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<!doctype html>
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<meta charset="utf-8">
<title>README</title>
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</head>
<body class="body">
<div id="toc" style="min-width: 5em;">
<ol>
<li>
<a href="#1-about" raw="# 1 About" lo="32">
<span class="toctext">About</span>
</a>
</li>
<li>
<a href="#2-installation" raw="# 2 Installation" lo="56" class="">
<span class="toctext">Installation</span>
</a>
</li>
<li>
<a href="#3-examples" raw="# 3 Examples" lo="67">
<span class="toctext">Examples</span>
</a>
<ol class="toc" style="display: none;">
<li>
<a href="#31-list-of-examples" raw="## 3.1 List of Examples" lo="69">
<span class="toctext">List of Examples</span>
</a>
</li>
<li>
<a href="#32-serve-data-from-a-minimal-python-program" raw="## 3.2 Serve data from a minimal Python program" lo="97">
<span class="toctext">Serve data from a minimal Python program</span>
</a>
</li>
<li>
<a href="#33-serve-data-from-an-enhanced-python-program" raw="## 3.3 Serve data from an enhanced Python program" lo="121">
<span class="toctext">Serve data from an enhanced Python program</span>
</a>
</li>
<li>
<a href="#34-serve-data-from-a-non-hapi-web-service" raw="## 3.4 Serve data from a non-HAPI web service" lo="151">
<span class="toctext">Serve data from a non-HAPI web service</span>
</a>
</li>
<li>
<a href="#35-serve-data-stored-in-a-single-file" raw="## 3.5 Serve data stored in a single file" lo="163" class="">
<span class="toctext">Serve data stored in a single file</span>
</a>
</li>
<li>
<a href="#36-serve-data-read-by-autoplot" raw="## 3.6 Serve data read by Autoplot" lo="175">
<span class="toctext">Serve data read by Autoplot</span>
</a>
</li>
</ol>
</li>
<li>
<a href="#4-usage" raw="# 4 Usage" lo="207">
<span class="toctext">Usage</span>
</a>
</li>
<li>
<a href="#5-server-configuration" raw="# 5 Server Configuration" lo="308">
<span class="toctext">Server Configuration</span>
</a>
<ol class="toc" style="display: none;">
<li>
<a href="#51-conf-config.json" raw="## 5.1 conf/config.json" lo="310">
<span class="toctext">conf/config.json</span>
</a>
</li>
<li>
<a href="#52-apache" raw="## 5.2 Apache" lo="358">
<span class="toctext">Apache</span>
</a>
</li>
<li>
<a href="#53-nginx" raw="## 5.3 Nginx" lo="378">
<span class="toctext">Nginx</span>
</a>
</li>
</ol>
</li>
<li>
<a href="#6-metadata" raw="# 6 Metadata" lo="393">
<span class="toctext">Metadata</span>
</a>
<ol class="toc" style="display: none;">
<li>
<a href="#61-server" raw="## 6.1 server" lo="469">
<span class="toctext">server</span>
</a>
<ol class="toc" style="display: none;">
<li>
<a href="#611-id-and-prefix" raw="### 6.1.1 `id` and `prefix`" lo="486">
<span class="toctext"><code type="md">id</code> and <code type="md">prefix</code></span>
</a>
</li>
<li>
<a href="#612-contact" raw="### 6.1.2 `contact`" lo="504">
<span class="toctext"><code type="md">contact</code></span>
</a>
</li>
<li>
<a href="#613-landingfile-and-landingpath" raw="### 6.1.3 `landingFile` and `landingPath`" lo="508">
<span class="toctext"><code type="md">landingFile</code> and <code type="md">landingPath</code></span>
</a>
</li>
<li>
<a href="#614-catalog-update" raw="### 6.1.4 `catalog-update`" lo="536">
<span class="toctext"><code type="md">catalog-update</code></span>
</a>
</li>
</ol>
</li>
<li>
<a href="#62-catalog" raw="## 6.2 catalog" lo="540">
<span class="toctext">catalog</span>
</a>
<ol class="toc" style="display: none;">
<li>
<a href="#621-catalog_inline" raw="### 6.2.1 `catalog_inline`" lo="544">
<span class="toctext"><code type="md">catalog_inline</code></span>
</a>
</li>
<li>
<a href="#622-catalog_file" raw="### 6.2.2 `catalog_file`" lo="607">
<span class="toctext"><code type="md">catalog_file</code></span>
</a>
</li>
<li>
<a href="#623-catalog_url" raw="### 6.2.3 `catalog_url`" lo="612">
<span class="toctext"><code type="md">catalog_url</code></span>
</a>
</li>
<li>
<a href="#624-catalog_command" raw="### 6.2.4 `catalog_command`" lo="616">
<span class="toctext"><code type="md">catalog_command</code></span>
</a>
</li>
</ol>
</li>
</ol>
</li>
<li>
<a href="#7-development" raw="# 7 Development" lo="621">
<span class="toctext">Development</span>
</a>
</li>
<li>
<a href="#8-contact" raw="# 8 Contact" lo="650">
<span class="toctext">Contact</span>
</a>
</li>
</ol>
</div>
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<div class="section">
<div class="block">
<div class="comment" lo="1" lf="1">
<!-- TOC -->
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<p padlength="0" lo="2" lf="28"><a href="#1-about">1 About</a><br>
<a href="#2-installation">2 Installation</a><br>
<a href="#3-examples">3 Examples</a><br> <a href="#31-list-of-examples">3.1 List of Examples</a><br> <a href="#32-serve-data-from-a-minimal-python-program">3.2 Serve data from a minimal Python program</a><br> <a href="#33-serve-data-from-an-enhanced-python-program">3.3 Serve data from an enhanced Python program</a><br> <a href="#34-serve-data-from-a-non-hapi-web-service">3.4 Serve data from a non-HAPI web service</a><br> <a href="#35-serve-data-stored-in-a-single-file">3.5 Serve data stored in a single file</a><br> <a href="#36-serve-data-read-by-autoplot">3.6 Serve data read by Autoplot</a><br>
<a href="#4-usage">4 Usage</a><br>
<a href="#5-server-configuration">5 Server Configuration</a><br> <a href="#51-conf-config.json">5.1 conf/config.json</a><br> <a href="#52-apache">5.2 Apache</a><br> <a href="#53-nginx">5.3 Nginx</a><br>
<a href="#6-metadata">6 Metadata</a><br> <a href="#61-server">6.1 server</a><br> <a href="#611-id-and-prefix">6.1.1 id and prefix</a><br> <a href="#612-contact">6.1.2 contact</a><br> <a href="#613-landingfile-and-landingpath">6.1.3 landingFile and landingPath</a><br> <a href="#614-catalog-update">6.1.4 catalog-update</a><br> <a href="#62-catalog">6.2 catalog</a><br> <a href="#621-catalog_inline">6.2.1 catalog_inline</a><br> <a href="#622-catalog_file">6.2.2 catalog_file</a><br> <a href="#623-catalog_url">6.2.3 catalog_url</a><br> <a href="#624-catalog_command">6.2.4 catalog_command</a><br>
<a href="#7-development">7 Development</a><br>
<a href="#8-contact">8 Contact</a>
</p>
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<div class="block">
<p padlength="0" lo="31" lf="31"><a name="About"></a></p>
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<div class="section">
<div class="block">
<h1 lo="32" lf="32"><a name="1-about" number="1" lo="32" raw="# 1 About" class="anchor hanchor" href="#1-about"><span class="hnumber">1</span> <span class="htext">About</span></a></h1>
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<div class="block">
<p padlength="0" lo="34" lf="34">The intended user for this server-side software is a data provider that wants to serve data through a <a href="https://github.com/hapi-server/data-specification">HAPI API</a>. To be able to serve data from a HAPI API from their server using this software, the data provider only needs</p>
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<li markerlength="3" padlength="0" lo="36" lf="36">
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<p padlength="0" lo="36" lf="36"><a href="https://github.com/hapi-server/data-specification">HAPI</a> metadata, in one of a <a href="#Metadata">variety of forms</a>, for a collection of datasets and</p>
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<li markerlength="3" padlength="0" lo="37" lf="39">
<div class="block">
<p padlength="0" lo="37" lf="37">a command-line program that returns at least a <a href="https://github.com/hapi-server/data-specification/blob/master/hapi-dev/HAPI-data-access-spec-dev.md#data-stream-content">headerless HAPI CSV stream</a> for all parameters in the dataset over the full time range of available data. Optionally, the command line program can take inputs of a start and stop time, a list of one or more parameters to output, and a HAPI stream format.</p>
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<div class="block">
<p padlength="0" lo="39" lf="39">This software handles</p>
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<li markerlength="3" padlength="0" lo="41" lf="41">
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<p padlength="0" lo="41" lf="41">HAPI metadata validation,</p>
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<li markerlength="3" padlength="0" lo="42" lf="42">
<div class="block">
<p padlength="0" lo="42" lf="42">request validation and error responses,</p>
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<li markerlength="3" padlength="0" lo="43" lf="43">
<div class="block">
<p padlength="0" lo="43" lf="43">logging and alerts,</p>
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<div class="block">
<p padlength="0" lo="44" lf="44">time and parameter sub-setting (as needed), and</p>
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<li markerlength="3" padlength="0" lo="45" lf="47">
<div class="block">
<p padlength="0" lo="45" lf="45">generation of <a href="https://github.com/hapi-server/data-specification/blob/master/hapi-dev/HAPI-data-access-spec-dev.md#data-stream-content">HAPI JSON</a> or <a href="https://github.com/hapi-server/data-specification/blob/master/hapi-dev/HAPI-data-access-spec-dev.md#data-stream-content">HAPI binary</a> (as needed).</p>
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</div>
</li>
</ol>
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<div class="block">
<p padlength="0" lo="47" lf="47">Other features:</p>
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</div>
<div class="block">
<ol lo="49" lf="51" class="compact">
<li markerlength="3" padlength="0" lo="49" lf="49">
<div class="block">
<p padlength="0" lo="49" lf="49">Backpressure is handled by pausing command-line data generator <code type="md">stdout</code>. The server requires only 100 MB of memory.</p>
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<li markerlength="3" padlength="0" lo="50" lf="50">
<div class="block">
<p padlength="0" lo="50" lf="50">Unit tests – tests on the command line program and HAPI URLs can be specified in a configuration file. By default, the server will not start if any test fails.</p>
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<li markerlength="3" padlength="0" lo="51" lf="53">
<div class="block">
<p padlength="0" lo="51" lf="51">Coupling to the the <a href="https://github.com/hapi-server/server-ui"><code type="md">server-ui</code> client</a>.</p>
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</li>
</ol>
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</div>
<div class="block">
<div class="comment" lo="53" lf="53">%A list of catalogs that are served using this software is given at <a href="%5Bhttp://hapi-server.org/servers%5D">http://hapi-server.org/servers</a>.</div>
</div>
<div class="block">
<p padlength="0" lo="55" lf="55"><a name="Installation"></a></p>
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</div>
<div class="section">
<div class="block">
<h1 lo="56" lf="56" class=""><a name="2-installation" number="2" lo="56" raw="# 2 Installation" class="anchor hanchor" href="#2-installation"><span class="hnumber">2</span> <span class="htext">Installation</span></a></h1>
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</div>
<div class="block">
<p padlength="0" lo="58" lf="58">Requires <a href="https://nodejs.org/">NodeJS v16+</a>.</p>
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</div>
<div class="block">
<pre lo="60" lf="64" class=""><div class="block"><code lo="61" class="">git clone https://github.com/hapi-server/server-nodejs.git && cd server-nodejs</code></div><div class="block"><code lo="62" class="">npm install; npm update;</code></div><div class="block"><code lo="63" class="">node server.js</code></div></pre>
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</div>
<div class="block">
<p padlength="0" lo="66" lf="66" class="">This server is tested on Linux and OS-X.</p>
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</div>
<div class="block">
<p padlength="0" lo="68" lf="68" class=""><a name="Examples"></a></p>
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</div>
<div class="section">
<div class="block">
<h1 lo="69" lf="69"><a name="3-examples" number="3" lo="69" raw="# 3 Examples" class="anchor hanchor" href="#3-examples" lf="69"><span class="hnumber">3</span> <span class="htext">Examples</span></a></h1>
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</div>
</div>
<div class="section">
<div class="block">
<h2 lo="71" lf="71"><a name="31-list-of-examples" number="3.1" lo="71" raw="## 3.1 List of Examples" class="anchor hanchor" href="#31-list-of-examples" lf="71"><span class="hnumber">3.1</span> <span class="htext">List of Examples</span></a></h2>
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</div>
<div class="block">
<p padlength="0" lo="73" lf="73">The following examples are included in the <a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/">metadata</a> directory. The examples can be run using</p>
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</div>
<div class="block">
<pre lo="75" lf="77">./hapi-server -f metadata/FILENAME.json</pre>
<div class="block-info" style="display: none;"><span class="line-numbers">75-77</span></div>
</div>
<div class="block">
<p padlength="0" lo="79" lf="79">where <code type="md">FILENAME.json</code> is one of the file names listed below (e.g., <code type="md">Example0.json</code>).</p>
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<ul lo="81" lf="97" class="compact">
<li markerlength="2" padlength="0" lo="81" lf="81">
<div class="block">
<p padlength="0" lo="81" lf="81"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example0.json">Example0.json</a> - A Python program dumps an entire dataset in the headerless HAPI CSV format; the server handles time and parameter subsetting and creation of HAPI Binary and JSON.</p>
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<div class="block">
<p padlength="0" lo="82" lf="82"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example1.json">Example1.json</a> - Same as Example0 except the Python program handles time subsetting.</p>
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<div class="block">
<p padlength="0" lo="83" lf="83"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example2.json">Example2.json</a> - Same as Example1, except the Python program handles time and parameter subsetting and creation of HAPI CSV and Binary.</p>
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<div class="block">
<p padlength="0" lo="84" lf="84"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example3.json">Example3.json</a> - Same as Example2 except for HAPI info metadata for each dataset is stored in an external file.</p>
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<li markerlength="2" padlength="0" lo="85" lf="85">
<div class="block">
<p padlength="0" lo="85" lf="85"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example4.json">Example4.json</a> - Same as Example3 except for HAPI info metadata for each dataset is generated by a command-line command.</p>
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<div class="block">
<p padlength="0" lo="86" lf="86"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example5.json">Example5.json</a> - Same as Example4 except catalog metadata is stored in an external file.</p>
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<div class="block">
<p padlength="0" lo="87" lf="87"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example6.json">Example6.json</a> - Same as Example5 except catalog metadata is generated by a command-line command.</p>
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<div class="block">
<p padlength="0" lo="88" lf="88"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example7.json">Example7.json</a> - Pass-through example; Same as Example2 except that data is generated by remote request and catalog metadata is returned from a URL.</p>
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<div class="block">
<p padlength="0" lo="89" lf="89"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example8.json">Example8.json</a> - A dataset in headerless HAPI CSV format is stored in a single file; the server handles parameter and time subsetting and creation of HAPI JSON and Binary.</p>
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<div class="block">
<p padlength="0" lo="90" lf="90"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example9.json">Example9.json</a> - A URL returns a dataset in headerless HAPI CSV format; the server handles parameter and time subsetting and creation of HAPI JSON and Binary.</p>
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<div class="block">
<p padlength="0" lo="91" lf="91"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example10.json">Example10.json</a> - Same as Example9 except catalog is returned by a command.</p>
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<li markerlength="2" padlength="0" lo="92" lf="92">
<div class="block">
<p padlength="0" lo="92" lf="92"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/demos/AutoplotExample1.json">AutoplotExample1.json</a> - A dataset is stored in multiple files and AutoplotDataServer is used to subset in time.</p>
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<div class="block">
<p padlength="0" lo="93" lf="93"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/demos/AutoplotExample2.json">AutoplotExample2.json</a> - A dataset is stored in a CDF file, and AutoplotDataserver is used to generate HAPI CSV.</p>
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<div class="block">
<p padlength="0" lo="94" lf="94"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/TestData2.0.json">TestData2.0.json</a> - A test dataset used to test HAPI clients.</p>
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<div class="block">
<p padlength="0" lo="95" lf="95"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/TestData2.1.json">TestData2.1.json</a> - A test dataset used to test HAPI clients.</p>
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<div class="block">
<p padlength="0" lo="96" lf="96"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/SSCWeb.json">SSCWeb.json</a> - Data from a non-HAPI web service is made available from a HAPI server.</p>
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<div class="block">
<p padlength="0" lo="97" lf="97"><a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/QinDenton">QinDenton.json</a> - Data in a single ASCII file is converted to headerless HAPI CSV by a Python program. See section 2.5.</p>
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</ul>
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</div>
<div class="section">
<div class="block">
<h2 lo="99" lf="99"><a name="32-serve-data-from-a-minimal-python-program" number="3.2" lo="99" raw="## 3.2 Serve data from a minimal Python program" class="anchor hanchor" href="#32-serve-data-from-a-minimal-python-program" lf="99"><span class="hnumber">3.2</span> <span class="htext">Serve data from a minimal Python program</span></a></h2>
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</div>
<div class="block">
<p padlength="0" lo="101" lf="101">In this example, we assume that the command line program that returns a dataset has the minimal capabilities required - when executed, it generates a headerless HAPI CSV file with all parameters in the dataset over the entire time range of available data. The server handles time and parameter subsetting and the generation of HAPI Binary and JSON.</p>
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<div class="block">
<p padlength="0" lo="103" lf="103">The Python script <a href="https://github.com/hapi-server/server-nodejs/blob/master/bin/Example.py">Example.py</a> returns HAPI-formatted CSV data (with no header) with two parameters. Only a configuration file, <a href="https://github.com/hapi-server/server-nodejs/blob/master/metadata/Example0.json">Example0.json</a>, is needed to serve this data. The configuration file has information that is used to call the command line program, and it also has HAPI metadata that describes the output of <a href="https://raw.githubusercontent.com/hapi-server/server-nodejs/master/bin/Example.py">Example.py</a>. Details about the configuration file format are described in the <a href="#Metadata">Metadata</a> section.</p>
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