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<title>[48642] trunk: REST API: Fix warning when using `set_param()` on a JSON request with no body.</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/48642">48642</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/48642","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>TimothyBlynJacobs</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2020-07-27 18:44:14 +0000 (Mon, 27 Jul 2020)</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'>REST API: Fix warning when using `set_param()` on a JSON request with no body.
In <a href="https://core.trac.wordpress.org/changeset/47559">[47559]</a> the `WP_REST_Request::set_param()` method was adjusted to try and overwrite an existing parameter definition before forcing the value in the first parameter slot. If `set_param()` was called on a request with an `application/json` content type and an empty body, a PHP warning would be issued. This was due to the JSON parameter type not being set to an array when the body is empty.
This commit avoids the warning by adding an `is_array()` check before calling `array_key_exists`. Ideally, `WP_REST_Reuest::parse_json_params()` would set the JSON parameter type to an empty array in this case, but that is too large of a change at this point in the cycle.
Props manooweb.
Fixes <a href="https://core.trac.wordpress.org/ticket/50786">#50786</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesrestapiclasswprestrequestphp">trunk/src/wp-includes/rest-api/class-wp-rest-request.php</a></li>
<li><a href="#trunktestsphpunittestsrestapirestrequestphp">trunk/tests/phpunit/tests/rest-api/rest-request.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunksrcwpincludesrestapiclasswprestrequestphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/rest-api/class-wp-rest-request.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/rest-api/class-wp-rest-request.php 2020-07-27 18:29:43 UTC (rev 48641)
+++ trunk/src/wp-includes/rest-api/class-wp-rest-request.php 2020-07-27 18:44:14 UTC (rev 48642)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -408,7 +408,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $order = $this->get_parameter_order();
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> foreach ( $order as $type ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( array_key_exists( $key, $this->params[ $type ] ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( is_array( $this->params[ $type ] ) && array_key_exists( $key, $this->params[ $type ] ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> return true;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -433,7 +433,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $found_key = false;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> foreach ( $order as $type ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( 'defaults' !== $type && array_key_exists( $key, $this->params[ $type ] ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( 'defaults' !== $type && is_array( $this->params[ $type ] ) && array_key_exists( $key, $this->params[ $type ] ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> $this->params[ $type ][ $key ] = $value;
</span><span class="cx" style="display: block; padding: 0 10px"> $found_key = true;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="trunktestsphpunittestsrestapirestrequestphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/rest-api/rest-request.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/rest-api/rest-request.php 2020-07-27 18:29:43 UTC (rev 48641)
+++ trunk/tests/phpunit/tests/rest-api/rest-request.php 2020-07-27 18:44:14 UTC (rev 48642)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -765,4 +765,18 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertEquals( array( 'param' => 'new_value' ), $request->get_json_params() );
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertEquals( array( 'param' => 'new_value' ), $request->get_query_params() );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+ /**
+ * @ticket 50786
+ */
+ public function test_set_param_with_invalid_json() {
+ $request = new WP_REST_Request();
+ $request->add_header( 'content-type', 'application/json' );
+ $request->set_method( 'POST' );
+ $request->set_body( '' );
+ $request->set_param( 'param', 'value' );
+
+ $this->assertTrue( $request->has_param( 'param' ) );
+ $this->assertEquals( 'value', $request->get_param( 'param' ) );
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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