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<title>libwebsockets: Urlencode and Urldecode</title>
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<div id="projectname">libwebsockets
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<div id="projectbrief">Lightweight C library for HTML5 websockets</div>
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<a href="#func-members">Functions</a> </div>
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<div class="title">Urlencode and Urldecode<div class="ingroups"><a class="el" href="group__http.html">HTTP</a></div></div> </div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:gabc2888476e50e001c875c1a8abf455b7"><td class="memItemLeft" align="right" valign="top">LWS_VISIBLE LWS_EXTERN const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__urlendec.html#gabc2888476e50e001c875c1a8abf455b7">lws_urlencode</a> (char *escaped, const char *string, int len)</td></tr>
<tr class="separator:gabc2888476e50e001c875c1a8abf455b7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaa373a9c16acdd96c395af61ab915ece3"><td class="memItemLeft" align="right" valign="top">LWS_VISIBLE LWS_EXTERN int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__urlendec.html#gaa373a9c16acdd96c395af61ab915ece3">lws_urldecode</a> (char *string, const char *escaped, int len)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<h2>HTML chunked Substitution</h2>
<p>APIs for receiving chunks of text, replacing a set of variable names via a callback, and then prepending and appending HTML chunked encoding headers. </p>
<h2 class="groupheader">Function Documentation</h2>
<a id="gaa373a9c16acdd96c395af61ab915ece3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaa373a9c16acdd96c395af61ab915ece3">§ </a></span>lws_urldecode()</h2>
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<td class="memname">LWS_VISIBLE LWS_EXTERN int lws_urldecode </td>
<td>(</td>
<td class="paramtype">char * </td>
<td class="paramname"><em>string</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>escaped</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>len</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p><code>#include <<a class="el" href="libwebsockets_8h.html">lib/libwebsockets.h</a>></code></p>
<p><a class="el" href="group__urlendec.html#gaa373a9c16acdd96c395af61ab915ece3">lws_urldecode()</a> - like strncpy but with urldecoding</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">string</td><td>output buffer </td></tr>
<tr><td class="paramname">escaped</td><td>input buffer ('\0' terminated) </td></tr>
<tr><td class="paramname">len</td><td>output buffer max length</td></tr>
</table>
</dd>
</dl>
<p>This is only useful for '\0' terminated strings</p>
<p>Since urldecoding only shrinks the output string, it is possible to do it in-place, ie, string == escaped </p>
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<a id="gabc2888476e50e001c875c1a8abf455b7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gabc2888476e50e001c875c1a8abf455b7">§ </a></span>lws_urlencode()</h2>
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<td class="memname">LWS_VISIBLE LWS_EXTERN const char* lws_urlencode </td>
<td>(</td>
<td class="paramtype">char * </td>
<td class="paramname"><em>escaped</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>string</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>len</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p><code>#include <<a class="el" href="libwebsockets_8h.html">lib/libwebsockets.h</a>></code></p>
<p><a class="el" href="group__urlendec.html#gabc2888476e50e001c875c1a8abf455b7">lws_urlencode()</a> - like strncpy but with urlencoding</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">escaped</td><td>output buffer </td></tr>
<tr><td class="paramname">string</td><td>input buffer ('/0' terminated) </td></tr>
<tr><td class="paramname">len</td><td>output buffer max length</td></tr>
</table>
</dd>
</dl>
<p>Because urlencoding expands the output string, it's not possible to do it in-place, ie, with escaped == string </p>
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