"""

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.

  Last edited by:  $Author$

              on:  $DateTime$

        Revision:  $Revision$

              Id:  $Id$

          Author:  Chris Wolf

"""

import sys

import socket

import optparse

#import pdb

def enforce_ascii(a):

    if isinstance(a, str) or isinstance(a, unicode):

        # return a.encode('ascii', 'replace')

        r = ""

        for i in a:

            if ord(i) >= 128:

                r += "?"

            else:

                r += i

        return r

    else:

        return a

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_SERVER_ID     = "Whois Server:"

    WHOIS_ORG_SERVER_ID = "Registrant Street1:Whois Server:"

    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):

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

        whois server for getting contact details.

        """

        #print 'finding whois server'

        #print 'parameters:', buf, 'hostname', hostname

        nhost = None

        parts_index = 1

        start = buf.find(NICClient.WHOIS_SERVER_ID)

        #print 'start', start

        if (start == -1):

            start = buf.find(NICClient.WHOIS_ORG_SERVER_ID)

            parts_index = 2

        if (start > -1):  

            end = buf[start:].find('\n')

            #print 'end:', end

            whois_line = buf[start:end+start]

            #print 'whois_line', whois_line

            nhost = whois_line.split(NICClient.WHOIS_SERVER_ID+' ').pop()

            nhost = nhost.split('http://').pop()

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

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

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

                nhost = None

            #print 'nhost:',nhost

        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):

        """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

        """

        #print 'Performing the whois'

        #print 'parameters given:', query, hostname, flags

        #pdb.set_trace()

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

        s.connect((hostname, 43))

        """send takes bytes as an input

        """

        queryBytes = None

        if (hostname == NICClient.DENICHOST):

            #print 'the domain is in NIC DENIC'

            queryBytes = ("-T dn,ace -C UTF-8 " + query + "\r\n").encode()

            #print 'queryBytes:', queryBytes

        else:

            queryBytes = (query  + "\r\n").encode()        

        s.send(queryBytes)

        """recv returns bytes

        """

        #print s

        response = b''

        while True:

            d = s.recv(4096)

            response += d

            if not d:

                break

        s.close()

        #pdb.set_trace()

        nhost = None

        #print 'response', response

        response = enforce_ascii(response)

        if (flags & NICClient.WHOIS_RECURSE and nhost == None):

            #print 'Inside first if'

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

            #print 'nhost is:', nhost

        if (nhost != None):

            #print 'inside second if'

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

            #print 'response', response

        #print 'returning whois response'

        return response.decode()

    def choose_server(self, domain):

        """Choose initial lookup NIC host"""

        if (domain.endswith("-NORID")):

            return NICClient.NORIDHOST

        pos = domain.rfind('.')

        if (pos == -1):

            return None

        tld = domain[pos+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"""

        #print 'whois_lookup'

        nichost = None

        #pdb.set_trace()

        # this would be the case when this function is called by other than main

        if (options == None):                    

            options = {}

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

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

            result = self.whois(query_arg, options['country'] + NICClient.QNICHOST_TAIL, flags)

        elif (self.use_qnichost):

            nichost = self.choose_server(query_arg)

            if (nichost != None):

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

        else:

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

        #print 'whois_lookup finished'

        return result

#---- END OF NICClient class def ---------------------

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 is True):

        flags = flags|NICClient.WHOIS_QUICK

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