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<title>[44020] KSES: Make the URI attributes DRY.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/44020">44020</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/44020","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>iandunn</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2018-12-13 00:13:03 +0000 (Thu, 13 Dec 2018)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>KSES: Make the URI attributes DRY.
This commit introduces the `wp_kses_uri_attributes` function and filter. The function centralizes the list of attributes, in order to prevent inconsistency, and the filter provides a way for plugins to customize the attributes.
Merges <a href="https://core.trac.wordpress.org/changeset/44014">[44014]</a> and <a href="https://core.trac.wordpress.org/changeset/44017">[44017]</a> to the `4.9` branch.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branches49srcwpincludesksesphp">branches/4.9/src/wp-includes/kses.php</a></li>
</ul>
<h3>Property Changed</h3>
<ul>
<li><a href="#branches49">branches/4.9/</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<span class="cx" style="display: block; padding: 0 10px">Index: branches/4.9
</span><span class="cx" style="display: block; padding: 0 10px">===================================================================
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">--- branches/4.9 2018-12-13 00:05:32 UTC (rev 44019)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/4.9 2018-12-13 00:13:03 UTC (rev 44020)
</ins><a id="branches49"></a>
<div class="propset"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Property changes: branches/4.9</h4>
<pre class="diff"><span>
</span></pre></div>
<a id="svnmergeinfo"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: svn:mergeinfo</h4></div>
<span class="cx" style="display: block; padding: 0 10px"> /branches/3.1:18031
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.3:20543
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.4:21757
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/branches/5.0:43988,43994
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/branches/5.0:43988,43994,44014,44017
</ins><span class="cx" style="display: block; padding: 0 10px"> /trunk:18512,42132,42134,42136,42138,42140,42144,42146,42148,42150,42152-42153,42155,42157,42159,42161,42163,42169,42171,42173,42175,42177,42181,42183,42185,42187,42189,42191,42193,42199,42203,42210,42214,42220,42222,42226,42242,42244,42247,42251,42256-42261,42350,42358,42362,42364-42368,42374,42388,42390,42401,42417,42421,42423-42425,42430,42432-42433,42437,42441,42443,42446-42447,42449,42451,42453,42457,42459,42462,42491,42521,42529,42531,42533,42536,42538,42541,42543,42545,42549,42566,42568,42570,42572,42574,42576,42579,42581-42582,42584-42585,42587-42588,42590,42592,42594-42595,42598-42599,42602,42604,42606,42611-42613,42615,42617,42624-42625,42639,42648,42652-42653,42665,42676,42687,42695,42697,42702,42711,42713,42719,42722,42726,42728,42739-42740,42744,42758,42772,42791-42792,42801,42814-42815,42817-42818,42823,42830,42837,42839,42841,42844,42851-42852,42860,42864,42881,42888-42889,42892-42894,42930,42964,42967,429
71-42972,42977-42978,42980-42982,42985-42987,42989,42992,42994-42995,42998-42999,43001-43004,43007-43008,43011-43012,43014-43015,43025,43027,43030,43032,43034,43036,43039,43042,43044-43049,43051-43063,43065,43081,43085,43087-43089,43091,43104,43116,43118,43120-43121,43123,43125-43126,43131-43132,43135,43137,43139,43145-43148,43150,43154-43155,43158,43160,43162,43166,43168,43170,43172,43175,43180-43181,43183-43185,43189,43191,43193,43195,43197,43199,43201,43203,43206,43208,43210-43212,43216,43218,43220,43222-43223,43226,43228,43230,43232,43234,43236,43238,43242-43243,43245-43246,43248-43251,43256,43259-43260,43263,43265,43267,43269,43274-43275,43278-43279,43282,43284,43286,43290-43293,43299,43303-43304,43313,43315,43317,43331,43337,43343,43350,43353,43356,43361-43363,43365,43367,43370-43371,43373-43376,43379,43388,43390,43435,43437,43439-43440,43446-43447,43451,43454,43457,43460,43462-43467,43469,43471,43475,43477-43478,43480,43486,43491,43493,43495,43499,43504,43506,43508,43511-4351
3,43518,43525,43527,43529,43531,43541,43550,43559,43567,43580,43593,43597,43599,43609,43636,43638,43653
</span><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches49srcwpincludesksesphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.9/src/wp-includes/kses.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.9/src/wp-includes/kses.php 2018-12-13 00:05:32 UTC (rev 44019)
+++ branches/4.9/src/wp-includes/kses.php 2018-12-13 00:13:03 UTC (rev 44020)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -536,7 +536,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return string Filtered attribute.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_kses_one_attr( $string, $element ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $uris = wp_kses_uri_attributes();
</ins><span class="cx" style="display: block; padding: 0 10px"> $allowed_html = wp_kses_allowed_html( 'post' );
</span><span class="cx" style="display: block; padding: 0 10px"> $allowed_protocols = wp_allowed_protocols();
</span><span class="cx" style="display: block; padding: 0 10px"> $string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -734,6 +734,56 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Helper function listing HTML attributes containing a URL.
+ *
+ * This function returns a list of all HTML attributes that must contain
+ * a URL according to the HTML specification.
+ *
+ * This list includes URI attributes both allowed and disallowed by KSES.
+ *
+ * @link https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes
+ *
+ * @since 5.0.1
+ *
+ * @return array HTML attributes that must include a URL.
+ */
+function wp_kses_uri_attributes() {
+ $uri_attributes = array(
+ 'action',
+ 'archive',
+ 'background',
+ 'cite',
+ 'classid',
+ 'codebase',
+ 'data',
+ 'formaction',
+ 'href',
+ 'icon',
+ 'longdesc',
+ 'manifest',
+ 'poster',
+ 'profile',
+ 'src',
+ 'usemap',
+ 'xmlns',
+ );
+
+ /**
+ * Filters the list of attributes that are required to contain a URL.
+ *
+ * Use this filter to add any `data-` attributes that are required to be
+ * validated as a URL.
+ *
+ * @since 5.0.1
+ *
+ * @param array $uri_attributes HTML attributes requiring validation as a URL.
+ */
+ $uri_attributes = apply_filters( 'wp_kses_uri_attributes', $uri_attributes );
+
+ return $uri_attributes;
+}
+
+/**
</ins><span class="cx" style="display: block; padding: 0 10px"> * Callback for wp_kses_split.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @since 3.1.0
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -930,7 +980,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $attrarr = array();
</span><span class="cx" style="display: block; padding: 0 10px"> $mode = 0;
</span><span class="cx" style="display: block; padding: 0 10px"> $attrname = '';
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $uris = wp_kses_uri_attributes();
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // Loop through the whole attribute list
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre>
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