matteo-the-prestige/matteo_env/Lib/site-packages/aiohttp/web_log.py

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2020-12-20 00:08:09 +00:00
import datetime
import functools
import logging
import os
import re
from collections import namedtuple
from typing import Any, Callable, Dict, Iterable, List, Tuple # noqa
from .abc import AbstractAccessLogger
from .web_request import BaseRequest
from .web_response import StreamResponse
KeyMethod = namedtuple('KeyMethod', 'key method')
class AccessLogger(AbstractAccessLogger):
"""Helper object to log access.
Usage:
log = logging.getLogger("spam")
log_format = "%a %{User-Agent}i"
access_logger = AccessLogger(log, log_format)
access_logger.log(request, response, time)
Format:
%% The percent sign
%a Remote IP-address (IP-address of proxy if using reverse proxy)
%t Time when the request was started to process
%P The process ID of the child that serviced the request
%r First line of request
%s Response status code
%b Size of response in bytes, including HTTP headers
%T Time taken to serve the request, in seconds
%Tf Time taken to serve the request, in seconds with floating fraction
in .06f format
%D Time taken to serve the request, in microseconds
%{FOO}i request.headers['FOO']
%{FOO}o response.headers['FOO']
%{FOO}e os.environ['FOO']
"""
LOG_FORMAT_MAP = {
'a': 'remote_address',
't': 'request_start_time',
'P': 'process_id',
'r': 'first_request_line',
's': 'response_status',
'b': 'response_size',
'T': 'request_time',
'Tf': 'request_time_frac',
'D': 'request_time_micro',
'i': 'request_header',
'o': 'response_header',
}
LOG_FORMAT = '%a %t "%r" %s %b "%{Referer}i" "%{User-Agent}i"'
FORMAT_RE = re.compile(r'%(\{([A-Za-z0-9\-_]+)\}([ioe])|[atPrsbOD]|Tf?)')
CLEANUP_RE = re.compile(r'(%[^s])')
_FORMAT_CACHE = {} # type: Dict[str, Tuple[str, List[KeyMethod]]]
def __init__(self, logger: logging.Logger,
log_format: str=LOG_FORMAT) -> None:
"""Initialise the logger.
logger is a logger object to be used for logging.
log_format is a string with apache compatible log format description.
"""
super().__init__(logger, log_format=log_format)
_compiled_format = AccessLogger._FORMAT_CACHE.get(log_format)
if not _compiled_format:
_compiled_format = self.compile_format(log_format)
AccessLogger._FORMAT_CACHE[log_format] = _compiled_format
self._log_format, self._methods = _compiled_format
def compile_format(self, log_format: str) -> Tuple[str, List[KeyMethod]]:
"""Translate log_format into form usable by modulo formatting
All known atoms will be replaced with %s
Also methods for formatting of those atoms will be added to
_methods in appropriate order
For example we have log_format = "%a %t"
This format will be translated to "%s %s"
Also contents of _methods will be
[self._format_a, self._format_t]
These method will be called and results will be passed
to translated string format.
Each _format_* method receive 'args' which is list of arguments
given to self.log
Exceptions are _format_e, _format_i and _format_o methods which
also receive key name (by functools.partial)
"""
# list of (key, method) tuples, we don't use an OrderedDict as users
# can repeat the same key more than once
methods = list()
for atom in self.FORMAT_RE.findall(log_format):
if atom[1] == '':
format_key1 = self.LOG_FORMAT_MAP[atom[0]]
m = getattr(AccessLogger, '_format_%s' % atom[0])
key_method = KeyMethod(format_key1, m)
else:
format_key2 = (self.LOG_FORMAT_MAP[atom[2]], atom[1])
m = getattr(AccessLogger, '_format_%s' % atom[2])
key_method = KeyMethod(format_key2,
functools.partial(m, atom[1]))
methods.append(key_method)
log_format = self.FORMAT_RE.sub(r'%s', log_format)
log_format = self.CLEANUP_RE.sub(r'%\1', log_format)
return log_format, methods
@staticmethod
def _format_i(key: str,
request: BaseRequest,
response: StreamResponse,
time: float) -> str:
if request is None:
return '(no headers)'
# suboptimal, make istr(key) once
return request.headers.get(key, '-')
@staticmethod
def _format_o(key: str,
request: BaseRequest,
response: StreamResponse,
time: float) -> str:
# suboptimal, make istr(key) once
return response.headers.get(key, '-')
@staticmethod
def _format_a(request: BaseRequest,
response: StreamResponse,
time: float) -> str:
if request is None:
return '-'
ip = request.remote
return ip if ip is not None else '-'
@staticmethod
def _format_t(request: BaseRequest,
response: StreamResponse,
time: float) -> str:
now = datetime.datetime.utcnow()
start_time = now - datetime.timedelta(seconds=time)
return start_time.strftime('[%d/%b/%Y:%H:%M:%S +0000]')
@staticmethod
def _format_P(request: BaseRequest,
response: StreamResponse,
time: float) -> str:
return "<%s>" % os.getpid()
@staticmethod
def _format_r(request: BaseRequest,
response: StreamResponse,
time: float) -> str:
if request is None:
return '-'
return '%s %s HTTP/%s.%s' % (request.method, request.path_qs,
request.version.major,
request.version.minor)
@staticmethod
def _format_s(request: BaseRequest,
response: StreamResponse,
time: float) -> int:
return response.status
@staticmethod
def _format_b(request: BaseRequest,
response: StreamResponse,
time: float) -> int:
return response.body_length
@staticmethod
def _format_T(request: BaseRequest,
response: StreamResponse,
time: float) -> str:
return str(round(time))
@staticmethod
def _format_Tf(request: BaseRequest,
response: StreamResponse,
time: float) -> str:
return '%06f' % time
@staticmethod
def _format_D(request: BaseRequest,
response: StreamResponse,
time: float) -> str:
return str(round(time * 1000000))
def _format_line(self,
request: BaseRequest,
response: StreamResponse,
time: float) -> Iterable[Tuple[str,
Callable[[BaseRequest,
StreamResponse,
float],
str]]]:
return [(key, method(request, response, time))
for key, method in self._methods]
def log(self,
request: BaseRequest,
response: StreamResponse,
time: float) -> None:
try:
fmt_info = self._format_line(request, response, time)
values = list()
extra = dict()
for key, value in fmt_info:
values.append(value)
if key.__class__ is str:
extra[key] = value
else:
k1, k2 = key
dct = extra.get(k1, {}) # type: Any
dct[k2] = value
extra[k1] = dct
self.logger.info(self._log_format % tuple(values), extra=extra)
except Exception:
self.logger.exception("Error in logging")