Changeset 60084 for trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php

Timestamp:

03/25/2025 02:04:47 PM (3 months ago)

Author:

adamsilverstein

Message:

Media: prevent uploading image types the server doesn’t support.

Normalize behavior between uploading in the media library and uploading directly to the block editor. Now, when uploading an image with a mime type the server does not support (either in the media library or the block editor), the user will see an error message “This image cannot be processed by the web server. Convert it to JPEG or PNG before uploading”.

Alos, add a new filter wp_prevent_unsupported_mime_type_uploads which determines whether the server should prevent uploads for image types it doesn't support. The default value is true and the filter also receives the uploaded image mime type.

Props: joomskys, adamsilverstein, azaozz, swissspidy, joemcgill, flixos90, audrasjb. 

Fixes #61167

File:

• trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php (modified) (1 diff)

trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php

@@ -134 +134 @@
                 array( 'status' => rest_authorization_required_code() )
             );
+        }
+        $files = $request->get_file_params();
+
+        /**
+         * Filter whether the server should prevent uploads for image types it doesn't support. Default true.
+         *
+         * Developers can use this filter to enable uploads of certain image types. By default image types that are not
+         * supported by the server are prevented from being uploaded.
+         *
+         * @since 6.8.0
+         *
+         * @param bool        $check_mime Whether to prevent uploads of unsupported image types.
+         * @param string|null $mime_type  The mime type of the file being uploaded (if available).
+         */
+        $prevent_unsupported_uploads = apply_filters( 'wp_prevent_unsupported_mime_type_uploads', true, isset( $files['file']['type'] ) ? $files['file']['type'] : null );
+
+        // If the upload is an image, check if the server can handle the mime type.
+        if (
+            $prevent_unsupported_uploads &&
+            isset( $files['file']['type'] ) &&
+            str_starts_with( $files['file']['type'], 'image/' )
+        ) {
+            // Check if the image editor supports the type.
+            if ( ! wp_image_editor_supports( array( 'mime_type' => $files['file']['type'] ) ) ) {
+                return new WP_Error(
+                    'rest_upload_image_type_not_supported',
+                    __( 'The web server cannot generate responsive image sizes for this image. Convert it to JPEG or PNG before uploading.' ),
+                    array( 'status' => 400 )
+                );
+            }
         }