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<link title="Netsmtp" rel="Chapter" href="Netsmtp.html"><title>Ocamlnet 2 Reference Manual : Netstream.sub_stream</title>
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<center><h1>Class <a href="type_Netstream.sub_stream.html">Netstream.sub_stream</a></h1></center>
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<pre><span class="keyword">class</span> <a name="TYPEsub_stream"></a>sub_stream : <code class="type">?len:int -> ?delimiter:string -> <a href="Netstream.in_obj_stream.html">in_obj_stream</a> -> </code><code class="type"><a href="Netstream.in_obj_stream.html">in_obj_stream</a></code></pre>A sub stream is the part of the whole stream from the current position
to an arbitrary other position that is determined by <code class="code">len</code> and
<code class="code">delimiter</code>. <code class="code">len</code> specifies the maximum length of the sub stream.
<code class="code">delimiter</code> is an arbitrary string that indicates the end of the
sub stream (the delimiter is not part of the sub stream; i.e. the
sub stream ends immediately before the delimiter).
<p>
While reading from the sub stream, not only the current position of
the sub stream moves, but also the current position of the main
stream. This means that it must be avoided to read data from the
main stream while the sub stream is in use. The typical pattern
is:<ul>
<li>Read from the main stream until the beginning of a section is
recognized</li>
<li>Create a sub stream at this point</li>
<li>Read from the sub stream until EOF</li>
<li>Continue reading the main stream. The next character of the main
stream is exactly the character following the EOF of the sub stream</li>
</ul>
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