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<h1>17. Internet Services</h1>
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<a name="nntpnewsgroups" />
<h2>17.4. NNTP Newsgroups</h2>
<a name="nntpclient" />
<h3>17.4.1. NNTP Client</h3>
<div class="funcsynopsis">
<div class="funcsynopsis">
<a name="fproto_nntp_get" />
<span class="funcdef">array <a href="fn_nntp_get.html">
<span class="function">nntp_get</span>
</a>
</span>
(<span class="paramdef">in <span class="parameter">server</span> varchar</span>,
<span class="paramdef">in <span class="parameter">command</span> varchar</span>,
<span class="paramdef">in <span class="parameter">group</span> varchar</span>,
<span class="paramdefoptional">[in <span class="optional">first_message</span> integer]</span>,
<span class="paramdefoptional">[in <span class="optional">last_message</span> integer]</span>);
</div>
</div>
<p>Returns information about an NNTP server.</p>
<a name="commandsandexamples" />
<h4>17.4.1.1. Commands and Examples</h4>
<p>
If the requested messages don't exist, <span class="computeroutput">nttp_get()</span>
returns NULL.
</p>
<p>
Get a list of all groups from the server 'news.openlinksw.com', port 119:
</p>
<a name="" />
<div class="example">
<div>
<pre class="programlisting">
nntp_get ('news.openlinksw.com:119', 'list');
</pre>
</div>
<p>
This call returns an array of the form
Array ((<group 1> varchar, <last message> integer, <first message> integer,
<posting allowed> varchar ) (<group 2> . . . . ) . . . )
</p>
<p>
ARTICLE, HEAD, BODY, STAT
To get the bodies of all messages in the group 'openlink.public.virtuoso':
</p>
<div>
<pre class="programlisting">
nntp_get ('news.openlinksw.com:119', 'body', 'openlink.public.virtuoso');
</pre>
</div>
<p>
This call returns an array of the form
Array ((<message number> integer, <body of message> blob) . . . )
</p>
<p>
To get the article (head + body) of messages numbered from 5 to 10 in the group 'openlink.public.virtuoso':
</p>
<div>
<pre class="programlisting">
nntp_get ('news.openlinksw.com:119', 'article', 'openlink.public.virtuoso', 5, 10);
</pre>
</div>
<p>
This call returns an array of the form
Array ((<message number> integer, <body of message> blob) . . . )
</p>
<p>
To get the headers of messages numbered from 7 to the end of the 'openlink.public.virtuoso' group:
</p>
<div>
<pre class="programlisting">
nntp_get ('news.openlinksw.com:119', 'head', 'openlink.public.virtuoso', 7);
</pre>
</div>
<p>
To get the status of all messages in the group 'openlink.public.virtuoso':
</p>
<div>
<pre class="programlisting">
nntp_get ('news.openlinksw.com:119', 'stat', 'openlink.public.virtuoso',);
</pre>
</div>
<p>
This call returns an array of the form
Array ((<message number> integer, <message ID> varchar) . . . )
</p>
<p>
To get the status of the 'openlink.public.virtuoso' group:
</p>
<div>
<pre class="programlisting">
nntp_get ('news.openlinksw.com:119', 'group', 'openlink.public.virtuoso');
</pre>
</div>
<p>
This call returns an array of the form
Array (<number of messages> integer, <first message> integer, <last message> integer)
</p>
</div>
<br />
<br />
<a name="newsserver" />
<h3>17.4.2. NNTP Server</h3>
<a name="newssrvenable" />
<h4>17.4.2.1. Enabling the NNTP Server</h4>
<p>The Virtuoso News Server listening port is configured in the HTTP section
of the virtuoso.ini file.</p>
<div>
<pre class="screen">[HTTPServer]
NewsServerPort = 119</pre>
</div>
<p>If the port is not defined Virtuoso will disable the News Server subsystem.</p>
<br />
<a name="newssrvcmds" />
<h4>17.4.2.2. NNTP Server Commands</h4>
<p>The server supports the following commands:</p>
<ul>
<li>article [MessageID|Number]</li>
<li>body [Number]</li>
<li>group newsgroup</li>
<li>head [Number]</li>
<li>help</li>
<li>last</li>
<li>list</li>
<li>mode reader</li>
<li>newgroups yymmdd hhmmss</li>
<li>next</li>
<li>post</li>
<li>xover [range]</li>
<li>stat [MessageID|Number]</li>
</ul>
<br />
<div class="tip">
<div class="tiptitle">See Also:</div>
<p>
<a href="systemtables.html#newssrvtables">News System Tables</a>
</p>
</div>
<a name="newssrvadd" />
<h4>17.4.2.3. Add Groups to NNTP Server</h4>
<p>To add a new newsgroup you must insert a row into the table
DB.DBA.NEWS_GROUPS. Below is an example of an insert statement that
you could use to do this:</p>
<div>
<pre class="programlisting">
insert into DB.DBA.NEWS_GROUPS (NG_NAME, NG_DESC, NG_UP_INT, NG_CLEAR_INT,
NG_POST, NG_UP_TIME, NG_OUT_GROUP, NG_NUM, NG_FIRST, NG_LAST,
NG_SERVER, NG_SERV_PORT, NG_CREAT, NG_UP_MESS, NG_PASS)
values ('openlink.public.virtuoso', 'virtuoso news group' ,
update interval, clear interval, 1, now(), 'openlink.public.virtuoso',
0, 0, 0, 'news.openlinksw.com', 110, now(), 0, 0);
</pre>
</div>
<p>If the group you want to add is local, change
<span class="computeroutput">news.openlinksw.com</span> to <span class="computeroutput">localhost</span>,
change the port to 0, and the <span class="computeroutput">external name</span> to
<span class="computeroutput">''</span> (that is, two single quotes).</p>
<p>See also the <a href="">
Newsgroups Administration</a> section of the Visual Server
Administration Interface.</p>
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