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Python script to fetch public IPv4 DNS servers with high reliability #96

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Jan 11, 2021
Merged

Python script to fetch public IPv4 DNS servers with high reliability #96

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25 changes: 25 additions & 0 deletions scripts/get-resolvers.py
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Original file line number Diff line number Diff line change
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#!/usr/bin/env python3

import os
import requests
import validators
import json

NAMESERVERS_URL='https://public-dns.info/nameserver/nameservers.json'
OUTPUT_FILE=os.path.dirname(os.path.realpath(__file__)) + "/../lists/public-dns.txt"
MIN_RELIABILIY=0.99

try:

# Try to open output file for writing
with open(OUTPUT_FILE, 'w') as f:
# Fetch public servers
r = requests.get(NAMESERVERS_URL)
for ip in json.loads(r.text):
# Only focus on reliable ipv4 addresses
if validators.ipv4(ip['ip']) and ip['reliability'] > MIN_RELIABILIY:
# Write results
f.write("%s\n" % ip['ip'])

except Exception as e:
print("Error.")