apache pig，使用regex解析组合日志

t3irkdon 于 2021-06-21 发布在 Pig

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我使用pig拉丁语脚本，并尝试使用regex解析日志，但它在匹配双引号时返回错误”。例如：error 1200:意外字符“'”日志格式：

118.102.255.50 - - [17/Oct/2014:00:00:29 -0400] "GET /favicon.ico HTTP/1.1" 200 20 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.101 Safari/537.36"

而我写的剧本：

test = LOAD '/pigdata/log' as (line:chararray);
log = FOREACH test GENERATE FLATTEN(REGEX_EXTRACT_ALL(line,'^(\\S+)\\s+(\\S+)\\s+(\\S+)\\s+.(\\S+\\s+\\S+).\\s+\"(\\S+)\\s+(.+?)\\s+(HTTP[^\"]+)\"\\s+(\\S+)\\s+(\\S+)\\s+\"([^\"]*)\"\\s+\"(.*)\"$')) AS (address_ip: chararray, logname: chararray, user: chararray, timestamp: chararray, method: chararray, uri: chararray, proto: chararray, status: int, bytes: int, referer: chararray, userAgent: chararray);

dump log;

regex Logging apache-pig parsing quote

来源：https://stackoverflow.com/questions/41957536/apache-pig-parse-combined-log-using-regex

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按热度按时间

63lcw9qa1#

因为pig使用javaregex，所以需要避开 " 由 \\ 这样地：

log = FOREACH test GENERATE FLATTEN(REGEX_EXTRACT_ALL(line,'^(\\S+)\\s+(\\S+)\\s+(\\S+)\\s+.(\\S+\\s+\\S+).\\s+\\"(\\S+)\\s+(.+?)\\s+(HTTP[^"]+)\\"\\s+(\\S+)\\s+(\\S+)\\s+\\"([^"]*)\\"\\s+\\"(.*)\\"$')) AS (address_ip: chararray, logname: chararray, user: chararray, timestamp: chararray, method: chararray, uri: chararray, proto: chararray, status: int, bytes: int, referer: chararray, userAgent: chararray);

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apache pig，使用regex解析组合日志

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