读取Apache访问日志,查看每一个独立客户端连接获得的字节数

/var/log/apache2

# coding=utf-8
import sys


‘‘‘
数据
127.0.0.1 - - [10/Jan/2017:10:08:16 +0800] "POST /cgi-bin/login.py HTTP/1.1" 200 335 "-" "curl/7.35.0"
‘‘‘
def dictify_logline(line):
    split_line = line.split()
    return {
        "remote_address": split_line[0],
        "status": split_line[8],
        "bytes_sent": split_line[9]
    }


def generate_log_report(logfile):
    report_dict = {}
    for line in logfile:
        line_dict = dictify_logline(line)
        print line_dict
        try:
            bytes_send = int(line_dict["bytes_sent"])
        except ValueError:
            continue
        #统计每一个ip，对应发送的字节数
        report_dict.setdefault(
            line_dict["remote_address"],
            []).append(bytes_send)
    return report_dict


if __name__ == "__main__":
    if not len(sys.argv) > 1:
        sys.exit(1)
    infile_name = sys.argv[1]
    try:
        infile = open(infile_name, ‘r‘)
    except IOError:
        print ‘You must specify a valid file to parse‘
        sys.exit(1)

    log_report = generate_log_report(infile)
    print log_report
    infile.close()

#正则表达式提取数据
import re
log_line_re = re.compile(‘‘‘(?P<remote_address>\S+) #IP ADDRESS
\s+  #whitespace
\S+  #remote logname
\s+  #whitepsace
\S+  #remote user
\s+  #whitespace
\[[^\[\]]+\] #time
\s+  #whitespace
"[^"]+" #first line of request
\s+  #whitesapce
(?P<status>\d+)
\s+  #whitespace
(?P<bytes_sent>-|\d+)
\s*
‘‘‘, re.VERBOSE)

def dictify_logline(line):
    m = log_line_re.match(line)
    if m:
        groupdict = m.groupdict()
        if groupdict[‘bytes_sent‘] == ‘-‘:
            groupdict[‘bytes_sent‘] = ‘0‘
        return groupdict
    else:
        return {
            "remote_address": None,
            "status": None,
            "bytes_sent": "0"
        }