Subsort - The Subdomain Redundancies Sorter.

This program removes subdomain redundancies and returns an optimized list. It saves A LOT of time when parsing large subdomain/dns files with grep.

Why?

Because it can save you A LOT of time in some situations.

Suppose you have a 30 Gigabytes .json file full of DNS entries. If you grep for the lines containing the domain "example.com", next you don't need to parse for "sub.example.com" as the results of the latter will be contained in the results of the former.

So what does it do, exactly?

You provide a .txt file containing domains and subdomains and this program removes the subdomain redundancies, returning an optimized list, which can later be used by another tool such as grep.

So if you provide a .txt file as argument containing:

example.com
sub.example.com
another.example.com
test.com
sub.test.com
anothertest.com

Then, the application would return:

example.com
test.com
anothertest.com

How to Run

Execute on your terminal:

python subsort.py -f subdomains_file.txt

Or you can also import it to your program:

import subsort

subds_list = [
    'example.com',
    'sub.example.com',
    'sub2.example.com',
    'test.com',
    'sub.test.com',
    'anothertest.com',
]

new_list = []
new_list.extend(subsort.del_list_subds_redund(subds_list))

print(new_list)

Requirements

Python 2.7 or higher