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<link title="Netsmtp" rel="Chapter" href="Netsmtp.html"><title>Ocamlnet 2 Reference Manual : Nethttpd_engine.http_engine_config</title>
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<center><h1>Class type <a href="type_Nethttpd_engine.http_engine_config.html">Nethttpd_engine.http_engine_config</a></h1></center>
<br>
<pre><span class="keyword">class type</span> <a name="TYPEhttp_engine_config"></a>http_engine_config = <code class="code">object</code> <a href="Nethttpd_engine.http_engine_config.html">..</a> <code class="code">end</code></pre><b>Inherits</b><ul>
<li><a href="Nethttpd_reactor.http_processor_config.html"><code class="code">Nethttpd_reactor.http_processor_config</code></a></li>
</ul>
<hr width="100%">
<pre><span class="keyword">method</span> <a name="METHODconfig_input_flow_control"></a>config_input_flow_control : <code class="type">bool</code></pre><div class="info">
If <code class="code">true</code>, the engine stops reading input tokens from the HTTP kernel when
there is data in the input channel of the engine not yet read. If <code class="code">false</code>,
all available input tokens are fetched from the kernel and buffered up
in the input channel.
<p>
In general, this <b>should</b> be set to <code class="code">true</code>. However, this is only possible
when the user of the engine is prepared for flow control. In particular,
all data contained in the input channel must be immediately read, or else
the engine blocks. By calling <code class="code">input_ch_async # request_notification</code>, the
user can be notified when there is data to read.
<p>
When set to <code class="code">false</code>, the engine never blocks, but the price is that the
input channel may become as large as needed to store the whole request.
<p>
The option <code class="code">config_limit_pipeline_size</code> does not have any effect for engines.<br>
</div>
<pre><span class="keyword">method</span> <a name="METHODconfig_output_flow_control"></a>config_output_flow_control : <code class="type">bool</code></pre><div class="info">
If <code class="code">true</code>, the engine signals the user when there is already enough data
to output, and no more output should be generated. The user can query
this state by calling <code class="code">output_ch_async # can_output</code>, and react
accordingly. The user can also ignore this signal, and the output channel
buffers all data.
<p>
If <code class="code">false</code>, the mentioned method <code class="code">can_output</code> returns always <code class="code">true</code>. This
turns off flow control in the case it is implemented by the user of the
engine, but actually not wanted.
<p>
The internal processing of data is not affected by this configuration option.
In doubt, set it to <code class="code">true</code>.<br>
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