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| Version: 9.3.28.v20191105</span></td><td style="width: 50%"></td></tr></table><div xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Configuring Jetty Request Logs</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="default-logging-with-stderrlog.html"><i class="fa fa-chevron-left" aria-hidden="true"></i> Previous</a> </td><th width="60%" align="center">Chapter 11. Jetty Logging<br><a accesskey="p" href="index.html"><i class="fa fa-home" aria-hidden="true"></i> Home</a></th><td width="20%" align="right"> <a accesskey="n" href="example-logging-log4j.html">Next <i class="fa fa-chevron-right" aria-hidden="true"></i></a></td></tr></table><hr></div><div xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" class="jetty-callout"><h5 class="callout"><a href="http://www.webtide.com/">Contact the core Jetty developers at |
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| </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="configuring-jetty-request-logs"></a>Configuring Jetty Request Logs</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="configuring-jetty-request-logs.html#constructing-request-log-entry">Constructing a Request Log Entry</a></span></dt><dt><span class="section"><a href="configuring-jetty-request-logs.html#implementing-request-log">Implementing a Request Log</a></span></dt><dt><span class="section"><a href="configuring-jetty-request-logs.html#configuring-request-log">Configuring the Request Log module</a></span></dt><dt><span class="section"><a href="configuring-jetty-request-logs.html#configuring-separate-request-log-for-web-application">Configuring a Separate Request Log For a Web Application</a></span></dt></dl></div><p>Request logs are a record of the requests that the server has processed. |
| There is one entry per request received, and commonly in the standard NCSA format, so you can use tools like <a class="link" href="http://en.wikipedia.org/wiki/Webalizer" target="_top">Webalizer</a> to analyze them conveniently.</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="constructing-request-log-entry"></a>Constructing a Request Log Entry</h3></div></div></div><p>A standard request log entry includes the client IP address, date, method, URL, result, size, referrer, user agent and latency. |
| For example:</p><pre class="literallayout">123.4.5.6 - - [20/Jul/2016:10:16:17 +0000] |
| "GET /jetty/tut/XmlConfiguration.html HTTP/1.1" |
| 200 76793 "http://localhost:8080/jetty/tut/logging.html" |
| "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040614 Firefox/0.8" 342</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="implementing-request-log"></a>Implementing a Request Log</h3></div></div></div><p>Jetty provides an implementation called <code class="literal">NCSARequestLog</code> which supports the NCSA format in files that will roll over on a daily basis.</p><p>The <a class="link" href="http://logback.qos.ch/" target="_top">Logback Project</a> offers <a class="link" href="http://logback.qos.ch/access.html" target="_top">another implementation</a> of a <code class="literal">RequestLog</code> interface, providing rich and powerful HTTP-access log functionality.</p><p>If neither of these options meets your needs, you can implement a custom request logger by implementing Jetty’s <a class="link" href="http://www.eclipse.org/jetty/javadoc/9.3.28.v20191105/org/eclipse/jetty/server/RequestLog.html" target="_top"><code class="literal">RequestLog.java</code></a> interface and plugging it in similar to the <code class="literal">NCSARequestLog</code>, as shown below.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="configuring-request-log"></a>Configuring the Request Log module</h3></div></div></div><p>To enable the Request Log module for the entire server via the Jetty distribution, it first needs to be enabled on the command line:</p><div class="screenexample"><pre class="screen">$ java -jar ../start.jar --add-to-startd=requestlog |
| |
| INFO: requestlog initialised in ${jetty.base}/start.d/requestlog.ini |
| MKDIR: ${jetty.base}/logs |
| INFO: Base directory was modified</pre></div><p>The above command will add a new <code class="literal">requestlog.ini</code> file to your <code class="literal">{$jetty.base}/start.d</code> directory. |
| If you used <code class="literal">--add-to-start</code> it will append the configuration options for the module to the <code class="literal">start.ini</code> file located in your <code class="literal">{$jetty.base}</code> directory.</p><p>The equivalent code for embedded usages of Jetty is:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>NCSARequestLog requestLog = new NCSARequestLog("/var/logs/jetty/jetty-yyyy_mm_dd.request.log"); |
| requestLog.setAppend(true); |
| requestLog.setExtended(false); |
| requestLog.setLogTimeZone("GMT"); |
| requestLog.setLogLatency(true); |
| requestLog.setRetainDays("90"); |
| |
| server.setRequestLog(requestLog);</code></pre><p>This configures a request log in <code class="literal">{$jetty.home}/logs</code> with filenames including the date. |
| Existing log files are appended to and the extended NCSA format is used in the GMT time zone.</p><p>The above configuration enables Log Latency, which is the amount of time it took the server to handle the request. |
| This value is measured in milliseconds and is appended to the the log file for each request.</p><p>You can also customize the number of days you wish to keep request logs. |
| By default, log files are kept for 90 days before being deleted. |
| The value for <code class="literal">retainDays</code> (xml) or <code class="literal">setRetainDays</code> (Java) should be configured as <span class="emphasis"><em>1 + n</em></span> days. |
| For example, if you wanted to keep the logs for the current day and the day prior you would set the <code class="literal">retainDays</code> (or <code class="literal">setRetainDays</code>) value to 2.</p><p>To examine more configuration options, see <a class="link" href="http://www.eclipse.org/jetty/javadoc/9.3.28.v20191105/org/eclipse/jetty/server/NCSARequestLog.html" target="_top">NCSARequestLog.java</a>.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="configuring-separate-request-log-for-web-application"></a>Configuring a Separate Request Log For a Web Application</h3></div></div></div><p>To configure a separate request log for specific a web application, add the following to the context XML file.</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code><Configure class="org.eclipse.jetty.webapp.WebAppContext"> |
| ... |
| <Call name="insertHandler"> |
| <Arg> |
| <New id="RequestLog" class="org.eclipse.jetty.server.handler.RequestLogHandler"> |
| <Set name="requestLog"> |
| <New id="RequestLogImpl" class="org.eclipse.jetty.server.NCSARequestLog"> |
| <Set name="filename"><Property name="jetty.logs" default="./logs"/>/test-yyyy_mm_dd.request.log</Set> |
| <Set name="filenameDateFormat">yyyy_MM_dd</Set> |
| <Set name="LogTimeZone">GMT</Set> |
| <Set name="retainDays">90</Set> |
| <Set name="append">true</Set> |
| <Set name="LogLatency">true</Set> |
| </New> |
| </Set> |
| </New> |
| </Arg> |
| </Call> |
| ... |
| </Configure></code></pre></div></div><script type="text/javascript"> |
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