class StandardIO(object):
implements(interfaces.ITransport, interfaces.IProducer,
interfaces.IConsumer, interfaces.IHalfCloseableDescriptor)
_reader = None
_writer = None
disconnected = False
disconnecting = False
def __init__(self, proto, stdin=0, stdout=1):
from lib.twisted.internet import reactor
self.protocol = proto
self._writer = process.ProcessWriter(reactor, self, 'write', stdout)
try:
self._writer.startReading()
except IOError, e:
if e.errno == errno.EPERM:
# epoll will reject certain file descriptors by raising
# EPERM. Most commonly, this means stdout was redirected to
# a regular file.
raise RuntimeError(
"This reactor does not support this type of file "
"descriptor (fd %d, mode %d) (for example, epollreactor "
"does not support normal files. See #4429)." %
(stdout, os.fstat(stdout).st_mode))
raise
self._reader = process.ProcessReader(reactor, self, 'read', stdin)
self._reader.startReading()
self.protocol.makeConnection(self)
class _ZipMapImpl:
""" IPathImportMapper implementation for zipimport.ZipImporter. """
implements(IPathImportMapper)
def __init__(self, importer):
self.importer = importer
def mapPath(self, fsPathString):
"""
Map the given FS path to a ZipPath, by looking at the ZipImporter's
"archive" attribute and using it as our ZipArchive root, then walking
down into the archive from there.
@return: a L{zippath.ZipPath} or L{zippath.ZipArchive} instance.
"""
za = ZipArchive(self.importer.archive)
myPath = FilePath(self.importer.archive)
itsPath = FilePath(fsPathString)
if myPath == itsPath:
return za
# This is NOT a general-purpose rule for sys.path or __file__:
# zipimport specifically uses regular OS path syntax in its pathnames,
# even though zip files specify that slashes are always the separator,
# regardless of platform.
segs = itsPath.segmentsFrom(myPath)
zp = za
for seg in segs:
zp = zp.child(seg)
return zp
class IRCAccount(basesupport.AbstractAccount):
implements(interfaces.IAccount)
gatewayType = "IRC"
_groupFactory = IRCGroup
_personFactory = IRCPerson
def __init__(self,
accountName,
autoLogin,
username,
password,
host,
port,
channels=''):
basesupport.AbstractAccount.__init__(self, accountName, autoLogin,
username, password, host, port)
self.channels = map(string.strip, string.split(channels, ','))
if self.channels == ['']:
self.channels = []
def _startLogOn(self, chatui):
logonDeferred = defer.Deferred()
cc = protocol.ClientCreator(reactor, IRCProto, self, chatui,
logonDeferred)
d = cc.connectTCP(self.host, self.port)
d.addErrback(logonDeferred.errback)
return logonDeferred
class Service(service.Service):
"""
External server-side component service.
"""
implements(ijabber.IService)
def componentConnected(self, xs):
pass
def componentDisconnected(self):
pass
def transportConnected(self, xs):
pass
def send(self, obj):
"""
Send data over service parent's XML stream.
@note: L{ServiceManager} maintains a queue for data sent using this
method when there is no current established XML stream. This data is
then sent as soon as a new stream has been established and initialized.
Subsequently, L{componentConnected} will be called again. If this
queueing is not desired, use C{send} on the XmlStream object (passed to
L{componentConnected}) directly.
@param obj: data to be sent over the XML stream. This is usually an
object providing L{domish.IElement}, or serialized XML. See
L{xmlstream.XmlStream} for details.
"""
self.parent.send(obj)
class PBMindReference(pb.RemoteReference): implements(iwords.IChatClient) def receive(self, sender, recipient, message): if iwords.IGroup.providedBy(recipient): rec = PBGroup(self.realm, self.avatar, recipient) else: rec = PBUser(self.realm, self.avatar, recipient) return self.callRemote( 'receive', PBUser(self.realm, self.avatar, sender), rec, message) def groupMetaUpdate(self, group, meta): return self.callRemote( 'groupMetaUpdate', PBGroup(self.realm, self.avatar, group), meta) def userJoined(self, group, user): return self.callRemote( 'userJoined', PBGroup(self.realm, self.avatar, group), PBUser(self.realm, self.avatar, user)) def userLeft(self, group, user, reason=None): assert reason is None or isinstance(reason, unicode) return self.callRemote( 'userLeft', PBGroup(self.realm, self.avatar, group), PBUser(self.realm, self.avatar, user), reason)
class MulticastPort(MulticastMixin, Port):
"""
UDP Port that supports multicasting.
"""
implements(interfaces.IMulticastTransport)
def __init__(self,
port,
proto,
interface='',
maxPacketSize=8192,
reactor=None,
listenMultiple=False):
"""
@see: L{lib.twisted.internet.interfaces.IReactorMulticast.listenMulticast}
"""
Port.__init__(self, port, proto, interface, maxPacketSize, reactor)
self.listenMultiple = listenMultiple
def createInternetSocket(self):
skt = Port.createInternetSocket(self)
if self.listenMultiple:
skt.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
if hasattr(socket, "SO_REUSEPORT"):
skt.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
return skt
class InMemoryRegistry:
"""A simplistic registry for a specific domain."""
implements(IRegistry, ILocator)
def __init__(self, domain):
self.domain = domain # the domain we handle registration for
self.users = {
} # map username to (IDelayedCall for expiry, address URI)
def getAddress(self, userURI):
if userURI.host != self.domain:
return defer.fail(LookupError("unknown domain"))
if self.users.has_key(userURI.username):
dc, url = self.users[userURI.username]
return defer.succeed(url)
else:
return defer.fail(LookupError("no such user"))
def getRegistrationInfo(self, userURI):
if userURI.host != self.domain:
return defer.fail(LookupError("unknown domain"))
if self.users.has_key(userURI.username):
dc, url = self.users[userURI.username]
return defer.succeed(
Registration(int(dc.getTime() - time.time()), url))
else:
return defer.fail(LookupError("no such user"))
def _expireRegistration(self, username):
try:
dc, url = self.users[username]
except KeyError:
return defer.fail(LookupError("no such user"))
else:
dc.cancel()
del self.users[username]
return defer.succeed(Registration(0, url))
def registerAddress(self, domainURL, logicalURL, physicalURL):
if domainURL.host != self.domain:
log.msg("Registration for domain we don't handle.")
return defer.fail(RegistrationError(404))
if logicalURL.host != self.domain:
log.msg("Registration for domain we don't handle.")
return defer.fail(RegistrationError(404))
if self.users.has_key(logicalURL.username):
dc, old = self.users[logicalURL.username]
dc.reset(3600)
else:
dc = reactor.callLater(3600, self._expireRegistration,
logicalURL.username)
log.msg("Registered %s at %s" %
(logicalURL.toString(), physicalURL.toString()))
self.users[logicalURL.username] = (dc, physicalURL)
return defer.succeed(
Registration(int(dc.getTime() - time.time()), physicalURL))
def unregisterAddress(self, domainURL, logicalURL, physicalURL):
return self._expireRegistration(logicalURL.username)
class DirDBMLog:
"""Log pickles to DirDBM directory."""
implements(base.ICommandLog)
def __init__(self, logPath):
self.db = dirdbm.Shelf(logPath)
indexs = map(int, self.db.keys())
if indexs:
self.currentIndex = max(indexs)
else:
self.currentIndex = 0
def logCommand(self, command, time):
"""Log a command."""
self.currentIndex += 1
self.db[str(self.currentIndex)] = (time, command)
return defer.succeed(1)
def getCurrentIndex(self):
"""Return index of last command logged."""
return self.currentIndex
def getCommandsSince(self, index):
result = []
for i in range(index, self.currentIndex + 1):
result.append(self.db[str(i)])
return result
class HierarchicalBucketFilter:
"""I filter things into buckets, and I am nestable.
@cvar bucketFactory: Class of buckets to make.
@type bucketFactory: L{Bucket} class
@cvar sweepInterval: Seconds between sweeping out the bucket cache.
@type sweepInterval: int
"""
implements(IBucketFilter)
bucketFactory = Bucket
sweepInterval = None
def __init__(self, parentFilter=None):
self.buckets = {}
self.parentFilter = parentFilter
self.lastSweep = time()
def getBucketFor(self, *a, **kw):
"""You want a bucket for that? I'll give you a bucket.
Any parameters are passed on to L{getBucketKey}, from them it
decides which bucket you get.
@returntype: L{Bucket}
"""
if ((self.sweepInterval is not None)
and ((time() - self.lastSweep) > self.sweepInterval)):
self.sweep()
if self.parentFilter:
parentBucket = self.parentFilter.getBucketFor(self, *a, **kw)
else:
parentBucket = None
key = self.getBucketKey(*a, **kw)
bucket = self.buckets.get(key)
if bucket is None:
bucket = self.bucketFactory(parentBucket)
self.buckets[key] = bucket
return bucket
def getBucketKey(self, *a, **kw):
"""I determine who gets which bucket.
Unless I'm overridden, everything gets the same bucket.
@returns: something to be used as a key in the bucket cache.
"""
return None
def sweep(self):
"""I throw away references to empty buckets."""
for key, bucket in self.buckets.items():
if (bucket._refcount == 0) and bucket.drip():
del self.buckets[key]
self.lastSweep = time()
class DatagramPort(_UNIXPort, udp.Port): """Datagram UNIX port, listening for packets.""" implements(interfaces.IUNIXDatagramTransport) addressFamily = socket.AF_UNIX def __init__(self, addr, proto, maxPacketSize=8192, mode=0666, reactor=None):
class Port(_SocketCloser):
implements(interfaces.IListeningPort)
connected = False
disconnected = False
disconnecting = False
addressFamily = socket.AF_INET
socketType = socket.SOCK_STREAM
sessionno = 0
maxAccepts = 100
# Actual port number being listened on, only set to a non-None
# value when we are actually listening.
_realPortNumber = None
def __init__(self, port, factory, backlog=50, interface='', reactor=None):
self.port = port
self.factory = factory
self.backlog = backlog
self.interface = interface
self.reactor = reactor
def __repr__(self):
if self._realPortNumber is not None:
return "<%s of %s on %s>" % (
self.__class__, self.factory.__class__, self._realPortNumber)
else:
return "<%s of %s (not listening)>" % (self.__class__,
self.factory.__class__)
def startListening(self):
try:
skt = self.reactor.createSocket(self.addressFamily,
self.socketType)
# TODO: resolve self.interface if necessary
skt.bind((self.interface, self.port))
except socket.error, le:
raise error.CannotListenError, (self.interface, self.port, le)
self.addrLen = _iocp.maxAddrLen(skt.fileno())
# Make sure that if we listened on port 0, we update that to
# reflect what the OS actually assigned us.
self._realPortNumber = skt.getsockname()[1]
log.msg("%s starting on %s" %
(self.factory.__class__, self._realPortNumber))
self.factory.doStart()
skt.listen(self.backlog)
self.connected = True
self.disconnected = False
self.reactor.addActiveHandle(self)
self.socket = skt
self.getFileHandle = self.socket.fileno
self.doAccept()
class LookupTable:
implements(ILookupTable)
def __init__(self, table):
self._table = table
def lookup(self, c):
return c in self._table
class LoopbackRelay:
implements(interfaces.ITransport, interfaces.IConsumer)
buffer = ''
shouldLose = 0
disconnecting = 0
producer = None
def __init__(self, target, logFile=None):
self.target = target
self.logFile = logFile
def write(self, data):
self.buffer = self.buffer + data
if self.logFile:
self.logFile.write("loopback writing %s\n" % repr(data))
def writeSequence(self, iovec):
self.write("".join(iovec))
def clearBuffer(self):
if self.shouldLose == -1:
return
if self.producer:
self.producer.resumeProducing()
if self.buffer:
if self.logFile:
self.logFile.write("loopback receiving %s\n" %
repr(self.buffer))
buffer = self.buffer
self.buffer = ''
self.target.dataReceived(buffer)
if self.shouldLose == 1:
self.shouldLose = -1
self.target.connectionLost(failure.Failure(main.CONNECTION_DONE))
def loseConnection(self):
if self.shouldLose != -1:
self.shouldLose = 1
def getHost(self):
return 'loopback'
def getPeer(self):
return 'loopback'
def registerProducer(self, producer, streaming):
self.producer = producer
def unregisterProducer(self):
self.producer = None
def logPrefix(self):
return 'Loopback(%r)' % (self.target.__class__.__name__, )
class TCP4ClientEndpoint(object):
"""
TCP client endpoint with an IPv4 configuration.
@ivar _reactor: An L{IReactorTCP} provider.
@type _host: str
@ivar _host: The hostname to connect to as a C{str}
@type _port: int
@ivar _port: The port to connect to as C{int}
@type _timeout: int
@ivar _timeout: number of seconds to wait before assuming the
connection has failed.
@type _bindAddress: tuple
@type _bindAddress: a (host, port) tuple of local address to bind
to, or None.
"""
implements(interfaces.IStreamClientEndpoint)
def __init__(self, reactor, host, port, timeout=30, bindAddress=None):
"""
@param reactor: An L{IReactorTCP} provider
@param host: A hostname, used when connecting
@param port: The port number, used when connecting
@param timeout: number of seconds to wait before assuming the
connection has failed.
@param bindAddress: a (host, port tuple of local address to bind to,
or None.
"""
self._reactor = reactor
self._host = host
self._port = port
self._timeout = timeout
self._bindAddress = bindAddress
def connect(self, protocolFactory):
"""
Implement L{IStreamClientEndpoint.connect} to connect via TCP.
"""
def _canceller(deferred):
connector.stopConnecting()
deferred.errback(
error.ConnectingCancelledError(connector.getDestination()))
try:
wf = _WrappingFactory(protocolFactory, _canceller)
connector = self._reactor.connectTCP(
self._host, self._port, wf,
timeout=self._timeout, bindAddress=self._bindAddress)
return wf._onConnection
except:
return defer.fail()
class ProtocolToConsumerAdapter(components.Adapter): implements(interfaces.IConsumer) def write(self, data): self.original.dataReceived(data) def registerProducer(self, producer, streaming): pass def unregisterProducer(self): pass
class Anonymous(object):
"""
Implements the ANONYMOUS SASL authentication mechanism.
This mechanism is defined in RFC 2245.
"""
implements(ISASLMechanism)
name = 'ANONYMOUS'
def getInitialResponse(self):
return None
class SSL4ServerEndpoint(object):
"""
SSL secured TCP server endpoint with an IPv4 configuration.
@ivar _reactor: An L{IReactorSSL} provider.
@type _host: str
@ivar _host: The hostname to connect to as a C{str}
@type _port: int
@ivar _port: The port to connect to as C{int}
@type _sslContextFactory: L{OpenSSLCertificateOptions}
@var _sslContextFactory: SSL Configuration information as an
L{OpenSSLCertificateOptions}
@type _backlog: int
@ivar _backlog: size of the listen queue
@type _interface: str
@ivar _interface: the hostname to bind to, defaults to '' (all)
"""
implements(interfaces.IStreamServerEndpoint)
def __init__(self, reactor, port, sslContextFactory,
backlog=50, interface=''):
"""
@param reactor: An L{IReactorSSL} provider.
@param port: The port number used listening
@param sslContextFactory: An instance of
L{lib.twisted.internet._sslverify.OpenSSLCertificateOptions}.
@param timeout: number of seconds to wait before assuming the
connection has failed.
@param bindAddress: a (host, port tuple of local address to bind to,
or None.
"""
self._reactor = reactor
self._port = port
self._sslContextFactory = sslContextFactory
self._backlog = backlog
self._interface = interface
def listen(self, protocolFactory):
"""
Implement L{IStreamServerEndpoint.listen} to listen for SSL on a
TCP socket.
"""
return defer.execute(self._reactor.listenSSL, self._port,
protocolFactory,
contextFactory=self._sslContextFactory,
backlog=self._backlog,
interface=self._interface)
class EmptyMappingTable:
implements(IMappingTable)
def __init__(self, in_table_function):
self._in_table_function = in_table_function
def map(self, c):
if self._in_table_function(c):
return None
else:
return c
class BlockingResolver: implements(IResolverSimple) def getHostByName(self, name, timeout = (1, 3, 11, 45)): try: address = socket.gethostbyname(name) except socket.error: msg = "address %r not found" % (name,) err = error.DNSLookupError(msg) return defer.fail(err) else: return defer.succeed(address)
class UNIXClientEndpoint(object):
"""
UnixSocket client endpoint.
@type _path: str
@ivar _path: a path to a unix socket on the filesystem.
@type _timeout: int
@ivar _timeout: number of seconds to wait before assuming the connection
has failed.
@type _checkPID: bool
@ivar _checkPID: if True, check for a pid file to verify that a server
is listening.
@var _reactor: An L{IReactorUNIX} provider.
"""
implements(interfaces.IStreamClientEndpoint)
def __init__(self, reactor, path, timeout=30, checkPID=0):
"""
@param reactor: An L{IReactorUNIX} provider.
@param path: The path to the Unix socket file, used when connecting
@param timeout: number of seconds to wait before assuming the
connection has failed.
@param checkPID: if True, check for a pid file to verify that a server
is listening.
"""
self._reactor = reactor
self._path = path
self._timeout = timeout
self._checkPID = checkPID
def connect(self, protocolFactory):
"""
Implement L{IStreamClientEndpoint.connect} to connect via a
UNIX Socket
"""
def _canceller(deferred):
connector.stopConnecting()
deferred.errback(
error.ConnectingCancelledError(connector.getDestination()))
try:
wf = _WrappingFactory(protocolFactory, _canceller)
connector = self._reactor.connectUNIX(
self._path, wf,
timeout=self._timeout,
checkPID=self._checkPID)
return wf._onConnection
except:
return defer.fail()
class _PollableReadPipe(_PollableResource):
implements(IPushProducer)
def __init__(self, pipe, receivedCallback, lostCallback):
# security attributes for pipes
self.pipe = pipe
self.receivedCallback = receivedCallback
self.lostCallback = lostCallback
def checkWork(self):
finished = 0
fullDataRead = []
while 1:
try:
buffer, bytesToRead, result = win32pipe.PeekNamedPipe(
self.pipe, 1)
# finished = (result == -1)
if not bytesToRead:
break
hr, data = win32file.ReadFile(self.pipe, bytesToRead, None)
fullDataRead.append(data)
except win32api.error:
finished = 1
break
dataBuf = ''.join(fullDataRead)
if dataBuf:
self.receivedCallback(dataBuf)
if finished:
self.cleanup()
return len(dataBuf)
def cleanup(self):
self.deactivate()
self.lostCallback()
def close(self):
try:
win32api.CloseHandle(self.pipe)
except pywintypes.error:
# You can't close std handles...?
pass
def stopProducing(self):
self.close()
def pauseProducing(self):
self.deactivate()
def resumeProducing(self):
self.activate()
class PBGroupReference(pb.RemoteReference):
implements(iwords.IGroup)
def unjellyFor(self, unjellier, unjellyList):
clsName, name, ref = unjellyList
self.name = name.decode('utf-8')
return pb.RemoteReference.unjellyFor(self, unjellier, [clsName, ref])
def leave(self, reason=None):
return self.callRemote("leave", reason)
def send(self, message):
return self.callRemote("send", message)
class IPv4Address(object):
"""
Object representing an IPv4 socket endpoint.
@ivar type: A string describing the type of transport, either 'TCP' or 'UDP'.
@ivar host: A string containing the dotted-quad IP address.
@ivar port: An integer representing the port number.
"""
# _bwHack is given to old users who think we are a tuple. They expected
# addr[0] to define the socket type rather than the address family, so
# the value comes from a different namespace than the new .type value:
# type = map[_bwHack]
# map = { 'SSL': 'TCP', 'INET': 'TCP', 'INET_UDP': 'UDP' }
implements(IAddress)
def __init__(self, type, host, port, _bwHack=None):
assert type in ('TCP', 'UDP')
self.type = type
self.host = host
self.port = port
self._bwHack = _bwHack
def __getitem__(self, index):
warnings.warn(
"IPv4Address.__getitem__ is deprecated. Use attributes instead.",
category=DeprecationWarning,
stacklevel=2)
return (self._bwHack
or self.type, self.host, self.port).__getitem__(index)
def __getslice__(self, start, stop):
warnings.warn(
"IPv4Address.__getitem__ is deprecated. Use attributes instead.",
category=DeprecationWarning,
stacklevel=2)
return (self._bwHack or self.type, self.host, self.port)[start:stop]
def __eq__(self, other):
if isinstance(other, tuple):
return tuple(self) == other
elif isinstance(other, IPv4Address):
a = (self.type, self.host, self.port)
b = (other.type, other.host, other.port)
return a == b
return False
def __repr__(self):
return 'IPv4Address(%s, %r, %d)' % (self.type, self.host, self.port)
class ConsumerToProtocolAdapter(components.Adapter): implements(interfaces.IProtocol) def dataReceived(self, data): self.original.write(data) def connectionLost(self, reason): pass def makeConnection(self, transport): pass def connectionMade(self): pass
class TOCAccount(basesupport.AbstractAccount):
implements(interfaces.IAccount)
gatewayType = "AIM (TOC)"
_groupFactory = TOCGroup
_personFactory = TOCPerson
def _startLogOn(self, chatui):
logonDeferred = defer.Deferred()
cc = protocol.ClientCreator(reactor, TOCProto, self, chatui,
logonDeferred)
d = cc.connectTCP(self.host, self.port)
d.addErrback(logonDeferred.errback)
return logonDeferred
class Server(tcp.Server):
"""I am an SSL server.
"""
implements(interfaces.ISSLTransport)
def getHost(self):
"""Return server's address."""
h, p = self.socket.getsockname()
return address.IPv4Address('TCP', h, p, 'SSL')
def getPeer(self):
"""Return address of peer."""
h, p = self.client
return address.IPv4Address('TCP', h, p, 'SSL')
class UNIXServerEndpoint(object):
"""
UnixSocket server endpoint.
@type path: str
@ivar path: a path to a unix socket on the filesystem.
@type _listenArgs: dict
@ivar _listenArgs: A C{dict} of keyword args that will be passed
to L{IReactorUNIX.listenUNIX}
@var _reactor: An L{IReactorTCP} provider.
"""
implements(interfaces.IStreamServerEndpoint)
def __init__(self, reactor, address, backlog=50, mode=0666, wantPID=0):
class UNIXAddress(object):
"""
Object representing a UNIX socket endpoint.
@ivar name: The filename associated with this socket.
@type name: C{str}
"""
implements(IAddress)
def __init__(self, name, _bwHack='UNIX'):
self.name = name
self._bwHack = _bwHack
def __getitem__(self, index):
warnings.warn(
"UNIXAddress.__getitem__ is deprecated. Use attributes instead.",
category=DeprecationWarning,
stacklevel=2)
return (self._bwHack, self.name).__getitem__(index)
def __getslice__(self, start, stop):
warnings.warn(
"UNIXAddress.__getitem__ is deprecated. Use attributes instead.",
category=DeprecationWarning,
stacklevel=2)
return (self._bwHack, self.name)[start:stop]
def __eq__(self, other):
if isinstance(other, tuple):
return tuple(self) == other
elif isinstance(other, UNIXAddress):
# First do the simple thing and check to see if the names are the
# same. If not, and the paths exist, check to see if they point to
# the same file.
if self.name == other.name:
return True
else:
try:
return os.path.samefile(self.name, other.name)
except OSError:
pass
return False
def __repr__(self):
return 'UNIXAddress(%r)' % (self.name, )
class Chargen(protocol.Protocol):
"""Generate repeating noise (RFC 864)"""
noise = r'@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ !"#$%&?'
implements(interfaces.IProducer)
def connectionMade(self):
self.transport.registerProducer(self, 0)
def resumeProducing(self):
self.transport.write(self.noise)
def pauseProducing(self):
pass
def stopProducing(self):
pass
class DigestAuthorizer:
CHALLENGE_LIFETIME = 15
implements(IAuthorizer)
def __init__(self):
warnings.warn(
"lib.twisted.protocols.sip.DigestAuthorizer was deprecated "
"in Twisted 9.0.0",
category=DeprecationWarning,
stacklevel=2)
self.outstanding = {}
def generateNonce(self):
c = tuple([random.randrange(sys.maxint) for _ in range(3)])
c = '%d%d%d' % c
return c
def generateOpaque(self):
return str(random.randrange(sys.maxint))
def getChallenge(self, peer):
c = self.generateNonce()
o = self.generateOpaque()
self.outstanding[o] = c
return ','.join((
'nonce="%s"' % c,
'opaque="%s"' % o,
'qop-options="auth"',
'algorithm="MD5"',
))
def decode(self, response):
response = ' '.join(response.splitlines())
parts = response.split(',')
auth = dict([(k.strip(), unq(v.strip()))
for (k, v) in [p.split('=', 1) for p in parts]])
try:
username = auth['username']
except KeyError:
raise SIPError(401)
try:
return DigestedCredentials(username, auth, self.outstanding)
except:
raise SIPError(400)