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我想用 munin 监控我的 oki 打印机，所以我试图让这个插件适应我的打印机。

我的打印机 http 服务器中的页表是：

<table width="560" border="0" cellspacing="2" cellpadding="3">
    <tr class="sub_item_color">
        <td  class="normal" width="200" align="right" valign="bottom" rowspan="2">Media Size</td>
        <td  class="normal" width="90" align="left">Color</td>
        <td  class="normal" width="90" align="left">Color</td>
        <td  class="normal" width="90" align="left">Mono</td>
        <td  class="normal" width="90" align="left">Mono</td>
    </tr>
    <tr class="sub_item_color">
        <td  class="normal" width="90" align="left">A3/Tabloid</td>
        <td  class="normal" width="90" align="left">A4/Letter</td><td  class="normal" width="90" align="left">A3/Tabloid</td>
        <td  class="normal" width="90" align="left">A4/Letter</td>
    </tr>
    <tr class="sub_item_color">
        <td  class="normal" width="200" align="left">Total Impressions</td>
        <td  class="normal" width="90" align="right">21906</td>
        <td  class="normal" width="90" align="right">33491</td>
        <td  class="normal" width="90" align="right">2084</td>
        <td  class="normal" width="90" align="right">4460</td>
    </tr>
    <tr class="sub_item_color">
        <td  class="normal" width="200" align="left">Total A4/Letter Impressions</td>
        <td  class="normal" colspan="2" align="center"><b>Color:77303</B></td>
        <td  class="normal" colspan="2" align="center"><b>Mono:8628</B></td>
    </tr>
</table>

该 munin 脚本正在执行此操作：

infopage=`wget -q -O - http://root:$password@$destination/printer/printerinfo_top.htm | perl -p -e 's/\n/ /m'`
echo tray1.value    `echo $infopage | perl -p -e 's/^.+Tray\ 1\ Page\ Count\:\ \<\/TD\>\<TD\ WIDTH\=\"94\"\>([0-9]+)\<.+$/$1/'`

我怎样才能获得总印象数？

4

1 回答 1

9

解决方案实现为问题中的 Unix 过滤器，多亏了 XPath，它才更具可读性和声明性。

#!/usr/bin/env perl
use 5.010;
use strictures;
use HTML::TreeBuilder::XPath qw();
use List::Util qw(sum);
my $tree = HTML::TreeBuilder::XPath->new;
$tree->parse_content(<>);
say sum map { s[.*:][]; $_ } $tree->findnodes_as_strings('//table/tr/td[@colspan=2]/b');

wget -q -O - http://… | perl sum-total-impressions.pl
于 2010-11-12T11:26:34.233 回答