如何将 CSV 格式添加到 LWP::Simple

Question

关于这个 Target-Url 德国学校数据库http://192.68.214.70/km/asps/schulsuche.asp?q=a&a=100&s=1750

这个目标网址有一个网格-（或表格）-我有一个运行良好的代码-但它无法处理网格...

它会吐出如下数据...

lfd. Nr. Schul- nummer Schulname Straße PLZ Ort Telefon Fax Schulart Webseite

1 0401 Mädchenrealschule Marienburg, Abenberg, der Diözese Eichstätt Marienburg 1 91183  Abenberg   09178/509210  Realschulen  mrs-marienburg.homepage.t-online.de 
2 6581 Volksschule Abenberg (Grundschule) Güssübelstr. 2 91183  Abenberg   09178/215 09178/905060 Volksschulen  home.t-online.de/home/vs-abenberg 
3 6913 Mittelschule Abenberg  Güssübelstr. 2 91183  Abenberg   09178/215 09178/905060 Volksschulen  home.t-online.de/home/vs-abenberg 
4 0402 Johann-Turmair-Realschule Staatliche Realschule Abensberg Stadionstraße 46 93326  Abensberg   09443/9143-0,12,13 09443/914330 Realschulen  www.rs-abensberg.de 

这很糟糕 - 我需要一个分隔符 - 我怎样才能在结果中加入一些分隔符 - 要么 逗号或制表符....？

这里是代码：

  #!/usr/bin/perl
    use strict;
    use warnings;
    use HTML::TableExtract;
    use LWP::Simple;
    use Cwd;
    use POSIX qw(strftime);
    my $te = HTML::TableExtract->new;
    my $total_records = 0;
    my $suchbegriffe = "e";
    my $treffer = 50;
    my $range = 0;
    my $url_to_process = "http://192.68.214.70/km/asps/schulsuche.asp?q=";
    my $processdir = "processing";
    my $counter = 50;
    my $displaydate = "";
    my $percent = 0;

    &workDir();
    chdir $processdir;
    &processURL();
    print "\nPress <enter> to continue\n";
    <>;
    $displaydate = strftime('%Y%m%d%H%M%S', localtime);
    open OUTFILE, ">webdata_for_$suchbegriffe\_$displaydate.txt";
    &processData();
    close OUTFILE;
    print "Finished processing $total_records records...\n";
    print "Processed data saved to $ENV{HOME}/$processdir/webdata_for_$suchbegriffe\_$displaydate.txt\n";
    unlink 'processing.html';
    die "\n";

    sub processURL() {
    print "\nProcessing $url_to_process$suchbegriffe&a=$treffer&s=$range\n";
    getstore("$url_to_process$suchbegriffe&a=$treffer&s=$range", 'tempfile.html') or die 'Unable to get page';

       while( <tempfile.html> ) {
          open( FH, "$_" ) or die;
          while( <FH> ) {
             if( $_ =~ /^.*?(Treffer <b>)(d+)( - )(d+)(</b> w+ w+ <b>)(d+).*/ ) {
                $total_records = $6;
                print "Total records to process is $total_records\n";
                }
             }
             close FH;
       }
       unlink 'tempfile.html';
    }

    sub processData() {
       while ( $range <= $total_records) {
          getstore("$url_to_process$suchbegriffe&a=$treffer&s=$range", 'processing.html') or die 'Unable to get page';
          $te->parse_file('processing.html');
          my ($table) = $te->tables;
          for my $row ( $table->rows ) {
             cleanup(@$row);
             print OUTFILE "@$row\n";
          }
          $| = 1; 
          print "Processed records $range to $counter";
          print "\r";
          $counter = $counter + 50;
          $range = $range + 50;
          $te = HTML::TableExtract->new;
       }
    }

    sub cleanup() {
       for ( @_ ) {
          s/s+/ /g;
       }
    }

    sub workDir() {
    # Use home directory to process data
    chdir or die "$!";
    if ( ! -d $processdir ) {
       mkdir ("$ENV{HOME}/$processdir", 0755) or die "Cannot make directory $processdir: $!";
       }
    }  

顺便说一句 - 请参阅分隔符的一个示例...：

my @cols = qw(
    rownum
    number
    name
    phone
    type
    website
);

my @fields = qw(
    rownum
    number
    name
    street
    postal
    town
    phone
    fax
    type
    website
);

注意：这源于一个用户，他在这个线程上给了我一些很好的提示。看 HTML::TableExtract: how to run the right argument [see live example]

嗯-我想将这些想法迁移到上面提到的蜘蛛和解析器中。这可能吗..你能给我一些提示如何添加一些代码行 - 以便结果以 csv 格式吐出......！？

任何和所有的帮助将不胜感激..

零

更新：按照muu的思路太短了……：

  #!/usr/bin/perl
    use strict;
    use warnings;
    use HTML::TableExtract;
    use LWP::Simple;
    use Text::CSV
    use Cwd;
    use POSIX qw(strftime);
    my $te = HTML::TableExtract->new;
    my $total_records = 0;
    my $suchbegriffe = "e";
    my $treffer = 50;
    my $range = 0;
    my $url_to_process = "http://192.68.214.70/km/asps/schulsuche.asp?q=";
    my $processdir = "processing";
    my $counter = 50;
    my $displaydate = "";
    my $percent = 0;

    &workDir();
    chdir $processdir;
    &processURL();
    print "\nPress <enter> to continue\n";
    <>;
    $displaydate = strftime('%Y%m%d%H%M%S', localtime);
    open OUTFILE, ">webdata_for_$suchbegriffe\_$displaydate.txt";
    &processData();
    close OUTFILE;
    print "Finished processing $total_records records...\n";
    print "Processed data saved to $ENV{HOME}/$processdir/webdata_for_$suchbegriffe\_$displaydate.txt\n";
    unlink 'processing.html';
    die "\n";

    sub processURL() {
    print "\nProcessing $url_to_process$suchbegriffe&a=$treffer&s=$range\n";
    getstore("$url_to_process$suchbegriffe&a=$treffer&s=$range", 'tempfile.html') or die 'Unable to get page';

       while( <tempfile.html> ) {
          open( FH, "$_" ) or die;
          while( <FH> ) {
             if( $_ =~ /^.*?(Treffer <b>)(d+)( - )(d+)(</b> w+ w+ <b>)(d+).*/ ) {
                $total_records = $6;
                print "Total records to process is $total_records\n";
                }
             }
             close FH;
       }
       unlink 'tempfile.html';
    }

    sub processData() {
       while ( $range <= $total_records) {
          getstore("$url_to_process$suchbegriffe&a=$treffer&s=$range", 'processing.html') or die 'Unable to get page';
          $te->parse_file('processing.html');
          my ($table) = $te->tables;
          for my $row ( $table->rows ) {
             cleanup(@$row);

            $csv->combine(@$row);
      print OUTFILE $csv->string();

          }
          $| = 1; 
          print "Processed records $range to $counter";
          print "\r";
          $counter = $counter + 50;
          $range = $range + 50;
          $te = HTML::TableExtract->new;
       }
    }


sub cleanup {
   for ( @_ ) {
      s/\s+/ /g;
   }
}
    sub workDir() {
    # Use home directory to process data
    chdir or die "$!";
    if ( ! -d $processdir ) {
       mkdir ("$ENV{HOME}/$processdir", 0755) or die "Cannot make directory $processdir: $!";
       }
    }  

更新：我做了一些试验：

martin@suse-linux:~/perl> perl perl_bayern_newstack.pl 不匹配（在 正则表达式；由

这里有什么问题...？

Answer 1

您应该使用Text::CSV 来构建您的输出，这样可以省去您手动处理嵌入引号和分隔符的麻烦。因此，使用您想要的选项创建Text::CSV 的实例并替换它：

print OUTFILE "@$row\n";

与

$csv->combine(@$row);
print OUTFILE $csv->string();

$csv 是您的 Text::CSV 实例。

另外，您的cleanup 函数有点损坏，应该是这样的：

sub cleanup {
   for ( @_ ) {
      s/\s+/ /g;
   }
}

缺少的\ 可能只是您粘贴代码时的拼写错误，但可能不是。

并且不要使用原型，它们不会做你可能认为他们会做的事情。你说的地方：

sub cleanup() {

只是说

sub cleanup {

除非你知道它的副作用是什么，否则不要调用带有前导符号的函数（即不要 &workDir();，只需 workDir(); 会这样做）。