<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
+<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" />
+<!--
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
This file is generated from xml source: DO NOT EDIT
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-->
-<title>mod_deflate - Apache HTTP Server</title>
+<title>mod_deflate - Apache HTTP Server Version 2.5</title>
<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
-<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" />
+<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" />
+<script src="../style/scripts/prettify.min.js" type="text/javascript">
+</script>
+
<link href="../images/favicon.ico" rel="shortcut icon" /></head>
<body>
<div id="page-header">
-<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/
directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
-<p class="apache">Apache HTTP Server Version 2.3</p>
-<img alt="" src="../images/feather.gif" /></div>
+<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/
quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
+<p class="apache">Apache HTTP Server Version 2.5</p>
+<img alt="" src="../images/feather.png" /></div>
<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
<div id="path">
-<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.
3</a> > <a href="./">Modules</a></div>
+<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.
5</a> > <a href="./">Modules</a></div>
<div id="page-content">
<div id="preamble"><h1>Apache Module mod_deflate</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_deflate.html" title="English"> en </a> |
<a href="../fr/mod/mod_deflate.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
<a href="../ja/mod/mod_deflate.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
-<a href="../ko/mod/mod_deflate.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
-<a href="../zh-cn/mod/mod_deflate.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese"> zh-cn </a></p>
+<a href="../ko/mod/mod_deflate.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Compress content before it is delivered to the
client</td></tr>
your server to be compressed before being sent to the client over
the network.</p>
</div>
-<div id="quickview"><h3 class="directives">Directives</h3>
+<div id="quickview"><h3>Topics</h3>
+<ul id="topics">
+<li><img alt="" src="../images/down.gif" /> <a href="#supportedencodings">Supported Encodings</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#recommended">Sample Configurations</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#enable">Enabling Compression</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#proxies">Dealing with proxy servers</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#precompressed">Serving pre-compressed
+content</a></li>
+</ul><h3 class="directives">Directives</h3>
<ul id="toc">
+<li><img alt="" src="../images/down.gif" /> <a href="#deflatealteretag">DeflateAlterETag</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#deflatebuffersize">DeflateBufferSize</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#deflatecompressionlevel">DeflateCompressionLevel</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#deflatefilternote">DeflateFilterNote</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#deflateinflatelimitrequestbody">DeflateInflateLimitRequestBody</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#deflateinflateratioburst">DeflateInflateRatioBurst</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#deflateinflateratiolimit">DeflateInflateRatioLimit</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#deflatememlevel">DeflateMemLevel</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#deflatewindowsize">DeflateWindowSize</a></li>
</ul>
-<h3>Topics</h3>
-<ul id="topics">
-<li><img alt="" src="../images/down.gif" /> <a href="#recommended">Sample Configurations</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#enable">Enabling Compression</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#proxies">Dealing with proxy servers</a></li>
-</ul><h3>See also</h3>
+<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_deflate">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_deflate">Report a bug</a></li></ul><h3>See also</h3>
<ul class="seealso">
<li><a href="../filter.html">Filters</a></li>
-</ul></div>
+<li><a href="#comments_section">Comments</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
-<h2><a name="recommended" id="recommended">Sample Configurations</a></h2>
- <p>This is a simple sample configuration for the impatient.</p>
-
- <div class="example"><h3>Compress only a few types</h3><p><code>
- AddOutputFilterByType DEFLATE text/html text/plain text/xml
- </code></p></div>
-
- <p>The following configuration, while resulting in more compressed content,
- is also much more complicated. Do not use this unless you fully understand
- all the configuration details.</p>
-
- <div class="example"><h3>Compress everything except images</h3><p><code>
- <Location /><br />
- <span class="indent">
- # Insert filter<br />
- SetOutputFilter DEFLATE<br />
- <br />
- # Netscape 4.x has some problems...<br />
- BrowserMatch ^Mozilla/4 gzip-only-text/html<br />
- <br />
- # Netscape 4.06-4.08 have some more problems<br />
- BrowserMatch ^Mozilla/4\.0[678] no-gzip<br />
- <br />
- # MSIE masquerades as Netscape, but it is fine<br />
- BrowserMatch \bMSIE !no-gzip !gzip-only-text/html<br />
- # Don't compress images<br />
- SetEnvIfNoCase Request_URI \<br />
- <span class="indent">
- \.(?:gif|jpe?g|png)$ no-gzip dont-vary<br />
- </span>
- <br />
- # Make sure proxies don't deliver the wrong content<br />
- Header append Vary User-Agent env=!dont-vary<br />
- </span>
- </Location>
- </code></p></div>
+<h2><a name="supportedencodings" id="supportedencodings">Supported Encodings</a><a title="Permanent link" href="#supportedencodings" class="permalink">¶</a></h2>
+ <p>The <code>gzip</code> encoding is the only one supported to ensure complete compatibility
+ with old browser implementations. The <code>deflate</code> encoding is not supported,
+ please check the <a href="http://www.gzip.org/zlib/zlib_faq.html#faq38">zlib's documentation</a>
+ for a complete explanation.
+ </p>
+</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="recommended" id="recommended">Sample Configurations</a><a title="Permanent link" href="#recommended" class="permalink">¶</a></h2>
+ <div class="warning"><h3>Compression and TLS</h3>
+ <p>Some web applications are vulnerable to an information disclosure
+ attack when a TLS connection carries deflate compressed data. For more
+ information, review the details of the "BREACH" family of attacks.</p>
+ </div>
+ <p>This is a simple configuration that compresses common text-based content types.</p>
+
+ <div class="example"><h3>Compress only a few types</h3><pre class="prettyprint lang-config">AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/javascript</pre>
+</div>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
-<h2><a name="enable" id="enable">Enabling Compression</a></h2>
+<h2><a name="enable" id="enable">Enabling Compression</a><a title="Permanent link" href="#enable" class="permalink">¶</a></h2>
+ <div class="warning"><h3>Compression and TLS</h3>
+ <p>Some web applications are vulnerable to an information disclosure
+ attack when a TLS connection carries deflate compressed data. For more
+ information, review the details of the "BREACH" family of attacks.</p>
+ </div>
<h3><a name="output" id="output">Output Compression</a></h3>
<p>Compression is implemented by the <code>DEFLATE</code>
will enable compression for documents in the container where it
is placed:</p>
- <div class="example"><p><code>
- SetOutputFilter DEFLATE
- </code></p></div>
+ <pre class="prettyprint lang-config">SetOutputFilter DEFLATE
+SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip</pre>
- <p>Some popular browsers cannot handle compression of all content
- so you may want to set the <code>gzip-only-text/html</code> note to
- <code>1</code> to only allow html files to be compressed (see
- below). If you set this to <em>anything but <code>1</code></em> it
- will be ignored.</p>
<p>If you want to restrict the compression to particular MIME types
in general, you may use the <code class="directive"><a href="../mod/mod_filter.html#addoutputfilterbytype">AddOutputFilterByType</a></code> directive. Here is an example of
enabling compression only for the html files of the Apache
documentation:</p>
- <div class="example"><p><code>
- <Directory "/your-server-root/manual"><br />
- <span class="indent">
- AddOutputFilterByType DEFLATE text/html<br />
- </span>
- </Directory>
- </code></p></div>
-
- <p>For browsers that have problems even with compression of all file
- types, use the <code class="directive"><a href="../mod/mod_setenvif.html#browsermatch">BrowserMatch</a></code> directive to set the <code>no-gzip</code>
- note for that particular browser so that no compression will be
- performed. You may combine <code>no-gzip</code> with <code>gzip-only-text/html</code> to get the best results. In that case
- the former overrides the latter. Take a look at the following
- excerpt from the <a href="#recommended">configuration example</a>
- defined in the section above:</p>
-
- <div class="example"><p><code>
- BrowserMatch ^Mozilla/4 gzip-only-text/html<br />
- BrowserMatch ^Mozilla/4\.0[678] no-gzip<br />
- BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
- </code></p></div>
-
- <p>At first we probe for a <code>User-Agent</code> string that
- indicates a Netscape Navigator version of 4.x. These versions
- cannot handle compression of types other than
- <code>text/html</code>. The versions 4.06, 4.07 and 4.08 also
- have problems with decompressing html files. Thus, we completely
- turn off the deflate filter for them.</p>
-
- <p>The third <code class="directive"><a href="../mod/mod_setenvif.html#browsermatch">BrowserMatch</a></code>
- directive fixes the guessed identity of the user agent, because
- the Microsoft Internet Explorer identifies itself also as "Mozilla/4"
- but is actually able to handle requested compression. Therefore we
- match against the additional string "MSIE" (<code>\b</code> means
- "word boundary") in the <code>User-Agent</code> Header and turn off
- the restrictions defined before.</p>
+ <pre class="prettyprint lang-config"><Directory "/your-server-root/manual">
+ AddOutputFilterByType DEFLATE text/html
+</Directory></pre>
+
<div class="note"><h3>Note</h3>
The <code>DEFLATE</code> filter is always inserted after RESOURCE
filters like PHP or SSI. It never touches internal subrequests.
</div>
<div class="note"><h3>Note</h3>
- There is a environment variable <code>force-gzip</code>,
- set via <code class="directive"><a href="../mod/core.html#setenv">SetEnv</a></code>, which
+ There is an environment variable <code>force-gzip</code>,
+ set via <code class="directive"><a href="../mod/mod_env.html#setenv">SetEnv</a></code>, which
will ignore the accept-encoding setting of your browser and will
send compressed output.
</div>
<p>The <code class="module"><a href="../mod/mod_deflate.html">mod_deflate</a></code> module also provides a filter for
inflating/uncompressing a gzip compressed response body. In order to activate
this feature you have to insert the <code>INFLATE</code> filter into
- the outputfilter chain using <code class="directive"><a href="../mod/core.html#setoutputfilter">SetOutputFilter</a></code> or <code class="directive"><a href="../mod/mod_mime.html#addoutputfilter">AddOutputFilter</a></code>, for example:</p>
+ the output filter chain using <code class="directive"><a href="../mod/core.html#setoutputfilter">SetOutputFilter</a></code> or <code class="directive"><a href="../mod/mod_mime.html#addoutputfilter">AddOutputFilter</a></code>, for example:</p>
+
+ <pre class="prettyprint lang-config"><Location "/dav-area">
+ ProxyPass "http://example.com/"
+ SetOutputFilter INFLATE
+</Location></pre>
- <div class="example"><p><code>
- <Location /dav-area><br />
- <span class="indent">
- ProxyPass http://example.com/<br />
- SetOutputFilter INFLATE<br />
- </span>
- </Location>
- </code></p></div>
<p>This Example will uncompress gzip'ed output from example.com, so other
filters can do further processing with it.
this feature you have to insert the <code>DEFLATE</code> filter into
the input filter chain using <code class="directive"><a href="../mod/core.html#setinputfilter">SetInputFilter</a></code> or <code class="directive"><a href="../mod/mod_mime.html#addinputfilter">AddInputFilter</a></code>, for example:</p>
- <div class="example"><p><code>
- <Location /dav-area><br />
- <span class="indent">
- SetInputFilter DEFLATE<br />
- </span>
- </Location>
- </code></p></div>
+ <pre class="prettyprint lang-config"><Location "/dav-area">
+ SetInputFilter DEFLATE
+</Location></pre>
+
<p>Now if a request contains a <code>Content-Encoding:
gzip</code> header, the body will be automatically decompressed.
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
-<h2><a name="proxies" id="proxies">Dealing with proxy servers</a></h2>
+<h2><a name="proxies" id="proxies">Dealing with proxy servers</a><a title="Permanent link" href="#proxies" class="permalink">¶</a></h2>
<p>The <code class="module"><a href="../mod/mod_deflate.html">mod_deflate</a></code> module sends a <code>Vary:
Accept-Encoding</code> HTTP response header to alert proxies that
in a typical configuration where the addition of the <code>DEFLATE</code>
filter depends on the <code>User-Agent</code>, you should add:</p>
- <div class="example"><p><code>
- Header append Vary User-Agent
- </code></p></div>
+ <pre class="prettyprint lang-config">Header append Vary User-Agent</pre>
+
<p>If your decision about compression depends on other information
than request headers (<em>e.g.</em> HTTP version), you have to set the
<code>Vary</code> header to the value <code>*</code>. This prevents
compliant proxies from caching entirely.</p>
- <div class="example"><h3>Example</h3><p><code>
- Header set Vary *
- </code></p></div>
+ <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">Header set Vary *</pre>
+</div>
+</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="precompressed" id="precompressed">Serving pre-compressed
+content</a><a title="Permanent link" href="#precompressed" class="permalink">¶</a></h2>
+
+ <p>Since <code class="module"><a href="../mod/mod_deflate.html">mod_deflate</a></code> re-compresses content each
+ time a request is made, some performance benefit can be derived by
+ pre-compressing the content and telling mod_deflate to serve them
+ without re-compressing them. This may be accomplished using a
+ configuration like the following:</p>
+
+ <pre class="prettyprint lang-config"><IfModule mod_headers.c>
+ # Serve gzip compressed CSS and JS files if they exist
+ # and the client accepts gzip.
+ RewriteCond "%{HTTP:Accept-encoding}" "gzip"
+ RewriteCond "%{REQUEST_FILENAME}\.gz" "-s"
+ RewriteRule "^(.*)\.(css|js)" "$1\.$2\.gz" [QSA]
+
+ # Serve correct content types, and prevent mod_deflate double gzip.
+ RewriteRule "\.css\.gz$" "-" [T=text/css,E=no-gzip:1]
+ RewriteRule "\.js\.gz$" "-" [T=text/javascript,E=no-gzip:1]
+
+
+ <FilesMatch "(\.js\.gz|\.css\.gz)$">
+ # Serve correct encoding type.
+ Header append Content-Encoding gzip
+
+ # Force proxies to cache gzipped &
+ # non-gzipped css/js files separately.
+ Header append Vary Accept-Encoding
+ </FilesMatch>
+</IfModule></pre>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="DeflateAlterETag" id="DeflateAlterETag">DeflateAlterETag</a> <a name="deflatealteretag" id="deflatealteretag">Directive</a><a title="Permanent link" href="#deflatealteretag" class="permalink">¶</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>How the outgoing ETag header should be modified during compression</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DeflateAlterETag AddSuffix|NoChange|Remove</code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>DeflateAlterETag AddSuffix</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_deflate</td></tr>
+</table>
+ <p>The <code class="directive">DeflateAlterETag</code> directive specifies
+ how the ETag hader should be altered when a response is compressed.</p>
+ <dl>
+ <dt>AddSuffix</dt>
+ <dd><p>Append the compression method onto the end of the ETag, causing
+ compressed and uncompressed representations to have unique ETags.
+ This has been the default since 2.4.0, but prevents serving
+ "HTTP Not Modified" (304) responses to conditional requests for
+ compressed content.</p></dd>
+ <dt>NoChange</dt>
+ <dd><p>Don't change the ETag on a compressed response. This was the default
+ prior to 2.4.0, but does not satisfy the HTTP/1.1 property that all
+ representations of the same resource have unique ETags. </p></dd>
+ <dt>Remove</dt>
+ <dd><p>Remove the ETag header from compressed responses. This prevents
+ some conditional requests from being possible, but avoids the
+ shortcomings of the preceding options. </p></dd>
+ </dl>
+
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
-<div class="directive-section"><h2><a name="DeflateBufferSize" id="DeflateBufferSize">DeflateBufferSize</a> <a name="deflatebuffersize" id="deflatebuffersize">Directive</a></h2>
+<div class="directive-section"><h2><a name="DeflateBufferSize" id="DeflateBufferSize">DeflateBufferSize</a> <a name="deflatebuffersize" id="deflatebuffersize">Directive</a><a title="Permanent link" href="#deflatebuffersize" class="permalink">¶</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Fragment size to be compressed at one time by zlib</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DeflateBufferSize <var>value</var></code></td></tr>
</table>
<p>The <code class="directive">DeflateBufferSize</code> directive specifies
the size in bytes of the fragments that zlib should compress at one
- time.</p>
+ time. If the compressed response size is bigger than the one specified
+ by this directive then httpd will switch to chunked encoding
+ (HTTP header <code>Transfer-Encoding</code> set to <code>Chunked</code>), with the
+ side effect of not setting any <code>Content-Length</code> HTTP header. This is particularly
+ important when httpd works behind reverse caching proxies or when httpd is configured with
+ <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> and <code class="module"><a href="../mod/mod_cache_disk.html">mod_cache_disk</a></code> because
+ HTTP responses without any <code>Content-Length</code> header might not be cached.
+ </p>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
-<div class="directive-section"><h2><a name="DeflateCompressionLevel" id="DeflateCompressionLevel">DeflateCompressionLevel</a> <a name="deflatecompressionlevel" id="deflatecompressionlevel">Directive</a></h2>
+<div class="directive-section"><h2><a name="DeflateCompressionLevel" id="DeflateCompressionLevel">DeflateCompressionLevel</a> <a name="deflatecompressionlevel" id="deflatecompressionlevel">Directive</a><a title="Permanent link" href="#deflatecompressionlevel" class="permalink">¶</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>How much compression do we apply to the output</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DeflateCompressionLevel <var>value</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_deflate</td></tr>
-<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>This directive is available since Apache 2.0.45</td></tr>
</table>
<p>The <code class="directive">DeflateCompressionLevel</code> directive specifies
what level of compression should be used, the higher the value,
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
-<div class="directive-section"><h2><a name="DeflateFilterNote" id="DeflateFilterNote">DeflateFilterNote</a> <a name="deflatefilternote" id="deflatefilternote">Directive</a></h2>
+<div class="directive-section"><h2><a name="DeflateFilterNote" id="DeflateFilterNote">DeflateFilterNote</a> <a name="deflatefilternote" id="deflatefilternote">Directive</a><a title="Permanent link" href="#deflatefilternote" class="permalink">¶</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Places the compression ratio in a note for logging</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DeflateFilterNote [<var>type</var>] <var>notename</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_deflate</td></tr>
-<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td><var>type</var> is available since Apache 2.0.45</td></tr>
</table>
<p>The <code class="directive">DeflateFilterNote</code> directive
specifies that a note about compression ratios should be attached
the directive. You can use that note for statistical purposes by
adding the value to your <a href="../logs.html#accesslog">access log</a>.</p>
- <div class="example"><h3>Example</h3><p><code>
- DeflateFilterNote ratio<br />
- <br />
- LogFormat '"%r" %b (%{ratio}n) "%{User-agent}i"' deflate<br />
- CustomLog logs/deflate_log deflate
- </code></p></div>
+ <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"> DeflateFilterNote ratio
+
+ LogFormat '"%r" %b (%{ratio}n) "%{User-agent}i"' deflate
+ CustomLog "logs/deflate_log" deflate</pre>
+</div>
<p>If you want to extract more accurate values from your logs, you
can use the <var>type</var> argument to specify the type of data
- left as note for logging. <var>type</var> can be one of:</p>
+ left as a note for logging. <var>type</var> can be one of:</p>
<dl>
<dt><code>Input</code></dt>
<p>Thus you may log it this way:</p>
- <div class="example"><h3>Accurate Logging</h3><p><code>
- DeflateFilterNote Input instream<br />
- DeflateFilterNote Output outstream<br />
- DeflateFilterNote Ratio ratio<br />
- <br />
- LogFormat '"%r" %{outstream}n/%{instream}n (%{ratio}n%%)' deflate<br />
- CustomLog logs/deflate_log deflate
- </code></p></div>
+ <div class="example"><h3>Accurate Logging</h3><pre class="prettyprint lang-config">DeflateFilterNote Input instream
+DeflateFilterNote Output outstream
+DeflateFilterNote Ratio ratio
+
+LogFormat '"%r" %{outstream}n/%{instream}n (%{ratio}n%%)' deflate
+CustomLog "logs/deflate_log" deflate</pre>
+</div>
<h3>See also</h3>
<ul>
</ul>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
-<div class="directive-section"><h2><a name="DeflateMemLevel" id="DeflateMemLevel">DeflateMemLevel</a> <a name="deflatememlevel" id="deflatememlevel">Directive</a></h2>
+<div class="directive-section"><h2><a name="DeflateInflateLimitRequestBody" id="DeflateInflateLimitRequestBody">DeflateInflateLimitRequestBody</a> <a name="deflateinflatelimitrequestbody" id="deflateinflatelimitrequestbody">Directive</a><a title="Permanent link" href="#deflateinflatelimitrequestbody" class="permalink">¶</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maximum size of inflated request bodies</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DeflateInflateLimitRequestBody<var>value</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>None, but LimitRequestBody applies after deflation</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_deflate</td></tr>
+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.4.10 and later</td></tr>
+</table>
+ <p>The <code class="directive">DeflateInflateLimitRequestBody</code> directive
+ specifies the maximum size of an inflated request body. If it is unset,
+ <code class="directive"><a href="../mod/core.html#limitrequestbody">LimitRequestBody</a></code> is applied to the
+ inflated body.</p>
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="DeflateInflateRatioBurst" id="DeflateInflateRatioBurst">DeflateInflateRatioBurst</a> <a name="deflateinflateratioburst" id="deflateinflateratioburst">Directive</a><a title="Permanent link" href="#deflateinflateratioburst" class="permalink">¶</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maximum number of times the inflation ratio for request bodies
+ can be crossed</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DeflateInflateRatioBurst <var>value</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>3</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_deflate</td></tr>
+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.4.10 and later</td></tr>
+</table>
+ <p>The <code class="directive">DeflateInflateRatioBurst</code> directive
+ specifies the maximum number of times the
+ <code class="directive">DeflateInflateRatioLimit</code> can be crossed before
+ terminating the request.</p>
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="DeflateInflateRatioLimit" id="DeflateInflateRatioLimit">DeflateInflateRatioLimit</a> <a name="deflateinflateratiolimit" id="deflateinflateratiolimit">Directive</a><a title="Permanent link" href="#deflateinflateratiolimit" class="permalink">¶</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maximum inflation ratio for request bodies</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DeflateInflateRatioLimit <var>value</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>200</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_deflate</td></tr>
+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.4.10 and later</td></tr>
+</table>
+ <p>The <code class="directive">DeflateInflateRatioLimit</code> directive
+ specifies the maximum ratio of deflated to inflated size of an
+ inflated request body. This ratio is checked as the body is
+ streamed in, and if crossed more than
+ <code class="directive">DeflateInflateRatioBurst</code> times, the request
+ will be terminated.</p>
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="DeflateMemLevel" id="DeflateMemLevel">DeflateMemLevel</a> <a name="deflatememlevel" id="deflatememlevel">Directive</a><a title="Permanent link" href="#deflatememlevel" class="permalink">¶</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>How much memory should be used by zlib for compression</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DeflateMemLevel <var>value</var></code></td></tr>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
-<div class="directive-section"><h2><a name="DeflateWindowSize" id="DeflateWindowSize">DeflateWindowSize</a> <a name="deflatewindowsize" id="deflatewindowsize">Directive</a></h2>
+<div class="directive-section"><h2><a name="DeflateWindowSize" id="DeflateWindowSize">DeflateWindowSize</a> <a name="deflatewindowsize" id="deflatewindowsize">Directive</a><a title="Permanent link" href="#deflatewindowsize" class="permalink">¶</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Zlib compression window size</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DeflateWindowSize <var>value</var></code></td></tr>
<p><span>Available Languages: </span><a href="../en/mod/mod_deflate.html" title="English"> en </a> |
<a href="../fr/mod/mod_deflate.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
<a href="../ja/mod/mod_deflate.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
-<a href="../ko/mod/mod_deflate.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
-<a href="../zh-cn/mod/mod_deflate.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese"> zh-cn </a></p>
-</div><div id="footer">
-<p class="apache">Copyright 2011 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
-<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div>
+<a href="../ko/mod/mod_deflate.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
+</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
+<script type="text/javascript"><!--//--><![CDATA[//><!--
+var comments_shortname = 'httpd';
+var comments_identifier = 'http://httpd.apache.org/docs/trunk/mod/mod_deflate.html';
+(function(w, d) {
+ if (w.location.hostname.toLowerCase() == "httpd.apache.org") {
+ d.write('<div id="comments_thread"><\/div>');
+ var s = d.createElement('script');
+ s.type = 'text/javascript';
+ s.async = true;
+ s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
+ (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
+ }
+ else {
+ d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>');
+ }
+})(window, document);
+//--><!]]></script></div><div id="footer">
+<p class="apache">Copyright 2018 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
+<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!--
+if (typeof(prettyPrint) !== 'undefined') {
+ prettyPrint();
+}
+//--><!]]></script>
</body></html>
\ No newline at end of file
projects / apache / blobdiff