TreeBuilder获取嵌入式节点

本文介绍了TreeBuilder获取嵌入式节点的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 基本上，我需要从HTML代码中获取所有这些人的姓名和电子邮件。

< thead> ; < tr> < th scope =colclass =rgHeaderstyle =text-align：center;> Name< th>< th scope =colclass =rgHeaderstyle = text-align：center;>电子邮件地址< / th>< th scope =colclass =rgHeaderstyle =text-align：center;> School Phone< / th> < / tr> < / thead>< tbody> < tr class =rgRowid =ctl00_ContentPlaceHolder1_rg_People_ctl00__0> < td> Michael Bowen < / td>< td> mbowen@cpcisd< / td>< td> 903-488-3671 ext3200< / td> < / tr>< tr class =rgAltRowid =ctl00_ContentPlaceHolder1_rg_People_ctl00__1> < td> Christian Calixto < / td>< td> calixtoc@cpcisd< / td>< td> 903-488-3671 x 3430< / td> < / tr>< tr class =rgRowid =ctl00_ContentPlaceHolder1_rg_People_ctl00__2> < td> Rachel Claxton < / td>< td> claxtonr@cpcisd< td>< td> 903-488-3671 x 3450< / td> < / tr> < / tbody> < / table>< input id =ctl00_ContentPlaceHolder1_rg_People_ClientStatename =ctl00_ContentPlaceHolder1_rg_People_ClientStatetype =hiddenautocomplete =off> < / DIV> < br>

我知道如何在节点等处使用treebuilder，并且我在一些我的脚本。

my（$ file）= @_; my $ html = path（$ file） - >啜; my $ tree = HTML :: TreeBuilder-> new_from_content（$ html）; my @nodes = $ tree-> look_down（_tag =>'input'）; my $ val; foreach my $ node（@nodes）{ $ val = $ node-> look_down（'name'，qr / \ $ txt_Website /） - > attr（'value'）; } return $ val;

我打算为这个函数使用相同的代码，但是我意识到我没有因为< td> 标签在脚本中的很多其他地方。我相信有更好的方法来处理这个问题，但我似乎无法找到它。

链接到HTML代码： pastebin/qLwu80ZW

我的代码： pastebin/wGb0eXmM

注意：我确实尽可能在谷歌上查看，但我不太确定我应该搜索什么。

包含所需数据的表元素具有唯一的类 rgMasterTable 所以你可以在 look_down

中搜索。它直接从你的pastebin中提取HTML。

use strict; 使用警告'all'; 使用LWP :: Simple'get'; 使用HTML :: TreeBuilder; 使用常量URL => pastebin/raw/qLwu80ZW; my $ tree = HTML :: TreeBuilder-> new_from_content（get URL）; my（$ table）= $ tree-> look_down（_tag =>'table'，class =>'rgMasterTable'）; for my $ tr（$ table-> look_down（_tag =>'tr'））{ next，除非我的@td = $ tr-> look_down （_tag =>'td'）; my（$ name，$ email）= map {$ _-> as_trimmed_text} @td [0,1]; printf％-17s％s \\\，$ name，$ email; }

输出

Michael Bowen mbowen@cpcisd Christian Calixto calixtoc@cpcisd Rachel Claxton claxtonr@cpcisd

Basically, I need to get the names and emails from all of these people in the HTML code.

<thead> <tr> <th scope="col" class="rgHeader" style="text-align:center;">Name</th><th scope="col" class="rgHeader" style="text-align:center;">Email Address</th><th scope="col" class="rgHeader" style="text-align:center;">School Phone</th> </tr> </thead><tbody> <tr class="rgRow" id="ctl00_ContentPlaceHolder1_rg_People_ctl00__0"> <td> Michael Bowen </td><td>mbowen@cpcisd</td><td>903-488-3671 ext3200</td> </tr><tr class="rgAltRow" id="ctl00_ContentPlaceHolder1_rg_People_ctl00__1"> <td> Christian Calixto </td><td>calixtoc@cpcisd</td><td>903-488-3671 x 3430</td> </tr><tr class="rgRow" id="ctl00_ContentPlaceHolder1_rg_People_ctl00__2"> <td> Rachel Claxton </td><td>claxtonr@cpcisd</td><td>903-488-3671 x 3450</td> </tr> </tbody> </table><input id="ctl00_ContentPlaceHolder1_rg_People_ClientState" name="ctl00_ContentPlaceHolder1_rg_People_ClientState" type="hidden" autocomplete="off"> </div> <br>

I know how to use treebuilder with the nodes and such, and I'm using this code in some of my script.

my ($file) = @_; my $html = path($file)-> slurp; my $tree = HTML::TreeBuilder->new_from_content($html); my @nodes = $tree->look_down(_tag => 'input'); my $val; foreach my $node (@nodes) { $val = $node->look_down('name', qr/\$txt_Website/)->attr('value'); } return $val;

I was going to use the same code for this function, but I realized that I don't have much to search for, since the <td> tag is in so many other places in the script. I'm sure there's a better way to approach this problem, but I can't seem to find it.

LINK TO HTML CODE: pastebin/qLwu80ZW

MY CODE: pastebin/wGb0eXmM

Note: I did look on google as much as possible, but I'm not quite sure what I should search for.

解决方案

The table element that encloses the data you need has a unique class rgMasterTable so you can search for that in look_down

I've written this to demonstrate. It pulls the HTML directly from your pastebin

use strict; use warnings 'all'; use LWP::Simple 'get'; use HTML::TreeBuilder; use constant URL => 'pastebin/raw/qLwu80ZW'; my $tree = HTML::TreeBuilder->new_from_content(get URL); my ($table) = $tree->look_down(_tag => 'table', class => 'rgMasterTable'); for my $tr ( $table->look_down(_tag => 'tr') ) { next unless my @td = $tr->look_down(_tag => 'td'); my ($name, $email) = map { $_->as_trimmed_text } @td[0,1]; printf "%-17s %s\n", $name, $email; }

output

Michael Bowen mbowen@cpcisd Christian Calixto calixtoc@cpcisd Rachel Claxton claxtonr@cpcisd