python - 如何使用Python正则表达式处理zookeeper日志文件？

Question

我有如下的动物园管理员日志:

2019-09-25 11:16:39,253 [myid:] - WARN  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - caught end of stream exception
EndOfStreamException: Unable to read additional data from client sessionid 0x16d666b95e10002, likely client has closed socket
        at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228)
        at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)
        at java.lang.Thread.run(Thread.java:745)
2019-09-25 11:16:39,260 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1008] - Closed socket connection for client /192.168.101.231:48311 which had sessionid 0x16d666b95e10002
2019-09-25 11:16:40,000 [myid:] - INFO  [SessionTracker:ZooKeeperServer@358] - Expiring session 0x36b63c29fbac528, timeout of 10000ms exceeded

我试图得到以下结果:

log entry 1:
2019-09-25 11:16:39,253 [myid:] - WARN  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - caught end of stream exception
EndOfStreamException: Unable to read additional data from client sessionid 0x16d666b95e10002, likely client has closed socket
        at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228)
        at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)
        at java.lang.Thread.run(Thread.java:745)

log entry 2:
2019-09-25 11:16:39,260 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1008] - Closed socket connection for client /192.168.101.231:48311 which had sessionid 0x16d666b95e10002

log entry 3:
2019-09-25 11:16:39,260 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1008] - Closed socket connection for client /192.168.101.231:48311 which had sessionid 0x16d666b95e10002
2019-09-25 11:16:40,000 [myid:] - INFO  [SessionTracker:ZooKeeperServer@358] - Expiring session 0x36b63c29fbac528, timeout of 10000ms exceeded

我尝试使用以下正则表达式模式:

import re

content = "2019-09-25 11:16:39,253 [myid:] - WARN  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - caught end of stream exception\n \
EndOfStreamException: Unable to read additional data from client sessionid 0x16d666b95e10002, likely client has closed socket\n \
        at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228)\n \
        at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)\n \
        at java.lang.Thread.run(Thread.java:745)\n \
2019-09-25 11:16:39,260 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1008] - Closed socket connection for client /192.168.101.231:48311 which had sessionid 0x16d666b95e10002\n \
2019-09-25 11:16:40,000 [myid:] - INFO  [SessionTracker:ZooKeeperServer@358] - Expiring session 0x36b63c29fbac528, timeout of 10000ms exceeded\n \
"

pattern = re.compile("(\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2}.*)+",re.DOTALL|re.MULTILINE)

match = re.match(pattern, content)
for f in match.groups():
    print(f,"\nEND")

但它匹配整个内容:

2019-09-25 11:16:39,253 [myid:] - WARN  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - caught end of stream exception
 EndOfStreamException: Unable to read additional data from client sessionid 0x16d666b95e10002, likely client has closed socket
         at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228)
         at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)
         at java.lang.Thread.run(Thread.java:745)
 2019-09-25 11:16:39,260 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1008] - Closed socket connection for client /192.168.101.231:48311 which had sessionid 0x16d666b95e10002
 2019-09-25 11:16:40,000 [myid:] - INFO  [SessionTracker:ZooKeeperServer@358] - Expiring session 0x36b63c29fbac528, timeout of 10000ms exceeded

END

有人知道如何解决这个问题吗？非常感谢!

Answer 1

您可以尝试以下正则表达式:

\d{4}(?:-\d{2}){2} \d{2}(?::\d{2}){2},\d{3}(?:(?!\d{4}(?:-\d{2}){2} \d{2}(?::\d{2}){2},\d{3})[\s\S])*

<强> Click for Demo

说明:

• \d{4}(?:-\d{2}){2}\d{2}(?::\d{2}){2},\d{3} - 匹配模式 XXXX-XX-XX XX:XX:XX,XXX 的时间戳，其中 X 是数字
• (?:(?!\d{4}(?:-\d{2}){2}\d{2}(?::\d{2}){2},\d{3})[\s\S])* - 匹配任何字符出现 0 次以上，只要它不以上面指针 1 中提到的格式的另一个时间戳开头。

您可以找到working Python代码here .