def parse_view_result(self, rows, tag):
# here we are given multiple float values for the same document,
# we parse them as decimals and sum
# ['loan_amount', 1002.2], {'_id': 'merchant_record_1'}
# ['loan_amount', 2001.2], {'_id': 'merchant_record_2'}
# ...
# is resolved to the following:
# [('merchant_record_1', decimal.Decimal('1002.20')),
# ('merchant_record_2', decimal.Decimal('2001.20'))]
indexes = dict() # doc_id -> index in result table
result = list()
for row in rows:
if row[1] and self.id_key in row[1]:
doc_id = row[1][self.id_key]
else:
doc_id = row[2]
if doc_id not in indexes:
indexes[doc_id] = len(result)
result.append((doc_id, decimal.Decimal()))
try:
v = decimal.Decimal(str(row[0][1]))
except:
error.handle_exception(None, None, "Failed parsing decimal value")
continue
else:
result[indexes[doc_id]] = (doc_id, result[indexes[doc_id]][1] + v)
return ParsedIndex(result, keep_value=True)
def load(module_name, name):
log.info('application', "Importing application %s from module %s",
name, module_name)
module = sys.modules.get(module_name)
if module:
log.warning('application',
"Application module %s has already been loaded. ",
module_name)
else:
module = reflect.named_module(module_name)
application = getattr(module, name, None)
if application is None:
raise ValueError('Module %s has no attribute %s' % (module_name, name))
if not IApplication.providedBy(application):
raise ValueError('Variable %s.%s should provide IApplication interface'
% (module_name, name))
try:
application.load()
except Exception as e:
error.handle_exception(
'application', e, 'Error loading application: %s',
application.name)
application.unload()
raise
else:
get_application_registry().register(application)
log.info('application', "Loading application %s complete.", name)
def migration_script(connection):
log.info("script", "Running the migration script.")
for application in applications.get_application_registry().itervalues():
keys = ApplicationVersions.key_for(application.name)
version_doc = yield connection.query_view(ApplicationVersions, **keys)
if not version_doc:
to_run = application.get_migrations()
version_doc = ApplicationVersion(name=unicode(application.name))
else:
version_doc = version_doc[0]
to_run = [(version, migration)
for version, migration in application.get_migrations()
if version > version_doc.version]
if not to_run:
log.info("script", "There are no migrations for application %s "
"from version %s to %s", application.name,
version_doc.version, application.version)
continue
try:
for version, migration in to_run:
yield migration.run(connection._database)
if isinstance(version, str):
version = unicode(version)
version_doc.version = version
yield connection.save_document(version_doc)
log.info("script", "Successfully applied migration %r",
migration)
except Exception as e:
error.handle_exception("script", e, "Failed applying migration %r",
migration)
continue
def view_aterator(connection, callback, view, view_keys=dict(),
args=tuple(), kwargs=dict(), per_page=15,
consume_errors=True):
'''
Asynchronous iterator for the view. Downloads a view in pages
and calls the callback for each row.
This helps avoid transfering data in huge datachunks.
'''
skip = 0
while True:
keys = dict(view_keys)
keys.update(dict(skip=skip, limit=per_page))
records = yield connection.query_view(view, **keys)
log.debug('view_aterator', "Fetched %d records of the view: %s",
len(records), view.name)
skip += len(records)
for record in records:
try:
yield callback(connection, record, *args, **kwargs)
except Exception as e:
error.handle_exception(
'view_aterator', e,
"Callback %s failed its iteration on a row %r",
callback.__name__, record)
if not consume_errors:
raise e
if not records:
break
def render_select_response(value, context, *args, **kwargs):
cls = type(context['model'])
if not cls._query_set_factory:
# query set collection is created only once per class type
factory = MetaQueryResult.new(cls)
factory.annotate_meta('json', 'render-as-list')
cls._query_set_factory = factory
if cls._fetch_documents_set:
context['result'].update(value)
# convert all the aggregate values using their IValueInfo
if kwargs.get('aggregate'):
raw_values = context['result'].aggregations
context['result'].aggregations = dict()
for index, name in enumerate(kwargs['aggregate']):
value_info = cls._model_aggregations[name][0]
v = raw_values[index]
try:
published = value_info.publish(v)
except Exception as e:
error.handle_exception(
None, e, "Failed publishing the result %r", v)
else:
context['result'].aggregations[name] = published
result = cls._query_set_factory(context['source'],
context['result'])
return result.initiate(view=context['view'],
officer=context.get('officer'),
aspect=context.get('aspect'))
def _process_request(self, priv_request):
self.log(
"%s on %s from %s:%s",
priv_request.method,
priv_request.uri,
priv_request.client.host,
priv_request.client.port,
)
request = None
response = None
try:
# First create request and response parsing HTTP headers and so
request = Request(self, priv_request)
response = Response(self, request)
except Exception, e:
# Early error, just log and respond something that make sense
msg = "Exception during HTTP request creation"
error.handle_exception(self, e, msg)
priv_request.setResponseCode(http.Status.INTERNAL_SERVER_ERROR)
priv_request.setHeader("content-type", "text/plain")
return "Error: %s" % e
def startup(self, port):
try:
self._tcp_listener = reactor.listenTCP(port, self._dns_fact)
except error.CannotListenError, e:
feat_error.handle_exception(
self, e, "Error listening on TCP on port %r", port)
return False
def _initiate_tunneling(self, tconfig):
assert isinstance(tconfig, config.TunnelConfig), str(type(tconfig))
try:
host = tconfig.host
port = int(tconfig.port)
p12 = tconfig.p12
port_range = range(port, port + TUNNELING_PORT_COUNT)
self.info("Setting up tunneling on %s ports %d-%d "
"using PKCS12 %r", host, port_range[0],
port_range[-1], p12)
csec = security.ClientContextFactory(p12_filename=p12,
verify_ca_from_p12=True)
cpol = security.ClientPolicy(csec)
ssec = security.ServerContextFactory(p12_filename=p12,
verify_ca_from_p12=True,
enforce_cert=True)
spol = security.ServerPolicy(ssec)
backend = tunneling.Backend(host, port_range,
client_security_policy=cpol,
server_security_policy=spol)
frontend = tunneling.Tunneling(backend)
return frontend
except Exception as e:
msg = "Failed to setup tunneling backend"
error.handle_exception(self, e, msg)
return None
def _side_effect_wrapper(callable, args, kwargs, name):
section_state = fiber.get_state()
if section_state is not None:
# We are in a woven section
entry = section_state.get(JOURNAL_ENTRY_TAG, None)
if entry is not None:
# We are in a replayable section
mode = section_state.get(RECMODE_TAG, None)
if mode == JournalMode.replay:
return entry.next_side_effect(name, *args, **kwargs)
# Create a side-effect entry
effect = entry.new_side_effect(name, *args, **kwargs)
# Keep it in the replayable section state
section_state[SIDE_EFFECT_TAG] = effect
# Break the fiber to allow new replayable sections
fiber.break_fiber()
# Keep the side-effect entry to detect we are in one
fiber.set_stack_var(SIDE_EFFECT_TAG, effect)
try:
result = callable(*args, **kwargs)
result = _check_side_effet_result(result, name)
effect.set_result(result)
effect.commit()
return result
except Exception, e:
#FIXME: handle exceptions in side effects properly
error.handle_exception(None, e,
"Exception raised by side-effect %s",
reflect.canonical_name(callable))
raise
def _create_gateway(self, gconfig):
assert isinstance(gconfig, config.GatewayConfig), str(type(gconfig))
try:
port = int(gconfig.port)
p12 = gconfig.p12
allow_tcp = gconfig.allow_tcp
range = (port, port + GATEWAY_PORT_COUNT)
if not os.path.exists(p12):
if not allow_tcp:
self.warning("No gateway PKCS12 specified or file "
"not found, gateway disabled: %s", p12)
return
sec = security.UnsecuredPolicy()
self.info("Setting up TCP gateway on ports %d-%d",
range[0], range[-1])
else:
fac = security.ServerContextFactory(p12_filename=p12,
verify_ca_from_p12=True,
enforce_cert=True)
sec = security.ServerPolicy(fac)
self.info("Setting up SSL gateway on ports %d-%d "
"using PKCS12 %r", range[0], range[-1], p12)
return gateway.Gateway(self, range, hostname=self.get_hostname(),
security_policy=sec, log_keeper=self)
except Exception as e:
error.handle_exception(self, e, "Failed to setup gateway")
def _initiate_tunneling(self, config):
try:
host = config["host"]
port = int(config["port"])
p12 = config["p12"]
port_range = range(port, port + TUNNELING_PORT_COUNT)
self.info("Setting up tunneling on %s ports %d-%d "
"using PKCS12 %r", host, port_range[0],
port_range[-1], p12)
csec = security.ClientContextFactory(p12_filename=p12,
verify_ca_from_p12=True)
cpol = security.ClientPolicy(csec)
ssec = security.ServerContextFactory(p12_filename=p12,
verify_ca_from_p12=True)
spol = security.ServerPolicy(ssec)
backend = tunneling.Backend(host, port_range,
client_security_policy=cpol,
server_security_policy=spol)
backend.redirect_log(self)
frontend = tunneling.Tunneling(backend)
return frontend
except Exception as e:
msg = "Failed to setup tunneling backend"
error.handle_exception(self, e, msg)
return None
def on_become_master(self):
self._ssh.start_listening()
self._journaler.set_connection_strings(
self.config.agency.journal)
try:
self._start_master_gateway()
except Exception as e:
error.handle_exception(
self, e, "Failed setting up gateway, it will stay disabled.")
self._redirect_text_log()
self._create_pid_file()
self._link_log_file(options.MASTER_LOG_LINK)
signal.signal(signal.SIGUSR1, self._sigusr1_handler)
signal.signal(signal.SIGUSR2, self._sigusr2_handler)
backends = []
backends.append(self._initiate_messaging(self.config.msg))
backends.append(self._initiate_tunneling(self.config.tunnel))
backends.append(unix.Master(self._broker))
backends = filter(None, backends)
d = defer.succeed(None)
for backend in backends:
d.addCallback(defer.drop_param,
self._messaging.add_backend, backend)
if (self.config.agency.enable_spawning_slave
and sys.platform != "win32"):
d.addCallback(defer.drop_param, self._spawn_backup_agency)
d.addCallback(defer.drop_param, self._start_host_agent)
return d
def solve(connection, doc_id):
connection.info('Solving conflicts for document: %s', doc_id)
plain_doc = yield connection.get_document(doc_id, raw=True,
conflicts=True)
if '_conflicts' not in plain_doc:
connection.debug('Document:%s is not in state conflict, aborting.',
doc_id)
return
doc = connection._unserializer.convert(plain_doc)
if not IDocument.providedBy(doc):
handler = _solve_alert
else:
strategy_handlers = {
ConflictResolutionStrategy.db_winner: _solve_db_winner,
ConflictResolutionStrategy.alert: _solve_alert,
ConflictResolutionStrategy.merge: _solve_merge}
s = type(doc).conflict_resolution_strategy
handler = strategy_handlers.get(s, _solve_alert)
connection.debug("Using %s strategy", handler.__name__)
try:
yield handler(connection, doc, plain_doc['_conflicts'])
connection.debug("Solving conflict for document %s completed", doc_id)
except UnsolvableConflict:
raise
except Exception as e:
error.handle_exception(None, e, "Failed solving conflict")
raise UnsolvableConflict(str(e), doc)
def _create_gateway(self, config):
try:
port = int(config["port"])
p12 = config["p12"]
allow_tcp = config["allow_tcp"]
range = (port, port + GATEWAY_PORT_COUNT)
if not os.path.exists(p12):
if not allow_tcp:
self.warning("No gateway PKCS12 specified or file "
"not found, gateway disabled: %s", p12)
return
sec = security.UnsecuredPolicy()
self.info("Setting up TCP gateway on ports %d-%d",
range[0], range[-1])
else:
fac = security.ServerContextFactory(p12_filename=p12,
verify_ca_from_p12=True)
sec = security.ServerPolicy(fac)
self.info("Setting up SSL gateway on ports %d-%d "
"using PKCS12 %r", range[0], range[-1], p12)
return gateway.Gateway(self, range, security_policy=sec)
except Exception as e:
error.handle_exception(self, e, "Failed to setup gateway")
def apply(self):
try:
if self.agent_id != self._replay.agent_id:
raise ReplayError(
"Tried to apply the entry belonging to the "
"agent id: %r, but the Replay instance "
"belogs to: %r" % (self.agent_id, self._replay.agent_id)
)
self._replay.set_current_time(self._timestamp)
if self.journal_id == "agency":
self._replay.replay_agency_entry(self)
return self
self._replay._log_entry(self)
self._replay.require_agent()
instance = self._replay.registry.get(self.journal_id, None)
if instance is None:
raise ReplayError(
"Instance for journal_id %r not found "
"in the registry when replaying %r" % (self.journal_id, self.function_id)
)
result = instance.replay(self)
if self._next_effect < len(self._side_effects):
remaining = self._side_effects[self._next_effect]
side_effect = self.restore_side_effect(remaining, parse_args=True)
function_id, args, kwargs, _effects, _result = side_effect
se_desc = side_effect_as_string(function_id, args, kwargs)
raise ReplayError("Function %s did not consume side-effect %s" % (self.function_id, se_desc))
frozen_result = self._replay.serializer.freeze(result)
unfrozen_result = self._replay.unserializer.convert(frozen_result)
expected = self._replay.unserializer.convert(self.frozen_result)
if unfrozen_result != expected:
res = pformat(unfrozen_result)
exp = pformat(expected)
diffs = text_helper.format_diff(exp, res, "\n ")
raise ReplayError(
"Function %r replay result "
"does not match recorded one.\n"
" RESULT: %s\n"
" EXPECTED: %s\n"
" DIFFERENCES: %s\n" % (self.function_id, res, exp, diffs)
)
self._replay.log("State after the entry: %r", self._replay.agent._get_state())
return self
except Exception as e:
error.handle_exception(
"replay", e, "Failed trying to apply instance %r entry %r: ", self.journal_id, self.function_id
)
raise
def _finish(self):
try:
if self._cache is not None:
data = self._cache.getvalue()
self._cache = None
self.prepare()
self._request._ref.write(self._encode(data))
except Exception, e:
msg = "Exception during response finalization"
error.handle_exception(self, e, msg)
def _update_xdot(self, model, graph):
rect = self._xdot.get_allocation()
graph.obj_dict["attributes"]["ratio"] = float(rect.height) / rect.width
self._graph = graph
try:
dotcode = graph.to_string()
except Exception as e:
error.handle_exception(None, e, "Failed to generate xdot")
else:
self._xdot.set_dotcode(dotcode)
if self._xdot.graph.width:
self._xdot.zoom_to_fit()
def unload(name):
log.info("application", "Starting unloading application %r", name)
r = get_application_registry()
application = r.lookup(name)
if not application:
log.error("application", "Tried to unload application which is not " "loaded: %r", name)
return
try:
application.unload()
except Exception as e:
error.handle_exception("application", e, "Problem while unloading " "application %r", name)
log.info("application", "Unloading application %r complete", name)
def testHandleException(self):
xlog.setDebug('4')
try:
do_raise()
except Error as e:
error.handle_exception(self.logger, e, "Error handler:")
self.assertEqual(1, len(self.keeper.errors))
self.assertEqual(2, len(self.keeper.errors[0][1]))
traceback = self.keeper.errors[0][1][1]
self.assertIn(
'feat/test/test_common_error.py',
traceback)
def do_import(self, iter, force=False):
canonical_name, auto = self._parse_row(iter)
if force or auto:
try:
o = reflect.named_object(canonical_name)
if IApplication.providedBy(o):
o.load()
elif isinstance(o, types.ModuleType):
reflect.named_module(canonical_name)
else:
raise TypeError("Uknown type of canonical name target: "
"%r -> %s" % (canonical_name, type(o)))
except Exception, e:
error.handle_exception('imports', e, 'Error importing')
def _initiate_messaging(self, mconfig):
assert isinstance(mconfig, config.MsgConfig), str(type(mconfig))
try:
host = mconfig.host
port = int(mconfig.port)
username = mconfig.user
password = mconfig.password
self.info("Setting up messaging using %s@%s:%d", username, host, port)
backend = net.RabbitMQ(host, port, username, password)
client = rabbitmq.Client(backend, self.get_hostname())
return client
except Exception as e:
msg = "Failed to setup messaging backend"
error.handle_exception(self, e, msg)
# For now we do not support not having messaging backend
raise
def _initiate_messaging(self, config):
try:
host = config['host']
port = int(config['port'])
username = config['user']
password = config['password']
self.info("Setting up messaging using %s@%s:%d", username,
host, port)
backend = messaging.Messaging(host, port, username, password)
backend.redirect_log(self)
return backend
except Exception as e:
msg = "Failed to setup messaging backend"
error.handle_exception(self, e, msg)
# For now we do not support not having messaging backend
raise
def validate_html(self):
try:
if os.environ['SELENIUM_SKIP_HTML_VALIDATION']:
return
except KeyError:
pass
url = os.environ.get("SELENIUM_VALIDATOR", 'validator.w3.org')
validator = httpclient.Connection(url, 80, logger=self)
self.addCleanup(validator.disconnect)
source = self.browser.page_source
# browser returns the result as ISO-8859-1 encoded, but it's later
# interpreted as unicode. Here I just remove all the nonascii
# characters from the input, I didn't find the better way to deal
# with this.
source = "".join(x for x in source if ord(x) < 128)
datagen, headers = encode.multipart_encode({
'fragment': source,
'charset': '(detect automatically)',
'group': 0,
'ss': 1,
'user-agent': 'W3C_Validator/1.3',
'doctype': 'inline'})
body = "".join(datagen)
# HttpConnection for some reason uses lowercase headers
headers = dict((k.lower(), v) for k, v in headers.iteritems())
self.info("Validating html. Posting to %s/check", validator._host)
try:
response = yield validator.request(
http.Methods.POST, '/check', headers, body)
except Exception as e:
error.handle_exception(self, e, "Failed posting to validator")
self.fail("Failed posting to validator")
errors = response.headers.get('x-w3c-validator-errors')
if errors != '0':
html_name = '%s.html' % (self.browser.title, )
with open(html_name, 'w') as f:
f.write(response.body)
self.fail("Failing because of invalid html. "
"Saved validator output to %s\n" % (html_name, ))
def migration_script(connection):
log.info("script", "Running the migration script.")
index = yield connection.query_view(view.DocumentByType,
group_level=2, parse_result=False)
try:
for (type_name, version), count in index:
restorator = serialization.lookup(type_name)
if not restorator:
log.error(
'script', "Failed to lookup the restorator for the "
"type name: %s. There is %d objects like this in the"
" database. They will not be migrated.", type_name,
count)
if (IVersionAdapter.providedBy(restorator) and
((version is None and restorator.version > 1) or
(version is not None and version < restorator.version))):
log.info('script', "I will migrate %d documents of the "
"type: %s from version %s to %d", count,
type_name, version, restorator.version)
migrated = 0
while migrated < count:
fetched = yield connection.query_view(
view.DocumentByType,
key=(type_name, version),
limit=15,
reduce=False,
include_docs=True)
migrated += len(fetched)
if not fetched:
break
log.info("script", "Migrated %d documents of the type %s "
"from %s version to %s", migrated, type_name,
version, restorator.version)
except Exception:
error.handle_exception("script", None,
"Failed running migration script")
raise
def _emergency_termination(self, failure, request, response):
try:
msg = "Unrecovered Failure During Web Request"
error.handle_failure(self, failure, msg)
if response.can_update_headers:
response.set_header("content-type", "text/plain")
response.write("Error: %s" % failure.getErrorMessage())
if failure.check(http.HTTPError):
return self._terminate(request, response, failure.value.status_code)
else:
return self._terminate(request, response)
except Exception, e:
msg = "Exception during emergency termination"
error.handle_exception(self, e, msg)
# We don't call _terminate() here, we already too deep in the mess
return None
def terminate_agents(self):
self._agency = self.model.view
self._agency._starting_host = True
application = self.model.source
agent_ids = []
for medium in list(self._agency.iter_agents()):
if medium.agent.application != application:
self._agency.info(
"Leaving in peace the agent %s, he belongs to application"
" %s", medium.get_agent_type(),
medium.agent.application.name)
continue
a_id = medium.get_agent_id()
agent_ids.append(a_id)
self._agency.info("Terminating %s with id: %s",
medium.get_agent_type(), a_id)
try:
yield medium.terminate_hard()
except Exception as e:
error.handle_exception('restart', e, "Error termination.")
defer.returnValue(agent_ids)
def wrapped(*args, **kwargs):
noncritical = kwargs.pop('noncritical', False)
self.logex(5, "%s call: %s, args=%r, kwargs=%r",
(self.name, unwrapped.__name__, args, kwargs),
depth=-3)
try:
if self._explicit_wait is None:
return self._wrap_call(unwrapped, *args, **kwargs)
else:
return self._wrap_call(explicitly_wait,
unwrapped, args, kwargs,
timeout=self._explicit_wait)
except Exception as e:
error.handle_exception(
self, e,
"%s call failed, name: %s, args=%r, kwargs=%r",
self.name, unwrapped.__name__, args, kwargs)
self.on_error(e)
if not noncritical:
raise
else:
self.info("Test will continue, as the call was done "
"with noncritical=True")
def _remove_file(self, path):
try:
os.unlink(path)
except Exception as e:
error.handle_exception(self, e, 'Failed to remove file: %s', path)
def _recorded_call(self, fun_id, function, args, kwargs, reentrant=True):
# Starts the fiber section
section = fiber.WovenSection()
section.enter()
fibdesc = section.descriptor
# Check if we are in replay mode
mode = section.state.get(RECMODE_TAG, None)
if mode == JournalMode.replay:
fun_id, function = self._resolve_function(fun_id, function)
return self._call_fun(fun_id, function, args, kwargs)
# Check if this is the first recording in the fiber section
recording = section.state.get(RECORDING_TAG, None)
section_first = recording is None
result = None
try:
entry = section.state.get(JOURNAL_ENTRY_TAG, None)
mode = section.state.get(RECMODE_TAG, None)
fiber_first = section_first and section.descriptor.fiber_depth == 0
fun_id, function = self._resolve_function(fun_id, function)
if section_first:
entry = self.journal_keeper.new_entry(self.journal_id, fun_id,
*args, **kwargs)
entry.set_fiber_context(fibdesc.fiber_id, fibdesc.fiber_depth)
section.state[RECORDING_TAG] = True
section.state[RECMODE_TAG] = JournalMode.recording
section.state[JOURNAL_ENTRY_TAG] = entry
if not (fiber_first or reentrant):
# If not reentrant and it is not the first, it's BAAAAAD.
raise ReentrantCallError("Recorded functions %s cannot be "
"called from inside the recording "
"section" % (fun_id, ))
result = self._call_fun(fun_id, function, args, kwargs)
except Exception as e:
if not section_first:
raise
result = fiber.fail(e)
error.handle_exception(self, e, "Exception inside recorded "
"function %s", fun_id)
finally:
if section_first:
entry.set_result(result)
entry.commit()
result = entry.get_result()
section.state[RECORDING_TAG] = None
section.state[JOURNAL_ENTRY_TAG] = None
section.state[RECMODE_TAG] = None
return section.exit(result)
def _prepare_error(self, exception, request, response):
if isinstance(exception, http.NotAuthorizedError):
if response.can_update_headers:
challenge = exception.challenge
if challenge:
header = challenge.header_value
response.set_header("WWW-Authenticate", header)
response.set_status(http.Status.UNAUTHORIZED)
elif isinstance(exception, http.NotAcceptableError):
if response.can_update_headers:
# Add NON-STANDARD headers to the response
if exception.allowed_mime_types:
allowed = ", ".join(exception.allowed_mime_types)
response.set_header("Allow-Type", allowed)
if exception.allowed_encodings:
allowed = ", ".join(exception.allowed_encodings)
response.set_header("Allow-Charset", allowed)
if exception.allowed_languages:
allowed = ", ".join(exception.allowed_languages)
response.set_header("Allow-Language", allowed)
response.set_status(http.Status.NOT_ACCEPTABLE)
elif isinstance(exception, http.NotAllowedError):
if response.can_update_headers:
value = ", ".join([m.name for m in exception.allowed_methods])
response.set_header("Allow", value)
response.set_status(http.Status.NOT_ALLOWED)
elif isinstance(exception, http.MovedPermanently):
if response.can_update_headers:
response.set_header("Location", exception.location)
response.set_status(http.Status.MOVED_PERMANENTLY)
response.set_header("Cache-Control", "no-store")
response.set_header("connection", "close")
return None
elif isinstance(exception, http.HTTPError):
if response.can_update_headers:
response.set_status(exception.status_code)
if not exception.status_code.is_error():
# Not a real error, so we terminate
return None
elif isinstance(exception, UnicodeEncodeError):
# We failed to encode data in the response selected charset
# As for HTTP/1.1 we should set the accepted characteristics,
# but it would be hard at this point given we don't know what
# triggered this exception.
msg = "Failed to encode response to accepted charset"
error.handle_exception(self, exception, msg)
if response.can_update_headers:
response.set_status(http.Status.NOT_ACCEPTABLE)
else:
msg = "Exception during HTTP resource rendering"
error.handle_exception(self, exception, msg)
if response.can_update_headers:
response.set_status(http.Status.INTERNAL_SERVER_ERROR)
return exception
