def test_resolves13RootServers(self):
"""
The L{IResolverSimple} supplied to L{root.bootstrap} is used to lookup
the IP addresses of the 13 root name servers.
"""
stubResolver = StubResolver()
root.bootstrap(stubResolver)
self.assertEqual(stubResolver.calls, [((s,), {}) for s in ROOT_SERVERS])
def test_resolves13RootServers(self):
"""
The L{IResolverSimple} supplied to L{root.bootstrap} is used to lookup
the IP addresses of the 13 root name servers.
"""
stubResolver = StubResolver()
root.bootstrap(stubResolver)
self.assertEqual(
stubResolver.calls,
[((s,), {}) for s in ROOT_SERVERS])
def test_returnsDeferredResolver(self):
"""
L{root.bootstrap} returns an object which is initially a
L{root.DeferredResolver}.
"""
deferredResolver = root.bootstrap(StubResolver())
self.assertIsInstance(deferredResolver, root.DeferredResolver)
def test_returnsDeferredResolver(self):
"""
L{root.bootstrap} returns an object which is initially a
L{root.DeferredResolver}.
"""
deferredResolver = root.bootstrap(StubResolver())
self.assertIsInstance(deferredResolver, root.DeferredResolver)
def test_resolverReceivesRootHints(self):
"""
The L{root.Resolver} which eventually replaces L{root.DeferredResolver}
is supplied with the IP addresses of the 13 root servers.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(stubResolver)
for d in stubResolver.pendingResults:
d.callback("192.0.2.101")
self.assertEqual(deferredResolver.hints, ["192.0.2.101"] * 13)
def test_resolverReceivesRootHints(self):
"""
The L{root.Resolver} which eventually replaces L{root.DeferredResolver}
is supplied with the IP addresses of the 13 root servers.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(stubResolver)
for d in stubResolver.pendingResults:
d.callback('192.0.2.101')
self.assertEqual(deferredResolver.hints, ['192.0.2.101'] * 13)
def test_becomesResolver(self):
"""
The L{root.DeferredResolver} initially returned by L{root.bootstrap}
becomes a L{root.Resolver} when the supplied resolver has successfully
looked up all root hints.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(stubResolver)
for d in stubResolver.pendingResults:
d.callback('192.0.2.101')
self.assertIsInstance(deferredResolver, Resolver)
def test_becomesResolver(self):
"""
The L{root.DeferredResolver} initially returned by L{root.bootstrap}
becomes a L{root.Resolver} when the supplied resolver has successfully
looked up all root hints.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(stubResolver)
for d in stubResolver.pendingResults:
d.callback("192.0.2.101")
self.assertIsInstance(deferredResolver, Resolver)
def test_passesResolverFactory(self):
"""
L{root.bootstrap} accepts a C{resolverFactory} argument which is passed
as an argument to L{root.Resolver} when it has successfully looked up
root hints.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(
stubResolver, resolverFactory=raisingResolverFactory)
for d in stubResolver.pendingResults:
d.callback("192.0.2.101")
self.assertIs(deferredResolver._resolverFactory,
raisingResolverFactory)
def test_passesResolverFactory(self):
"""
L{root.bootstrap} accepts a C{resolverFactory} argument which is passed
as an argument to L{root.Resolver} when it has successfully looked up
root hints.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(
stubResolver, resolverFactory=raisingResolverFactory)
for d in stubResolver.pendingResults:
d.callback('192.0.2.101')
self.assertIs(
deferredResolver._resolverFactory, raisingResolverFactory)
def test_continuesWhenSomeRootHintsFail(self):
"""
The L{root.Resolver} is eventually created, even if some of the root
hint lookups fail. Only the working root hint IP addresses are supplied
to the L{root.Resolver}.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(stubResolver)
results = iter(stubResolver.pendingResults)
d1 = next(results)
for d in results:
d.callback('192.0.2.101')
d1.errback(TimeoutError())
def checkHints(res):
self.assertEqual(deferredResolver.hints, ['192.0.2.101'] * 12)
d1.addBoth(checkHints)
def create_resolver(servers=None, resolvconf=None, hosts=None):
if platform.getType() == 'posix':
if resolvconf is None:
resolvconf = b'/etc/resolv.conf'
if hosts is None:
hosts = b'/etc/hosts'
the_resolver = client.Resolver(resolvconf, servers)
host_resolver = Resolver(hosts)
else:
if hosts is None:
hosts = r'c:\windows\hosts'
from twisted.internet import reactor
bootstrap = client._ThreadedResolverImpl(reactor)
host_resolver = Resolver(hosts)
the_resolver = root.bootstrap(bootstrap, resolverFactory=client.Resolver)
return resolve.ResolverChain([host_resolver, cache.CacheResolver(), the_resolver])
def test_continuesWhenSomeRootHintsFail(self):
"""
The L{root.Resolver} is eventually created, even if some of the root
hint lookups fail. Only the working root hint IP addresses are supplied
to the L{root.Resolver}.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(stubResolver)
results = iter(stubResolver.pendingResults)
d1 = next(results)
for d in results:
d.callback('192.0.2.101')
d1.errback(TimeoutError())
def checkHints(res):
self.assertEqual(deferredResolver.hints, ['192.0.2.101'] * 12)
d1.addBoth(checkHints)
def test_continuesWhenAllRootHintsFail(self):
"""
The L{root.Resolver} is eventually created, even if all of the root hint
lookups fail. Pending and new lookups will then fail with
AttributeError.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(stubResolver)
results = iter(stubResolver.pendingResults)
d1 = next(results)
for d in results:
d.errback(TimeoutError())
d1.errback(TimeoutError())
def checkHints(res):
self.assertEqual(deferredResolver.hints, [])
d1.addBoth(checkHints)
self.addCleanup(self.flushLoggedErrors, TimeoutError)
def createResolver(servers=None, resolvconf=None, hosts=None):
from twisted.names import resolve, cache, root, hosts as hostsModule
if platform.getType() == 'posix':
if resolvconf is None:
resolvconf = '/etc/resolv.conf'
if hosts is None:
hosts = '/etc/hosts'
theResolver = HardcoreResolver(resolvconf, servers)
hostResolver = hostsModule.Resolver(hosts)
else:
if hosts is None:
hosts = r'c:\windows\hosts'
from twisted.internet import reactor
bootstrap = _ThreadedResolverImpl(reactor)
hostResolver = hostsModule.Resolver(hosts)
theResolver = root.bootstrap(bootstrap)
L = [hostResolver, cache.CacheResolver(), theResolver]
return resolve.ResolverChain(L)
def test_continuesWhenAllRootHintsFail(self):
"""
The L{root.Resolver} is eventually created, even if all of the root hint
lookups fail. Pending and new lookups will then fail with
AttributeError.
"""
stubResolver = StubResolver()
deferredResolver = root.bootstrap(stubResolver)
results = iter(stubResolver.pendingResults)
d1 = next(results)
for d in results:
d.errback(TimeoutError())
d1.errback(TimeoutError())
def checkHints(res):
self.assertEqual(deferredResolver.hints, [])
d1.addBoth(checkHints)
self.addCleanup(self.flushLoggedErrors, TimeoutError)
def createResolver(servers=None, resolvconf=None, hosts=None):
r"""
Create and return a Resolver.
@type servers: C{list} of C{(str, int)} or L{None}
@param servers: If not L{None}, interpreted as a list of domain name servers
to attempt to use. Each server is a tuple of address in C{str} dotted-quad
form and C{int} port number.
@type resolvconf: C{str} or L{None}
@param resolvconf: If not L{None}, on posix systems will be interpreted as
an alternate resolv.conf to use. Will do nothing on windows systems. If
L{None}, /etc/resolv.conf will be used.
@type hosts: C{str} or L{None}
@param hosts: If not L{None}, an alternate hosts file to use. If L{None}
on posix systems, /etc/hosts will be used. On windows, C:\windows\hosts
will be used.
@rtype: C{IResolver}
"""
if platform.getType() == "posix":
if resolvconf is None:
resolvconf = b"/etc/resolv.conf"
if hosts is None:
hosts = b"/etc/hosts"
theResolver = Resolver(resolvconf, servers)
hostResolver = hostsModule.Resolver(hosts)
else:
if hosts is None:
hosts = r"c:\windows\hosts"
from twisted.internet import reactor
bootstrap = _ThreadedResolverImpl(reactor)
hostResolver = hostsModule.Resolver(hosts)
theResolver = root.bootstrap(bootstrap, resolverFactory=Resolver)
L = [hostResolver, cache.CacheResolver(), theResolver]
return resolve.ResolverChain(L)
def createResolver(servers=None, resolvconf=None, hosts=None):
"""
Create and return a Resolver.
@type servers: C{list} of C{(str, int)} or C{None}
@param servers: If not C{None}, interpreted as a list of domain name servers
to attempt to use. Each server is a tuple of address in C{str} dotted-quad
form and C{int} port number.
@type resolvconf: C{str} or C{None}
@param resolvconf: If not C{None}, on posix systems will be interpreted as
an alternate resolv.conf to use. Will do nothing on windows systems. If
C{None}, /etc/resolv.conf will be used.
@type hosts: C{str} or C{None}
@param hosts: If not C{None}, an alternate hosts file to use. If C{None}
on posix systems, /etc/hosts will be used. On windows, C:\windows\hosts
will be used.
@rtype: C{IResolver}
"""
from twisted.names import resolve, cache, root, hosts as hostsModule
if platform.getType() == 'posix':
if resolvconf is None:
resolvconf = b'/etc/resolv.conf'
if hosts is None:
hosts = b'/etc/hosts'
theResolver = Resolver(resolvconf, servers)
hostResolver = hostsModule.Resolver(hosts)
else:
if hosts is None:
hosts = r'c:\windows\hosts'
from twisted.internet import reactor
bootstrap = _ThreadedResolverImpl(reactor)
hostResolver = hostsModule.Resolver(hosts)
theResolver = root.bootstrap(bootstrap)
L = [hostResolver, cache.CacheResolver(), theResolver]
return resolve.ResolverChain(L)
def createResolver(servers=None, resolvconf=None, hosts=None):
"""
Create and return a Resolver.
@type servers: C{list} of C{(str, int)} or C{None}
@param servers: If not C{None}, interpreted as a list of addresses of
domain name servers to attempt to use. Addresses should be in dotted-quad
form.
@type resolvconf: C{str} or C{None}
@param resolvconf: If not C{None}, on posix systems will be interpreted as
an alternate resolv.conf to use. Will do nothing on windows systems. If
C{None}, /etc/resolv.conf will be used.
@type hosts: C{str} or C{None}
@param hosts: If not C{None}, an alternate hosts file to use. If C{None}
on posix systems, /etc/hosts will be used. On windows, C:\windows\hosts
will be used.
@rtype: C{IResolver}
"""
from twisted.names import resolve, cache, root, hosts as hostsModule
if platform.getType() == 'posix':
if resolvconf is None:
resolvconf = '/etc/resolv.conf'
if hosts is None:
hosts = '/etc/hosts'
theResolver = Resolver(resolvconf, servers)
hostResolver = hostsModule.Resolver(hosts)
else:
if hosts is None:
hosts = r'c:\windows\hosts'
from twisted.internet import reactor
bootstrap = _ThreadedResolverImpl(reactor)
hostResolver = hostsModule.Resolver(hosts)
theResolver = root.bootstrap(bootstrap)
L = [hostResolver, cache.CacheResolver(), theResolver]
return resolve.ResolverChain(L)
