
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"""
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Connect to WeeChat/relay.
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Return True if OK, False if error.
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"""
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inet = socket.AF_INET6 if self.args.ipv6 else socket.AF_INET
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try:
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self.sock = socket.socket(inet, socket.SOCK_STREAM)
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self.sock.connect((self.args.hostname, self.args.port))
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except:
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if self.sock:
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self.sock.close()
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print('Failed to connect to', self.address)
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return False
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print('Connected to', self.address)
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return True
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def decode(message):
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"""Decode a binary message received from WeeChat/relay."""
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global options
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try:
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proto = protocol.Protocol()
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message = proto.decode(message, separator='\n' if options['v'] else ', ')
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print('')
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if options['v'] >= 2 and message.uncompressed:
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# display raw message
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print('\x1b[32m--> message uncompressed (%d bytes):\n%s\x1b[0m'
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% (message.size_uncompressed,
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protocol.hex_and_ascii(message.uncompressed, 20)))
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# display decoded message
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print('\x1b[32m--> %s\x1b[0m' % message)
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except:
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print('Error while decoding message from WeeChat')
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return False
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return True
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def send(self, messages):
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"""
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Send a text message to WeeChat/relay.
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Return True if OK, False if error.
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"""
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try:
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for msg in messages.split('\n'):
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if msg == 'quit':
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self.has_quit = True
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self.sock.sendall(msg + '\n')
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print('\x1b[33m<-- ' + msg + '\x1b[0m')
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except:
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traceback.print_exc()
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print('Failed to send message')
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return False
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return True
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def mainloop(sock):
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"""Main loop: read keyboard, send commands, read socket and decode and display received binary messages."""
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message = ''
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recvbuf = ''
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prompt = '\x1b[36mrelay> \x1b[0m'
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sys.stdout.write(prompt)
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sys.stdout.flush()
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try:
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while True:
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inr, outr, exceptr = select.select([sys.stdin, sock], [], [], 1)
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for fd in inr:
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if fd == sys.stdin:
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buf = os.read(fd.fileno(), 4096)
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if buf:
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message += buf
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if '\n' in message:
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messages = message.split('\n')
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msgsent = '\n'.join(messages[:-1])
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if msgsent:
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(send_ok, has_quit) = send(sock, msgsent)
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if not send_ok:
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return 3
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if has_quit:
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return 0
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message = messages[-1]
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def decode(self, message):
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"""
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Decode a binary message received from WeeChat/relay.
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Return True if OK, False if error.
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"""
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try:
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proto = protocol.Protocol()
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msgd = proto.decode(message,
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separator='\n' if self.args.verbose > 0
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else ', ')
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print('')
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if self.args.verbose >= 2 and msgd.uncompressed:
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# display raw message
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print('\x1b[32m--> message uncompressed ({0} bytes):\n'
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'{1}\x1b[0m'
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''.format(msgd.size_uncompressed,
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protocol.hex_and_ascii(msgd.uncompressed, 20)))
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# display decoded message
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print('\x1b[32m--> {0}\x1b[0m'.format(msgd))
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except:
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traceback.print_exc()
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print('Error while decoding message from WeeChat')
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return False
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return True
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def send_stdin(self):
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"""
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Send commands from standard input if some data is available.
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Return True if OK (it's OK if stdin has no commands),
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False if error.
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"""
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inr, outr, exceptr = select.select([sys.stdin], [], [], 0)
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if inr:
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data = os.read(sys.stdin.fileno(), 4096)
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if data:
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if not test.send(data.strip()):
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#self.sock.close()
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return False
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# open stdin to read user commands
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sys.stdin = open('/dev/tty')
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return True
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def mainloop(self):
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"""
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Main loop: read keyboard, send commands, read socket,
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decode/display binary messages received from WeeChat/relay.
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Return 0 if OK, 4 if send error, 5 if decode error.
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"""
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if self.has_quit:
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return 0
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message = ''
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recvbuf = ''
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prompt = '\x1b[36mrelay> \x1b[0m'
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sys.stdout.write(prompt)
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sys.stdout.flush()
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try:
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while not self.has_quit:
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inr, outr, exceptr = select.select([sys.stdin, self.sock],
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[], [], 1)
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for fd in inr:
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if fd == sys.stdin:
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buf = os.read(fd.fileno(), 4096)
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if buf:
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message += buf
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if '\n' in message:
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messages = message.split('\n')
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msgsent = '\n'.join(messages[:-1])
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if msgsent and not self.send(msgsent):
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return 4
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message = messages[-1]
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sys.stdout.write(prompt + message)
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sys.stdout.flush()
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else:
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buf = fd.recv(4096)
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if buf:
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recvbuf += buf
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while len(recvbuf) >= 4:
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remainder = None
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length = struct.unpack('>i', recvbuf[0:4])[0]
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if len(recvbuf) < length:
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# partial message, just wait for the
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# end of message
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break
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# more than one message?
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if length < len(recvbuf):
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# save beginning of another message
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remainder = recvbuf[length:]
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recvbuf = recvbuf[0:length]
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if not self.decode(recvbuf):
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return 5
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if remainder:
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recvbuf = remainder
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else:
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recvbuf = ''
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sys.stdout.write(prompt + message)
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sys.stdout.flush()
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else:
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buf = fd.recv(4096)
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if buf:
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recvbuf += buf
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while len(recvbuf) >= 4:
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remainder = None
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length = struct.unpack('>i', recvbuf[0:4])[0]
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if len(recvbuf) < length:
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# partial message, just wait for end of message
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break
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# more than one message?
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if length < len(recvbuf):
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# save beginning of another message
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remainder = recvbuf[length:]
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recvbuf = recvbuf[0:length]
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if not decode(recvbuf):
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return 3
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if remainder:
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recvbuf = remainder
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else:
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recvbuf = ''
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sys.stdout.write(prompt + message)
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sys.stdout.flush()
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except:
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send(sock, 'quit')
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except:
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traceback.print_exc()
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self.send('quit')
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return 0
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# display help if arguments are missing
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if len(sys.argv) < 3:
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usage()
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sys.exit(1)
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def __del__(self):
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print('Closing connection with', self.address)
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time.sleep(0.5)
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self.sock.close()
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# read command line arguments
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try:
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for arg in sys.argv[1:]:
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if arg[0] == '-':
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for opt in arg[1:]:
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options[opt] = options.get(opt, 0) + 1
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elif hostname:
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port = int(arg)
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else:
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hostname = arg
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except:
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print('Invalid arguments')
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sys.exit(1)
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if options['h']:
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usage()
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sys.exit(0)
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if __name__ == "__main__":
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# parse command line arguments
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parser = argparse.ArgumentParser(
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formatter_class=argparse.RawDescriptionHelpFormatter,
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fromfile_prefix_chars='@',
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description='Command-line program for testing protocol WeeChat/relay.',
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epilog='''
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Environment variable "TESTPROTO_OPTIONS" can be set with default options.
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Argument "@file.txt" can be used to read default options in a file.
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# connect to WeeChat/relay
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(sock, inet) = connect((hostname, port), options['6'])
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if not sock:
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sys.exit(2)
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Some commands can be piped to the script, for example:
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echo "init password=xxxx" | python {0} localhost 5000
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python {0} localhost 5000 < commands.txt
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# send commands from standard input if some data is available
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has_quit = False
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inr, outr, exceptr = select.select([sys.stdin], [], [], 0)
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if inr:
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data = os.read(sys.stdin.fileno(), 4096)
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if data:
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(send_ok, has_quit) = send(sock, data.strip())
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if not send_ok:
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sock.close()
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sys.exit(3)
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# open stdin to read user commands
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sys.stdin = open('/dev/tty')
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The script returns:
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0: OK
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2: wrong arguments (command line)
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3: connection error
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4: send error (message sent to WeeChat)
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5: decode error (message received from WeeChat)
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'''.format(sys.argv[0]))
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parser.add_argument('-6', '--ipv6', action='store_true',
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help='connect using IPv6')
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parser.add_argument('-v', '--verbose', action='count', default=0,
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help='verbose mode: long objects view '
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'(-vv: display raw messages)')
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parser.add_argument('hostname',
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help='hostname (or IP address) of machine running '
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'WeeChat/relay')
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parser.add_argument('port', type=int,
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help='port of machine running WeeChat/relay')
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if len(sys.argv) == 1:
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parser.print_help()
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sys.exit(0)
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args = parser.parse_args(
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shlex.split(os.getenv('TESTPROTO_OPTIONS') or '') + sys.argv[1:])
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# main loop (wait commands, display messages received)
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if not has_quit:
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mainloop(sock)
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time.sleep(0.5)
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sock.close()
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test = TestProto(args)
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# connect to WeeChat/relay
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if not test.connect():
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sys.exit(3)
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# send commands from standard input if some data is available
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if not test.send_stdin():
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sys.exit(4)
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# main loop (wait commands, display messages received)
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rc = test.mainloop()
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del test
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sys.exit(rc)
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