У меня есть пример, где я пытаюсь удалить все строки файла, где он пуст (только новая строка или пробелы и новая строка). Я думал, что смогу сделать это легко с простым ^\s*$. У меня есть образец файла длиной 724 строки с 182 экземплярами этого шаблона, когда я использую grep -e '^\s*$' samplefile | wc -l, и я могу просто добавить флаг -v и перенаправить вывод, чтобы получить содержимое с удаленными дополнительными строками.
В Go 1.12.4 я пытаюсь:
dat, _ := ioutil.ReadFile("./samplefile")
ioutil.WriteFile("eventbody", []byte(strings.Split(string(dat), "</head>")[1]), 0555)
regNewline := regexp.MustCompile(`(?ms)^\s*$`)
d := regNewline.ReplaceAll(dat, []byte(""))
ioutil.WriteFile("./emptyremoved", d, 0555)
И в результате получается 143 случая, которые стесняются делать то, что я хочу. Пример файла - это страница размером HTML. Сначала я сделал это по той причине, что не смог заставить пакет golang.org/x/net/html проанализировать HTML и пройти по токенам, чтобы получить нужные мне данные (строки таблицы), и остановился на некотором повторе, чтобы попытаться решить моя проблема, но я все еще в тупике.
Пример файла:
<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>SourceManagementboard</title>
<style>
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 400;
src: local('Open Sans'), local('OpenSans'), url(/static/fonts/Open_Sans.woff) format('woff');
}
input[type=text] {
width: 130px;
border: 2px solid #f96302;
-webkit-transition: width 0.4s ease-in-out;
transition: width 0.4s ease-in-out;
}
input[type=text]:focus {
width: 270px;
}
</style>
<link href='//fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css' />
<link href="/static/Semantic-UI-2.1.8/semantic.min.css" rel="stylesheet" />
<link href='//cdnjs.cloudflare.com/ajax/libs/datatables/1.10.13/css/dataTables.semanticui.min.css' rel='stylesheet' type='text/css'>
<link href="/static/css/c3.min.css" rel="stylesheet" />
<link href="/static/css/SourceManagementboard.css" rel="stylesheet" />
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/datatables/1.10.13/js/jquery.dataTables.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/datatables/1.10.13/js/dataTables.semanticui.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.7.0/moment.min.js"></script>
<script src="/static/js/timestamps.js"></script>
<script src="/static/Semantic-UI-2.1.8/semantic.min.js"></script>
<script src="/static/js/lists.js"></script>
<script src="/static/js/scroll.top.js"></script>
<script src="/static/js/d3.min.js"></script>
<script src="/static/js/c3.min.js"></script>
<script src="/static/jquery-tablesort-v.0.0.11/jquery.tablesort.min.js"></script>
<script src="/static/js/Chart.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".ui.dropdown").dropdown();
$.getScript('/static/js/lists.js')
$.getScript('/static/js/tables.js')
})
</script>
<script type="text/javascript">
function jumpToServerPage() {
var myserver = document.getElementById("serverJump").value;
if (myserver == "*.foo.com"){
var jumpto = "/node/" + myserver;
window.location = jumpto;
else {
var jumpto = "/node/" + myserver + ".foo.com";
window.location = jumpto;
}
}
</script>
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</head>
<body>
<div class="ui doubling stackable inverted large menu" style="margin-top: 0px; margin-bottom: 20px;">
<div class="title item" style="margin-top: 0px; margin-bottom: 0px;">
<a href="/">
<img src="/static/icons/fldlogo.svg">
</a>
</div>
<a class="item" href="/">Report Board</a>
<a class="item" href="/search">StackRepo</a>
<a class="item" href="/validate">Validate Info</a>
<a class="item" href="/patching">Patching Status</a>
<div class="ui item dropdown">More<i class="dropdown icon"></i>
<div class="menu">
<a class="item" href="/nodes">Nodes</a>
<a class="item" href="/"></a>
<a class="item" href="/reports">Reports</a>
<a class="item" href="/metrics">Metrics</a>
<a class="item" href="/inventory">Inventory</a>
<a class="item" href="/catalogerrors">Catalog Errors</a>
<a class="item" href="/radiator">Radiator</a>
<a class="item" href="/query">Query</a>
<a class="item" href="/module">Module Reporting</a>
<a class="item" href="/grid_versions">Grid Versions</a>
<a class="item" href="/summary">Core State</a>
</div>
</div>
<form method="POST" class="item" action="/serverjump" name="serverjump">
<input class="item" type="submit" value="Go" style="background-color: #f96302; color: black;">
<input class="item" style="color: orange;" id="server_name" name="server_name"
type="text" placeholder="Jump to a Server info page" value="">
</form>
<div class="item right">
<div class="ui item dropdown">
<b>S</b>
<i class="dropdown icon"></i>
<div class="menu">
<a class="item " href="/%2A/report/myserv.foo.com/58964efb70ab87610ff4ce3fdbf46ce7dea54dac">All servers</a>
<a class="item "
href="/production/report/myserv.foo.com/58964efb70ab87610ff4ce3fdbf46ce7dea54dac">Datacenter</a>
<a class="item active"
href="/report/myserv.foo.com/58964efb70ab87610ff4ce3fdbf46ce7dea54dac">S</a>
</div>
</div>
</div>
</div>
<div class="ui grid padding-bottom">
<div class="one wide column"></div>
<div class="fourteen wide column">
<h1>Summary</h1>
<table class='ui basic table'>
<thead>
<tr>
<th>Certname</th>
<th>Configuration version</th>
<th>Start time</th>
<th>End time</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="/node/myserv.foo.com">myserv.foo.com</a></td>
<td>
<p>1581366405</p>
</td>
<td rel="utctimestamp">
2020-02-10 20:26:02.286000+00:00
</td>
<td rel="utctimestamp">
2020-02-10 20:27:33.971000+00:00
</td>
</tr>
</tbody>
</table>
<style>
.button {
display: inline-block;
border-radius: 4px;
background-color: #f4511e;
border: none;
color: #FFFFFF;
transition: all 0.5s;
cursor: pointer;
}
.button span {
cursor: pointer;
display: inline-block;
position: relative;
transition: 0.5s;
}
.button span:after {
content: '»';
position: absolute;
opacity: 0;
top: 0;
right: -20px;
transition: 0.5s;
}
.button:hover span {
padding-right: 25px;
}
.button:hover span:after {
opacity: 1;
right: 0;
}
</style>
<h1>Events <a href="/download_report/myserv.foo.com/58964efb70ab87610ff4ce3fdbf46ce7dea54dac/events"><button style="float: right;" class="ui grey button"><span>Download</span></button></a></h1>
<table class='ui basic compact fixed wrapped table'>
<thead>
<tr>
<th class="eight wide">Resource</th>
<th class="two wide">Status</th>
<th class="two wide">Changed From</th>
<th class="four wide">Changed To</th>
</tr>
</thead>
<tbody>
<tr id='event-1' class='ui line changed'>
<td>Exec[/bin/ksh -c 'source /usr/local/bin/src.host; /opt/sr/su/bin/sr-db-sc 1249 N COM']</td>
<td>success</td>
<td>notrun</td>
<td>[u'0']</td>
</tr>
<tr id='event-2' class='ui line failed'>
<td>Package[sr-kd-if]</td>
<td>failure</td>
<td>1.22-1</td>
<td>2.0-2</td>
</tr>
<tr id='event-3' class='ui line changed'>
<td>Exec[yum_trex reconfig]</td>
<td>success</td>
<td>notrun</td>
<td>[u'0']</td>
</tr>
<tr id='event-4' class='ui line changed'>
<td>Exec[yum_trex config]</td>
<td>success</td>
<td>notrun</td>
<td>[u'0']</td>
</tr>
<tr id='event-5' class='ui line changed'>
<td>Exec[rpm_import_stflag]</td>
<td>success</td>
<td>notrun</td>
<td>[u'0']</td>
</tr>
<tr id='event-6' class='ui line changed'>
<td>Exec[RK sed on agent_flag]</td>
<td>success</td>
<td>notrun</td>
<td>[u'0']</td>
</tr>
</tbody>
</table>
<h1>Logs <a href="/download_report/myserv.foo.com/58964efb70ab87610ff4ce3fdbf46ce7dea54dac/logs"><button style="float: right;" class="ui grey button"><span>Download</span></button></a></h1>
<table class='ui basic compact fixed wrapped table'>
<thead>
<tr>
<th>Timestamp</th>
<th>Source</th>
<th>Tags</th>
<th>Message</th>
<th>Location</th>
<tr>
</thead>
<tbody>
<tr class='warning'>
<td rel="utctimestamp">2020-02-10T15:26:07.109-05:00</td>
<td>SourceManagement</td>
<td>warning</td>
<td>Unable to fetch my node definition, but the agent run will continue:</td>
<td></td>
</tr>
<tr class='warning'>
<td rel="utctimestamp">2020-02-10T15:26:07.109-05:00</td>
<td>SourceManagement</td>
<td>warning</td>
<td>Could not intern from application/json: Could not find a directory environment named 'env' anywhere in the path: /etc/SourceManagement/code/environments. Does the directory exist?</td>
<td></td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:26:07.110-05:00</td>
<td>SourceManagement</td>
<td>info</td>
<td>Retrieving plugin</td>
<td></td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:26:07.326-05:00</td>
<td>SourceManagement</td>
<td>info</td>
<td>Retrieving plugin</td>
<td></td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:26:08.349-05:00</td>
<td>SourceManagement</td>
<td>info</td>
<td>Retrieving locales</td>
<td></td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:26:08.572-05:00</td>
<td>SourceManagement</td>
<td>info</td>
<td>Loading </td>
<td></td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:19.334-05:00</td>
<td>SourceManagement</td>
<td>info</td>
<td>Caching catalog for myserv.foo.com</td>
<td></td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:20.824-05:00</td>
<td>SourceManagement</td>
<td>info</td>
<td>Applying configuration version '1581366405'</td>
<td></td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:26.979-05:00</td>
<td>/Stage[main]/RK::V1_0_1/Exec[RK sed on agent_flags.conf]/returns</td>
<td>notice, exec, class, rk::v1_0_1, rk, v1_0_1</td>
<td>executed successfully</td>
<td>/etc/SourceManagement/code/environments/env/modules/rk/manifests/v1_0_1.pp:25</td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:26.980-05:00</td>
<td>/Stage[main]/RK::V1_0_1/Exec[RK sed on agent_flags.conf]</td>
<td>info, exec, class, rk::v1_0_1, rk, v1_0_1</td>
<td>Scheduling refresh of Service[rkagents]</td>
<td>/etc/SourceManagement/code/environments/env/modules/rk/manifests/v1_0_1.pp:25</td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:27.492-05:00</td>
<td>/Stage[main]/RK::V1_0_1/Service[rkagents]</td>
<td>notice, service, rkagents, class, rk::v1_0_1, rk, v1_0_1</td>
<td>Triggered 'refresh' from 1 event</td>
<td>/etc/SourceManagement/code/environments/env/modules/rk/manifests/v1_0_1.pp:33</td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:29.030-05:00</td>
<td>/Stage[main]/tr::V1_0_5::Config/Exec[rpm_import_tr]/returns</td>
<td>notice, exec, rpm_import_tr, class, tr::v1_0_5::config, tr, v1_0_5, config, tr::v1_0_5</td>
<td>executed successfully</td>
<td>/etc/SourceManagement/code/environments/env/modules/tanium/manifests/v1_0_5/config.pp:40</td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:35.083-05:00</td>
<td>/Stage[main]/Toolrental_trex_svc/Exec[yum_trex config]/returns</td>
<td>notice, exec, class, toolrental_trex_svc</td>
<td>executed successfully</td>
<td>/etc/SourceManagement/code/environments/env/modules/toolrental_trex_svc/manifests/init.pp:7</td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:35.101-05:00</td>
<td>/Stage[main]/Toolrental_trex_svc/Exec[yum_trex reconfig]/returns</td>
<td>notice, exec, class, toolrental_trex_svc</td>
<td>executed successfully</td>
<td>/etc/SourceManagement/code/environments/env/modules/toolrental_trex_svc/manifests/init.pp:17</td>
</tr>
<tr class='error'>
<td rel="utctimestamp">2020-02-10T15:27:40.113-05:00</td>
<td>SourceManagement</td>
<td>err</td>
<td>Could not update: Execution of '/usr/bin/yum -d 0 -e 0 -y update sr-kd-if-2.0-2' returned 1: Error Downloading Packages:
jq-1.3-2.el6.x86_64: failed to retrieve getPackage/jq-1.3-2.el6.x86_64.rpm from rhel-x86_64-server-6-s-epel
error was [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 500 Internal Server Error"
sr-kd-if-2.0-2.x86_64: failed to retrieve getPackage/sr-kd-if-2.0-2.x86_64.rpm from rhel-x86_64-server-6-s-deploy
error was [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 500 Internal Server Error"</td>
<td></td>
</tr>
<tr class='error'>
<td rel="utctimestamp">2020-02-10T15:27:40.117-05:00</td>
<td>/Stage[main]/sr-kd-if::V2_0/Package[sr-kd-if]/ensure</td>
<td>err, package, sr-kd-if, class, sr-kd-if::v2_0, sr-kd-if, v2_0</td>
<td>change from '1.22-1' to '2.0-2' failed: Could not update: Execution of '/usr/bin/yum -d 0 -e 0 -y update sr-kd-if-2.0-2' returned 1: Error Downloading Packages:
jq-1.3-2.el6.x86_64: failed to retrieve getPackage/jq-1.3-2.el6.x86_64.rpm from rhel-x86_64-server-6-s-epel
error was [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 500 Internal Server Error"
sr-kd-if-2.0-2.x86_64: failed to retrieve getPackage/sr-kd-if-2.0-2.x86_64.rpm from rhel-x86_64-server-6-s-deploy
error was [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 500 Internal Server Error"</td>
<td>/etc/SourceManagement/code/environments/env/modules/sr-kd-if/manifests/v2_0.pp:2</td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:55.695-05:00</td>
<td>/Stage[main]/Com::Ismt/fld::Ismt[1249 COM]/Exec[/bin/ksh -c 'source /usr/local/bin/src.host; /opt/hd/su/bin/sr-db-sc 1249 N COM']/returns</td>
<td>notice, exec, fld::ismt, fld, ismt, class, com::ismt, com, fld::catalog, catalog, com::pr::v19_11_2, pr, v19_11_2</td>
<td>executed successfully</td>
<td>/etc/SourceManagement/code/environments/env/modules/fld/manifests/ismt.pp:7</td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:55.696-05:00</td>
<td>/Stage[main]/Com::Ismt/fld::Ismt[1249 COM]/Exec[/bin/ksh -c 'source /usr/local/bin/src.host; /opt/hd/su/bin/sr-db-sc 1249 N COM']</td>
<td>info, exec, fld::ismt, fld, ismt, class, com::ismt, com, fld::catalog, catalog, com::pr::v19_11_2, pr, v19_11_2</td>
<td>Scheduling refresh of Exec[/bin/chown pris01:dbaccgrp /opt/hd/su/tmp/*]</td>
<td>/etc/SourceManagement/code/environments/env/modules/fld/manifests/ismt.pp:7</td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:55.905-05:00</td>
<td>/Stage[main]/Ismt_2615_pp::V1_0_0/fld::Ismt[ismt_2615]/Exec[/bin/chown pris01:dbaccgrp /opt/hd/su/tmp/*]</td>
<td>notice, exec, fld::ismt, fld, ismt, ismt_2615, class, ismt_2615_pp::v1_0_0, ismt_2615_pp, v1_0_0</td>
<td>Triggered 'refresh' from 1 event</td>
<td>/etc/SourceManagement/code/environments/env/modules/fld/manifests/ismt.pp:22</td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:56.069-05:00</td>
<td>Stage[main]</td>
<td>info, stage</td>
<td>Unscheduling all events on Stage[main]</td>
<td></td>
</tr>
<tr class='positive'>
<td rel="utctimestamp">2020-02-10T15:27:56.404-05:00</td>
<td>SourceManagement</td>
<td>notice</td>
<td>Applied catalog in 35.89 seconds</td>
<td></td>
</tr>
</tbody>
</table>
<h1>Metrics <a href="/download_report/myserv.foo.com/58964efb70ab87610ff4ce3fdbf46ce7dea54dac/metrics"><button style="float: right;" class="ui grey button"><span>Download</span></button></a></h1>
<table class="ui basic table compact">
<thead>
<tr>
<th>Category</th>
<th>Name</th>
<th>Value</th>
</tr>
</thead>
<tbody>
<tr>
<td>resources</td>
<td>changed</td>
<td>5.0</td>
</tr>
<tr>
<td>resources</td>
<td>corrective_change</td>
<td>5.0</td>
</tr>
<tr>
<td>resources</td>
<td>failed</td>
<td>1.0</td>
</tr>
<tr>
<td>resources</td>
<td>failed_to_restart</td>
<td>0.0</td>
</tr>
<tr>
<td>resources</td>
<td>out_of_sync</td>
<td>6.0</td>
</tr>
<tr>
<td>resources</td>
<td>restarted</td>
<td>2.0</td>
</tr>
<tr>
<td>resources</td>
<td>scheduled</td>
<td>0.0</td>
</tr>
<tr>
<td>resources</td>
<td>skipped</td>
<td>0.0</td>
</tr>
<tr>
<td>resources</td>
<td>total</td>
<td>754.0</td>
</tr>
<tr>
<td>time</td>
<td>config_retrieval</td>
<td>60.69</td>
</tr>
<tr>
<td>time</td>
<td>cron</td>
<td>0.01</td>
</tr>
<tr>
<td>time</td>
<td>exec</td>
<td>7.89</td>
</tr>
<tr>
<td>time</td>
<td>file</td>
<td>6.95</td>
</tr>
<tr>
<td>time</td>
<td>file_line</td>
<td>0.01</td>
</tr>
<tr>
<td>time</td>
<td>filebucket</td>
<td>0.0</td>
</tr>
<tr>
<td>time</td>
<td>filesystem</td>
<td>0.01</td>
</tr>
<tr>
<td>time</td>
<td>logical_volume</td>
<td>2.35</td>
</tr>
<tr>
<td>time</td>
<td>mount</td>
<td>0.0</td>
</tr>
<tr>
<td>time</td>
<td>package</td>
<td>13.01</td>
</tr>
<tr>
<td>time</td>
<td>pe_anchor</td>
<td>0.0</td>
</tr>
<tr>
<td>time</td>
<td>service</td>
<td>0.76</td>
</tr>
<tr>
<td>time</td>
<td>total</td>
<td>91.69</td>
</tr>
<tr>
<td>time</td>
<td>user</td>
<td>0.0</td>
</tr>
<tr>
<td>changes</td>
<td>total</td>
<td>5.0</td>
</tr>
<tr>
<td>events</td>
<td>failure</td>
<td>1.0</td>
</tr>
<tr>
<td>events</td>
<td>success</td>
<td>5.0</td>
</tr>
<tr>
<td>events</td>
<td>total</td>
<td>6.0</td>
</tr>
</tbody>
</table>
</div>
<div class="one wide column"></div>
</div>
<div id="scroll-btn-top">
<i class="large arrow up icon"></i>
</div>
</body>
</html>
РЕДАКТИРОВАТЬ:
Последние 25 строк файла после grep -v -e '^\s*$' samplefile
<tr>
<td>changes</td>
<td>total</td>
<td>5.0</td>
</tr>
<tr>
<td>events</td>
<td>failure</td>
<td>1.0</td>
</tr>
<tr>
<td>events</td>
<td>success</td>
<td>5.0</td>
</tr>
<tr>
<td>events</td>
<td>total</td>
<td>6.0</td>
</tr>
</tbody>
</table>
</div>
<div class="one wide column"></div>
</div>
<div id="scroll-btn-top">
<i class="large arrow up icon"></i>
</div>
</body>
</html>
Последние 25 строк файла после Go пример кода:
<tr>
<td>events</td>
<td>success</td>
<td>5.0</td>
</tr>
<tr>
<td>events</td>
<td>total</td>
<td>6.0</td>
</tr>
</tbody>
</table>
</div>
<div class="one wide column"></div>
</div>
<div id="scroll-btn-top">
<i class="large arrow up icon"></i>
</div>
</body>
</html>