"""

Whois client for python

transliteration of:

http://www.opensource.apple.com/source/adv_cmds/adv_cmds-138.1/whois/whois.c

Copyright (c) 2010 Chris Wolf

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

"""

from __future__ import print_function

from __future__ import unicode_literals

from __future__ import division

from __future__ import absolute_import

from future import standard_library

standard_library.install_aliases()

from builtins import *

from builtins import object

import re

import sys

import socket

import optparse

class NICClient(object):

    ABUSEHOST = "whois.abuse.net"

    NICHOST = "whois.crsnic.net"

    INICHOST = "whois.networksolutions.com"

    DNICHOST = "whois.nic.mil"

    GNICHOST = "whois.nic.gov"

    ANICHOST = "whois.arin.net"

    LNICHOST = "whois.lacnic.net"

    RNICHOST = "whois.ripe.net"

    PNICHOST = "whois.apnic.net"

    MNICHOST = "whois.ra.net"

    QNICHOST_TAIL = ".whois-servers.net"

    SNICHOST = "whois.6bone.net"

    BNICHOST = "whois.registro.br"

    NORIDHOST = "whois.norid.no"

    IANAHOST = "whois.iana.org"

    DENICHOST = "de.whois-servers.net"

    DEFAULT_PORT = "nicname"

    WHOIS_RECURSE = 0x01

    WHOIS_QUICK = 0x02

    ip_whois = [LNICHOST, RNICHOST, PNICHOST, BNICHOST]

    def __init__(self):

        self.use_qnichost = False

    def findwhois_server(self, buf, hostname, query):

        """Search the initial TLD lookup results for the regional-specifc

        whois server for getting contact details.

        """

        nhost = None

        match = re.compile('Domain Name: ' + query + '\s*.*?Whois Server: (.*?)\s', flags=re.IGNORECASE|re.DOTALL).search(buf)

        if match:

            nhost = match.groups()[0]

            # if the whois address is domain.tld/something then

            # s.connect((hostname, 43)) does not work

            if nhost.count('/') > 0:

                nhost = None

        elif hostname == NICClient.ANICHOST:

            for nichost in NICClient.ip_whois:

                if buf.find(nichost) != -1:

                    nhost = nichost

                    break

        return nhost

    def whois(self, query, hostname, flags, many_results=False):

        """Perform initial lookup with TLD whois server

        then, if the quick flag is false, search that result

        for the region-specifc whois server and do a lookup

        there for contact details

        """

        response = b''

        try:

            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

            s.settimeout(10)

            s.connect((hostname, 43))

            try:

                query = query.decode('utf-8')

            except UnicodeEncodeError:

                pass  # Already Unicode (python2's error)

            except AttributeError:

                pass  # Already Unicode (python3's error)

            if hostname == NICClient.DENICHOST:

                query_bytes = "-T dn,ace -C UTF-8 " + query

            elif hostname.endswith(NICClient.QNICHOST_TAIL) and many_results:

                query_bytes = '=' + query

            else:

                query_bytes = query

            # recv returns bytes

            while True:

                d = s.recv(4096)

                response += d

                if not d:

                    break

            s.close()

        except socket.error as socketerror:

            print('Socket Error:', socketerror)

        nhost = None

        response = response.decode('utf-8', errors='replace')

        if 'with "=xxx"' in response:

            return self.whois(query, hostname, flags, True)

        if flags & NICClient.WHOIS_RECURSE and nhost is None:

            nhost = self.findwhois_server(response, hostname, query)

        if nhost is not None:

            response += self.whois(query, nhost, 0)

        return response

    def choose_server(self, domain):

        """Choose initial lookup NIC host"""

        try:

            domain = domain.encode('idna').decode('utf-8')

        except TypeError:

            domain = domain.decode('utf-8').encode('idna').decode('utf-8')

        if domain.endswith("-NORID"):

            return NICClient.NORIDHOST

        domain = domain.split('.')

        if len(domain) < 2:

            return None

        tld = domain[-1]

        if tld[0].isdigit():

            return NICClient.ANICHOST

        return tld + NICClient.QNICHOST_TAIL

    def whois_lookup(self, options, query_arg, flags):

        """Main entry point: Perform initial lookup on TLD whois server,

        or other server to get region-specific whois server, then if quick

        flag is false, perform a second lookup on the region-specific

        server for contact records"""

        nichost = None

        # whoud happen when this function is called by other than main

        if options is None:

            options = {}

        if ('whoishost' not in options or options['whoishost'] is None) \

                and ('country' not in options or options['country'] is None):

            self.use_qnichost = True

            options['whoishost'] = NICClient.NICHOST

            if not (flags & NICClient.WHOIS_QUICK):

                flags |= NICClient.WHOIS_RECURSE

        if 'country' in options and options['country'] is not None:

            result = self.whois(

                query_arg,

                options['country'] + NICClient.QNICHOST_TAIL,

                flags

            )

        elif self.use_qnichost:

            nichost = self.choose_server(query_arg)

            if nichost is not None:

                result = self.whois(query_arg, nichost, flags)

            else:

                result = ''

        else:

            result = self.whois(query_arg, options['whoishost'], flags)

        return result

def parse_command_line(argv):

    """Options handling mostly follows the UNIX whois(1) man page, except

    long-form options can also be used.

    """

    flags = 0

    usage = "usage: %prog [options] name"

    parser = optparse.OptionParser(add_help_option=False, usage=usage)

    parser.add_option("-a", "--arin", action="store_const",

                      const=NICClient.ANICHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.ANICHOST)

    parser.add_option("-A", "--apnic", action="store_const",

                      const=NICClient.PNICHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.PNICHOST)

    parser.add_option("-b", "--abuse", action="store_const",

                      const=NICClient.ABUSEHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.ABUSEHOST)

    parser.add_option("-c", "--country", action="store",

                      type="string", dest="country",

                      help="Lookup using country-specific NIC")

    parser.add_option("-d", "--mil", action="store_const",

                      const=NICClient.DNICHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.DNICHOST)

    parser.add_option("-g", "--gov", action="store_const",

                      const=NICClient.GNICHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.GNICHOST)

    parser.add_option("-h", "--host", action="store",

                      type="string", dest="whoishost",

                      help="Lookup using specified whois host")

    parser.add_option("-i", "--nws", action="store_const",

                      const=NICClient.INICHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.INICHOST)

    parser.add_option("-I", "--iana", action="store_const",

                      const=NICClient.IANAHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.IANAHOST)

    parser.add_option("-l", "--lcanic", action="store_const",

                      const=NICClient.LNICHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.LNICHOST)

    parser.add_option("-m", "--ra", action="store_const",

                      const=NICClient.MNICHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.MNICHOST)

    parser.add_option("-p", "--port", action="store",

                      type="int", dest="port",

                      help="Lookup using specified tcp port")

    parser.add_option("-Q", "--quick", action="store_true",

                      dest="b_quicklookup",

                      help="Perform quick lookup")

    parser.add_option("-r", "--ripe", action="store_const",

                      const=NICClient.RNICHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.RNICHOST)

    parser.add_option("-R", "--ru", action="store_const",

                      const="ru", dest="country",

                      help="Lookup Russian NIC")

    parser.add_option("-6", "--6bone", action="store_const",

                      const=NICClient.SNICHOST, dest="whoishost",

                      help="Lookup using host " + NICClient.SNICHOST)

    parser.add_option("-?", "--help", action="help")

    return parser.parse_args(argv)

if __name__ == "__main__":

    flags = 0

    nic_client = NICClient()

    options, args = parse_command_line(sys.argv)

    if options.b_quicklookup:

        flags = flags | NICClient.WHOIS_QUICK

    print(nic_client.whois_lookup(options.__dict__, args[1], flags))