def resolveHostName(
self,
resolutionReceiver,
hostName,
portNumber=0,
addressTypes=None,
transportSemantics="TCP",
):
"""
See L{IHostnameResolver.resolveHostName}
@param resolutionReceiver: see interface
@param hostName: see interface
@param portNumber: see interface
@param addressTypes: see interface
@param transportSemantics: see interface
@return: see interface
"""
# If it's str, we need to make sure that it's just ASCII.
try:
hostName = hostName.encode("ascii")
except UnicodeEncodeError:
# If it's not just ASCII, IDNA it. We don't want to give a Unicode
# string with non-ASCII in it to Python 3, as if anyone passes that
# to a Python 3 stdlib function, it will probably use the wrong
# IDNA version and break absolutely everything
hostName = _idnaBytes(hostName)
# Make sure it's passed down as a native str, to maintain the interface
hostName = nativeString(hostName)
resolution = HostResolution(hostName)
resolutionReceiver.resolutionBegan(resolution)
onAddress = self._simpleResolver.getHostByName(hostName)
def addressReceived(address):
resolutionReceiver.addressResolved(
IPv4Address("TCP", address, portNumber))
def errorReceived(error):
if not error.check(DNSLookupError):
self._log.failure(
"while looking up {name} with {resolver}",
error,
name=hostName,
resolver=self._simpleResolver,
)
onAddress.addCallbacks(addressReceived, errorReceived)
def finish(result):
resolutionReceiver.resolutionComplete()
onAddress.addCallback(finish)
return resolution
def resolveHostName(self, resolutionReceiver, hostName, portNumber=0,
addressTypes=None, transportSemantics='TCP'):
"""
See L{IHostnameResolver.resolveHostName}
@param resolutionReceiver: see interface
@param hostName: see interface
@param portNumber: see interface
@param addressTypes: see interface
@param transportSemantics: see interface
@return: see interface
"""
# If it's str, we need to make sure that it's just ASCII.
try:
hostName = hostName.encode('ascii')
except UnicodeEncodeError:
# If it's not just ASCII, IDNA it. We don't want to give a Unicode
# string with non-ASCII in it to Python 3, as if anyone passes that
# to a Python 3 stdlib function, it will probably use the wrong
# IDNA version and break absolutely everything
hostName = _idnaBytes(hostName)
# Make sure it's passed down as a native str, to maintain the interface
hostName = nativeString(hostName)
resolution = HostResolution(hostName)
resolutionReceiver.resolutionBegan(resolution)
onAddress = self._simpleResolver.getHostByName(hostName)
def addressReceived(address):
resolutionReceiver.addressResolved(IPv4Address('TCP', address,
portNumber))
def errorReceived(error):
if not error.check(DNSLookupError):
self._log.failure("while looking up {name} with {resolver}",
error, name=hostName,
resolver=self._simpleResolver)
onAddress.addCallbacks(addressReceived, errorReceived)
def finish(result):
resolutionReceiver.resolutionComplete()
onAddress.addCallback(finish)
return resolution