fast-xml-parser
Version:
Validate XML or Parse XML to JS/JSON very fast without C/C++ based libraries
1,122 lines (957 loc) • 34.2 kB
HTML
<html><head><meta charset="utf-8"><style>body {
max-width: 980px;
border: 1px solid #ddd;
outline: 1300px solid #fff;
margin: 16px auto;
}
body .markdown-body
{
padding: 45px;
}
@font-face {
font-family: fontawesome-mini;
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}
@font-face {
font-family: octicons-anchor;
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.markdown-body {
font-family: sans-serif;
-ms-text-size-adjust: 100%;
-webkit-text-size-adjust: 100%;
color: #333333;
overflow: hidden;
font-family: "Helvetica Neue", Helvetica, "Segoe UI", Arial, freesans, sans-serif;
font-size: 16px;
line-height: 1.6;
word-wrap: break-word;
}
.markdown-body a {
background: transparent;
}
.markdown-body a:active,
.markdown-body a:hover {
outline: 0;
}
.markdown-body b,
.markdown-body strong {
font-weight: bold;
}
.markdown-body mark {
background: #ff0;
color: #000;
font-style: italic;
font-weight: bold;
}
.markdown-body sub,
.markdown-body sup {
font-size: 75%;
line-height: 0;
position: relative;
vertical-align: baseline;
}
.markdown-body sup {
top: -0.5em;
}
.markdown-body sub {
bottom: -0.25em;
}
.markdown-body h1 {
font-size: 2em;
margin: 0.67em 0;
}
.markdown-body img {
border: 0;
}
.markdown-body hr {
-moz-box-sizing: content-box;
box-sizing: content-box;
height: 0;
}
.markdown-body pre {
overflow: auto;
}
.markdown-body code,
.markdown-body kbd,
.markdown-body pre,
.markdown-body samp {
font-family: monospace, monospace;
font-size: 1em;
}
.markdown-body input {
color: inherit;
font: inherit;
margin: 0;
}
.markdown-body html input[disabled] {
cursor: default;
}
.markdown-body input {
line-height: normal;
}
.markdown-body input[type="checkbox"] {
box-sizing: border-box;
padding: 0;
}
.markdown-body table {
border-collapse: collapse;
border-spacing: 0;
}
.markdown-body td,
.markdown-body th {
padding: 0;
}
.markdown-body .codehilitetable {
border: 0;
border-spacing: 0;
}
.markdown-body .codehilitetable tr {
border: 0;
}
.markdown-body .codehilitetable pre,
.markdown-body .codehilitetable div.codehilite {
margin: 0;
}
.markdown-body .linenos,
.markdown-body .code,
.markdown-body .codehilitetable td {
border: 0;
padding: 0;
}
.markdown-body td:not(.linenos) .linenodiv {
padding: 0 ;
}
.markdown-body .code {
width: 100%;
}
.markdown-body .linenos div pre,
.markdown-body .linenodiv pre,
.markdown-body .linenodiv {
border: 0;
-webkit-border-radius: 0;
-moz-border-radius: 0;
border-radius: 0;
-webkit-border-top-left-radius: 3px;
-webkit-border-bottom-left-radius: 3px;
-moz-border-radius-topleft: 3px;
-moz-border-radius-bottomleft: 3px;
border-top-left-radius: 3px;
border-bottom-left-radius: 3px;
}
.markdown-body .code div pre,
.markdown-body .code div {
border: 0;
-webkit-border-radius: 0;
-moz-border-radius: 0;
border-radius: 0;
-webkit-border-top-right-radius: 3px;
-webkit-border-bottom-right-radius: 3px;
-moz-border-radius-topright: 3px;
-moz-border-radius-bottomright: 3px;
border-top-right-radius: 3px;
border-bottom-right-radius: 3px;
}
.markdown-body * {
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.markdown-body input {
font: 13px Helvetica, arial, freesans, clean, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
line-height: 1.4;
}
.markdown-body a {
color: #4183c4;
text-decoration: none;
}
.markdown-body a:hover,
.markdown-body a:focus,
.markdown-body a:active {
text-decoration: underline;
}
.markdown-body hr {
height: 0;
margin: 15px 0;
overflow: hidden;
background: transparent;
border: 0;
border-bottom: 1px solid #ddd;
}
.markdown-body hr:before,
.markdown-body hr:after {
display: table;
content: " ";
}
.markdown-body hr:after {
clear: both;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
margin-top: 15px;
margin-bottom: 15px;
line-height: 1.1;
}
.markdown-body h1 {
font-size: 30px;
}
.markdown-body h2 {
font-size: 21px;
}
.markdown-body h3 {
font-size: 16px;
}
.markdown-body h4 {
font-size: 14px;
}
.markdown-body h5 {
font-size: 12px;
}
.markdown-body h6 {
font-size: 11px;
}
.markdown-body blockquote {
margin: 0;
}
.markdown-body ul,
.markdown-body ol {
padding: 0;
margin-top: 0;
margin-bottom: 0;
}
.markdown-body ol ol,
.markdown-body ul ol {
list-style-type: lower-roman;
}
.markdown-body ul ul ol,
.markdown-body ul ol ol,
.markdown-body ol ul ol,
.markdown-body ol ol ol {
list-style-type: lower-alpha;
}
.markdown-body dd {
margin-left: 0;
}
.markdown-body code,
.markdown-body pre,
.markdown-body samp {
font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
font-size: 12px;
}
.markdown-body pre {
margin-top: 0;
margin-bottom: 0;
}
.markdown-body kbd {
background-color: #e7e7e7;
background-image: -moz-linear-gradient(#fefefe, #e7e7e7);
background-image: -webkit-linear-gradient(#fefefe, #e7e7e7);
background-image: linear-gradient(#fefefe, #e7e7e7);
background-repeat: repeat-x;
border-radius: 2px;
border: 1px solid #cfcfcf;
color: #000;
padding: 3px 5px;
line-height: 10px;
font: 11px Consolas, "Liberation Mono", Menlo, Courier, monospace;
display: inline-block;
}
.markdown-body>*:first-child {
margin-top: 0 ;
}
.markdown-body>*:last-child {
margin-bottom: 0 ;
}
.markdown-body .headeranchor-link {
position: absolute;
top: 0;
bottom: 0;
left: 0;
display: block;
padding-right: 6px;
padding-left: 30px;
margin-left: -30px;
}
.markdown-body .headeranchor-link:focus {
outline: none;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
position: relative;
margin-top: 1em;
margin-bottom: 16px;
font-weight: bold;
line-height: 1.4;
}
.markdown-body h1 .headeranchor,
.markdown-body h2 .headeranchor,
.markdown-body h3 .headeranchor,
.markdown-body h4 .headeranchor,
.markdown-body h5 .headeranchor,
.markdown-body h6 .headeranchor {
display: none;
color: #000;
vertical-align: middle;
}
.markdown-body h1:hover .headeranchor-link,
.markdown-body h2:hover .headeranchor-link,
.markdown-body h3:hover .headeranchor-link,
.markdown-body h4:hover .headeranchor-link,
.markdown-body h5:hover .headeranchor-link,
.markdown-body h6:hover .headeranchor-link {
height: 1em;
padding-left: 8px;
margin-left: -30px;
line-height: 1;
text-decoration: none;
}
.markdown-body h1:hover .headeranchor-link .headeranchor,
.markdown-body h2:hover .headeranchor-link .headeranchor,
.markdown-body h3:hover .headeranchor-link .headeranchor,
.markdown-body h4:hover .headeranchor-link .headeranchor,
.markdown-body h5:hover .headeranchor-link .headeranchor,
.markdown-body h6:hover .headeranchor-link .headeranchor {
display: inline-block;
}
.markdown-body h1 {
padding-bottom: 0.3em;
font-size: 2.25em;
line-height: 1.2;
border-bottom: 1px solid #eee;
}
.markdown-body h2 {
padding-bottom: 0.3em;
font-size: 1.75em;
line-height: 1.225;
border-bottom: 1px solid #eee;
}
.markdown-body h3 {
font-size: 1.5em;
line-height: 1.43;
}
.markdown-body h4 {
font-size: 1.25em;
}
.markdown-body h5 {
font-size: 1em;
}
.markdown-body h6 {
font-size: 1em;
color: #777;
}
.markdown-body p,
.markdown-body blockquote,
.markdown-body ul,
.markdown-body ol,
.markdown-body dl,
.markdown-body table,
.markdown-body pre,
.markdown-body .admonition {
margin-top: 0;
margin-bottom: 16px;
}
.markdown-body hr {
height: 4px;
padding: 0;
margin: 16px 0;
background-color: #e7e7e7;
border: 0 none;
}
.markdown-body ul,
.markdown-body ol {
padding-left: 2em;
}
.markdown-body ul ul,
.markdown-body ul ol,
.markdown-body ol ol,
.markdown-body ol ul {
margin-top: 0;
margin-bottom: 0;
}
.markdown-body li>p {
margin-top: 16px;
}
.markdown-body dl {
padding: 0;
}
.markdown-body dl dt {
padding: 0;
margin-top: 16px;
font-size: 1em;
font-style: italic;
font-weight: bold;
}
.markdown-body dl dd {
padding: 0 16px;
margin-bottom: 16px;
}
.markdown-body blockquote {
padding: 0 15px;
color: #777;
border-left: 4px solid #ddd;
}
.markdown-body blockquote>:first-child {
margin-top: 0;
}
.markdown-body blockquote>:last-child {
margin-bottom: 0;
}
.markdown-body table {
display: block;
width: 100%;
overflow: auto;
word-break: normal;
word-break: keep-all;
}
.markdown-body table th {
font-weight: bold;
}
.markdown-body table th,
.markdown-body table td {
padding: 6px 13px;
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</style><title>README</title></head><body><article class="markdown-body"><h1 id="fast-xml-parser"><a href="https://www.npmjs.com/package/fast-xml-parser">fast-xml-parser</a></h1>
<p>Validate XML or Parse XML to JS/JSON very fast without C/C++ based libraries and no callback</p>
<p>You can use this library online (press try me button above), or as command from CLI, or in your website, or in npm repo.</p>
<ul>
<li>This library let you validate the XML data syntactically. </li>
<li>Or you can transform/covert/parse XML data to JS/JSON object.</li>
<li>Or you can transform the XML in traversable JS object which can later be converted to JS/JSON object.</li>
</ul>
<p><a href="https://codeclimate.com/github/NaturalIntelligence/fast-xml-parser"><img alt="Code Climate" src="https://codeclimate.com/github/NaturalIntelligence/fast-xml-parser/badges/gpa.svg" /></a> <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=KQJAX48SPUKNC"><img src="https://www.paypalobjects.com/webstatic/en_US/btn/btn_donate_92x26.png" alt="Stubmatic donate button"/></a> <a href="https://liberapay.com/amitgupta/donate"><img alt="Donate using Liberapay" src="https://liberapay.com/assets/widgets/donate.svg"></a> <a href="https://snyk.io/test/github/naturalintelligence/fast-xml-parser"><img alt="Known Vulnerabilities" src="https://snyk.io/test/github/naturalintelligence/fast-xml-parser/badge.svg" /></a> <a href="https://travis-ci.org/NaturalIntelligence/fast-xml-parser"><img alt="Travis ci Build Status" src="https://travis-ci.org/NaturalIntelligence/fast-xml-parser.svg?branch=master" /></a> <a href="https://coveralls.io/github/NaturalIntelligence/fast-xml-parser?branch=master"><img alt="Coverage Status" src="https://coveralls.io/repos/github/NaturalIntelligence/fast-xml-parser/badge.svg?branch=master" /></a> <a href="https://naturalintelligence.github.io/fast-xml-parser/"><img src="https://img.shields.io/badge/Try-me-blue.svg?colorA=FFA500&colorB=0000FF" alt="Try me"/></a><br />
<a href="https://www.bithound.io/github/NaturalIntelligence/fast-xml-parser/master/dependencies/npm"><img alt="bitHound Dev Dependencies" src="https://www.bithound.io/github/NaturalIntelligence/fast-xml-parser/badges/devDependencies.svg" /></a><br />
<a href="https://www.bithound.io/github/NaturalIntelligence/fast-xml-parser"><img alt="bitHound Overall Score" src="https://www.bithound.io/github/NaturalIntelligence/fast-xml-parser/badges/score.svg" /></a> <a href="https://npm.im/fast-xml-parser"><img alt="NPM total downloads" src="https://img.shields.io/npm/dt/fast-xml-parser.svg" /></a></p>
<p><a href="https://opencollective.com/fast-xml-parser/donate" target="_blank"><br />
<img src="https://opencollective.com/fast-xml-parser/donate/button@2x.png?color=blue" width=300 /><br />
</a></p>
<h3 id="how-to-use"><a name="user-content-how-to-use" href="#how-to-use" class="headeranchor-link" aria-hidden="true"><span class="headeranchor"></span></a>How to use</h3>
<p><strong>Installation</strong></p>
<p><code>$npm install fast-xml-parser</code></p>
<p>or using <a href="https://yarnpkg.com/">yarn</a></p>
<p><code>$yarn add fast-xml-parser</code></p>
<p><strong>Usage</strong><br />
<pre><code class="js">var fastXmlParser = require('fast-xml-parser');
var jsonObj = fastXmlParser.parse(xmlData);
// when a tag has attributes
var options = {
attrPrefix : "@_",
attrNodeName: false,
textNodeName : "#text",
ignoreNonTextNodeAttr : true,
ignoreTextNodeAttr : true,
ignoreNameSpace : true,
ignoreRootElement : false,
textNodeConversion : true,
textAttrConversion : false,
arrayMode : false
};
if(fastXmlParser.validate(xmlData)=== true){//optional
var jsonObj = fastXmlParser.parse(xmlData,options);
}
//Intermediate obj
var tObj = fastXmlParser.getTraversalObj(xmlData,options);
var jsonObj = fastXmlParser.convertToJson(tObj);
</code></pre></p>
<dl>
<dt><strong>attrNodeName</strong>: (Valid name) Group all the attributes as properties of given name.</dt>
<dt><strong>ignoreNonTextNodeAttr</strong></dt>
<dt>ignoreTextNodeAttr</dt>
<dt>ignoreNameSpace</dt>
<dt>ignoreRootElement</dt>
<dt>textNodeConversion</dt>
<dd>Remove namespace from tag and attribute names. <br />
Remove root element from parsed JSON. <br />
Parse the value of text node to float or integer.<br />
Parse the value of an attribute to float or integer.<br />
Put the value(s) of a tag or attribute in an array. </dd>
</dl>
<p>To use from command line<br />
<pre><code class="bash">$xml2js [-ns|-a|-c] <filename> [-o outputfile.json]
$cat xmlfile.xml | xml2js [-ns|-a|-c] [-o outputfile.json]
</code></pre></p>
<p>-ns : To include namespaces (bedefault ignored)<br />
-a : To ignore attributes<br />
-c : To ignore value conversion (i.e. “-3” will not be converted to number -3)</p>
<p>To use it <strong>on webpage</strong></p>
<ol>
<li>Download and include <a href="https://github.com/NaturalIntelligence/fast-xml-parser/blob/master/lib/parser.js">parser.js</a><br />
<pre><code class="js">var isValid = parser.validate(xmlData);
var jsonObj = parser.parse(xmlData);
</code></pre></li>
</ol>
<h2 id="comparision"><a name="user-content-comparision" href="#comparision" class="headeranchor-link" aria-hidden="true"><span class="headeranchor"></span></a>Comparision</h2>
<p>I decided to created this library when I couldn’t find any library which can convert XML data to json without any callback and which is not based on any C/C++ library.</p>
<p>Libraries that I compared<br />
<em> xml-mapping : fast, result is not satisfactory<br />
</em> xml2js : fast, result is not satisfactory<br />
<em> xml2js-expat : couldn’t test performance as it gives error on high load. Installation failed on travis and on my local machine using ‘yarn’.<br />
</em> xml2json : based on node-expat which is based on C/C++. Installation failed on travis.<br />
* fast-xml-parser : very very fast.</p>
<p>Why not C/C++ based libraries?<br />
Installation of such libraries fails on some OS. You may require to install missing dependency manually.</p>
<h3 id="benchmark-report"><a name="user-content-benchmark-report" href="#benchmark-report" class="headeranchor-link" aria-hidden="true"><span class="headeranchor"></span></a>Benchmark report</h3>
<p><img alt="npm_xml2json_compare" src="https://cloud.githubusercontent.com/assets/7692328/22402086/7526a3a6-e5e2-11e6-8e6b-301691725c21.png" /></p>
<p>Don’t forget to check the performance report on <a href="https://naturalintelligence.github.io/comparejs/?q=xml2json">comparejs</a>.</p>
<p><strong>validator benchmark: 21000 tps</strong></p>
<h3 id="limitation"><a name="user-content-limitation" href="#limitation" class="headeranchor-link" aria-hidden="true"><span class="headeranchor"></span></a>Limitation</h3>
<ul>
<li>Parser doesn’t check if the XML is valid or not. If the XML is not valid you may get invalid result. So you can call the validator function first to check the structure.</li>
<li>This is based on JS regular expression engine. So due to it’s limitation fast-xml-parser face performance issue when it process XML string(data) which is very large like 10mb or more. (I’ll look into this as soon as I get some free time). <strong>UPDATE</strong>: from v2.9.0, I have rewritten the validator code. So that validator can handle large files as well. I have tested it up to 98mb xml file. I have some more ideas to increase the speed. And I’ll work whenever I get the time.</li>
</ul>
<p>Report an issue or request for a feature <a href="https://github.com/NaturalIntelligence/fast-xml-parser/issues">here</a></p>
<p>Your contribution in terms of donation, testing, bug fixes, code development etc. can help me to write fast algorithms.<br />
<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=KQJAX48SPUKNC"><img src="https://www.paypalobjects.com/webstatic/en_US/btn/btn_donate_92x26.png" alt="Stubmatic donate button"/></a> </p>
<p><strong>Give me a <a href="https://github.com/NaturalIntelligence/fast-xml-parser">star</a></strong>, if you really like this project.</p>
<p><strong>Fund collected (since the starting of the project)</strong> : $0</p>
<p>Some of my other NPM pojects<br />
- <a href="https://github.com/NaturalIntelligence/Stubmatic">stubmatic</a> : A stub server to mock behaviour of HTTP(s) / REST / SOAP services. Stubbing redis is on the way.<br />
- <a href="https://github.com/NaturalIntelligence/comparejs">compare js</a> : compare the features of JS code, libraries, and NPM repos.<br />
- <a href="https://github.com/amitguptagwl/fast-lorem-ipsum">fast-lorem-ipsum</a> : Generate lorem ipsum words, sentences, paragraph very quickly.</p>
<h3 id="todo"><a name="user-content-todo" href="#todo" class="headeranchor-link" aria-hidden="true"><span class="headeranchor"></span></a>TODO</h3>
<ul>
<li>P2: parser online demo with more options</li>
<li>P2: validator cli</li>
<li>P2: fast XML prettyfier</li>
</ul></article></body></html>