import logging
import os
from robot import constants
from logging.handlers import RotatingFileHandler
PAGE = 4096
DEBUG = logging.DEBUG
INFO = logging.INFO
WARNING = logging.WARNING
ERROR = logging.ERROR
[文档]def tail(filepath, n=10):
"""
实现 tail -n
"""
res = ""
with open(filepath, 'rb') as f:
f_len = f.seek(0, 2)
rem = f_len % PAGE
page_n = f_len // PAGE
r_len = rem if rem else PAGE
while True:
# 如果读取的页大小>=文件大小,直接读取数据输出
if r_len >= f_len:
f.seek(0)
lines = f.readlines()[::-1]
break
f.seek(-r_len, 2)
# print('f_len: {}, rem: {}, page_n: {}, r_len: {}'.format(f_len, rem, page_n, r_len))
lines = f.readlines()[::-1]
count = len(lines) -1 # 末行可能不完整,减一行,加大读取量
if count >= n: # 如果读取到的行数>=指定行数,则退出循环读取数据
break
else: # 如果读取行数不够,载入更多的页大小读取数据
r_len += PAGE
page_n -= 1
for line in lines[:n][::-1]:
res += line.decode('utf-8')
return res
[文档]def getLogger(name):
"""
作用同标准模块 logging.getLogger(name)
:returns: logger
"""
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
logger = logging.getLogger(name)
logger.setLevel(logging.INFO)
# FileHandler
file_handler = RotatingFileHandler(os.path.join(constants.TEMP_PATH, 'wukong.log'), maxBytes=1024*1024,backupCount=5)
file_handler.setLevel(level=logging.DEBUG)
file_handler.setFormatter(formatter)
logger.addHandler(file_handler)
return logger
[文档]def readLog(lines=200):
"""
获取最新的指定行数的 log
:param lines: 最大的行数
:returns: 最新指定行数的 log
"""
log_path = os.path.join(constants.TEMP_PATH, 'wukong.log')
if os.path.exists(log_path):
return tail(log_path, lines)
return ''