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<!doctype html>
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  <title>Query String | Node.js v4.8.2 Manual &amp; Documentation</title>
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<li><span class="stability_2"><a href="#querystring_query_string">Query String</a></span><ul>
<li><span class="stability_undefined"><a href="#querystring_querystring_escape">querystring.escape</a></span></li>
<li><span class="stability_undefined"><a href="#querystring_querystring_parse_str_sep_eq_options">querystring.parse(str[, sep][, eq][, options])</a></span></li>
<li><span class="stability_undefined"><a href="#querystring_querystring_stringify_obj_sep_eq_options">querystring.stringify(obj[, sep][, eq][, options])</a></span></li>
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      <div id="apicontent">
        <h1>Query String<span><a class="mark" href="#querystring_query_string" id="querystring_query_string">#</a></span></h1>
<pre class="api_stability api_stability_2">Stability: 2 - Stable</pre><!--name=querystring-->
<p>This module provides utilities for dealing with query strings.
It provides the following methods:</p>
<h2>querystring.escape<span><a class="mark" href="#querystring_querystring_escape" id="querystring_querystring_escape">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v0.1.25</span>
</div><p>The escape function used by <code>querystring.stringify</code>,
provided so that it could be overridden if necessary.</p>
<h2>querystring.parse(str[, sep][, eq][, options])<span><a class="mark" href="#querystring_querystring_parse_str_sep_eq_options" id="querystring_querystring_parse_str_sep_eq_options">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v0.1.25</span>
</div><p>Deserialize a query string to an object.
Optionally override the default separator (<code>&#39;&amp;&#39;</code>) and assignment (<code>&#39;=&#39;</code>)
characters.</p>
<p>Options object may contain <code>maxKeys</code> property (equal to 1000 by default), it&#39;ll
be used to limit processed keys. Set it to 0 to remove key count limitation.</p>
<p>Options object may contain <code>decodeURIComponent</code> property (<code>querystring.unescape</code> by default),
it can be used to decode a <code>non-utf8</code> encoding string if necessary.</p>
<p>Example:</p>
<pre><code class="lang-js">querystring.parse(&#39;foo=bar&amp;baz=qux&amp;baz=quux&amp;corge&#39;)
// returns { foo: &#39;bar&#39;, baz: [&#39;qux&#39;, &#39;quux&#39;], corge: &#39;&#39; }

// Suppose gbkDecodeURIComponent function already exists,
// it can decode `gbk` encoding string
querystring.parse(&#39;w=%D6%D0%CE%C4&amp;foo=bar&#39;, null, null,
  { decodeURIComponent: gbkDecodeURIComponent })
// returns { w: &#39;中文&#39;, foo: &#39;bar&#39; }
</code></pre>
<h2>querystring.stringify(obj[, sep][, eq][, options])<span><a class="mark" href="#querystring_querystring_stringify_obj_sep_eq_options" id="querystring_querystring_stringify_obj_sep_eq_options">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v0.1.25</span>
</div><p>Serialize an object to a query string.
Optionally override the default separator (<code>&#39;&amp;&#39;</code>) and assignment (<code>&#39;=&#39;</code>)
characters.</p>
<p>Options object may contain <code>encodeURIComponent</code> property (<code>querystring.escape</code> by default),
it can be used to encode string with <code>non-utf8</code> encoding if necessary.</p>
<p>Example:</p>
<pre><code class="lang-js">querystring.stringify({ foo: &#39;bar&#39;, baz: [&#39;qux&#39;, &#39;quux&#39;], corge: &#39;&#39; })
// returns &#39;foo=bar&amp;baz=qux&amp;baz=quux&amp;corge=&#39;

querystring.stringify({foo: &#39;bar&#39;, baz: &#39;qux&#39;}, &#39;;&#39;, &#39;:&#39;)
// returns &#39;foo:bar;baz:qux&#39;

// Suppose gbkEncodeURIComponent function already exists,
// it can encode string with `gbk` encoding
querystring.stringify({ w: &#39;中文&#39;, foo: &#39;bar&#39; }, null, null,
  { encodeURIComponent: gbkEncodeURIComponent })
// returns &#39;w=%D6%D0%CE%C4&amp;foo=bar&#39;
</code></pre>
<h2>querystring.unescape<span><a class="mark" href="#querystring_querystring_unescape" id="querystring_querystring_unescape">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v0.1.25</span>
</div><p>The unescape function used by <code>querystring.parse</code>,
provided so that it could be overridden if necessary.</p>
<p>It will try to use <code>decodeURIComponent</code> in the first place,
but if that fails it falls back to a safer equivalent that
doesn&#39;t throw on malformed URLs.</p>

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