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Posted to cvs@httpd.apache.org by gr...@apache.org on 2012/07/18 15:16:25 UTC
svn commit: r1362933 - in /httpd/httpd/branches/2.4.x/docs/manual/rewrite:
flags.html.en flags.xml
Author: gryzor
Date: Wed Jul 18 13:16:24 2012
New Revision: 1362933
URL: http://svn.apache.org/viewvc?rev=1362933&view=rev
Log:
Adding a note about proxy performance being bad when using rewrite's [P].
Advise the use of ProxyPass* instead
Modified:
httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.html.en
httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.xml
Modified: httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.html.en
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.html.en?rev=1362933&r1=1362932&r2=1362933&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.html.en (original)
+++ httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.html.en Wed Jul 18 13:16:24 2012
@@ -274,7 +274,7 @@ CustomLog logs/access_log combined env=!
an example, not as a recommendation.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
-<h2><a name="flag_end" id="flag_end">END</a></h2>
+<h2><a name="flag_end" id="flag_end">END</a></h2>
<p>Using the [END] flag terminates not only the current round of rewrite
processing (like [L]) but also prevents any subsequent rewrite
processing from occurring in per-directory (htaccess) context.</p>
@@ -505,6 +505,15 @@ and hostname part of the URL is either f
client undue influence.</p>
</div>
+<div class="warning">
+<h3>Performance warning</h3>
+<p>Using this flag triggers the use of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>, without handling of persistent connections. This
+means the performance of your proxy will be better if you set it up with <code class="directive">ProxyPass</code> or
+<code class="directive">ProxyPassMatch</code></p>
+<p>This is because this flag triggers the use of the default worker, which does not handle connection pooling.</p>
+<p>Avoid using this flag and prefer those directives, whenever you can.</p>
+</div>
+
<p>Note: <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> must be enabled in order
to use this flag.</p>
@@ -609,7 +618,7 @@ will be used to generate the URL sent wi
<em>Any</em> valid HTTP response status code may be specified,
using the syntax [R=305], with a 302 status code being used by
default if none is specified. The status code specified need not
-necessarily be a redirect (3xx) status code. However,
+necessarily be a redirect (3xx) status code. However,
if a status code is outside the redirect range (300-399) then the
substitution string is dropped entirely, and rewriting is stopped as if
the <code>L</code> were used.</p>
@@ -629,11 +638,11 @@ URI in request' warnings.
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="flag_s" id="flag_s">S|skip</a></h2>
-<p>The [S] flag is used to skip rules that you don't want to run. The
-syntax of the skip flag is [S=<em>N</em>], where <em>N</em> signifies
-the number of rules to skip. This can be thought of as a <code>goto</code>
-statement in your rewrite ruleset. In the following example, we only want
-to run the <code class="directive"><a href="../mod/mod_rewrite.html#rewriterule">RewriteRule</a></code> if the
+<p>The [S] flag is used to skip rules that you don't want to run. The
+syntax of the skip flag is [S=<em>N</em>], where <em>N</em> signifies
+the number of rules to skip. This can be thought of as a <code>goto</code>
+statement in your rewrite ruleset. In the following example, we only want
+to run the <code class="directive"><a href="../mod/mod_rewrite.html#rewriterule">RewriteRule</a></code> if the
requested URI doesn't correspond with an actual file.</p>
<pre class="prettyprint lang-config">
Modified: httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.xml
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.xml?rev=1362933&r1=1362932&r2=1362933&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.xml (original)
+++ httpd/httpd/branches/2.4.x/docs/manual/rewrite/flags.xml Wed Jul 18 13:16:24 2012
@@ -261,7 +261,7 @@ module="mod_setenvif">SetEnvIf</directiv
an example, not as a recommendation.</p>
</section>
-<section id="flag_end"><title>END</title>
+<section id="flag_end"><title>END</title>
<p>Using the [END] flag terminates not only the current round of rewrite
processing (like [L]) but also prevents any subsequent rewrite
processing from occurring in per-directory (htaccess) context.</p>
@@ -489,6 +489,15 @@ and hostname part of the URL is either f
client undue influence.</p>
</note>
+<note type="warning">
+<title>Performance warning</title>
+<p>Using this flag triggers the use of <module>mod_proxy</module>, without handling of persistent connections. This
+means the performance of your proxy will be better if you set it up with <directive>ProxyPass</directive> or
+<directive>ProxyPassMatch</directive></p>
+<p>This is because this flag triggers the use of the default worker, which does not handle connection pooling.</p>
+<p>Avoid using this flag and prefer those directives, whenever you can.</p>
+</note>
+
<p>Note: <module>mod_proxy</module> must be enabled in order
to use this flag.</p>
@@ -597,7 +606,7 @@ will be used to generate the URL sent wi
<em>Any</em> valid HTTP response status code may be specified,
using the syntax [R=305], with a 302 status code being used by
default if none is specified. The status code specified need not
-necessarily be a redirect (3xx) status code. However,
+necessarily be a redirect (3xx) status code. However,
if a status code is outside the redirect range (300-399) then the
substitution string is dropped entirely, and rewriting is stopped as if
the <code>L</code> were used.</p>
@@ -617,11 +626,11 @@ URI in request' warnings.
</section>
<section id="flag_s"><title>S|skip</title>
-<p>The [S] flag is used to skip rules that you don't want to run. The
-syntax of the skip flag is [S=<em>N</em>], where <em>N</em> signifies
-the number of rules to skip. This can be thought of as a <code>goto</code>
-statement in your rewrite ruleset. In the following example, we only want
-to run the <directive module="mod_rewrite">RewriteRule</directive> if the
+<p>The [S] flag is used to skip rules that you don't want to run. The
+syntax of the skip flag is [S=<em>N</em>], where <em>N</em> signifies
+the number of rules to skip. This can be thought of as a <code>goto</code>
+statement in your rewrite ruleset. In the following example, we only want
+to run the <directive module="mod_rewrite">RewriteRule</directive> if the
requested URI doesn't correspond with an actual file.</p>
<highlight language="config">