perl 脚本中的正则表达式问题

Issue with regex in perl script

processLine('23/05/2017 07:10:58 [6] 00-Always: ACTION=QUERY&Text=iphone%205%20has%20no%20network%2A&Summary=Context&SpellCheck=true&QuerySummary=false&Sort=AutnRank%2BRelevance&Synonym=true&TotalResults=true&MaxResults=10&PrintFields=drereference%2Cdretitle%2Ccontenttype%2Cautnrank%2COPTUS%5FFILTER1%2COPTUS%5FFILTER2%2COPTUS%5FFILTER3%2CCANONICAL%5FURL&Start=1&Predict=false&FieldText=%28MATCH%7BMy%20Optus%20Community%7D%3AOPTUS%5FFILTER1%3AOPTUS%5FFILTER2%3AOPTUS%5FFILTER3%20NOT%20MATCH%7Bsmb%7D%3ACONTEXT%20NOT%20MATCH%7BCustom%5FPromotions%7D%3ADREDBNAME%29%2BOR%2B%28%28MATCH%7BCustom%5FPromotions%7D%3ADREDBNAME%29%2BAND%2B%28BIASVAL%7Biphone%205%20has%20no%20network%2A%2C100%7D%3APromotion%5FKeywords%29%2BAND%2B%28MATCH%7Biphone%205%20has%20no%20network%2A%7D%3APromotion%5FKeywords%29%29&Combine=Simple&Characters=250 (127.0.0.1)');
if (defined $query && defined $ip && $query =~ m!/?a.*?=(\w+)([?&].*(?<=[?&])Text=([^?&]*))?!) 
{
        $events++;
        my $action = ;
        my $terms = uri_unescape() || "";
}

我想从 Text=iphone%205%20has%20no%20network%2A 中剥离 iphone%205%20has%20no%20network%2A 并存储在 </code> 中。我测试了正则表达式,但似乎没有发现问题。它打印 <code> 作为上下文。

期望是 </code> 输出值为 <code>iphonehasnonetwork

当我过去时,

processLine('25/05/2017 14:48:10 [9] 00-Always: action=Query&text=samsung&databasematch=Help_Support&ResponseFormat=json&_=1495687690880 (127.0.0.1)');

它将 </code> 打印为 <code>QuerySamsung。这是预期的结果。

我是 Perl 的新手,我想修改这个正则表达式并解决这个问题。我已经剥离了我的 perl 脚本并诊断了根本问题。在 regex101.com

中测试正则表达式的各个组件后,这个正则表达式对我来说看起来不错

您忘记在正则表达式中添加忽略大小写修饰符:

$query =~ m!/?a.*?=(\w+)([?&].*(?<=[?&])Text=([^?&]*))?!i

到底看到i了吗?

在此处阅读更多内容:https://perldoc.perl.org/perlre.html#Modifiers

我不确定您的正则表达式还有什么其他问题,但我立即看到: 1) 捕获组由左括号编号,所以我认为您需要 $4,而不是 $3 2) 'Text' 可能匹配 'FieldText' 后面的字符串

您真的应该通过拆分所有参数 (&) 然后拆分键值对 (=) 来正确解析 URI