def remove(address_to_remove=None,
names_to_remove=None,
remove_from_path=None):
"""Remove entries from a hosts file
:param address_to_remove: An ipv4 or ipv6 address to remove
:param names_to_remove: A list of names to remove
:param remove_from_path: The path of the hosts file to remove entries from
:return: A dict containing the result and user message to output
"""
hosts = Hosts(path=remove_from_path)
if address_to_remove or names_to_remove:
num_before = hosts.count()
hosts.remove_all_matching(address=address_to_remove,
name=names_to_remove)
hosts.write()
difference = num_before - hosts.count()
if difference:
if difference > 1:
str_entry = 'entries'
else:
str_entry = 'entry'
return {
'result': 'success',
'message': 'Removed {0} {1}'.format(difference, str_entry)
}
else:
return {'result': 'failed', 'message': 'No matching entries found'}
def updateHostsConfigFile(newEntriesList):
""" write the latest IP address for the hosts to the system config file """
my_hosts = Hosts()
print("Locate the hosts config from : ", my_hosts.determine_hosts_path())
print("Host config entries number : ", my_hosts.count())
#step 1, remove all the entries with the same name
for entry in newEntriesList:
my_hosts.remove_all_matching(name=entry['Host'])
#step 2, add the entry from the new entry list
for entry in newEntriesList:
new_entry = HostsEntry(entry_type='ipv4',
address=entry['Ip'],
names=[entry['Host']])
ret = my_hosts.add(
[new_entry],
allow_address_duplication=True,
)
#print(f"Add ipv4 entry for: {new_entry}\n\tOperation result : {ret}\n")
#step 3, write the host file
result = my_hosts.write()
if (result is not None):
print("Done! new host file saved! result : \n")
print('\n'.join(f'{k} : {v}' for k, v in sorted(result.items())))
else:
print("Error! update host file failed! \n")
def checkHostsLatency(hostname_keyword=None):
""" Read host and IP from system hosts config file, Ping the specific host IP to check the average latency in ms """
my_hosts = Hosts()
print(my_hosts.determine_hosts_path())
print("Host config entries : ", my_hosts.count())
entry = 0
for host in my_hosts.entries:
if (host.entry_type == "ipv4"):
if (hostname_keyword is None): # by default print all entries
print(host)
else: # print entries with keyword
hostString = "".join(host.names)
hostString = hostString.strip().lower()
if (hostname_keyword.strip().lower() in hostString):
ipaddr = host.address
latency = ping(ipaddr, size=1000, verbose=False).rtt_avg_ms
print(entry, f" Latency {latency:<7.2f}ms ", host)
entry += 1
if (entry == 0):
print(hostname_keyword, " Not found in the host file!\n")