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import sys, os | |
from twisted.python.runtime import platform | |
from twisted.python import log | |
from twisted.names import root, resolve, cache, client | |
from twisted.internet import utils | |
def parseIpconfigDNSServers(output): | |
servers = [] | |
found = False | |
for line in output.split('\n'): | |
if 'DNS Servers . . . . . . . . . . . :' in line or (found and not '. . . .' in line): | |
servers.append(line[38:].strip()) | |
found = True | |
else: | |
found = False | |
log.msg( 'Windows: Detected DNS servers %s' % (str(servers))) | |
return servers | |
def patchWindowsDNS(): | |
if platform.getType() != 'posix': | |
d = utils.getProcessOutput(os.path.join(os.environ['WINDIR'], 'system32', 'ipconfig.exe'), ["/all"]) | |
d.addCallback(parseIpconfigDNSServers) | |
d.addCallback(lambda r: client.Resolver(servers=[(h, 53) for h in r])) | |
d.addErrback(log.msg) | |
theResolver = root.DeferredResolver(d) | |
client.theResolver = resolve.ResolverChain([cache.CacheResolver(), theResolver]) | |
if __name__ == '__main__': | |
log.startLogging(sys.stdout) | |
def do_lookup(domain): | |
d = client.getHostByName(domain) | |
d.addBoth(log.msg) | |
patchWindowsDNS() | |
from twisted.internet import reactor | |
reactor.callLater(0, do_lookup, 'example.com') | |
reactor.run() |
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