python logging 模块完整使用示例
支持文件、屏幕打印、电子邮件、TCP、UDP、syslog本地、syslog远程、windows事件、http server方式记录日志：
1 #!/usr/bin/python 2 import os 3 import sys 4 import logging 5 import logging.config 6 from logging import handlers 7 8 DEBUG = True 9 10 SYSLOG_HANDLER_HOST = 'localhost' 11 12 LOG_PATH = '../server.log' 13 14 MAIL_HANDLER_HOST = 'smtp.qq.com' 15 MAIL_HANDLER_FROMADDR = 'user@qq.com' 16 MAIL_HANDLER_TOADDRS = ['user1@qq.com','user2@gmail.com'] 17 MAIL_HANDLER_SUBJECT = 'Logging from python app' 18 MAIL_HANDLER_CREDENTIALS = ('user@qq.com','password') 19 20 TCPSOCKET_HANDLER_HOST = 'localhost' 21 TCPSOCKET_HANDLER_PORT = 9022 22 23 UDPSOCKET_HANDLER_HOST = 'localhost' 24 UDPSOCKET_HANDLER_PORT = 9021 25 26 NTEVENT_HANDLER_APPNAME = 'Python Application' 27 NTEVENT_HANDLER_LOGTYPE = 'Application' 28 29 HTTP_HANDLER_HOST = 'localhost:8000' 30 HTTP_HANDLER_URL = '/logging' 31 HTTP_HANDLER_METHOD = 'GET' 32 33 34 LOGGING = { 35 'version': 1, 36 'disable_existing_loggers': True, 37 'formatters': { 38 'detail': { 39 'format': '%(name)s %(levelname)s %(asctime)s %(module)s %(process)d %(thread)d [%(pathname)s:%(lineno)d] %(message)s' 40 }, 41 'verbose': { 42 'format': '%(name)s %(levelname)s %(asctime)s [%(pathname)s:%(lineno)d] %(message)s' 43 }, 44 'simple': { 45 'format': '%(name)s %(levelname)s %(message)s' 46 }, 47 }, 48 'handlers': { 49 'console':{ 50 'level':'NOTSET', 51 'class':'logging.StreamHandler', 52 'stream':sys.stderr, 53 'formatter': 'verbose' #'simple' 54 }, 55 'file':{ 56 'level':'DEBUG', 57 'class':'logging.handlers.RotatingFileHandler', 58 'filename': os.path.join(os.getcwd(), LOG_PATH), 59 'formatter': 'verbose', 60 'maxBytes': 1024*1024*20, # 20MB 61 'backupCount': 5, 62 }, 63 'syslog.remote':{ 64 'level':'DEBUG', 65 'class':'logging.handlers.SysLogHandler', 66 'address':(SYSLOG_HANDLER_HOST,handlers.SYSLOG_UDP_PORT), # log to syslog or rsyslog server 67 'formatter': 'verbose', 68 }, 69 'mail.handler':{ 70 'level':'DEBUG', 71 'class':'logging.handlers.SMTPHandler', # log to mailbox 72 'mailhost':MAIL_HANDLER_HOST, 73 'fromaddr':MAIL_HANDLER_FROMADDR, 74 'toaddrs':MAIL_HANDLER_TOADDRS, 75 'subject':MAIL_HANDLER_SUBJECT, 76 'credentials':MAIL_HANDLER_CREDENTIALS, 77 'formatter': 'detail', 78 }, 79 'socket.tcp.handler':{ 80 'level':'DEBUG', 81 'class':'logging.handlers.SocketHandler', # log to tcp socket 82 'host':TCPSOCKET_HANDLER_HOST, 83 'port':TCPSOCKET_HANDLER_PORT, 84 'formatter': 'verbose', 85 }, 86 'socket.udp.handler':{ 87 'level':'DEBUG', 88 'class':'logging.handlers.DatagramHandler', # log to udp socket 89 'host':UDPSOCKET_HANDLER_HOST, 90 'port':UDPSOCKET_HANDLER_PORT, 91 'formatter': 'verbose', 92 }, 93 'http.handler':{ 94 'level':'DEBUG', 95 'class':'logging.handlers.HTTPHandler', # log to http server 96 'host':HTTP_HANDLER_HOST, 97 'url':HTTP_HANDLER_URL, 98 'method':HTTP_HANDLER_METHOD, 99 'formatter': 'verbose', 100 } 101 }, 102 'loggers': { 103 'CommonLogger': { 104 'handlers': ['console', 'file'] if DEBUG else ['file'], 105 'level': 'DEBUG' if DEBUG else 'DEBUG', #'INFO' 106 'propagate': False, 107 # very important in multithread environment, means disable propagation from current logger to the *root* logger. 108 }, 109 } 110 } 111 112 syslog_local = { 113 'level':'DEBUG', 114 'class':'logging.handlers.SysLogHandler', 115 'address':'/dev/log', # log to local syslog file 116 'formatter': 'verbose', 117 } 118 119 ntevent_handler = { 120 'level':'DEBUG', 121 'class':'logging.handlers.NTEventLogHandler', # log to windows event log 122 'appname':NTEVENT_HANDLER_APPNAME, 123 'logtype':NTEVENT_HANDLER_LOGTYPE, 124 'formatter': 'verbose', 125 } 126 127 common_logger = { 128 'handlers': ['console', 'file'] if DEBUG else ['file'], 129 'level': 'DEBUG' if DEBUG else 'DEBUG', #'INFO' 130 'propagate': False, 131 # very important in multithread environment, means disable propagation from current logger to the *root* logger. 132 } 133 134 135 if sys.platform == 'linux2': 136 LOGGING['handlers']['syslog.local'] = syslog_local 137 if sys.platform == 'win32': 138 LOGGING['handlers']['ntevent.handler'] = ntevent_handler 139 140 def getlogger(logger_name=None): 141 if isinstance(logger_name,str) or isinstance(logger_name,unicode): 142 LOGGING['loggers'][logger_name] = common_logger 143 logging.config.dictConfig(LOGGING) 144 logger = logging.getLogger(logger_name) 145 else: 146 logging.config.dictConfig(LOGGING) 147 logger = logging.getLogger("CommonLogger") 148 149 return logger
另附上一个接收tcp方式日志的服务器：
1 import cPickle 2 import logging 3 import logging.handlers 4 import SocketServer 5 import struct 6 7 8 class LogRecordStreamHandler(SocketServer.StreamRequestHandler): 9 """Handler for a streaming logging request. 10 11 This basically logs the record using whatever logging policy is 12 configured locally. 13 """ 14 15 def handle(self): 16 """ 17 Handle multiple requests - each expected to be a 4-byte length, 18 followed by the LogRecord in pickle format. Logs the record 19 according to whatever policy is configured locally. 20 """ 21 while 1: 22 chunk = self.connection.recv(4) 23 if len(chunk) < 4: 24 break 25 slen = struct.unpack(">L", chunk)[0] 26 chunk = self.connection.recv(slen) 27 while len(chunk) < slen: 28 chunk = chunk + self.connection.recv(slen - len(chunk)) 29 obj = self.unPickle(chunk) 30 record = logging.makeLogRecord(obj) 31 self.handleLogRecord(record) 32 33 def unPickle(self, data): 34 return cPickle.loads(data) 35 36 def handleLogRecord(self, record): 37 # if a name is specified, we use the named logger rather than the one 38 # implied by the record. 39 if self.server.logname is not None: 40 name = self.server.logname 41 else: 42 name = record.name 43 logger = logging.getLogger(name) 44 # N.B. EVERY record gets logged. This is because Logger.handle 45 # is normally called AFTER logger-level filtering. If you want 46 # to do filtering, do it at the client end to save wasting 47 # cycles and network bandwidth! 48 logger.handle(record) 49 50 class LogRecordSocketReceiver(SocketServer.ThreadingTCPServer): 51 """simple TCP socket-based logging receiver suitable for testing. 52 """ 53 54 allow_reuse_address = 1 55 56 def __init__(self, host='localhost', 57 port=9022, 58 handler=LogRecordStreamHandler): 59 SocketServer.ThreadingTCPServer.__init__(self, (host, port), handler) 60 self.abort = 0 61 self.timeout = 1 62 self.logname = None 63 64 def serve_until_stopped(self): 65 import select 66 abort = 0 67 while not abort: 68 rd, wr, ex = select.select([self.socket.fileno()], 69 [], [], 70 self.timeout) 71 if rd: 72 self.handle_request() 73 abort = self.abort 74 75 def main(): 76 logging.basicConfig( 77 format="%(levelname)s %(name)s %(asctime)s [%(pathname)s:%(lineno)d] %(message)s") 78 tcpserver = LogRecordSocketReceiver() 79 print "About to start TCP server..." 80 tcpserver.serve_until_stopped() 81 82 if __name__ == "__main__": 83 main()
见原文：http://docs.python.org/release/2.4.4/lib/network-logging.html
