whois_cli

This repo is made available under MIT license (see LICENSE).

whois_cli.py was tested in a Unix-like terminal emulator running Bash in Ubuntu 18.04.

pip was used for package management.

requirements.txt

Note:

1. since specific Python libraries may be used system-wide in Ubuntu—to be safe—a virtual environment is required.
2. if Ubuntu is using pip and pip2 for Python 2 package management, then pip3 will be the required package manager.

To install required dependencies:

$ pip install -r requirements.txt

dnspython==1.16.0
ipwhois==1.1.0

The sys.argv method will also be imported.

from ipwhois import IPWhois
from sys import argv

whois_cli.py

IPWhois(argv[1]).lookup_rdap()

ipwhois.IPWhois : is the base class for wrapping whois lookups.

sys.argv[1] : gets first command line argument passed to whois_cli.py or the IPv4 number.

IPWhois.lookup_rdap() : became the recommended lookup method, since RDAP provides more efficient, higher quality whois data.

_objs = w["objects"] : indicates that the objects dictionary within the whois data will be stored in the objs variable.

_asn = {
    "asn": "ASN",
    "asn_cidr": "CIDR",
    "asn_country_code": "Country code",
    "asn_date": "Date",
    "asn_description": "Description",
    "asn_registry": "Registry"
}

The dictionary above contains ASN keys with their associated values for capitalized string syntax.

try:
    for k, v in net_remarks.items():
        print(f'{cyan}{v}{end}: {_net["remarks"][0][k]}')
except TypeError:
    print(f'{cyan}{v}{end}: n/a')

In the for loop above, a try/except block was used to handle None returns. n/a strings replace None returns.

Color Formatting

red = "\x1b[0;31m"
cyan = "\x1b[0;36m"
end = "\x1b[0m"

Parts of color formatting syntax for text display in the terminal emulator were stored in variables (see above).

print(f'{cyan}{v}{end}: {_net["remarks"][0][k]}')

{cyan}{v}{end} demonstrates the use of f-string expressions to format text colors.