/
config.py
225 lines (180 loc) · 6.45 KB
/
config.py
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from inspect import isclass
from os import environ
from pathlib import Path
from typing import Any, Dict, Optional, Union
from warnings import warn
from sanic.errorpages import check_error_format
from sanic.http import Http
from .utils import load_module_from_file_location, str_to_bool
SANIC_PREFIX = "SANIC_"
BASE_LOGO = """
Sanic
Build Fast. Run Fast.
"""
DEFAULT_CONFIG = {
"ACCESS_LOG": True,
"EVENT_AUTOREGISTER": False,
"FALLBACK_ERROR_FORMAT": "auto",
"FORWARDED_FOR_HEADER": "X-Forwarded-For",
"FORWARDED_SECRET": None,
"GRACEFUL_SHUTDOWN_TIMEOUT": 15.0, # 15 sec
"KEEP_ALIVE_TIMEOUT": 5, # 5 seconds
"KEEP_ALIVE": True,
"NOISY_EXCEPTIONS": False,
"PROXIES_COUNT": None,
"REAL_IP_HEADER": None,
"REGISTER": True,
"REQUEST_BUFFER_SIZE": 65536, # 64 KiB
"REQUEST_MAX_HEADER_SIZE": 8192, # 8 KiB, but cannot exceed 16384
"REQUEST_ID_HEADER": "X-Request-ID",
"REQUEST_MAX_SIZE": 100000000, # 100 megabytes
"REQUEST_TIMEOUT": 60, # 60 seconds
"RESPONSE_TIMEOUT": 60, # 60 seconds
"WEBSOCKET_MAX_SIZE": 2 ** 20, # 1 megabyte
"WEBSOCKET_PING_INTERVAL": 20,
"WEBSOCKET_PING_TIMEOUT": 20,
}
class Config(dict):
ACCESS_LOG: bool
EVENT_AUTOREGISTER: bool
FALLBACK_ERROR_FORMAT: str
FORWARDED_FOR_HEADER: str
FORWARDED_SECRET: Optional[str]
GRACEFUL_SHUTDOWN_TIMEOUT: float
KEEP_ALIVE_TIMEOUT: int
KEEP_ALIVE: bool
NOISY_EXCEPTIONS: bool
PROXIES_COUNT: Optional[int]
REAL_IP_HEADER: Optional[str]
REGISTER: bool
REQUEST_BUFFER_SIZE: int
REQUEST_MAX_HEADER_SIZE: int
REQUEST_ID_HEADER: str
REQUEST_MAX_SIZE: int
REQUEST_TIMEOUT: int
RESPONSE_TIMEOUT: int
SERVER_NAME: str
WEBSOCKET_MAX_SIZE: int
WEBSOCKET_PING_INTERVAL: int
WEBSOCKET_PING_TIMEOUT: int
def __init__(
self,
defaults: Dict[str, Union[str, bool, int, float, None]] = None,
load_env: Optional[Union[bool, str]] = True,
env_prefix: Optional[str] = SANIC_PREFIX,
keep_alive: Optional[bool] = None,
):
defaults = defaults or {}
super().__init__({**DEFAULT_CONFIG, **defaults})
self.LOGO = BASE_LOGO
if keep_alive is not None:
self.KEEP_ALIVE = keep_alive
if env_prefix != SANIC_PREFIX:
if env_prefix:
self.load_environment_vars(env_prefix)
elif load_env is not True:
if load_env:
self.load_environment_vars(prefix=load_env)
warn(
"Use of load_env is deprecated and will be removed in "
"21.12. Modify the configuration prefix by passing "
"env_prefix instead.",
DeprecationWarning,
)
else:
self.load_environment_vars(SANIC_PREFIX)
self._configure_header_size()
self._check_error_format()
def __getattr__(self, attr):
try:
return self[attr]
except KeyError as ke:
raise AttributeError(f"Config has no '{ke.args[0]}'")
def __setattr__(self, attr, value):
self[attr] = value
if attr in (
"REQUEST_MAX_HEADER_SIZE",
"REQUEST_BUFFER_SIZE",
"REQUEST_MAX_SIZE",
):
self._configure_header_size()
elif attr == "FALLBACK_ERROR_FORMAT":
self._check_error_format()
def _configure_header_size(self):
Http.set_header_max_size(
self.REQUEST_MAX_HEADER_SIZE,
self.REQUEST_BUFFER_SIZE - 4096,
self.REQUEST_MAX_SIZE,
)
def _check_error_format(self):
check_error_format(self.FALLBACK_ERROR_FORMAT)
def load_environment_vars(self, prefix=SANIC_PREFIX):
"""
Looks for prefixed environment variables and applies
them to the configuration if present. This is called automatically when
Sanic starts up to load environment variables into config.
It will automatically hyrdate the following types:
- ``int``
- ``float``
- ``bool``
Anything else will be imported as a ``str``.
"""
for k, v in environ.items():
if k.startswith(prefix):
_, config_key = k.split(prefix, 1)
try:
self[config_key] = int(v)
except ValueError:
try:
self[config_key] = float(v)
except ValueError:
try:
self[config_key] = str_to_bool(v)
except ValueError:
self[config_key] = v
def update_config(self, config: Union[bytes, str, dict, Any]):
"""
Update app.config.
.. note::
Only upper case settings are considered
You can upload app config by providing path to py file
holding settings.
.. code-block:: python
# /some/py/file
A = 1
B = 2
.. code-block:: python
config.update_config("${some}/py/file")
Yes you can put environment variable here, but they must be provided
in format: ``${some_env_var}``, and mark that ``$some_env_var`` is
treated as plain string.
You can upload app config by providing dict holding settings.
.. code-block:: python
d = {"A": 1, "B": 2}
config.update_config(d)
You can upload app config by providing any object holding settings,
but in such case config.__dict__ will be used as dict holding settings.
.. code-block:: python
class C:
A = 1
B = 2
config.update_config(C)
`See user guide re: config
<https://sanicframework.org/guide/deployment/configuration.html>`__
"""
if isinstance(config, (bytes, str, Path)):
config = load_module_from_file_location(location=config)
if not isinstance(config, dict):
cfg = {}
if not isclass(config):
cfg.update(
{
key: getattr(config, key)
for key in config.__class__.__dict__.keys()
}
)
config = dict(config.__dict__)
config.update(cfg)
config = dict(filter(lambda i: i[0].isupper(), config.items()))
self.update(config)
load = update_config