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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-->
<refentry id="fn_dns_txt_get">
<refmeta>
<refentrytitle>dns_txt_get</refentrytitle>
<refmiscinfo>ws</refmiscinfo>
</refmeta>
<refnamediv>
<refname>dns_txt_get</refname>
<refpurpose>Use for DNS text record retrieval.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_dns_txt_get">
<funcprototype id="fproto_dns_txt_get">
<funcdef>varchar <function>dns_txt_get</function></funcdef>
<paramdef>in <parameter>dns_serevr_ip_or_null</parameter> any</paramdef>
<paramdef>in <parameter>dns_entry</parameter> varchar</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_dns_txt_get">
<title>Description</title>
<para>This function can be used for DNS text record retrieval. It works on UNIX, Windows, Mac OS X w/o
additional libraries.
</para>
</refsect1>
<refsect1 id="params_dns_txt_get">
<title>Parameters</title>
<refsect2><title>dns_serevr_ip_or_null</title>
<para>DNS server IP or null. If null, then the system will try to find the system defined DNS servers.
First argument null together with <link linkend="fn_xenc_key_RSA_read"><function>xenc_key_RSA_read()</function></link> with 3d argument of 1 (int)
can be used to write a PL procedure for DKIM signature check of mails.</para>
</refsect2>
<refsect2><title>dns_entry</title>
<para>DNS entry.</para>
</refsect2>
</refsect1>
<refsect1 id="examples_dns_txt_get"><title>Examples</title>
<example id="ex_dns_txt_get"><title>Obtaining DNS text record</title>
<programlisting><![CDATA[
SELECT dns_txt_get (null, 'x._domainkey.example.com');
dns_txt_get
VARCHAR
_______________________________________________________________________________
v=DKIM1; k=rsa; p=...
]]></programlisting>
</example>
</refsect1>
<refsect1 id="seealso_dns_txt_get"><title>See Also</title>
<para>
<para><link linkend="fn_http"><function>http</function></link>,</para>
<para><link linkend="fn_http_client_ip"><function>http_client_ip</function></link>,</para>
<para><link linkend="fn_http_value"><function>http_value</function></link>,</para>
<para><link linkend="fn_http_url"><function>http_url</function></link>,</para>
<para><link linkend="fn_string_output"><function>string_output</function></link>,</para>
<para><link linkend="fn_http_acl_get"><function>http_acl_get</function></link>,</para>
<para><link linkend="fn_http_rewrite"><function>http_rewrite</function></link>.</para>
</para>
</refsect1>
</refentry>
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