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Refactor HomeserverConfig so it can be typechecked (#6137)

This commit is contained in:
Amber Brown 2019-10-10 09:39:35 +01:00 committed by GitHub
parent def5413480
commit f743108a94
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37 changed files with 415 additions and 94 deletions
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1
changelog.d/6137.misc Normal file
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@ -0,0 +1 @@
Refactor configuration loading to allow better typechecking.

16
mypy.ini
View File

@ -4,10 +4,6 @@ plugins=mypy_zope:plugin
follow_imports=skip
mypy_path=stubs
[mypy-synapse.config.homeserver]
# this is a mess because of the metaclass shenanigans
ignore_errors = True
[mypy-zope]
ignore_missing_imports = True
@ -52,3 +48,15 @@ ignore_missing_imports = True
[mypy-signedjson.*]
ignore_missing_imports = True
[mypy-prometheus_client.*]
ignore_missing_imports = True
[mypy-service_identity.*]
ignore_missing_imports = True
[mypy-daemonize]
ignore_missing_imports = True
[mypy-sentry_sdk]
ignore_missing_imports = True

191
synapse/config/_base.py
View File

@ -18,7 +18,9 @@
import argparse
import errno
import os
from collections import OrderedDict
from textwrap import dedent
from typing import Any, MutableMapping, Optional
from six import integer_types
@ -51,7 +53,56 @@ Missing mandatory `server_name` config option.
"""
def path_exists(file_path):
"""Check if a file exists
Unlike os.path.exists, this throws an exception if there is an error
checking if the file exists (for example, if there is a perms error on
the parent dir).
Returns:
bool: True if the file exists; False if not.
"""
try:
os.stat(file_path)
return True
except OSError as e:
if e.errno != errno.ENOENT:
raise e
return False
class Config(object):
"""
A configuration section, containing configuration keys and values.
Attributes:
section (str): The section title of this config object, such as
"tls" or "logger". This is used to refer to it on the root
logger (for example, `config.tls.some_option`). Must be
defined in subclasses.
"""
section = None
def __init__(self, root_config=None):
self.root = root_config
def __getattr__(self, item: str) -> Any:
"""
Try and fetch a configuration option that does not exist on this class.
This is so that existing configs that rely on `self.value`, where value
is actually from a different config section, continue to work.
"""
if item in ["generate_config_section", "read_config"]:
raise AttributeError(item)
if self.root is None:
raise AttributeError(item)
else:
return self.root._get_unclassed_config(self.section, item)
@staticmethod
def parse_size(value):
if isinstance(value, integer_types):
@ -88,22 +139,7 @@ class Config(object):
@classmethod
def path_exists(cls, file_path):
"""Check if a file exists
Unlike os.path.exists, this throws an exception if there is an error
checking if the file exists (for example, if there is a perms error on
the parent dir).
Returns:
bool: True if the file exists; False if not.
"""
try:
os.stat(file_path)
return True
except OSError as e:
if e.errno != errno.ENOENT:
raise e
return False
return path_exists(file_path)
@classmethod
def check_file(cls, file_path, config_name):
@ -136,42 +172,106 @@ class Config(object):
with open(file_path) as file_stream:
return file_stream.read()
def invoke_all(self, name, *args, **kargs):
"""Invoke all instance methods with the given name and arguments in the
class's MRO.
class RootConfig(object):
"""
Holder of an application's configuration.
What configuration this object holds is defined by `config_classes`, a list
of Config classes that will be instantiated and given the contents of a
configuration file to read. They can then be accessed on this class by their
section name, defined in the Config or dynamically set to be the name of the
class, lower-cased and with "Config" removed.
"""
config_classes = []
def __init__(self):
self._configs = OrderedDict()
for config_class in self.config_classes:
if config_class.section is None:
raise ValueError("%r requires a section name" % (config_class,))
try:
conf = config_class(self)
except Exception as e:
raise Exception("Failed making %s: %r" % (config_class.section, e))
self._configs[config_class.section] = conf
def __getattr__(self, item: str) -> Any:
"""
Redirect lookups on this object either to config objects, or values on
config objects, so that `config.tls.blah` works, as well as legacy uses
of things like `config.server_name`. It will first look up the config
section name, and then values on those config classes.
"""
if item in self._configs.keys():
return self._configs[item]
return self._get_unclassed_config(None, item)
def _get_unclassed_config(self, asking_section: Optional[str], item: str):
"""
Fetch a config value from one of the instantiated config classes that
has not been fetched directly.
Args:
name (str): Name of function to invoke
asking_section: If this check is coming from a Config child, which
one? This section will not be asked if it has the value.
item: The configuration value key.
Raises:
AttributeError if no config classes have the config key. The body
will contain what sections were checked.
"""
for key, val in self._configs.items():
if key == asking_section:
continue
if item in dir(val):
return getattr(val, item)
raise AttributeError(item, "not found in %s" % (list(self._configs.keys()),))
def invoke_all(self, func_name: str, *args, **kwargs) -> MutableMapping[str, Any]:
"""
Invoke a function on all instantiated config objects this RootConfig is
configured to use.
Args:
func_name: Name of function to invoke
*args
**kwargs
Returns:
list: The list of the return values from each method called
ordered dictionary of config section name and the result of the
function from it.
"""
results = []
for cls in type(self).mro():
if name in cls.__dict__:
results.append(getattr(cls, name)(self, *args, **kargs))
return results
res = OrderedDict()
for name, config in self._configs.items():
if hasattr(config, func_name):
res[name] = getattr(config, func_name)(*args, **kwargs)
return res
@classmethod
def invoke_all_static(cls, name, *args, **kargs):
"""Invoke all static methods with the given name and arguments in the
class's MRO.
def invoke_all_static(cls, func_name: str, *args, **kwargs):
"""
Invoke a static function on config objects this RootConfig is
configured to use.
Args:
name (str): Name of function to invoke
func_name: Name of function to invoke
*args
**kwargs
Returns:
list: The list of the return values from each method called
ordered dictionary of config section name and the result of the
function from it.
"""
results = []
for c in cls.mro():
if name in c.__dict__:
results.append(getattr(c, name)(*args, **kargs))
return results
for config in cls.config_classes:
if hasattr(config, func_name):
getattr(config, func_name)(*args, **kwargs)
def generate_config(
self,
@ -187,7 +287,8 @@ class Config(object):
tls_private_key_path=None,
acme_domain=None,
):
"""Build a default configuration file
"""
Build a default configuration file
This is used when the user explicitly asks us to generate a config file
(eg with --generate_config).
@ -242,6 +343,7 @@ class Config(object):
Returns:
str: the yaml config file
"""
return "\n\n".join(
dedent(conf)
for conf in self.invoke_all(
@ -257,7 +359,7 @@ class Config(object):
tls_certificate_path=tls_certificate_path,
tls_private_key_path=tls_private_key_path,
acme_domain=acme_domain,
)
).values()
)
@classmethod
@ -444,7 +546,7 @@ class Config(object):
)
(config_path,) = config_files
if not cls.path_exists(config_path):
if not path_exists(config_path):
print("Generating config file %s" % (config_path,))
if config_args.data_directory:
@ -469,7 +571,7 @@ class Config(object):
open_private_ports=config_args.open_private_ports,
)
if not cls.path_exists(config_dir_path):
if not path_exists(config_dir_path):
os.makedirs(config_dir_path)
with open(config_path, "w") as config_file:
config_file.write("# vim:ft=yaml\n\n")
@ -518,7 +620,7 @@ class Config(object):
return obj
def parse_config_dict(self, config_dict, config_dir_path, data_dir_path):
def parse_config_dict(self, config_dict, config_dir_path=None, data_dir_path=None):
"""Read the information from the config dict into this Config object.
Args:
@ -607,3 +709,6 @@ def find_config_files(search_paths):
else:
config_files.append(config_path)
return config_files
__all__ = ["Config", "RootConfig"]

135
synapse/config/_base.pyi Normal file
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@ -0,0 +1,135 @@
from typing import Any, List, Optional
from synapse.config import (
api,
appservice,
captcha,
cas,
consent_config,
database,
emailconfig,
groups,
jwt_config,
key,
logger,
metrics,
password,
password_auth_providers,
push,
ratelimiting,
registration,
repository,
room_directory,
saml2_config,
server,
server_notices_config,
spam_checker,
stats,
third_party_event_rules,
tls,
tracer,
user_directory,
voip,
workers,
)
class ConfigError(Exception): ...
MISSING_REPORT_STATS_CONFIG_INSTRUCTIONS: str
MISSING_REPORT_STATS_SPIEL: str
MISSING_SERVER_NAME: str
def path_exists(file_path: str): ...
class RootConfig:
server: server.ServerConfig
tls: tls.TlsConfig
database: database.DatabaseConfig
logging: logger.LoggingConfig
ratelimit: ratelimiting.RatelimitConfig
media: repository.ContentRepositoryConfig
captcha: captcha.CaptchaConfig
voip: voip.VoipConfig
registration: registration.RegistrationConfig
metrics: metrics.MetricsConfig
api: api.ApiConfig
appservice: appservice.AppServiceConfig
key: key.KeyConfig
saml2: saml2_config.SAML2Config
cas: cas.CasConfig
jwt: jwt_config.JWTConfig
password: password.PasswordConfig
email: emailconfig.EmailConfig
worker: workers.WorkerConfig
authproviders: password_auth_providers.PasswordAuthProviderConfig
push: push.PushConfig
spamchecker: spam_checker.SpamCheckerConfig
groups: groups.GroupsConfig
userdirectory: user_directory.UserDirectoryConfig
consent: consent_config.ConsentConfig
stats: stats.StatsConfig
servernotices: server_notices_config.ServerNoticesConfig
roomdirectory: room_directory.RoomDirectoryConfig
thirdpartyrules: third_party_event_rules.ThirdPartyRulesConfig
tracer: tracer.TracerConfig
config_classes: List = ...
def __init__(self) -> None: ...
def invoke_all(self, func_name: str, *args: Any, **kwargs: Any): ...
@classmethod
def invoke_all_static(cls, func_name: str, *args: Any, **kwargs: Any) -> None: ...
def __getattr__(self, item: str): ...
def parse_config_dict(
self,
config_dict: Any,
config_dir_path: Optional[Any] = ...,
data_dir_path: Optional[Any] = ...,
) -> None: ...
read_config: Any = ...
def generate_config(
self,
config_dir_path: str,
data_dir_path: str,
server_name: str,
generate_secrets: bool = ...,
report_stats: Optional[str] = ...,
open_private_ports: bool = ...,
listeners: Optional[Any] = ...,
database_conf: Optional[Any] = ...,
tls_certificate_path: Optional[str] = ...,
tls_private_key_path: Optional[str] = ...,
acme_domain: Optional[str] = ...,
): ...
@classmethod
def load_or_generate_config(cls, description: Any, argv: Any): ...
@classmethod
def load_config(cls, description: Any, argv: Any): ...
@classmethod
def add_arguments_to_parser(cls, config_parser: Any) -> None: ...
@classmethod
def load_config_with_parser(cls, parser: Any, argv: Any): ...
def generate_missing_files(
self, config_dict: dict, config_dir_path: str
) -> None: ...
class Config:
root: RootConfig
def __init__(self, root_config: Optional[RootConfig] = ...) -> None: ...
def __getattr__(self, item: str, from_root: bool = ...): ...
@staticmethod
def parse_size(value: Any): ...
@staticmethod
def parse_duration(value: Any): ...
@staticmethod
def abspath(file_path: Optional[str]): ...
@classmethod
def path_exists(cls, file_path: str): ...
@classmethod
def check_file(cls, file_path: str, config_name: str): ...
@classmethod
def ensure_directory(cls, dir_path: str): ...
@classmethod
def read_file(cls, file_path: str, config_name: str): ...
def read_config_files(config_files: List[str]): ...
def find_config_files(search_paths: List[str]): ...

2
synapse/config/api.py
View File

@ -18,6 +18,8 @@ from ._base import Config
class ApiConfig(Config):
section = "api"
def read_config(self, config, **kwargs):
self.room_invite_state_types = config.get(
"room_invite_state_types",

2
synapse/config/appservice.py
View File

@ -30,6 +30,8 @@ logger = logging.getLogger(__name__)
class AppServiceConfig(Config):
section = "appservice"
def read_config(self, config, **kwargs):
self.app_service_config_files = config.get("app_service_config_files", [])
self.notify_appservices = config.get("notify_appservices", True)

2
synapse/config/captcha.py
View File

@ -16,6 +16,8 @@ from ._base import Config
class CaptchaConfig(Config):
section = "captcha"
def read_config(self, config, **kwargs):
self.recaptcha_private_key = config.get("recaptcha_private_key")
self.recaptcha_public_key = config.get("recaptcha_public_key")

2
synapse/config/cas.py
View File

@ -22,6 +22,8 @@ class CasConfig(Config):
cas_server_url: URL of CAS server
"""
section = "cas"
def read_config(self, config, **kwargs):
cas_config = config.get("cas_config", None)
if cas_config:

3
synapse/config/consent_config.py
View File

@ -73,6 +73,9 @@ DEFAULT_CONFIG = """\
class ConsentConfig(Config):
section = "consent"
def __init__(self, *args):
super(ConsentConfig, self).__init__(*args)

2
synapse/config/database.py
View File

@ -21,6 +21,8 @@ from ._base import Config
class DatabaseConfig(Config):
section = "database"
def read_config(self, config, **kwargs):
self.event_cache_size = self.parse_size(config.get("event_cache_size", "10K"))

2
synapse/config/emailconfig.py
View File

@ -28,6 +28,8 @@ from ._base import Config, ConfigError
class EmailConfig(Config):
section = "email"
def read_config(self, config, **kwargs):
# TODO: We should separate better the email configuration from the notification
# and account validity config.

2
synapse/config/groups.py
View File

@ -17,6 +17,8 @@ from ._base import Config
class GroupsConfig(Config):
section = "groups"
def read_config(self, config, **kwargs):
self.enable_group_creation = config.get("enable_group_creation", False)
self.group_creation_prefix = config.get("group_creation_prefix", "")

8
synapse/config/homeserver.py
View File

@ -14,6 +14,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from ._base import RootConfig
from .api import ApiConfig
from .appservice import AppServiceConfig
from .captcha import CaptchaConfig
@ -46,7 +47,9 @@ from .voip import VoipConfig
from .workers import WorkerConfig
class HomeServerConfig(
class HomeServerConfig(RootConfig):
config_classes = [
ServerConfig,
TlsConfig,
DatabaseConfig,
@ -77,5 +80,4 @@ class HomeServerConfig(
RoomDirectoryConfig,
ThirdPartyRulesConfig,
TracerConfig,
):
pass
]

2
synapse/config/jwt_config.py
View File

@ -23,6 +23,8 @@ MISSING_JWT = """Missing jwt library. This is required for jwt login.
class JWTConfig(Config):
section = "jwt"
def read_config(self, config, **kwargs):
jwt_config = config.get("jwt_config", None)
if jwt_config:

2
synapse/config/key.py
View File

@ -92,6 +92,8 @@ class TrustedKeyServer(object):
class KeyConfig(Config):
section = "key"
def read_config(self, config, config_dir_path, **kwargs):
# the signing key can be specified inline or in a separate file
if "signing_key" in config:

2
synapse/config/logger.py
View File

@ -84,6 +84,8 @@ root:
class LoggingConfig(Config):
section = "logging"
def read_config(self, config, **kwargs):
self.log_config = self.abspath(config.get("log_config"))
self.no_redirect_stdio = config.get("no_redirect_stdio", False)

2
synapse/config/metrics.py
View File

@ -34,6 +34,8 @@ class MetricsFlags(object):
class MetricsConfig(Config):
section = "metrics"
def read_config(self, config, **kwargs):
self.enable_metrics = config.get("enable_metrics", False)
self.report_stats = config.get("report_stats", None)

2
synapse/config/password.py
View File

@ -20,6 +20,8 @@ class PasswordConfig(Config):
"""Password login configuration
"""
section = "password"
def read_config(self, config, **kwargs):
password_config = config.get("password_config", {})
if password_config is None:

2
synapse/config/password_auth_providers.py
View File

@ -23,6 +23,8 @@ LDAP_PROVIDER = "ldap_auth_provider.LdapAuthProvider"
class PasswordAuthProviderConfig(Config):
section = "authproviders"
def read_config(self, config, **kwargs):
self.password_providers = [] # type: List[Any]
providers = []

2
synapse/config/push.py
View File

@ -18,6 +18,8 @@ from ._base import Config
class PushConfig(Config):
section = "push"
def read_config(self, config, **kwargs):
push_config = config.get("push", {})
self.push_include_content = push_config.get("include_content", True)

2
synapse/config/ratelimiting.py
View File

@ -36,6 +36,8 @@ class FederationRateLimitConfig(object):
class RatelimitConfig(Config):
section = "ratelimiting"
def read_config(self, config, **kwargs):
# Load the new-style messages config if it exists. Otherwise fall back

4
synapse/config/registration.py
View File

@ -24,6 +24,8 @@ from synapse.util.stringutils import random_string_with_symbols
class AccountValidityConfig(Config):
section = "accountvalidity"
def __init__(self, config, synapse_config):
self.enabled = config.get("enabled", False)
self.renew_by_email_enabled = "renew_at" in config
@ -77,6 +79,8 @@ class AccountValidityConfig(Config):
class RegistrationConfig(Config):
section = "registration"
def read_config(self, config, **kwargs):
self.enable_registration = bool(
strtobool(str(config.get("enable_registration", False)))

2
synapse/config/repository.py
View File

@ -78,6 +78,8 @@ def parse_thumbnail_requirements(thumbnail_sizes):
class ContentRepositoryConfig(Config):
section = "media"
def read_config(self, config, **kwargs):
# Only enable the media repo if either the media repo is enabled or the

2
synapse/config/room_directory.py
View File

@ -19,6 +19,8 @@ from ._base import Config, ConfigError
class RoomDirectoryConfig(Config):
section = "roomdirectory"
def read_config(self, config, **kwargs):
self.enable_room_list_search = config.get("enable_room_list_search", True)

2
synapse/config/saml2_config.py
View File

@ -55,6 +55,8 @@ def _dict_merge(merge_dict, into_dict):
class SAML2Config(Config):
section = "saml2"
def read_config(self, config, **kwargs):
self.saml2_enabled = False

2
synapse/config/server.py
View File

@ -58,6 +58,8 @@ on how to configure the new listener.
class ServerConfig(Config):
section = "server"
def read_config(self, config, **kwargs):
self.server_name = config["server_name"]
self.server_context = config.get("server_context", None)

2
synapse/config/server_notices_config.py
View File

@ -59,6 +59,8 @@ class ServerNoticesConfig(Config):
None if server notices are not enabled.
"""
section = "servernotices"
def __init__(self, *args):
super(ServerNoticesConfig, self).__init__(*args)
self.server_notices_mxid = None

2
synapse/config/spam_checker.py
View File

@ -19,6 +19,8 @@ from ._base import Config
class SpamCheckerConfig(Config):
section = "spamchecker"
def read_config(self, config, **kwargs):
self.spam_checker = None

2
synapse/config/stats.py
View File

@ -25,6 +25,8 @@ class StatsConfig(Config):
Configuration for the behaviour of synapse's stats engine
"""
section = "stats"
def read_config(self, config, **kwargs):
self.stats_enabled = True
self.stats_bucket_size = 86400 * 1000

2
synapse/config/third_party_event_rules.py
View File

@ -19,6 +19,8 @@ from ._base import Config
class ThirdPartyRulesConfig(Config):
section = "thirdpartyrules"
def read_config(self, config, **kwargs):
self.third_party_event_rules = None

9
synapse/config/tls.py
View File

@ -18,6 +18,7 @@ import os
import warnings
from datetime import datetime
from hashlib import sha256
from typing import List
import six
@ -33,7 +34,9 @@ logger = logging.getLogger(__name__)
class TlsConfig(Config):
def read_config(self, config, config_dir_path, **kwargs):
section = "tls"
def read_config(self, config: dict, config_dir_path: str, **kwargs):
acme_config = config.get("acme", None)
if acme_config is None:
@ -57,7 +60,7 @@ class TlsConfig(Config):
self.tls_certificate_file = self.abspath(config.get("tls_certificate_path"))
self.tls_private_key_file = self.abspath(config.get("tls_private_key_path"))
if self.has_tls_listener():
if self.root.server.has_tls_listener():
if not self.tls_certificate_file:
raise ConfigError(
"tls_certificate_path must be specified if TLS-enabled listeners are "
@ -108,7 +111,7 @@ class TlsConfig(Config):
)
# Support globs (*) in whitelist values
self.federation_certificate_verification_whitelist = []
self.federation_certificate_verification_whitelist = [] # type: List[str]
for entry in fed_whitelist_entries:
try:
entry_regex = glob_to_regex(entry.encode("ascii").decode("ascii"))

2
synapse/config/tracer.py
View File

@ -19,6 +19,8 @@ from ._base import Config, ConfigError
class TracerConfig(Config):
section = "tracing"
def read_config(self, config, **kwargs):
opentracing_config = config.get("opentracing")
if opentracing_config is None:

2
synapse/config/user_directory.py
View File

@ -21,6 +21,8 @@ class UserDirectoryConfig(Config):
Configuration for the behaviour of the /user_directory API
"""
section = "userdirectory"
def read_config(self, config, **kwargs):
self.user_directory_search_enabled = True
self.user_directory_search_all_users = False

2
synapse/config/voip.py
View File

@ -16,6 +16,8 @@ from ._base import Config
class VoipConfig(Config):
section = "voip"
def read_config(self, config, **kwargs):
self.turn_uris = config.get("turn_uris", [])
self.turn_shared_secret = config.get("turn_shared_secret")

2
synapse/config/workers.py
View File

@ -21,6 +21,8 @@ class WorkerConfig(Config):
They have their own pid_file and listener configuration. They use the
replication_url to talk to the main synapse process."""
section = "worker"
def read_config(self, config, **kwargs):
self.worker_app = config.get("worker_app")

25
tests/config/test_tls.py
View File

@ -21,17 +21,24 @@ import yaml
from OpenSSL import SSL
from synapse.config._base import Config, RootConfig
from synapse.config.tls import ConfigError, TlsConfig
from synapse.crypto.context_factory import ClientTLSOptionsFactory
from tests.unittest import TestCase
class TestConfig(TlsConfig):
class FakeServer(Config):
section = "server"
def has_tls_listener(self):
return False
class TestConfig(RootConfig):
config_classes = [FakeServer, TlsConfig]
class TLSConfigTests(TestCase):
def test_warn_self_signed(self):
"""
@ -202,13 +209,13 @@ s4niecZKPBizL6aucT59CsunNmmb5Glq8rlAcU+1ZTZZzGYqVYhF6axB9Qg=
conf = TestConfig()
conf.read_config(
yaml.safe_load(
TestConfig().generate_config_section(
TestConfig().generate_config(
"/config_dir_path",
"my_super_secure_server",
"/data_dir_path",
"/tls_cert_path",
"tls_private_key",
None, # This is the acme_domain
tls_certificate_path="/tls_cert_path",
tls_private_key_path="tls_private_key",
acme_domain=None, # This is the acme_domain
)
),
"/config_dir_path",
@ -223,13 +230,13 @@ s4niecZKPBizL6aucT59CsunNmmb5Glq8rlAcU+1ZTZZzGYqVYhF6axB9Qg=
conf = TestConfig()
conf.read_config(
yaml.safe_load(
TestConfig().generate_config_section(
TestConfig().generate_config(
"/config_dir_path",
"my_super_secure_server",
"/data_dir_path",
"/tls_cert_path",
"tls_private_key",
"my_supe_secure_server", # This is the acme_domain
tls_certificate_path="/tls_cert_path",
tls_private_key_path="tls_private_key",
acme_domain="my_supe_secure_server", # This is the acme_domain
)
),
"/config_dir_path",

3
tox.ini
View File

@ -163,10 +163,9 @@ deps =
{[base]deps}
mypy
mypy-zope
typeshed
env =
MYPYPATH = stubs/
extras = all
commands = mypy --show-traceback \
commands = mypy --show-traceback --check-untyped-defs --show-error-codes --follow-imports=normal \
synapse/logging/ \
synapse/config/