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<table id="source"><tbody><tr><td><h1>Connect SessionVOC</h1><p>secure, reliable, external session database SessionVOC</p></td><td></td></tr><tr class="filename"><td><h2 id="lib/connect-sessionvoc.js"><a href="#">connect-sessionvoc</a></h2></td><td>lib/connect-sessionvoc.js</td></tr><tr class="code">
<td class="docs">
<hr></hr>

<hr></hr>
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<td class="code">

</td>
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<tr class="code">
<td class="docs">
<p>Module dependencies.
 </p>
</td>
<td class="code">
<pre><code><span class="keyword">var</span> <span class="variable">connect</span> = <span class="variable">require</span>(<span class="string">'connect'</span>),
    <span class="class">Session</span> = <span class="variable">connect</span>.<span class="variable">session</span>.<span class="class">Session</span>,
    <span class="class">Store</span> = <span class="variable">connect</span>.<span class="variable">session</span>.<span class="class">Store</span>,
    <span class="variable">utils</span> = <span class="variable">connect</span>.<span class="variable">utils</span>,
    <span class="variable">http</span> = <span class="variable">require</span>(<span class="string">'http'</span>),
    <span class="variable">sys</span> = <span class="variable">require</span>(<span class="string">'sys'</span>);</code></pre>
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<tr class="code">
<td class="docs">
<p>Exports.
 </p>
</td>
<td class="code">
<pre><code><span class="variable">exports</span> = <span class="variable">module</span>.<span class="variable">exports</span>;</code></pre>
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<tr class="code">
<td class="docs">
<p>Exports the constructors.
 </p>
</td>
<td class="code">
<pre><code><span class="variable">exports</span>.<span class="class">SessionVocStore</span> = <span class="class">SessionVocStore</span>;</code></pre>
</td>
</tr>
<tr class="code">
<td class="docs">
<p>Exports the debugging flag.
 </p>
</td>
<td class="code">
<pre><code><span class="variable">exports</span>.<span class="variable">debug</span> = <span class="variable">true</span>;</code></pre>
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<td class="docs">
<hr></hr>

<hr></hr>
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<td class="docs">
<p>Client-server communication methods.
 </p>
</td>
<td class="code">
<pre><code><span class="keyword">var</span> <span class="class">COMM_NONE</span> = <span class="number integer">0</span>,
    <span class="class">COMM_SIMPLE</span> = <span class="number integer">1</span>,
    <span class="class">COMM_CHALLENGE_RESPONSE</span> = <span class="number integer">2</span>;</code></pre>
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<td class="docs">
<hr></hr>

<hr></hr>
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<td class="docs">
<p>Initializes a new <code>SessionVocStore</code>. You can define an options array to specifiy
the host and port.</p>

<h2></h2>

<ul><li><p><strong>param</strong>: <em>Object</em>  options</p></li><li><p><strong>api</strong>: <em>public</em></p></li></ul>
</td>
<td class="code">
<pre><code><span class="keyword">function</span> <span class="class">SessionVocStore</span> (<span class="variable">options</span>) {
  <span class="class">Object</span>.<span class="variable">defineProperty</span>(<span class="this">this</span>, <span class="string">'host'</span>, { <span class="variable">value</span>: (<span class="variable">options</span> &<span class="variable">amp</span>;&<span class="variable">amp</span>; <span class="variable">options</span>.<span class="variable">host</span>) || <span class="string">'localhost'</span> });
  <span class="class">Object</span>.<span class="variable">defineProperty</span>(<span class="this">this</span>, <span class="string">'port'</span>, { <span class="variable">value</span>: (<span class="variable">options</span> &<span class="variable">amp</span>;&<span class="variable">amp</span>; <span class="variable">options</span>.<span class="variable">port</span>) || <span class="number integer">8208</span> });

  <span class="this">this</span>.<span class="variable">description</span> = <span class="string">'Sescure and reliable session store using a SessionVOC'</span>;
  <span class="this">this</span>.<span class="variable">datainfo</span> = <span class="keyword">null</span>;
};</code></pre>
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</tr>
<tr class="code">
<td class="docs">
<p>Inherit from <code>Store.prototype</code>.
 </p>
</td>
<td class="code">
<pre><code><span class="class">SessionVocStore</span>.<span class="variable">prototype</span>.<span class="variable">__proto__</span> = <span class="class">Store</span>.<span class="variable">prototype</span>;</code></pre>
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<td class="docs">
<p>Creates a new session.</p>

<h2></h2>

<ul><li><p><strong>param</strong>: <em>function</em>  next</p></li></ul>
</td>
<td class="code">
<pre><code><span class="class">SessionVocStore</span>.<span class="variable">prototype</span>.<span class="variable">createSession</span> = <span class="keyword">function</span> (<span class="variable">next</span>) {
  <span class="keyword">var</span> <span class="variable">host</span> = <span class="this">this</span>.<span class="variable">host</span>;
  <span class="keyword">var</span> <span class="variable">port</span> = <span class="this">this</span>.<span class="variable">port</span>;

  <span class="variable">debuglog</span>(<span class="string">'createSession('</span> + <span class="variable">host</span> + <span class="string">', '</span> + <span class="variable">port</span> + <span class="string">')'</span>);

  <span class="variable">checkDatainfo</span>(<span class="this">this</span>, <span class="variable">next</span>,
                <span class="keyword">function</span> () {
                  <span class="variable">sessionvocRequest</span>(<span class="variable">svo</span>(<span class="variable">host</span>, <span class="variable">port</span>, <span class="string">'/session'</span>, <span class="string">'POST'</span>), <span class="keyword">null</span>, <span class="variable">next</span>);
                });
};</code></pre>
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<tr class="code">
<td class="docs">
<p>Loads an existing session.</p>

<h2></h2>

<ul><li><p><strong>param</strong>: <em>function</em>  next</p></li></ul>
</td>
<td class="code">
<pre><code><span class="class">SessionVocStore</span>.<span class="variable">prototype</span>.<span class="variable">loadSession</span> = <span class="keyword">function</span> (<span class="variable">sid</span>, <span class="variable">next</span>) {
  <span class="keyword">var</span> <span class="variable">host</span> = <span class="this">this</span>.<span class="variable">host</span>;
  <span class="keyword">var</span> <span class="variable">port</span> = <span class="this">this</span>.<span class="variable">port</span>;

  <span class="variable">debuglog</span>(<span class="string">'loadSession('</span> + <span class="variable">sid</span> + <span class="string">', '</span> + <span class="variable">host</span> + <span class="string">', '</span> + <span class="variable">port</span> + <span class="string">')'</span>);

  <span class="variable">checkDatainfo</span>(<span class="this">this</span>, <span class="variable">next</span>,
                <span class="keyword">function</span> () {
                  <span class="variable">sessionvocRequest</span>(<span class="variable">svo</span>(<span class="variable">host</span>, <span class="variable">port</span>, <span class="string">'/session/'</span> + <span class="variable">sid</span>, <span class="string">'GET'</span>),  <span class="keyword">null</span>, <span class="variable">next</span>);
                });
};</code></pre>
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<tr class="code">
<td class="docs">
<p>Updates an existing session.</p>

<h2></h2>

<ul><li><p><strong>param</strong>: <em>function</em>  data</p></li><li><p><strong>param</strong>: <em>function</em>  next</p></li></ul>
</td>
<td class="code">
<pre><code><span class="class">SessionVocStore</span>.<span class="variable">prototype</span>.<span class="variable">updateSession</span> = <span class="keyword">function</span> (<span class="variable">sid</span>, <span class="variable">data</span>, <span class="variable">next</span>) {
  <span class="keyword">var</span> <span class="variable">host</span> = <span class="this">this</span>.<span class="variable">host</span>;
  <span class="keyword">var</span> <span class="variable">port</span> = <span class="this">this</span>.<span class="variable">port</span>;

  <span class="variable">debuglog</span>(<span class="string">'updateSession('</span> + <span class="variable">sid</span> + <span class="string">', '</span> + <span class="variable">host</span> + <span class="string">', '</span> + <span class="variable">port</span> + <span class="string">')'</span>);

  <span class="variable">checkDatainfo</span>(<span class="this">this</span>, <span class="variable">next</span>,
                <span class="keyword">function</span> () {
                  <span class="variable">sessionvocRequest</span>(<span class="variable">svo</span>(<span class="variable">host</span>, <span class="variable">port</span>, <span class="string">'/session/'</span> + <span class="variable">sid</span>, <span class="string">'PUT'</span>), <span class="class">JSON</span>.<span class="variable">stringify</span>(<span class="variable">data</span>), <span class="variable">next</span>);
                });
};</code></pre>
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</tr>
<tr class="code">
<td class="docs">
<p>Deletes an existing session.</p>

<h2></h2>

<ul><li><p><strong>param</strong>: <em>function</em>  next</p></li></ul>
</td>
<td class="code">
<pre><code><span class="class">SessionVocStore</span>.<span class="variable">prototype</span>.<span class="variable">deleteSession</span> = <span class="keyword">function</span> (<span class="variable">sid</span>, <span class="variable">next</span>) {
  <span class="keyword">var</span> <span class="variable">host</span> = <span class="this">this</span>.<span class="variable">host</span>;
  <span class="keyword">var</span> <span class="variable">port</span> = <span class="this">this</span>.<span class="variable">port</span>;

  <span class="variable">debuglog</span>(<span class="string">'deleteSession('</span> + <span class="variable">sid</span> + <span class="string">', '</span> + <span class="variable">host</span> + <span class="string">', '</span> + <span class="variable">port</span> + <span class="string">')'</span>);

  <span class="variable">checkDatainfo</span>(<span class="this">this</span>, <span class="variable">next</span>,
                <span class="keyword">function</span> () {
                  <span class="variable">sessionvocRequest</span>(<span class="variable">svo</span>(<span class="variable">host</span>, <span class="variable">port</span>, <span class="string">'/session/'</span> + <span class="variable">sid</span>, <span class="string">'DELETE'</span>), <span class="keyword">null</span>, <span class="variable">next</span>);
                });
};</code></pre>
</td>
</tr>
<tr class="code">
<td class="docs">
<p>Logs in a session.</p>

<h2></h2>

<ul><li><p><strong>param</strong>: <em>function</em>  username</p></li><li><p><strong>param</strong>: <em>function</em>  password</p></li><li><p><strong>param</strong>: <em>function</em>  next</p></li></ul>
</td>
<td class="code">
<pre><code><span class="class">SessionVocStore</span>.<span class="variable">prototype</span>.<span class="variable">login</span> = <span class="keyword">function</span> (<span class="variable">sid</span>, <span class="variable">username</span>, <span class="variable">password</span>, <span class="variable">next</span>) {
  <span class="keyword">var</span> <span class="variable">host</span> = <span class="this">this</span>.<span class="variable">host</span>;
  <span class="keyword">var</span> <span class="variable">port</span> = <span class="this">this</span>.<span class="variable">port</span>;

  <span class="variable">debuglog</span>(<span class="string">'login('</span> + <span class="variable">sid</span> + <span class="string">', '</span> + <span class="variable">username</span> + <span class="string">', ..., '</span> + <span class="variable">host</span> + <span class="string">', '</span> + <span class="variable">port</span> + <span class="string">')'</span>);

  <span class="variable">sessionvocRequest</span>(<span class="variable">svo</span>(<span class="variable">host</span>, <span class="variable">port</span>, <span class="string">'/session/'</span> + <span class="variable">sid</span> + <span class="string">'/authenticate'</span>, <span class="string">'PUT'</span>),
                    <span class="class">JSON</span>.<span class="variable">stringify</span>({ <span class="string">'uid'</span> : <span class="variable">username</span>, <span class="string">'password'</span> : <span class="variable">password</span> }),
                    <span class="variable">next</span>);
}</code></pre>
</td>
</tr>
<tr class="code">
<td class="docs">
<p>Logs out a session.</p>

<h2></h2>

<ul><li><p><strong>param</strong>: <em>function</em>  username</p></li><li><p><strong>param</strong>: <em>function</em>  password</p></li><li><p><strong>param</strong>: <em>function</em>  next</p></li></ul>
</td>
<td class="code">
<pre><code><span class="class">SessionVocStore</span>.<span class="variable">prototype</span>.<span class="variable">logout</span> = <span class="keyword">function</span> (<span class="variable">sid</span>, <span class="variable">next</span>) {
  <span class="keyword">var</span> <span class="variable">host</span> = <span class="this">this</span>.<span class="variable">host</span>;
  <span class="keyword">var</span> <span class="variable">port</span> = <span class="this">this</span>.<span class="variable">port</span>;

  <span class="variable">debuglog</span>(<span class="string">'login('</span> + <span class="variable">sid</span> + <span class="string">', '</span> + <span class="variable">host</span> + <span class="string">', '</span> + <span class="variable">port</span> + <span class="string">')'</span>);

  <span class="variable">sessionvocRequest</span>(<span class="variable">svo</span>(<span class="variable">host</span>, <span class="variable">port</span>, <span class="string">'/session/'</span> + <span class="variable">sid</span> + <span class="string">'/logout'</span>, <span class="string">'PUT'</span>), <span class="keyword">null</span>, <span class="variable">next</span>);
}

<span class="comment">////////////////////////////////////////////////////////////////////////////////</span>
<span class="comment">// Helper functions</span>
<span class="comment">////////////////////////////////////////////////////////////////////////////////</span></code></pre>
</td>
</tr>
<tr class="code">
<td class="docs">
<p>Log informational output if debug flag is set.
 </p>
</td>
<td class="code">
<pre><code><span class="keyword">function</span> <span class="variable">debuglog</span> (<span class="variable">msg</span>) {
  <span class="keyword">if</span> (<span class="variable">exports</span>.<span class="variable">debug</span>) {
    <span class="variable">console</span>.<span class="variable">log</span>(<span class="string">'[sessionvoc] '</span> + <span class="variable">msg</span>);
  }
}</code></pre>
</td>
</tr>
<tr class="code">
<td class="docs">
<p>Helper function to create options for the http.request call.
 </p>
</td>
<td class="code">
<pre><code><span class="keyword">function</span> <span class="variable">svo</span> (<span class="variable">host</span>, <span class="variable">port</span>, <span class="variable">path</span>, <span class="variable">method</span>) {
  <span class="keyword">return</span> {
    <span class="variable">host</span>: <span class="variable">host</span>,
    <span class="variable">port</span>: <span class="variable">port</span>,
    <span class="variable">path</span>: <span class="variable">path</span>,
    <span class="variable">method</span>: <span class="variable">method</span>,
    <span class="variable">headers</span>: {
      <span class="string">'connection'</span>: <span class="string">'keep-alive'</span>,
    }
  };
}</code></pre>
</td>
</tr>
<tr class="code">
<td class="docs">
<p>Calls the SessionVOC.</p>

<p>This functions executes a request given by url with the body data. If the
request is successfull, then the function work is called. If an error occurs
the function next is called with the error is first argument.</p>

<h2></h2>

<ul><li><p><strong>param</strong>: <em>string</em>  url</p></li><li><p><strong>param</strong>: <em>Object</em>  data</p></li><li><p><strong>param</strong>: <em>Function</em>  callback</p></li><li><p><strong>param</strong>: <em>Function</em>  work</p></li></ul>
</td>
<td class="code">
<pre><code><span class="keyword">var</span> <span class="variable">sessionvocRequest</span> = <span class="keyword">function</span> (<span class="variable">url</span>, <span class="variable">data</span>, <span class="variable">next</span>, <span class="variable">work</span>) {
  <span class="variable">debuglog</span>(<span class="string">'sessionvocRequest: '</span> + <span class="class">JSON</span>.<span class="variable">stringify</span>(<span class="variable">url</span>));

  <span class="keyword">if</span> (<span class="variable">data</span>) {
    <span class="variable">url</span>.<span class="variable">headers</span>[<span class="string">'content-length'</span>] = <span class="variable">data</span>.<span class="variable">length</span>;
  }
  <span class="keyword">else</span> {
    <span class="variable">url</span>.<span class="variable">headers</span>[<span class="string">'content-length'</span>] = <span class="number integer">0</span>;
  }

  <span class="keyword">var</span> <span class="variable">req</span> = <span class="variable">http</span>.<span class="variable">request</span>(<span class="variable">url</span>, 
                         <span class="keyword">function</span> (<span class="variable">res</span>) {
                           <span class="keyword">var</span> <span class="variable">body</span> = <span class="string">''</span>;

                           <span class="variable">res</span>.<span class="variable">setEncoding</span>(<span class="string">'utf8'</span>);

                           <span class="variable">res</span>.<span class="variable">on</span>(<span class="string">'error'</span>,
                                  <span class="keyword">function</span> (<span class="variable">err</span>) {
                                    <span class="variable">debuglog</span>(<span class="string">'ERROR (http request): '</span> + <span class="class">JSON</span>.<span class="variable">stringify</span>(<span class="variable">err</span>));
                                    <span class="variable">next</span>(<span class="variable">err</span>);
                                  });

                           <span class="variable">res</span>.<span class="variable">on</span>(<span class="string">'data'</span>,
                                  <span class="keyword">function</span> (<span class="variable">chunk</span>) {
                                    <span class="variable">body</span> += <span class="variable">chunk</span>;
                                  });
  
                           <span class="variable">res</span>.<span class="variable">on</span>(<span class="string">'end'</span>, <span class="keyword">function</span> (<span class="variable">chunk</span>) {
                                    <span class="variable">debuglog</span>(<span class="string">'response: '</span> + <span class="variable">body</span>);
                                    <span class="variable">debuglog</span>(<span class="string">'status code: '</span> + <span class="variable">res</span>.<span class="variable">statusCode</span>);

                                    <span class="keyword">var</span> <span class="variable">data</span>;

                                    <span class="keyword">try</span> {
                                      <span class="variable">data</span> = <span class="class">JSON</span>.<span class="variable">parse</span>(<span class="variable">body</span>);
                                    }
                                    <span class="keyword">catch</span> (<span class="variable">err</span>) {
                                      <span class="variable">debuglog</span>(<span class="string">'ERROR (parsing body): '</span> + <span class="class">JSON</span>.<span class="variable">stringify</span>(<span class="variable">err</span>));
                                      <span class="variable">debuglog</span>(<span class="string">'body was: '</span> + <span class="variable">body</span>);
                                      <span class="variable">next</span>(<span class="variable">err</span>);
                                      <span class="keyword">return</span>;
                                    }

                                    <span class="keyword">try</span> {
                                      <span class="keyword">if</span> (<span class="variable">res</span>.<span class="variable">statusCode</span> == <span class="number integer">200</span>) {
                                        <span class="keyword">if</span> (<span class="variable">work</span>) {
                                          <span class="variable">work</span>(<span class="variable">data</span>);
                                        }
                                        <span class="keyword">else</span> {
                                          <span class="variable">next</span>(<span class="keyword">null</span>, <span class="variable">data</span>);
                                        }
                                      }
                                      <span class="keyword">else</span> {
                                        <span class="variable">next</span>(<span class="variable">data</span>);
                                      }
                                    }
                                    <span class="keyword">catch</span> (<span class="variable">err</span>) {
                                      <span class="variable">debuglog</span>(<span class="string">'ERROR (callback): '</span> + <span class="class">JSON</span>.<span class="variable">stringify</span>(<span class="variable">err</span>));
                                      <span class="variable">next</span>(<span class="variable">err</span>);
                                      <span class="keyword">return</span>;
                                    }
                                  });
                         });

  <span class="variable">req</span>.<span class="variable">on</span>(<span class="string">'error'</span>,
         <span class="keyword">function</span> (<span class="variable">err</span>) {
           <span class="variable">debuglog</span>(<span class="string">'ERROR (connect): '</span> + <span class="class">JSON</span>.<span class="variable">stringify</span>(<span class="variable">err</span>));
           <span class="variable">next</span>(<span class="variable">err</span>);
         });

  <span class="keyword">if</span> (<span class="variable">data</span>) {
    <span class="variable">debuglog</span>(<span class="string">'sessionvocRequest body: '</span> + <span class="class">JSON</span>.<span class="variable">stringify</span>(<span class="variable">data</span>));
    <span class="variable">req</span>.<span class="variable">write</span>(<span class="variable">data</span>);
  }

  <span class="variable">req</span>.<span class="variable">end</span>();
};</code></pre>
</td>
</tr>
<tr class="code">
<td class="docs">
<p>load the session datainfo
 </p>
</td>
<td class="code">
<pre><code><span class="keyword">function</span> <span class="variable">loadInformation</span> (<span class="variable">store</span>, <span class="variable">next</span>) {
  <span class="variable">debuglog</span>(<span class="string">'loadInformation('</span> + <span class="variable">store</span>.<span class="variable">host</span> + <span class="string">', '</span> + <span class="variable">store</span>.<span class="variable">port</span> + <span class="string">')'</span>);

  <span class="variable">sessionvocRequest</span>(<span class="variable">svo</span>(<span class="variable">store</span>.<span class="variable">host</span>, <span class="variable">store</span>.<span class="variable">port</span>, <span class="string">'/datainfo'</span>, <span class="string">'GET'</span>), <span class="keyword">null</span>, <span class="variable">next</span>,
                    <span class="keyword">function</span> (<span class="variable">data</span>) {
                      <span class="variable">store</span>.<span class="variable">datainfo</span> = <span class="variable">data</span>;
                      <span class="variable">next</span>();
                    });
};</code></pre>
</td>
</tr>
<tr class="code">
<td class="docs">
<p>check if we need to load the session datainfo
 </p>
</td>
<td class="code">
<pre><code><span class="keyword">function</span> <span class="variable">checkDatainfo</span> (<span class="variable">store</span>, <span class="variable">next</span>, <span class="variable">work</span>) {

  <span class="keyword">if</span> (<span class="variable">store</span>.<span class="variable">datainfo</span>) {
    <span class="variable">work</span>();
  }
  <span class="keyword">else</span> {
    <span class="variable">debuglog</span>(<span class="string">'checkDatainfo: datainfo must be loaded'</span>);
    <span class="variable">loadInformation</span>(<span class="variable">store</span>,
                    <span class="keyword">function</span> (<span class="variable">err</span>) {
                      <span class="variable">err</span> ? <span class="variable">next</span>(<span class="variable">err</span>) : <span class="variable">work</span>();
                    });
  }
};
</code></pre>
</td>
</tr>	</body>
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