需安装dnspython第三方库，可pip install dnspython
from dns import resolver
class QueryDNSResolver:
"""DNS解析，A类、MX、NS、CNAME"""
def __init__(self):
pass
def A_query(self, domain):
try:
A_items = resolver.query(domain, 'A')
for i in A_items.response.answer:
for j in i.items:
print(j.address)
except resolver.NoAnswer as e:
print(e)
def MX_query(self, domain):
try:
MX_items = resolver.query(domain, 'MX')
for i in MX_items:
print('MX preference =', i.preference, 'main exchanger =', i.exchange)
except resolver.NoAnswer as e:
print(e)
def NS_query(self, domain):
try:
self.__Base_query(domain, 'NS')
except resolver.NoAnswer as e:
print(e)
'''
NS_items = resolver.query(domain, 'NS')
for i in NS_items.response.answer:
for j in i.items:
print(j.to_next())
'''
def CNAME_query(self, domain):
try:
self.__Base_query(domain, 'CNAME')
except resolver.NoAnswer as e:
print(e)
'''
CNAME_items = resolver.query(domain, 'CNAME')
for i in CNAME_items.response.answer:
for j in i.items:
print(j.to_next())
'''
def __Base_query(self, domain, queryMode):
try:
items = resolver.query(domain, queryMode)
for i in items.response.answer:
for j in i.items:
print(j.to_text())
except resolver.NoAnswer as e:
print(e)
def ALL_query(self, domain):
self.__print_info('A')
self.A_query(domain)
self.__print_info('MX')
self.MX_query(domain)
self.__print_info('NS')
self.NS_query(domain)
self.__print_info('CNAME')
self.CNAME_query(domain)
def __print_info(self, queryMode):
print('====%s====\n' % str(queryMode))
def main():
query_ob = QueryDNSResolver()
domain = input('Enter an domain:')
query_ob.ALL_query(domain)
if __name__ == '__main__':
main()
