日志

在任何一个完整的程序中，日志都是必不可少的一部分。日志的作用无需细说，下面是一个封装了发送日志到本地和syslog服务器的接口。

# -*- coding:utf-8 -*-

"""
File Name : 'log'.py
Description:
Author: 'chengwei'
Date: '2016/5/24' '16:24'
python: 2.7.10
"""
import logging
from logging.handlers import SysLogHandler
import time
import ConfigParser
import os
import codecs

def example():
    # 发送到远程syslogserver
    logger1 = to_syslog('local2', logging.INFO)
    for i in range(0, 20):
        time.sleep(0.5)
        msg = "abc %s" % i
        logger1.error(msg)
    # 存储日志到本地指定位置
    logger2 = local_log("test.log")
    for i in range(0, 20):
        time.sleep(1.1)
        msg = "abc %s" % i
        logger2.error(msg)

def local_log(logname, level=logging.INFO):
    """
    :param logname:表示存储路径和文件名
    :param level:表示日志输出级别logging.DEBUG,logging.INFO等等，默认为logging.INFO
    :return:logger
    """
    format = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(filename)s[line:%(lineno)d] - %(message)s')
    handler = logging.FileHandler(logname)
    handler.setFormatter(format)

    logger = logging.getLogger()
    logger.addHandler(handler)
    logger.setLevel(level)
    return logger

def to_syslog(user, level=logging.INFO):
    """
    发送日志到syslog服务器
    :param user:表示自定义local0-7
    :param level:表示日志输出级别logging.DEBUG,logging.INFO等等,默认为logging.INFO
    :return:logger
    """
    sysloghost = init()
    format = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(filename)s[line:%(lineno)d] - %(message)s')
    handler = SysLogHandler(address=(sysloghost, 514), facility=user)
    handler.setFormatter(format)
    logger = logging.getLogger()
    logger.addHandler(handler)
    logger.setLevel(level)
    return logger

def init(parasecname="LOG"):
    """
    从配置文件获取参数
    :param parasecname: 配置文件中节点名称
    :return:配置信息
    """
    cur_script_dir = os.path.split(os.path.realpath(__file__))[0]
    cfg_path = os.path.join(cur_script_dir, "db.conf")
    cfg_reder = ConfigParser.ConfigParser()
    secname = parasecname
    cfg_reder.readfp(codecs.open(cfg_path, "r", "utf_8"))
    sysloghost = cfg_reder.get(secname, "server")
    return sysloghost


if __name__ == '__main__':
    example()