我需要在哈希数组或哈希树中获取嵌套块,以便能够用动态内容替换块.我需要替换之间的代码
- <!--block:XXX-->
和第一个结束块
- <!--endblock-->
用我的动态内容.
我有这个代码,找到一个级别的注释块但不嵌套:
- #<!--block:listing-->... html code block here ...<!--endblock-->
- $blocks{$1} = $2 while $content =~ /<!--block:(.*?)-->((?:(?:(?!<!--(.*?)-->).)|(?R))*?)<!--endblock-->/igs;
这是我想要处理的完整嵌套html模板.所以我需要找到并替换内部块“block:third”并将其替换为我的内容,然后找到“block:second”并替换它然后找到外部块“block:first”并替换它.请注意,可以有任意数量的嵌套块,而不是像下面的示例那样只有三个,它可以是几个嵌套块.
- use Data::Dumper;
- $content=<<HTML;
- some html content here
- <!--block:first-->
- some html content here
- <!--block:second-->
- some html content here
- <!--block:third-->
- some html content here
- <!--endblock-->
- some html content here
- <!--endblock-->
- some html content here
- <!--endblock-->
- HTML
- $blocks{$1} = $2 while $content =~ /<!--block:(.*?)-->((?:(?:(?!<!--(.*?)-->).)|(?R))*?)<!--endblock-->/igs;
- print Dumper(%blocks);
所以我可以访问和修改块,比如$block {first} =“我的内容在这里”和$block {second} =“另一个内容在这里”然后替换块.
我创建了这个regex
我要补充一点.这符合我以前的答案,但稍微多一些
完成,我不想再回答这个问题了.
完成,我不想再回答这个问题了.
这是针对@daliaessam的,是对@Miller轶事的递归解析的具体回应
使用正则表达式.
只有3个部分需要考虑.所以,使用我之前的表现形式,我向你们展示了一个
关于如何做到这一点的模板.它并不像你想象的那么难.
干杯!
- # //////////////////////////////////////////////////////
- # // The General Guide to 3-Part Recursive Parsing
- # // ----------------------------------------------
- # // Part 1. CONTENT
- # // Part 2. CORE
- # // Part 3. ERRORS
- (?is)
- (?:
- ( # (1),Take off CONTENT
- (?&content)
- )
- | # OR
- (?> # Start-Delimiter (in this case,must be atomic because of .*?)
- <!--block:
- ( .*? ) # (2),Block name
- -->
- )
- ( # (3),Take off The CORE
- (?&core)
- |
- )
- <!--endblock--> # End-Delimiter
- | # OR
- ( # (4),Take off Unbalanced (delimeter) ERRORS
- <!--
- (?: block: .*? | endblock )
- -->
- )
- )
- # ///////////////////////
- # // Subroutines
- # // ---------------
- (?(DEFINE)
- # core
- (?<core>
- (?>
- (?&content)
- |
- (?> <!--block: .*? --> )
- # recurse core
- (?:
- (?&core)
- |
- )
- <!--endblock-->
- )+
- )
- # content
- (?<content>
- (?>
- (?!
- <!--
- (?: block: .*? | endblock )
- -->
- )
- .
- )+
- )
- )
Perl代码:
- use strict;
- use warnings;
- use Data::Dumper;
- $/ = undef;
- my $content = <DATA>;
- # Set the error mode on/off here ..
- my $BailOnError = 1;
- my $IsError = 0;
- my $href = {};
- ParseCore( $href,$content );
- #print Dumper($href);
- print "\n\n";
- print "\nBase======================\n";
- print $href->{content};
- print "\nFirst======================\n";
- print $href->{first}->{content};
- print "\nSecond======================\n";
- print $href->{first}->{second}->{content};
- print "\nThird======================\n";
- print $href->{first}->{second}->{third}->{content};
- print "\nFourth======================\n";
- print $href->{first}->{second}->{third}->{fourth}->{content};
- print "\nFifth======================\n";
- print $href->{first}->{second}->{third}->{fourth}->{fifth}->{content};
- print "\nSix======================\n";
- print $href->{six}->{content};
- print "\nSeven======================\n";
- print $href->{six}->{seven}->{content};
- print "\nEight======================\n";
- print $href->{six}->{seven}->{eight}->{content};
- exit;
- sub ParseCore
- {
- my ($aref,$core) = @_;
- my ($k,$v);
- while ( $core =~ /(?is)(?:((?&content))|(?><!--block:(.*?)-->)((?&core)|)<!--endblock-->|(<!--(?:block:.*?|endblock)-->))(?(DEFINE)(?<core>(?>(?&content)|(?><!--block:.*?-->)(?:(?&core)|)<!--endblock-->)+)(?<content>(?>(?!<!--(?:block:.*?|endblock)-->).)+))/g )
- {
- if (defined $1)
- {
- # CONTENT
- $aref->{content} .= $1;
- }
- elsif (defined $2)
- {
- # CORE
- $k = $2; $v = $3;
- $aref->{$k} = {};
- # $aref->{$k}->{content} = $v;
- # $aref->{$k}->{match} = $&;
- my $curraref = $aref->{$k};
- my $ret = ParseCore($aref->{$k},$v);
- if ( $BailOnError && $IsError ) {
- last;
- }
- if (defined $ret) {
- $curraref->{'#next'} = $ret;
- }
- }
- else
- {
- # ERRORS
- print "Unbalanced '$4' at position = ",$-[0];
- $IsError = 1;
- # Decide to continue here ..
- # If BailOnError is set,just unwind recursion.
- # -------------------------------------------------
- if ( $BailOnError ) {
- last;
- }
- }
- }
- return $k;
- }
- #================================================
- __DATA__
- some html content here top base
- <!--block:first-->
- <table border="1" style="color:red;">
- <tr class="lines">
- <td align="left" valign="<--valign-->">
- <b>bold</b><a href="http://www.mewsoft.com">mewsoft</a>
- <!--hello--> <--again--><!--world-->
- some html content here 1 top
- <!--block:second-->
- some html content here 2 top
- <!--block:third-->
- some html content here 3 top
- <!--block:fourth-->
- some html content here 4 top
- <!--block:fifth-->
- some html content here 5a
- some html content here 5b
- <!--endblock-->
- <!--endblock-->
- some html content here 3a
- some html content here 3b
- <!--endblock-->
- some html content here 2 bottom
- <!--endblock-->
- some html content here 1 bottom
- <!--endblock-->
- some html content here1-5 bottom base
- some html content here 6-8 top base
- <!--block:six-->
- some html content here 6 top
- <!--block:seven-->
- some html content here 7 top
- <!--block:eight-->
- some html content here 8a
- some html content here 8b
- <!--endblock-->
- some html content here 7 bottom
- <!--endblock-->
- some html content here 6 bottom
- <!--endblock-->
- some html content here 6-8 bottom base
输出>>
- Base======================
- some html content here top base
- some html content here1-5 bottom base
- some html content here 6-8 top base
- some html content here 6-8 bottom base
- First======================
- <table border="1" style="color:red;">
- <tr class="lines">
- <td align="left" valign="<--valign-->">
- <b>bold</b><a href="http://www.mewsoft.com">mewsoft</a>
- <!--hello--> <--again--><!--world-->
- some html content here 1 top
- some html content here 1 bottom
- Second======================
- some html content here 2 top
- some html content here 2 bottom
- Third======================
- some html content here 3 top
- some html content here 3a
- some html content here 3b
- Fourth======================
- some html content here 4 top
- Fifth======================
- some html content here 5a
- some html content here 5b
- Six======================
- some html content here 6 top
- some html content here 6 bottom
- Seven======================
- some html content here 7 top
- some html content here 7 bottom
- Eight======================
- some html content here 8a
- some html content here 8b