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directives.html
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<!DOCTYPE html>
<html>
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<h6 id="project_tagline">Nginx module for embedding Clojure / Java / Groovy programs, typically those Ring based handlers</h6>
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<h1>
<a id="user-content-directives-reference" class="anchor" href="#directives-reference" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>Directives Reference</h1>
<ul>
<li><a href="#user-content-jvm_path">jvm_path</a></li>
<li><a href="#user-content-jvm_var">jvm_var</a></li>
<li><a href="#user-content-jvm_classpath">jvm_classpath</a></li>
<li><a href="#user-content-jvm_classpath_check">jvm_classpath_check</a></li>
<li><a href="#user-content-jvm_workers">jvm_workers</a></li>
<li><a href="#user-content-jvm_options">jvm_options</a></li>
<li><a href="#user-content-jvm_handler_type">jvm_handler_type</a></li>
<li><a href="#user-content-jvm_init_handler_name">jvm_init_handler_name</a></li>
<li><a href="#user-content-jvm_init_handler_code">jvm_init_handler_code</a></li>
<li><a href="#user-content-jvm_exit_handler_name">jvm_exit_handler_name</a></li>
<li><a href="#user-content-jvm_exit_handler_code">jvm_exit_handler_code</a></li>
<li><a href="#user-content-handlers_lazy_init">handlers_lazy_init</a></li>
<li><a href="#user-content-auto_upgrade_ws">auto_upgrade_ws</a></li>
<li><a href="#user-content-content_handler_type">content_handler_type</a></li>
<li><a href="#user-content-content_handler_name">content_handler_name</a></li>
<li><a href="#user-content-content_handler_code">content_handler_code</a></li>
<li><a href="#user-content-content_handler_property">content_handler_property</a></li>
<li><a href="#user-content-rewrite_handler_type">rewrite_handler_type</a></li>
<li><a href="#user-content-rewrite_handler_name">rewrite_handler_name</a></li>
<li><a href="#user-content-rewrite_handler_code">rewrite_handler_code</a></li>
<li><a href="#user-content-rewrite_handler_property">rewrite_handler_property</a></li>
<li><a href="#user-content-access_handler_type">access_handler_type</a></li>
<li><a href="#user-content-access_handler_name">access_handler_name</a></li>
<li><a href="#user-content-access_handler_code">access_handler_code</a></li>
<li><a href="#user-content-access_handler_property">access_handler_property</a></li>
<li><a href="#user-content-header_filter_type">header_filter_type</a></li>
<li><a href="#user-content-header_filter_name">header_filter_name</a></li>
<li><a href="#user-content-header_filter_code">header_filter_code</a></li>
<li><a href="#user-content-header_filter_property">header_filter_property</a></li>
<li><a href="#user-content-body_filter_type">body_filter_type</a></li>
<li><a href="#user-content-body_filter_name">body_filter_name</a></li>
<li><a href="#user-content-body_filter_code">body_filter_code</a></li>
<li><a href="#user-content-body_filter_property">body_filter_property</a></li>
<li><a href="#user-content-log_handler_type">log_handler_type</a></li>
<li><a href="#user-content-log_handler_name">log_handler_name</a></li>
<li><a href="#user-content-log_handler_code">log_handler_code</a></li>
<li><a href="#user-content-log_handler_property">log_handler_property</a></li>
<li><a href="#user-content-always_read_body">always_read_body</a></li>
<li><a href="#user-content-shared_map">shared_map</a></li>
<li><a href="#user-content-write_page_size">write_page_size</a></li>
</ul>
<h2>
<a id="user-content-jvm_path" class="anchor" href="#jvm_path" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_path</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_path</strong> auto | <em>path</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: http</li>
</ul>
<p>Defines jvm shared library path. When <code>auto</code> is used it will auto-detect jvm path otherwise it should be a real jvm shared library path. e.g.</p>
<ul>
<li>On Windows 32-bit it maybe is</li>
</ul>
<pre><code>C:/Program Files/Java/jdk1.7.0_25/jre/bin/server/jvm.dll
</code></pre>
<ul>
<li>On MacOSX it maybe is</li>
</ul>
<pre><code>/Library/Java/JavaVirtualMachines/1.6.0_65-b14-462.jdk/Contents/Libraries/libserver.dylib
or
/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/jre/lib/server/libjvm.dylib
</code></pre>
<ul>
<li>On Ubuntu, it maybe is</li>
</ul>
<pre><code>/usr/lib/jvm/java-7-oracle/jre/lib/amd64/server/libjvm.so`;
</code></pre>
<ul>
<li>On CentOS 64-bit, it maybe is</li>
</ul>
<pre><code>/usr/java/jdk1.6.0_45/jre/lib/amd64/server/libjvm.so`;
</code></pre>
<ul>
<li>On CentOS 32-bit, it maybe is</li>
</ul>
<pre><code>/usr/java/jdk1.7.0_51/jre/lib/i386/server/libjvm.so`;
</code></pre>
<h2>
<a id="user-content-jvm_var" class="anchor" href="#jvm_var" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_var</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_var</strong> <em>name</em> <em>value</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: http</li>
<li>
<strong>repeatable</strong> true</li>
</ul>
<p>Defines a varaible which can be reused in jvm related directives such as <a href="#user-content-jvm_var">jvm_var</a>, <a href="#user-content-jvm_classpath">jvm_classpath</a>, <a href="#user-content-jvm_options">jvm_options</a>.</p>
<p>e.g.</p>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">jvm_var</span> myRoot <span class="pl-s">'/opt/javalibs'</span>;
<span class="pl-k">jvm_var</span> myAgent <span class="pl-s">'#{myRoot}/agent.jar'</span>;
<span class="pl-k">jvm_classpath</span> <span class="pl-s">'#{myAgent}:/opt/anotherLibs/*'</span>;</pre></div>
<h2>
<a id="user-content-jvm_classpath" class="anchor" href="#jvm_classpath" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_classpath</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_classpath</strong> <em>classpaths</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: http</li>
</ul>
<p>Defines class paths those are separated by "<code>:</code>" (Unix like OS) or "<code>;</code>" (Windows) . When '<code>/*</code>' is used after a directory path all files and direct sub-directories will be used as the jvm class path entries. e.g. If /opt/mylibs has below structure.</p>
<pre><code>/opt/mylibs/
-----------/a.jar
-----------/b.jar
-----------/c.zip
-----------/classes (direct sub-directory)
-----------/resources (direct sub-directory)
</code></pre>
<p>And we use below declaration.</p>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">jvm_classpath</span> /opt/mylibs/*;
<span class="pl-c">## there are two equivalent declarations which use quote mark. It is useful when there are some special chars such as ' ', ';' etc.</span>
<span class="pl-c">## jvm_classpath '/opt/mylibs/*';</span>
<span class="pl-c">## jvm_classpath "/opt/mylibs/*";</span>
</pre></div>
<p>It is equivalent to</p>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">jvm_options</span> <span class="pl-s">'-Djava.class.path=/opt/mylibs/a.jar:/opt/mylibs/b.jar:/opt/mylibs/c.zip:/opt/mylibs/classes:/opt/mylibs/resources'</span></pre></div>
<p>We can also define serveral class paths by using separator <code>:</code> (UNIX like OS) or <code>;</code> (Windows), e.g.</p>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">jvm_classpath</span> /opt/mylibs/*:/opt/my-another-libs/*:/opt/my-resources;
<span class="pl-c">## for windows user</span>
<span class="pl-c"># jvm_classpath c:/mylibs/*;c:/my-another-libs/*;c:/my-resources;</span></pre></div>
<p><strong>Note that the behavior about wildcard <code>*</code> here is different from <code>-cp</code> or <code>-classpath</code> option
of jdk/jre java command where wildcard <code>*</code> only means jar files and non-jar files and sub-directories
won't be included.</strong></p>
<h2>
<a id="user-content-jvm_classpath_check" class="anchor" href="#jvm_classpath_check" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_classpath_check</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_classpath_check</strong> on | off;</li>
<li>
<strong>Default</strong>: on</li>
<li>
<strong>Context</strong>: http</li>
</ul>
<p>Enables/disables checking access permission of jvm classpath. Default is on.</p>
<h2>
<a id="user-content-jvm_options" class="anchor" href="#jvm_options" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_options</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_options</strong> <em>jvm-option</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: http</li>
<li>
<strong>repeatable</strong> true</li>
</ul>
<p>Defines one jvm option. e.g.</p>
<div class="highlight highlight-source-nginx"><pre><span class="pl-c">## set initial Java heap size</span>
<span class="pl-k">jvm_options</span> -Xms250m;
<span class="pl-c">## set maximum Java heap size</span>
<span class="pl-k">jvm_options</span> -Xmx1024m;
<span class="pl-c">## set java thread stack size</span>
<span class="pl-k">jvm_options</span> -Xss128k;
<span class="pl-c">## set java system property</span>
<span class="pl-k">jvm_options</span> -Djava.awt.headless=true;</pre></div>
<h2>
<a id="user-content-jvm_workers" class="anchor" href="#jvm_workers" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_workers</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_var</strong> <em>threads-num</em>
</li>
<li>
<strong>Default</strong>: 0</li>
<li>
<strong>Context</strong>: http</li>
</ul>
<p>Enables thread pool mode and defines the threads number of thread pool. Default is disabled.</p>
<h2>
<a id="user-content-jvm_handler_type" class="anchor" href="#jvm_handler_type" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_handler_type</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_handler_type</strong> clojure | java | groovy;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: http</li>
</ul>
<p>Defines the default handler type it will be inherited by child server/location/nested-location context and it will
be overwrited by directives such as content_handler_type, access_handler_type, and so on.
When we use jvm init handler/exit handler we must define it.</p>
<h2>
<a id="user-content-jvm_init_handler_name" class="anchor" href="#jvm_init_handler_name" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_init_handler_name</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_init_handler_name</strong> <em>full-qualified-name</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: http</li>
</ul>
<p>e.g.</p>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">jvm_handler_type</span> java;
<span class="pl-k">jvm_init_handler_name</span> com.foo.handlers.MyJvmInitHandler;
<span class="pl-c">## or for clojure</span>
<span class="pl-k">jvm_handler_type</span> clojure;
<span class="pl-k">jvm_init_handler_name</span> foo.core/my-jvm-init-handler;</pre></div>
<ul>
<li><strong>Java</strong></li>
</ul>
<div class="highlight highlight-source-java"><pre><span class="pl-k">package</span> <span class="pl-smi">com.foo.handlers</span>;
<span class="pl-k">import</span> <span class="pl-smi">nginx.clojure.java.NginxJavaRingHandler</span>;
<span class="pl-k">public</span> <span class="pl-k">class</span> <span class="pl-en">MyJvmInitHandler</span> <span class="pl-k">implements</span> <span class="pl-e">NginxJavaRingHandler</span> {
<span class="pl-k">public</span> <span class="pl-k">Object</span>[] <span class="pl-en">invoke</span>(<span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">String</span>></span> <span class="pl-v">fakeReq</span>) {
<span class="pl-c"><span class="pl-c">//</span>do some initializing here</span>
}
}
</pre></div>
<ul>
<li><strong>Clojure</strong></li>
</ul>
<div class="highlight highlight-source-clojure"><pre>(<span class="pl-k">ns</span> <span class="pl-e">foo.core</span>)
(<span class="pl-k">defn</span> <span class="pl-e">my-jvm-init-handler</span>[_]
<span class="pl-c"><span class="pl-c">;</span>;; do some initializing here </span>
)</pre></div>
<h2>
<a id="user-content-jvm_init_handler_code" class="anchor" href="#jvm_init_handler_code" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_init_handler_code</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_init_handler_code</strong> <em>inline-init-handler-code</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: http</li>
<li>
<strong>repeatable</strong> false</li>
</ul>
<p>e.g.</p>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">jvm_handler_type</span> clojure;
<span class="pl-k">jvm_init_handler_code</span> <span class="pl-s">'(fn[_]</span>
<span class="pl-s"> (do-some-initialization-work)</span>
<span class="pl-s"> nil)</span>
<span class="pl-s">'</span>;</pre></div>
<h2>
<a id="user-content-jvm_exit_handler_name" class="anchor" href="#jvm_exit_handler_name" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_exit_handler_name</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_exit_handler_name</strong> <em>full-qualified-name</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: http</li>
</ul>
<h2>
<a id="user-content-jvm_exit_handler_code" class="anchor" href="#jvm_exit_handler_code" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>jvm_exit_handler_code</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>jvm_exit_handler_code</strong> <em>inline-exit-handler-code</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: http</li>
</ul>
<p>e.g.</p>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">jvm_handler_type</span> clojure;
<span class="pl-k">jvm_exit_handler_code</span> <span class="pl-s">'(fn[_]</span>
<span class="pl-s"> (do-some-cleaning-work)</span>
<span class="pl-s"> nil)</span>
<span class="pl-s">'</span>;</pre></div>
<h2>
<a id="user-content-handlers_lazy_init" class="anchor" href="#handlers_lazy_init" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>handlers_lazy_init</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>handlers_lazy_init</strong> on | off;</li>
<li>
<strong>Default</strong>: off</li>
<li>
<strong>Context</strong>: http, server, location</li>
</ul>
<p>When <code>handlers_lazy_init</code> is on the related handler instance won't be created until the first related request comes.
be inherited by child server/location/nested-location context.</p>
<h2>
<a id="user-content-auto_upgrade_ws" class="anchor" href="#auto_upgrade_ws" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>auto_upgrade_ws</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>auto_upgrade_ws</strong> on | off;</li>
<li>
<strong>Default</strong>: off</li>
<li>
<strong>Context</strong>: http, server, location</li>
</ul>
<p><code>auto_upgrade_ws on</code> is equivalent to</p>
<div class="highlight highlight-source-java"><pre><span class="pl-c"><span class="pl-c">//</span>NginxHttpServerChannel sc = r.hijack(true);</span>
<span class="pl-c"><span class="pl-c">//</span>If we use nginx directive `auto_upgrade_ws on;`, these three lines can be omitted.</span>
<span class="pl-k">if</span> (<span class="pl-k">!</span>sc<span class="pl-k">.</span>webSocketUpgrade(<span class="pl-c1">true</span>)) {
<span class="pl-k">return</span> <span class="pl-c1">null</span>;
}</pre></div>
<h2>
<a id="user-content-content_handler_type" class="anchor" href="#content_handler_type" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>content_handler_type</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>content_handler_type</strong> clojure | java | groovy;</li>
<li>
<strong>Default</strong>: clojure</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<h2>
<a id="user-content-content_handler_name" class="anchor" href="#content_handler_name" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>content_handler_name</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>content_handler_name</strong> <em>full-qualified-name</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Defines an external content handler. e.g.</p>
<ul>
<li><strong>Clojure</strong></li>
</ul>
<div class="highlight highlight-source-clojure"><pre>(<span class="pl-k">ns</span> <span class="pl-e">my.hello</span>)
(<span class="pl-k">defn</span> <span class="pl-e">hello-world</span> [request]
{<span class="pl-c1">:status</span> <span class="pl-c1">200</span>
<span class="pl-c1">:headers</span> {<span class="pl-s"><span class="pl-pds">"</span>Content-Type<span class="pl-pds">"</span></span> <span class="pl-s"><span class="pl-pds">"</span>text/plain<span class="pl-pds">"</span></span>}
<span class="pl-c"><span class="pl-c">;</span>response body can be string, File or Array/Collection/Seq of them</span>
<span class="pl-c1">:body</span> <span class="pl-s"><span class="pl-pds">"</span>Hello World<span class="pl-pds">"</span></span>})
</pre></div>
<p>Then we can reference it in nginx.conf</p>
<div class="highlight highlight-source-nginx"><pre> <span class="pl-k">location</span> <span class="pl-en">/myClojure </span>{
<span class="pl-k">content_handler_type</span> <span class="pl-s">'clojure'</span>;
<span class="pl-k">content_handler_name</span> <span class="pl-s">'my.hello/hello-world'</span>;
}</pre></div>
<ul>
<li><strong>Java</strong></li>
</ul>
<div class="highlight highlight-source-java"><pre><span class="pl-k">package</span> <span class="pl-smi">mytest</span>;
<span class="pl-k">import static</span> <span class="pl-smi">nginx.clojure.MiniConstants.*</span>;
<span class="pl-k">import</span> <span class="pl-smi">nginx.clojure.java.NginxJavaRingHandler</span>;
<span class="pl-k">import</span> <span class="pl-smi">java.util.HashMap</span>;
<span class="pl-k">import</span> <span class="pl-smi">java.util.Map</span>;
<span class="pl-k">public</span> <span class="pl-k">class</span> <span class="pl-en">Hello</span> <span class="pl-k">implements</span> <span class="pl-e">NginxJavaRingHandler</span> {
<span class="pl-k">@Override</span>
<span class="pl-k">public</span> <span class="pl-k">Object</span>[] <span class="pl-en">invoke</span>(<span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">Object</span>></span> <span class="pl-v">request</span>) {
<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-smi">Object</span>[] {
<span class="pl-c1">NGX_HTTP_OK</span>, <span class="pl-c"><span class="pl-c">//</span>http status 200</span>
<span class="pl-smi">ArrayMap</span><span class="pl-k">.</span>create(<span class="pl-c1">CONTENT_TYPE</span>, <span class="pl-s"><span class="pl-pds">"</span>text/plain<span class="pl-pds">"</span></span>), <span class="pl-c"><span class="pl-c">//</span>headers map</span>
<span class="pl-s"><span class="pl-pds">"</span>Hello, Java & Nginx!<span class="pl-pds">"</span></span> <span class="pl-c"><span class="pl-c">//</span>response body can be string, File or Array/Collection of them</span>
};
}
}</pre></div>
<p>In nginx.conf</p>
<div class="highlight highlight-source-nginx"><pre> <span class="pl-k">location</span> <span class="pl-en">/myJava </span>{
<span class="pl-k">content_handler_type</span> <span class="pl-s">'java'</span>;
<span class="pl-k">content_handler_name</span> <span class="pl-s">'mytest.Hello'</span>;
}</pre></div>
<ul>
<li><strong>Groovy</strong></li>
</ul>
<div class="highlight highlight-source-groovy"><pre> <span class="pl-k">package</span> <span class="pl-smi">mytest</span>;
<span class="pl-k">import</span> <span class="pl-smi">nginx.clojure.java.NginxJavaRingHandler</span>;
<span class="pl-k">import</span> <span class="pl-smi">java.util.Map</span>;
<span class="pl-k">public</span> <span class="pl-k">class</span> <span class="pl-en">HelloGroovy</span> <span class="pl-k">implements</span> <span class="pl-e">NginxJavaRingHandler</span> {
<span class="pl-k">public</span> <span class="pl-k">Object</span>[] <span class="pl-en">invoke</span>(<span class="pl-k">Map<<span class="pl-k">String</span>, <span class="pl-k">Object</span>></span> <span class="pl-v">request</span>){
<span class="pl-k">return</span>
[<span class="pl-c1">200</span>, <span class="pl-c"><span class="pl-c">//</span>http status 200</span>
[<span class="pl-s"><span class="pl-pds">"</span>Content-Type<span class="pl-pds">"</span></span>:<span class="pl-s"><span class="pl-pds">"</span>text/html<span class="pl-pds">"</span></span>],<span class="pl-c"><span class="pl-c">//</span>headers map</span>
<span class="pl-s"><span class="pl-pds">"</span>Hello, Groovy & Nginx!<span class="pl-pds">"</span></span> <span class="pl-c"><span class="pl-c">//</span>response body can be string, File or Array/Collection of them</span>
];
}
}</pre></div>
<p>In nginx.conf</p>
<div class="highlight highlight-source-nginx"><pre> <span class="pl-k">location</span> <span class="pl-en">/myJava </span>{
<span class="pl-k">content_handler_type</span> <span class="pl-s">'groovy'</span>;
<span class="pl-k">content_handler_name</span> <span class="pl-s">'mytest.HelloGroovy'</span>;
}</pre></div>
<h2>
<a id="user-content-content_handler_code" class="anchor" href="#content_handler_code" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>content_handler_code</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>content_handler_code</strong> <em>inline-content-handler-code</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Defines an inline content handler. e.g.</p>
<ul>
<li><strong>Clojure</strong></li>
</ul>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">location</span> <span class="pl-en">/hello </span>{
<span class="pl-k">content_handler_type</span> clojure;
<span class="pl-k">content_handler_code</span> <span class="pl-s">'</span>
<span class="pl-s"> (fn[r] {:status 200, {:content-type "text/plain"}, "Hello, Nginx & Clojure!"} )</span>
<span class="pl-s"> '</span>;
}</pre></div>
<ul>
<li><strong>Groovy</strong></li>
</ul>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">location</span> <span class="pl-en">/groovy </span>{
<span class="pl-k">content_handler_type</span> <span class="pl-s">'groovy'</span>;
<span class="pl-k">content_handler_code</span> <span class="pl-s">' </span>
<span class="pl-s"> import nginx.clojure.java.NginxJavaRingHandler;</span>
<span class="pl-s"> import java.util.Map;</span>
<span class="pl-s"> public class HelloGroovy implements NginxJavaRingHandler {</span>
<span class="pl-s"> public Object[] invoke(Map<String, Object> request){</span>
<span class="pl-s"> return [200, //http status 200</span>
<span class="pl-s"> ["Content-Type":"text/html"], //headers map</span>
<span class="pl-s"> "Hello, Groovy & Nginx!"]; //response body can be string, File or Array/Collection of them</span>
<span class="pl-s"> }</span>
<span class="pl-s"> }</span>
<span class="pl-s"> '</span>;
}</pre></div>
<h2>
<a id="user-content-content_handler_property" class="anchor" href="#content_handler_property" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>content_handler_property</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>content_handler_property</strong> name value;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
<li>
<strong>repeatable</strong> true</li>
</ul>
<p>Defines one content handler property. All of those content handler properties belonged to one location will be pass to
the related content handler 's method <code>config(properties)</code> if the content handler implements
the interface <code>nginx.clojure.Configurable</code>.</p>
<h2>
<a id="user-content-rewrite_handler_type" class="anchor" href="#rewrite_handler_type" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>rewrite_handler_type</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>rewrite_handler_type</strong> clojure | java | groovy;</li>
<li>
<strong>Default</strong>: clojure</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<h2>
<a id="user-content-rewrite_handler_name" class="anchor" href="#rewrite_handler_name" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>rewrite_handler_name</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>rewrite_handler_name</strong> <em>full-qualified-name</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Specifies a rewrite handler by a full qualified name. A rewrite handler can be used to set Nginx variables or return errors before
<a href="https://www.nginx.com/resources/admin-guide/reverse-proxy/" rel="nofollow">proxy_pass</a> or content ring handler.
If the rewrite handler returns <code>phase-done</code> (Clojure) or <code>PHASE_DONE</code> (Groovy/Java), nginx will continue to invoke proxy_pass or
content handler. Otherwise if the rewrite handler returns a general response, nginx will send this response to the client and
stop to continue to invoke proxy_pass or content handler.</p>
<blockquote>
<p><strong>Note:</strong>
All rewrite directives, such as <code>rewrite</code>, <code>set</code>, will be executed after the invocation rewrite handler even if
they are declared before nginx rewrtite handler.
So the below example maybe is wrong. For more details about Nginx Variable please check this<br>
<a href="http://openresty.org/download/agentzh-nginx-tutorials-en.html" rel="nofollow">nginx tutorial</a> which explains perfectly the variable scope.</p>
</blockquote>
<div class="highlight highlight-source-nginx"><pre>
<span class="pl-k">location</span> <span class="pl-en">/myproxy </span>{
<span class="pl-c">## It maybe is WRONG!!!</span>
<span class="pl-c">## Because execution of directive `set` is after the execution of Nginx-Clojure rewrite handler</span>
<span class="pl-k">set</span> <span class="pl-smi">$myhost</span> <span class="pl-s">""</span>;
<span class="pl-k">rewrite_handler_type</span> clojure;
<span class="pl-k">rewrite_handler_name</span> <span class="pl-s">'myns.handler/my-rewrite-handler'</span>;
<span class="pl-k">proxy_pass</span> <span class="pl-smi">$myhost</span>
}
</pre></div>
<p>This example is right and there we declare variable $myhost at the outside of <code>location {</code> block.</p>
<div class="highlight highlight-source-nginx"><pre>
<span class="pl-k">set</span> <span class="pl-smi">$myhost</span> <span class="pl-s">""</span>;
<span class="pl-k">location</span> <span class="pl-en">/myproxy </span>{
<span class="pl-k">rewrite_handler_type</span> <span class="pl-s">'clojure'</span>;
<span class="pl-k">rewrite_handler_code</span> <span class="pl-s">'myns.handler/my-rewrite-handler'</span>;
<span class="pl-k">proxy_pass</span> <span class="pl-smi">$myhost</span>;
}
</pre></div>
<div class="highlight highlight-source-clojure"><pre>(<span class="pl-k">ns</span> <span class="pl-e">myns.handler</span>
(<span class="pl-c1">:require</span> [nginx.clojure.core <span class="pl-c1">:as</span> ncc]))
(<span class="pl-k">defn</span> <span class="pl-e">my-rewrite-handler</span>[req]
<span class="pl-c"><span class="pl-c">;</span>compute myhost (upstream name or real host name) based req & remote service, e.g.</span>
(<span class="pl-k">let</span> [myhost (<span class="pl-en">compute-myhost</span> req)])
(<span class="pl-en">ncc/set-ngx-var!</span> req <span class="pl-s"><span class="pl-pds">"</span>myhost<span class="pl-pds">"</span></span> myhost)
<span class="pl-e">ncc</span>/<span class="pl-e">phase-done</span>)</pre></div>
<h2>
<a id="user-content-rewrite_handler_code" class="anchor" href="#rewrite_handler_code" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>rewrite_handler_code</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>rewrite_handler_code</strong> <em>inline-rewrite-handler-code</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Specifies a rewrite handler by a block of inline code.</p>
<p>e.g.</p>
<div class="highlight highlight-source-nginx"><pre>
<span class="pl-k">set</span> <span class="pl-smi">$myhost</span> <span class="pl-s">""</span>;
<span class="pl-k">location</span> <span class="pl-en">/myproxy </span>{
<span class="pl-k">rewrite_handler_type</span> <span class="pl-s">'clojure'</span>;
<span class="pl-k">rewrite_handler_code</span> <span class="pl-s">'</span>
<span class="pl-s"> (do (use <span class="pl-cce">\'</span>[nginx.clojure.core]) </span>
<span class="pl-s"> (fn[req]</span>
<span class="pl-s"> ;compute myhost (upstream name or real host name) based req & remote service, e.g.</span>
<span class="pl-s"> (let [myhost (compute-myhost req)])</span>
<span class="pl-s"> (set-ngx-var! req "myhost" myhost)</span>
<span class="pl-s"> phase-done))</span>
<span class="pl-s"> '</span>;
<span class="pl-k">proxy_pass</span> <span class="pl-smi">$myhost</span>;
} </pre></div>
<h2>
<a id="user-content-rewrite_handler_property" class="anchor" href="#rewrite_handler_property" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>rewrite_handler_property</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>rewrite_handler_property</strong> name value;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
<li>
<strong>repeatable</strong> true</li>
</ul>
<p>Defines one rewrite handler property. All of those rewrite handler properties belonged to one location will be pass to
the related rewrite handler 's method <code>config(properties)</code> if the rewrite handler implements
the interface <code>nginx.clojure.Configurable</code>.</p>
<h2>
<a id="user-content-access_handler_type" class="anchor" href="#access_handler_type" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>access_handler_type</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>access_handler_type</strong> clojure | java | groovy;</li>
<li>
<strong>Default</strong>: clojure</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<h2>
<a id="user-content-access_handler_name" class="anchor" href="#access_handler_name" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>access_handler_name</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>access_handler_name</strong> <em>full-qualified-name</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Access handler runs after rewrite handler and before content handler (e.g. general ring handler, proxy_pass, etc.).
Access handler has the same form with rewrite handle. When it returns <code>phase-done</code> (Clojure) or <code>PHASE_DONE</code> (Groovy/Java)
, Nginx will continue the next phase otherwise nginx will response directly typically with some error information,
such as <code>401 Unauthorized</code>, <code>403 Forbidden</code>, etc.</p>
<p>Here's an example to implement a simple HTTP Basic Authentication.</p>
<div class="highlight highlight-source-nginx"><pre>
<span class="pl-k">location</span> <span class="pl-en">/basicAuth </span>{
<span class="pl-k">access_handler_type</span> <span class="pl-s">'java'</span>;
<span class="pl-k">access_handler_name</span> <span class="pl-s">'my.BasicAuthHandler'</span>;
....
}</pre></div>
<div class="highlight highlight-source-java"><pre>
<span class="pl-c"><span class="pl-c">/**</span></span>
<span class="pl-c"> * This is an example of HTTP basic Authentication.</span>
<span class="pl-c"> * It will require visitor to input a user name (xfeep) and password (hello!) </span>
<span class="pl-c"> * otherwise it will return 401 Unauthorized or BAD USER & PASSWORD </span>
<span class="pl-c"> <span class="pl-c">*/</span></span>
<span class="pl-k">public</span> <span class="pl-k">class</span> <span class="pl-en">BasicAuthHandler</span> <span class="pl-k">implements</span> <span class="pl-e">NginxJavaRingHandler</span> {
<span class="pl-k">@Override</span>
<span class="pl-k">public</span> <span class="pl-k">Object</span>[] <span class="pl-en">invoke</span>(<span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">Object</span>></span> <span class="pl-v">request</span>) {
<span class="pl-smi">String</span> auth <span class="pl-k">=</span> (<span class="pl-smi">String</span>) ((<span class="pl-smi">Map</span>)request<span class="pl-k">.</span>get(<span class="pl-c1">HEADERS</span>))<span class="pl-k">.</span>get(<span class="pl-s"><span class="pl-pds">"</span>authorization<span class="pl-pds">"</span></span>);
<span class="pl-k">if</span> (auth <span class="pl-k">==</span> <span class="pl-c1">null</span>) {
<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-smi">Object</span>[] { <span class="pl-c1">401</span>, <span class="pl-smi">ArrayMap</span><span class="pl-k">.</span>create(<span class="pl-s"><span class="pl-pds">"</span>www-authenticate<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>Basic realm=<span class="pl-cce">\"</span>Secure Area<span class="pl-cce">\"</span><span class="pl-pds">"</span></span>),
<span class="pl-s"><span class="pl-pds">"</span><HTML><BODY><H1>401 Unauthorized.</H1></BODY></HTML><span class="pl-pds">"</span></span> };
}
<span class="pl-k">String</span>[] up <span class="pl-k">=</span> <span class="pl-k">new</span> <span class="pl-smi">String</span>(<span class="pl-smi">DatatypeConverter</span><span class="pl-k">.</span>parseBase64Binary(auth<span class="pl-k">.</span>substring(<span class="pl-s"><span class="pl-pds">"</span>Basic <span class="pl-pds">"</span></span><span class="pl-k">.</span>length())), <span class="pl-c1">DEFAULT_ENCODING</span>)<span class="pl-k">.</span>split(<span class="pl-s"><span class="pl-pds">"</span>:<span class="pl-pds">"</span></span>);
<span class="pl-k">if</span> (up[<span class="pl-c1">0</span>]<span class="pl-k">.</span>equals(<span class="pl-s"><span class="pl-pds">"</span>xfeep<span class="pl-pds">"</span></span>) <span class="pl-k">&&</span> up[<span class="pl-c1">1</span>]<span class="pl-k">.</span>equals(<span class="pl-s"><span class="pl-pds">"</span>hello!<span class="pl-pds">"</span></span>)) {
<span class="pl-k">return</span> <span class="pl-c1">PHASE_DONE</span>;
}
<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-smi">Object</span>[] { <span class="pl-c1">401</span>, <span class="pl-smi">ArrayMap</span><span class="pl-k">.</span>create(<span class="pl-s"><span class="pl-pds">"</span>www-authenticate<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>Basic realm=<span class="pl-cce">\"</span>Secure Area<span class="pl-cce">\"</span><span class="pl-pds">"</span></span>),
<span class="pl-s"><span class="pl-pds">"</span><HTML><BODY><H1>401 Unauthorized BAD USER & PASSWORD.</H1></BODY></HTML><span class="pl-pds">"</span></span> };
}
}</pre></div>
<h2>
<a id="user-content-access_handler_code" class="anchor" href="#access_handler_code" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>access_handler_code</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>access_handler_code</strong> <em>inline-access-handler-code</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Specifies a access handler by a block of inline code. See <a href="#user-content-access_handler_name">access_handler_name</a>.</p>
<h2>
<a id="user-content-access_handler_property" class="anchor" href="#access_handler_property" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>access_handler_property</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>access_handler_property</strong> name value;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
<li>
<strong>repeatable</strong> true</li>
</ul>
<p>Defines one access handler property. All of those access handler properties belonged to one location will be pass to
the related access handler 's method <code>config(properties)</code> if the access handler implements
the interface <code>nginx.clojure.Configurable</code>.</p>
<h2>
<a id="user-content-header_filter_type" class="anchor" href="#header_filter_type" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>header_filter_type</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>header_filter_type</strong> clojure | java | groovy;</li>
<li>
<strong>Default</strong>: clojure</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<h2>
<a id="user-content-header_filter_name" class="anchor" href="#header_filter_name" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>header_filter_name</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>header_filter_name</strong> <em>full-qualified-name</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Specifies a header filter by a full qualified name.</p>
<p>We can use header filter to do some useful things, e.g.</p>
<ol>
<li>monitor the time cost of requests processed</li>
<li>modify the response header dynamically</li>
<li>write user defined log</li>
</ol>
<p>Header filter has the same return form with rewrite handler/ access handler.
When it returns <code>phase-done</code> (Clojure) or <code>PHASE_DONE</code> (Groovy/Java), Nginx will
continue the next phase otherwise Nginx will response directly typically with some error information.</p>
<p>This example will add more headers to the response.</p>
<ul>
<li><strong>Java/Groovy</strong></li>
</ul>
<div class="highlight highlight-source-nginx"><pre>
<span class="pl-k">location</span> <span class="pl-en">/javafilter </span>{
<span class="pl-k">header_filter_type</span> <span class="pl-s">'java'</span>;
<span class="pl-k">header_filter_name</span> <span class="pl-s">'my.AddMoreHeaders'</span>;
..................
}</pre></div>
<div class="highlight highlight-source-java"><pre>
<span class="pl-k">package</span> <span class="pl-smi">my</span>;
<span class="pl-k">import</span> <span class="pl-smi">nginx.clojure.java.NginxJavaRingHandler</span>;
<span class="pl-k">import</span> <span class="pl-smi">nginx.clojure.java.Constants</span>;
<span class="pl-k">public</span> <span class="pl-k">class</span> <span class="pl-en">RemoveAndAddMoreHeaders</span> <span class="pl-k">implements</span> <span class="pl-e">NginxJavaHeaderFilter</span> {
<span class="pl-k">@Override</span>
<span class="pl-k">public</span> <span class="pl-k">Object</span>[] <span class="pl-en">doFilter</span>(<span class="pl-k">int</span> <span class="pl-v">status</span>, <span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">Object</span>></span> <span class="pl-v">request</span>, <span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">Object</span>></span> <span class="pl-v">responseHeaders</span>) {
responseHeaders<span class="pl-k">.</span>remove(<span class="pl-s"><span class="pl-pds">"</span>Content-Type<span class="pl-pds">"</span></span>);
responseHeaders<span class="pl-k">.</span>put(<span class="pl-s"><span class="pl-pds">"</span>Content-Type<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>text/html<span class="pl-pds">"</span></span>);
responseHeaders<span class="pl-k">.</span>put(<span class="pl-s"><span class="pl-pds">"</span>Xfeep-Header<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>Hello2!<span class="pl-pds">"</span></span>);
responseHeaders<span class="pl-k">.</span>put(<span class="pl-s"><span class="pl-pds">"</span>Server<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>My-Test-Server<span class="pl-pds">"</span></span>);
<span class="pl-k">return</span> <span class="pl-smi">Constants</span><span class="pl-c1"><span class="pl-k">.</span>PHASE_DONE</span>;
}
}</pre></div>
<ul>
<li><strong>Clojure</strong></li>
</ul>
<div class="highlight highlight-source-nginx"><pre>
<span class="pl-k">location</span> <span class="pl-en">/javafilter </span>{
<span class="pl-k">header_filter_type</span> <span class="pl-s">'clojure'</span>;
<span class="pl-k">header_filter_name</span> <span class="pl-s">'my/remove-and-add-more-headers'</span>;
..................
}</pre></div>
<div class="highlight highlight-source-clojure"><pre>
(<span class="pl-k">ns</span> <span class="pl-e">my</span>
(<span class="pl-c1">:use</span> [nginx.clojure.core])
(<span class="pl-c1">:require</span> [clj-http.client <span class="pl-c1">:as</span> client]))
(<span class="pl-k">defn</span> <span class="pl-e">remove-and-add-more-headers</span>
[status request response-headers]
(<span class="pl-en">dissoc!</span> response-headers <span class="pl-s"><span class="pl-pds">"</span>Content-Type<span class="pl-pds">"</span></span>)
(<span class="pl-en">assoc!</span> response-headers <span class="pl-s"><span class="pl-pds">"</span>Content-Type<span class="pl-pds">"</span></span> <span class="pl-s"><span class="pl-pds">"</span>text/html<span class="pl-pds">"</span></span>)
(<span class="pl-en">assoc!</span> response-headers <span class="pl-s"><span class="pl-pds">"</span>Xfeep-Header<span class="pl-pds">"</span></span> <span class="pl-s"><span class="pl-pds">"</span>Hello2!<span class="pl-pds">"</span></span>)
(<span class="pl-en">assoc!</span> response-headers <span class="pl-s"><span class="pl-pds">"</span>Server<span class="pl-pds">"</span></span> <span class="pl-s"><span class="pl-pds">"</span>My-Test-Server<span class="pl-pds">"</span></span>)
<span class="pl-e">phase-done</span>)</pre></div>
<h2>
<a id="user-content-header_filter_code" class="anchor" href="#header_filter_code" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>header_filter_code</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>header_filter_code</strong> <em>inline-header-filter-code</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Specifies a header filter by a block of inline code. See <a href="#user-content-header_filter_name">header_filter_name</a>.</p>
<h2>
<a id="user-content-header_filter_property" class="anchor" href="#header_filter_property" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>header_filter_property</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>header_filter_property</strong> name value;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
<li>
<strong>repeatable</strong> true</li>
</ul>
<p>Defines one header filter property. All of those header filter properties belonged to one location will be pass to
the related header filter 's method <code>config(properties)</code> if the header filter implements
the interface <code>nginx.clojure.Configurable</code>.</p>
<h2>
<a id="user-content-body_filter_type" class="anchor" href="#body_filter_type" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>body_filter_type</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>body_filter_type</strong> clojure | java | groovy;</li>
<li>
<strong>Default</strong>: clojure</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<h2>
<a id="user-content-body_filter_name" class="anchor" href="#body_filter_name" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>body_filter_name</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>body_filter_name</strong> <em>full-qualified-name</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Specifies a body filter by a full qualified name.</p>
<p>We can use body filter to modify/replace body content.</p>
<p>A stream faced Java body filter should implement the interface NginxJavaBodyFilter which has this method:</p>
<div class="highlight highlight-source-java"><pre><span class="pl-k">public</span> <span class="pl-k">Object</span>[] doFilter(<span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">Object</span>></span> request, <span class="pl-smi">InputStream</span> bodyChunk, <span class="pl-k">boolean</span> isLast) throws <span class="pl-smi">IOException</span>;</pre></div>
<p>For one request this method can be invoked multiple times and at the last time the argument
<code>isLast</code> will be true. Note that <code>bodyChunk</code> is valid only at its call scope and can
not be stored for later usage.
The result returned must be an array which has three elements viz. {status, headers, filtered_chunk}.
If <code>status</code> is not null <code>filtered_chunk</code> will be used as the final chunk. <code>status</code> and <code>headers</code> will
be ignored when the response headers has been sent already.
<code>filtered_chunk</code> can be either of</p>
<ol>
<li>File, viz. java.io.File</li>
<li>String</li>
<li>InputStream</li>
<li>Array/Iterable, e.g. Array/List/Set of above types</li>
</ol>
<p>A string faced Java body filter should extends the class StringFacedJavaBodyFilter which has one protected method to be overriden:</p>
<div class="highlight highlight-source-java"><pre><span class="pl-k">protected</span> <span class="pl-k">Object</span>[] doFilter(<span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">Object</span>></span> request, <span class="pl-smi">String</span> body, <span class="pl-k">boolean</span> isLast) throws <span class="pl-smi">IOException</span></pre></div>
<p>This method has the same return value with <code>NginxJavaBodyFilter.doFilter</code>.</p>
<p>This example will make to body content to upper case.</p>
<ul>
<li><strong>Java/Groovy</strong></li>
</ul>
<div class="highlight highlight-source-nginx"><pre>
<span class="pl-k">location</span> <span class="pl-en">/upperfilter </span>{
<span class="pl-k">body_filter_type</span> <span class="pl-s">'java'</span>;
<span class="pl-k">body_filter_name</span> <span class="pl-s">'my.UppercaseBodyFilter'</span>;
..................
}</pre></div>
<div class="highlight highlight-source-java"><pre>
<span class="pl-k">package</span> <span class="pl-smi">my</span>;
<span class="pl-k">import</span> <span class="pl-smi">nginx.clojure.java.NginxJavaRingHandler</span>;
<span class="pl-k">import</span> <span class="pl-smi">nginx.clojure.java.Constants</span>;
<span class="pl-k">import</span> <span class="pl-smi">nginx.clojure.java.StringFacedJavaBodyFilter</span>;
<span class="pl-k">public</span> <span class="pl-k">static</span> <span class="pl-k">class</span> <span class="pl-en">UppercaseBodyFilter</span> <span class="pl-k">extends</span> <span class="pl-e">StringFacedJavaBodyFilter</span> {
<span class="pl-k">@Override</span>
<span class="pl-k">protected</span> <span class="pl-k">Object</span>[] <span class="pl-en">doFilter</span>(<span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">Object</span>></span> <span class="pl-v">request</span>, <span class="pl-smi">String</span> <span class="pl-v">body</span>, <span class="pl-k">boolean</span> <span class="pl-v">isLast</span>) <span class="pl-k">throws</span> <span class="pl-smi">IOException</span> {
<span class="pl-k">if</span> (isLast) {
<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-smi">Object</span>[] {<span class="pl-c1">200</span>, <span class="pl-c1">null</span>, body<span class="pl-k">.</span>toUpperCase()};
}<span class="pl-k">else</span> {
<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-smi">Object</span>[] {<span class="pl-c1">null</span>, <span class="pl-c1">null</span>, body<span class="pl-k">.</span>toUpperCase()};
}
}
}</pre></div>
<ul>
<li><strong>Clojure</strong></li>
</ul>
<div class="highlight highlight-source-nginx"><pre>
<span class="pl-k">location</span> <span class="pl-en">/upperfilter </span>{
<span class="pl-k">body_filter_type</span> <span class="pl-s">'clojure'</span>;
<span class="pl-k">body_filter_name</span> <span class="pl-s">'my/uppercase-filter'</span>;
..................
}</pre></div>
<div class="highlight highlight-source-clojure"><pre>
(<span class="pl-k">defn</span> <span class="pl-e">uppercase-filter</span> [request body-chunk last?]
(<span class="pl-k">let</span> [upper-body (<span class="pl-en">.toUpperCase</span> body-chunk)]
(<span class="pl-k">if</span> last? {<span class="pl-c1">:status</span> <span class="pl-c1">200</span> <span class="pl-c1">:body</span> upper-body}
{<span class="pl-c1">:body</span> upper-body})))</pre></div>
<h2>
<a id="user-content-body_filter_code" class="anchor" href="#body_filter_code" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>body_filter_code</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>body_filter_code</strong> <em>inline-body-filter-code</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Specifies a header filter by a block of inline code. See <a href="#user-content-body_filter_name">body_filter_name</a>.</p>
<h2>
<a id="user-content-body_filter_property" class="anchor" href="#body_filter_property" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>body_filter_property</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>body_filter_property</strong> name value;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
<li>
<strong>repeatable</strong> true</li>
</ul>
<p>Defines one body filter property. All of those body filter properties belonged to one location will be pass to
the related body filter 's method <code>config(properties)</code> if the body filter implements
the interface <code>nginx.clojure.Configurable</code>.</p>
<h2>
<a id="user-content-log_handler_type" class="anchor" href="#log_handler_type" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>log_handler_type</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>log_handler_type</strong> clojure | java | groovy;</li>
<li>
<strong>Default</strong>: clojure</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<h2>
<a id="user-content-log_handler_name" class="anchor" href="#log_handler_name" aria-hidden="true"><span aria-hidden="true" class="octicon octicon-link"></span></a>log_handler_name</h2>
<ul>
<li>
<strong>Syntax</strong>: <strong>log_handler_name</strong> <em>full-qualified-name</em>;</li>
<li>
<strong>Default</strong>: —</li>
<li>
<strong>Context</strong>: location</li>
</ul>
<p>Defines an external log handler. e.g.</p>
<p>Nginx log handler will be called just before the request is destroyed and its return result will be ignored.
In a log handler we should not modify any thing about this request such as header, status. response, body and so on.</p>
<p>e.g. we can write access log just like</p>
<pre><code>127.0.0.1 - x 26/Oct/2019:13:54:08 +0800 GET /cljloghandler/simpleloghandler HTTP/1.1 200 20 x curl/7.64.0
127.0.0.1 - x 26/Oct/2019:14:44:57 +0800 GET /cljloghandler/simpleloghandler HTTP/1.1 200 20 x curl/7.64.0
127.0.0.1 - x 26/Oct/2019:14:59:03 +0800 GET //cljloghandler/simpleloghandler HTTP/1.1 200 20 x Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36
</code></pre>
<ul>
<li><strong>Java</strong></li>
</ul>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">location</span> <span class="pl-en">/hello </span>{
....
<span class="pl-k">log_handler_type</span> java;
<span class="pl-k">log_handler_name</span> mytest.MyLogHandler;
<span class="pl-k">log_handler_property</span> logUserAgent<span class="pl-c1"> on</span>;
}
</pre></div>
<div class="highlight highlight-source-java"><pre> <span class="pl-k">public</span> <span class="pl-k">static</span> <span class="pl-k">class</span> <span class="pl-en">SimpleLogHandler</span> <span class="pl-k">implements</span> <span class="pl-e">NginxJavaRingHandler</span>, <span class="pl-e">Configurable</span> {
<span class="pl-k">boolean</span> logUserAgent;
<span class="pl-k">@Override</span>
<span class="pl-k">public</span> <span class="pl-k">Object</span>[] <span class="pl-en">invoke</span>(<span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">Object</span>></span> <span class="pl-v">request</span>) <span class="pl-k">throws</span> <span class="pl-smi">IOException</span> {
<span class="pl-smi">File</span> file <span class="pl-k">=</span> <span class="pl-k">new</span> <span class="pl-smi">File</span>(<span class="pl-s"><span class="pl-pds">"</span>logs/SimpleLogHandler.log<span class="pl-pds">"</span></span>);
<span class="pl-smi">NginxJavaRequest</span> r <span class="pl-k">=</span> (<span class="pl-smi">NginxJavaRequest</span>) request;
<span class="pl-k">try</span> (<span class="pl-smi">FileOutputStream</span> out <span class="pl-k">=</span> <span class="pl-k">new</span> <span class="pl-smi">FileOutputStream</span>(file, <span class="pl-c1">true</span>)) {
<span class="pl-smi">String</span> msg <span class="pl-k">=</span> <span class="pl-smi">String</span><span class="pl-k">.</span>format(<span class="pl-s"><span class="pl-pds">"</span>%s - %s [%s] <span class="pl-cce">\"</span>%s<span class="pl-cce">\"</span> %s <span class="pl-cce">\"</span>%s<span class="pl-cce">\"</span> %s %s<span class="pl-cce">\n</span><span class="pl-pds">"</span></span>, r<span class="pl-k">.</span>getVariable(<span class="pl-s"><span class="pl-pds">"</span>remote_addr<span class="pl-pds">"</span></span>),
r<span class="pl-k">.</span>getVariable(<span class="pl-s"><span class="pl-pds">"</span>remote_user<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>x<span class="pl-pds">"</span></span>), r<span class="pl-k">.</span>getVariable(<span class="pl-s"><span class="pl-pds">"</span>time_local<span class="pl-pds">"</span></span>), r<span class="pl-k">.</span>getVariable(<span class="pl-s"><span class="pl-pds">"</span>request<span class="pl-pds">"</span></span>),
r<span class="pl-k">.</span>getVariable(<span class="pl-s"><span class="pl-pds">"</span>status<span class="pl-pds">"</span></span>), r<span class="pl-k">.</span>getVariable(<span class="pl-s"><span class="pl-pds">"</span>body_bytes_sent<span class="pl-pds">"</span></span>), r<span class="pl-k">.</span>getVariable(<span class="pl-s"><span class="pl-pds">"</span>http_referer<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>x<span class="pl-pds">"</span></span>),
logUserAgent <span class="pl-k">?</span> r<span class="pl-k">.</span>getVariable(<span class="pl-s"><span class="pl-pds">"</span>http_user_agent<span class="pl-pds">"</span></span>) <span class="pl-k">:</span> <span class="pl-s"><span class="pl-pds">"</span>-<span class="pl-pds">"</span></span>);
out<span class="pl-k">.</span>write(msg<span class="pl-k">.</span>getBytes(<span class="pl-s"><span class="pl-pds">"</span>utf8<span class="pl-pds">"</span></span>));
}
<span class="pl-k">return</span> <span class="pl-c1">null</span>;
}
<span class="pl-k">@Override</span>
<span class="pl-k">public</span> <span class="pl-k">void</span> <span class="pl-en">config</span>(<span class="pl-k">Map<<span class="pl-smi">String</span>, <span class="pl-smi">String</span>></span> <span class="pl-v">properties</span>) {
logUserAgent <span class="pl-k">=</span> <span class="pl-s"><span class="pl-pds">"</span>on<span class="pl-pds">"</span></span><span class="pl-k">.</span>equalsIgnoreCase(properties<span class="pl-k">.</span>get(<span class="pl-s"><span class="pl-pds">"</span>logUserAgent<span class="pl-pds">"</span></span>));
}
<span class="pl-k">@Override</span>
<span class="pl-k">public</span> <span class="pl-k">String</span>[] <span class="pl-en">variablesNeedPrefetch</span>() {
<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-smi">String</span>[] { <span class="pl-s"><span class="pl-pds">"</span>remote_addr<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>remote_user<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>time_local<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>request<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>status<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>body_bytes_sent<span class="pl-pds">"</span></span>,
<span class="pl-s"><span class="pl-pds">"</span>http_referer<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>http_user_agent<span class="pl-pds">"</span></span> };
}
}</pre></div>
<ul>
<li><strong>Clojure</strong></li>
</ul>
<div class="highlight highlight-source-nginx"><pre><span class="pl-k">location</span> <span class="pl-en">/hello </span>{
<span class="pl-k">log_handler_type</span> clojure;