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<article class="contentwrapper ls-col-3-5 clearfix"><div
class="nav-bar ls-spacer-micro-top"><div
class="prev">&#171 <a
href="External_Servlet.html">Servlet
Engine</a></div><div class="center"><a
href="ExtApp_Help.html">External
Apps</a></div><div class="next"><a
href="External_PL.html">Piped Logger</a>
&#187;</div></div>
<h1>Web Server</h1><h2 id="top">Table of
Contents</h2><section class="toc"><section
class="toc-row"><header>Web
Server</header><p>
<a href="#extAppName">Name</a> | <a
href="#expWSAddress">Address</a> | <a
href="#maxConns">Max Connections</a> | <a
href="#pcKeepAliveTimeout">Connection Keepalive
Timeout</a> | <a href="#env">Environment</a> |
<a href="#initTimeout">Initial Request Timeout
(secs)</a> | <a href="#retryTimeout">Retry Timeout
(secs)</a> | <a href="#respBuffer">Response
Buffering</a></p></section>
</section>
<section><div class="helpitem"><article
class="ls-helpitem"><div><header
id="extAppName"><h3>Name<span
class="ls-permlink"><a
href="#extAppName"></a></span><span
class="top"><a
href="#top">&#8657;</a></span></h3></header></div><h4>Description</h4><p>A
unique name for this external application. You will refer to it by this
name when you use it in other parts of the configuration.</p>
</article> </div>
<div class="helpitem"><article
class="ls-helpitem"><div><header
id="expWSAddress"><h3>Address<span
class="ls-permlink"><a
href="#expWSAddress"></a></span><span
class="top"><a
href="#top">&#8657;</a></span></h3></header></div><h4>Description</h4><p>HTTP,HTTPS,
or Unix Domain Sockets (UDS) address used by the external web
server.</p> <h4>Syntax</h4><p>IPv4/IPv6
address(:port), UDS://path, or unix:path. Add "https://" in front
of an IPv4/IPv6 address if the external web server uses HTTPS. Port is
optional for IPv4/IPv6 addresses if the external web server uses the
standard ports 80 or 443.</p> <h4>Example</h4><div
class="ls-example">192.168.0.10<br/>
127.0.0.1:5434<br/> https://10.0.8.9<br/>
https://127.0.0.1:5438<br/> UDS://tmp/lshttpd/php.sock<br/>
unix:/tmp/lshttpd/php.sock</div><h4>Tips</h4><p><span
title="Security"
class="ls-icon-security"></span> If you proxy to another
web server running on the same machine using an IPv4/IPv6 address, set the
IP address to <span class="val">localhost</span> or
<span class="val">127.0.0.1</span>, so the external
application is inaccessible from other machines.<br/> <span
title="Performance"
class="ls-icon-performance"></span> Unix Domain Sockets
generally provide higher performance than IPv4 or IPv6 sockets.</p>
</article> </div>
<div class="helpitem"><article
class="ls-helpitem"><div><header
id="maxConns"><h3>Max Connections<span
class="ls-permlink"><a
href="#maxConns"></a></span><span
class="top"><a
href="#top">&#8657;</a></span></h3></header></div><h4>Description</h4><p>Specifies
the maximum number of concurrent connections that can be established
between the server and an external application. This setting controls how
many requests can be processed concurrently by an external application,
however, the real limit also depends on the external application itself.
Setting this value higher will not help if the external application is not
fast enough or cannot scale to a large number of concurrent
requests.</p> <h4>Syntax</h4><p>Integer
number</p> <h4>Tips</h4><p><span
title="Performance"
class="ls-icon-performance"></span> Setting a high value
does not directly translate to higher performance. Setting the limit to a
value that will not overload the external application will provide the best
performance/throughput.</p> </article> </div>
<div class="helpitem"><article
class="ls-helpitem"><div><header
id="pcKeepAliveTimeout"><h3>Connection Keepalive
Timeout<span class="ls-permlink"><a
href="#pcKeepAliveTimeout"></a></span><span
class="top"><a
href="#top">&#8657;</a></span></h3></header></div><h4>Description</h4><p>Specifies
the maximum time in seconds to keep an idle persistent connection
open.<br/><br/> When set to "-1", the connection will
never timeout. When set to 0 or greater, the connection will be closed
after this time in seconds has passed.</p>
<h4>Syntax</h4><p>int</p> </article>
</div>
<div class="helpitem"><article
class="ls-helpitem"><div><header
id="env"><h3>Environment<span
class="ls-permlink"><a
href="#env"></a></span><span
class="top"><a
href="#top">&#8657;</a></span></h3></header></div><h4>Description</h4><p>Specifies
extra environment variables for the external application.</p>
<h4>Syntax</h4><p>Key=value. Multiple variables can be
separated by "ENTER"</p> </article> </div>
<div class="helpitem"><article
class="ls-helpitem"><div><header
id="initTimeout"><h3>Initial Request Timeout
(secs)<span class="ls-permlink"><a
href="#initTimeout"></a></span><span
class="top"><a
href="#top">&#8657;</a></span></h3></header></div><h4>Description</h4><p>Specifies
the maximum time in seconds the server will wait for the external
application to respond to the first request over a new established
connection. If the server does not receive any data from the external
application within this timeout limit, it will mark this connection as bad.
This helps to identify communication problems with external applications as
quickly as possible. If some requests take longer to process, increase this
limit to avoid 503 error messages.</p>
<h4>Syntax</h4><p>Integer number</p>
</article> </div>
<div class="helpitem"><article
class="ls-helpitem"><div><header
id="retryTimeout"><h3>Retry Timeout (secs)<span
class="ls-permlink"><a
href="#retryTimeout"></a></span><span
class="top"><a
href="#top">&#8657;</a></span></h3></header></div><h4>Description</h4><p>Specifies
the period of time that the server waits before retrying an external
application that had a prior communication problem.</p>
<h4>Syntax</h4><p>Integer number</p>
</article> </div>
<div class="helpitem"><article
class="ls-helpitem"><div><header
id="respBuffer"><h3>Response Buffering<span
class="ls-permlink"><a
href="#respBuffer"></a></span><span
class="top"><a
href="#top">&#8657;</a></span></h3></header></div><h4>Description</h4><p>Specifies
whether to buffer responses received from external applications. If a
"nph-" (Non-Parsed-Header) script is detected, buffering is
turned off for responses with full HTTP headers.</p>
<h4>Syntax</h4><p>Select from drop down list</p>
</article> </div>
</section>
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