simple_echo_client.py

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#!/usr/bin/env python

from socket import *
import sys
import argparse
import struct
parser = argparse.ArgumentParser(description='Simple socket client')
parser.add_argument("--port", default=8080, type=int)
parser.add_argument("--udp", action="store_true")
parser.add_argument("--ip", default="127.0.0.1")
args = parser.parse_args()

print "connecting to ", (args.ip, args.port)

if not args.udp:
    server = socket(AF_INET, SOCK_STREAM)
    server.connect((args.ip, args.port))
else:
    server = socket(AF_INET, SOCK_DGRAM)
    while True:
        data = raw_input('> ')
        if not data:
            break
        packer = struct.Struct("!%ds" % len(data))
        data = packer.pack(data)
        print "sending", packer.size * 8, "bits"
        if not args.udp:
            server.send(data)
        else:
            server.sendto(data, (args.ip, args.port))
        if not data:
            break
        print data
    server.close()