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logger.py
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logger.py
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from datetime import datetime
import os
class Logger:
"""
Handles logging for client and server.
"""
def __init__(self, log_level, conf_path, remote_host, logging_limit, thread=None):
"""
Configures logger with nesscary information for logging.
Args:
log_level (int): Log information level.
conf_path (str): Path to configuration folder to save log
remote_host (str): Hostname
logging_limit (int): Maximum file size allowed for logging
thread (str, optional): Name of server thread for stamp. Defaults to
None.
"""
self.__log_level = log_level
self.__log_path = os.path.join(conf_path, 'logs.txt')
self.__remote_host = remote_host
self.__thread = thread
self.__logging_limit = logging_limit
def __stamp(self):
"""
Generates log stamp for debugging.
Returns:
str: Log stamp
"""
host = 'SERVER' if self.__thread is not None else 'CLIENT'
time = datetime.now()
stamp = f'[{time} {host} {self.__remote_host}]'
if self.__thread is not None:
stamp += f' {self.__thread}'
return stamp
def log(self, message, level):
"""
Logs a message if the level if equal to or greater than the logging
level.
Args:
message (str): Message to log
level (int): log priority level
"""
if level <= self.__log_level:
self.__log(message)
def __log(self, message):
"""
Logs message to file.
Args:
message (str): Log
"""
message = self.__stamp() + ' - ' + message + '\n'
with open(self.__log_path, 'a+') as file:
file.write(message)
if self.__logging_limit != -1:
self.__check_log_size()
def __check_log_size(self):
"""
Ensures log does not exceed log file size limit.
"""
file_size = os.path.getsize(self.__log_path)
if file_size > self.__logging_limit:
distance = file_size - self.__logging_limit - 1
with open(self.__log_path, 'rb+') as log_file:
log_file.seek(distance)
newline_distance = log_file.read().find(b'\n')
if newline_distance != -1:
distance += newline_distance
log_file.seek(distance)
log_file.write(log_file.read())