import sys ; sys.path.insert(0, '..')
import binascii
import DNS

# Usage : python dnsTorrentToFileTorrent.py dnstorrentstring outfilename
# Example : python dnsTorrentToFileTorrent.py 0_1197_56633ab0d90f43c68ed1b47358eccfe7.netrogenic.com yarrow-binary-i386-iso.torrent

def main():
  parts = sys.argv[1].split('_')
  o = ""
  for i in range(0,int(parts[1])+1):
    print "Downloading "+str(i)+"_"+parts[1]+"_"+parts[2]
    o+=lookup(str(i)+"_"+parts[1]+"_"+parts[2])

  out = binascii.a2b_hex(o)
  f=open(sys.argv[2],'wb')
  f.write(out)
  f.close()

def lookup(name):
  DNS.ParseResolvConf()
  a = DNS.DnsRequest(name, qtype = 'txt').req().answers
  l = map(lambda x:x['data'],a)
  return l[0][0]




if __name__ == "__main__":
    main()