cpython/Demo/sockets/finger.py

#! /usr/bin/env python3

# Python interface to the Internet finger daemon.
#
# Usage: finger [options] [user][@host] ...
#
# If no host is given, the finger daemon on the local host is contacted.
# Options are passed uninterpreted to the finger daemon!


import sys, string
from socket import *


# Hardcode the number of the finger port here.
# It's not likely to change soon...
#
FINGER_PORT = 79


# Function to do one remote finger invocation.
# Output goes directly to stdout (although this can be changed).
#
def finger(host, args):
    s = socket(AF_INET, SOCK_STREAM)
    s.connect((host, FINGER_PORT))
    s.send(args + '\n')
    while 1:
        buf = s.recv(1024)
        if not buf: break
        sys.stdout.write(buf)
    sys.stdout.flush()


# Main function: argument parsing.
#
def main():
    options = ''
    i = 1
    while i < len(sys.argv) and sys.argv[i][:1] == '-':
        options = options + sys.argv[i] + ' '
        i = i+1
    args = sys.argv[i:]
    if not args:
        args = ['']
    for arg in args:
        if '@' in arg:
            at = string.index(arg, '@')
            host = arg[at+1:]
            arg = arg[:at]
        else:
            host = ''
        finger(host, options + arg)


# Call the main function.
#
main()