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Use WP Rest API infrastructure for previews #583

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Use WP Rest API infrastructure for previews #583

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4551455
Use WP Rest API infrastructure for previews
mattheu Mar 2, 2016
983fd81
Use GET not POST for previews
mattheu Mar 2, 2016
ee1a85b
Clean up files
mattheu Mar 2, 2016
8ea5bf1
use rest_url
mattheu Mar 2, 2016
2ed8e06
Remove registration of shortcode preview action
mattheu Mar 2, 2016
e90671f
Fix CI issues
mattheu Mar 2, 2016
8c4e48f
CS - comma on each line of array
mattheu Mar 2, 2016
9699213
use permission callback on endpoints
mattheu Mar 3, 2016
e6392c1
Better error handling
mattheu Mar 3, 2016
0f4358e
Fix PHP 5.2 errors
mattheu Mar 3, 2016
07bc866
Merge remote-tracking branch 'origin/master' into use-rest-api
mattheu Jun 27, 2016
b4cbbce
PHPUnit tests for rest requests
mattheu Jun 27, 2016
22c10fa
Make tests work on PHP 5.2
mattheu Jun 27, 2016
3dfbaa5
PHP 5.2 fix
mattheu Jun 27, 2016
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102 changes: 78 additions & 24 deletions inc/class-shortcode-ui.php
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Original file line number Diff line number Diff line change
Expand Up @@ -68,9 +68,34 @@ private function setup_actions() {
add_action( 'admin_enqueue_scripts', array( $this, 'action_admin_enqueue_scripts' ) );
add_action( 'wp_enqueue_editor', array( $this, 'action_wp_enqueue_editor' ) );
add_action( 'wp_ajax_bulk_do_shortcode', array( $this, 'handle_ajax_bulk_do_shortcode' ) );
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We can remove this registration, right?

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Oh yep

add_action( 'rest_api_init', array( $this, 'action_rest_api_init' ) );
add_filter( 'wp_editor_settings', array( $this, 'filter_wp_editor_settings' ), 10, 2 );
}

public function action_rest_api_init() {

register_rest_route( 'shortcode-ui/v1', 'preview', array(
'methods' => 'GET',
'callback' => array( $this, 'handle_shortcode_preview' ),
'args' => array(
'query' => array(
'sanitize_callback' => array( $this, 'sanitize_rest_arg_arg_query' ),
),
)
) );

register_rest_route( 'shortcode-ui/v1', 'preview/bulk', array(
'methods' => 'GET',
'callback' => array( $this, 'handle_shortcode_preview_bulk' ),
'args' => array(
'queries' => array(
'sanitize_callback' => array( $this, 'sanitize_rest_arg_arg_queries' ),
),
),
) );

}

/**
* When a WP_Editor is initialized on a page, call the 'register_shortcode_ui' action.
*
Expand Down Expand Up @@ -244,9 +269,13 @@ public function enqueue() {
'insert_content_label' => __( 'Insert Content', 'shortcode-ui' ),
),
'nonces' => array(
'preview' => wp_create_nonce( 'shortcode-ui-preview' ),
'wp_rest' => wp_create_nonce( 'wp_rest' ),
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Unless I'm missing something, we're not checking nonces on any of the REST request handlers. Should we be?

I think there might be a benefit to making this unauthenticated, as then it would be easier to reuse the functionality in external editors and the like. However, that requires a much more solid approach to security, as it opens an attack surface for anyone to compel a server to render an arbitrary shortcode. Given that people still use things like [php] shortcodes, this gets sketchy pretty fast.

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The nonce check is done by the rest API itself. Otherwise the request is treated as unauthenticated - which we are checking for when we do the edit_post caps check.

Interesting thoughts RE opening this up for others. However I think we should keep it authenticated for now. There would be quite a big potential for exploiting this.

@danielbachhuber can you flag and endpoint as requiring auth? Perhaps in the schema?

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Yes, we need to make sure the endpoint implements authentication. We'll want to include a permissions_callback for each endpoint — and it would be good to write tests around this as well.

'thumbnailImage' => wp_create_nonce( 'shortcode-ui-get-thumbnail-image' ),
),
'urls' => array(
'preview' => rest_url( '/shortcode-ui/v1/preview' ),
'bulkPreview' => rest_url( '/shortcode-ui/v1/preview/bulk' ),
),
) );

// add templates to the footer, instead of where we're at now
Expand Down Expand Up @@ -336,7 +365,7 @@ private function render_shortcode_for_preview( $shortcode, $post_id = null ) {
}

if ( ! current_user_can( 'edit_post', $post_id ) ) {
return esc_html__( "Something's rotten in the state of Denmark", 'shortcode-ui' );
return $shortcode;
}

if ( ! empty( $post_id ) ) {
Expand Down Expand Up @@ -366,38 +395,63 @@ private function render_shortcode_for_preview( $shortcode, $post_id = null ) {
}

/**
* Get a bunch of shortcodes to render in MCE preview.
* Get a preview for a single shortcode to render in MCE preview.
*/
public function handle_ajax_bulk_do_shortcode() {

if ( is_array( $_POST['queries'] ) ) {
public function handle_shortcode_preview( WP_REST_Request $request ) {
return $this->get_shortcode_preview( $request->get_param('query') );
}

$responses = array();
/**
* Get a bunch of shortcodes to render in MCE preview.
*/
public function handle_shortcode_preview_bulk( WP_REST_Request $request ) {

foreach ( $_POST['queries'] as $posted_query ) {

// Don't sanitize shortcodes — can contain HTML kses doesn't allow (e.g. sourcecode shortcode)
if ( ! empty( $posted_query['shortcode'] ) ) {
$shortcode = stripslashes( $posted_query['shortcode'] );
} else {
$shortcode = null;
}
if ( isset( $posted_query['post_id'] ) ) {
$post_id = intval( $posted_query['post_id'] );
} else {
$post_id = null;
}
$queries = $request->get_param('queries');
$responses = array();

if ( is_array( $queries ) ) {
foreach ( $queries as $posted_query ) {
$responses[ $posted_query['counter'] ] = array(
'query' => $posted_query,
'response' => $this->render_shortcode_for_preview( $shortcode, $post_id ),
'query' => $posted_query,
'response' => $this->render_shortcode_for_preview( $posted_query['shortcode'], $posted_query['post_id'] ),
);
}
}

return array_filter( $responses );

}

public function sanitize_rest_arg_arg_query( $dirty_args ) {

$clean_args = array(
'shortcode' => null,
'post_id' => null,
);

// Don't sanitize shortcodes — can contain HTML kses doesn't allow (e.g. sourcecode shortcode)
if ( ! empty( $dirty_args['shortcode'] ) ) {
$clean_args['shortcode'] = stripslashes( $dirty_args['shortcode'] );
}

if ( isset( $dirty_args['post_id'] ) ) {
$clean_args['post_id'] = intval( $dirty_args['post_id'] );
}

if ( isset( $dirty_args['nonce'] ) ) {
$clean_args['nonce'] = sanitize_text_field( $dirty_args['nonce'] );
}

wp_send_json_success( $responses );
exit;
if ( isset( $dirty_args['counter'] ) ) {
$clean_args['counter'] = intval( $dirty_args['counter'] );
}

return $clean_args;

}

public function sanitize_rest_arg_arg_queries( $arg ) {
return array_map( array( $this, 'sanitize_rest_arg_arg_query' ), (array) $arg );
}

/**
Expand Down
105 changes: 9 additions & 96 deletions js-tests/build/specs.js
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Original file line number Diff line number Diff line change
Expand Up @@ -382,65 +382,6 @@ describe( "MCE View Constructor", function() {

} );

describe( "Fetch preview HTML", function() {

beforeEach(function() {
jasmine.Ajax.install();
});

afterEach(function() {
jasmine.Ajax.uninstall();
});

var constructor = jQuery.extend( true, {
render: function( force ) {},
}, MceViewConstructor );

// Mock shortcode model data.
constructor.shortcodeModel = jQuery.extend( true, {}, sui.shortcodes.first() );

it( 'Fetches data success', function(){

spyOn( wp.ajax, "post" ).and.callThrough();
spyOn( constructor, "render" );

constructor.fetch();

expect( constructor.fetching ).toEqual( true );
expect( constructor.content ).toEqual( undefined );
expect( wp.ajax.post ).toHaveBeenCalled();
expect( constructor.render ).not.toHaveBeenCalled();

jasmine.Ajax.requests.mostRecent().respondWith( {
'status': 200,
'responseText': '{"success":true,"data":"test preview response body"}'
} );

expect( constructor.fetching ).toEqual( undefined );
expect( constructor.content ).toEqual( 'test preview response body' );
expect( constructor.render ).toHaveBeenCalled();

});

it( 'Handles errors when fetching data', function() {

spyOn( constructor, "render" );

constructor.fetch();

jasmine.Ajax.requests.mostRecent().respondWith( {
'status': 500,
'responseText': '{"success":false}'
});

expect( constructor.fetching ).toEqual( undefined );
expect( constructor.content ).toContain( 'shortcake-error' );
expect( constructor.render ).toHaveBeenCalled();

} );

} );

it( 'parses simple shortcode', function() {
var shortcode = MceViewConstructor.parseShortcodeString( '[test_shortcode attr="test value"]');
expect( shortcode instanceof Shortcode ).toEqual( true );
Expand Down Expand Up @@ -792,13 +733,16 @@ var Fetcher = (function() {
return;
}

var request = $.post( ajaxurl + '?action=bulk_do_shortcode', {
var request = $.get( shortcodeUIData.urls.bulkPreview, {
_wpnonce: shortcodeUIData.nonces.wp_rest,
queries: _.pluck( fetcher.queries, 'query' )
}
);

request.done( function( response ) {
_.each( response.data, function( result, index ) {
request.done( function( responses ) {

_.each( responses, function( result, index ) {

var matchedQuery = _.findWhere( fetcher.queries, {
counter: parseInt( index ),
});
Expand All @@ -807,7 +751,9 @@ var Fetcher = (function() {
fetcher.queries = _.without( fetcher.queries, matchedQuery );
matchedQuery.promise.resolve( result );
}

} );

} );
};

Expand Down Expand Up @@ -942,44 +888,11 @@ var shortcodeViewConstructor = {
*/
delayedFetch: function() {
return fetcher.queueToFetch({
post_id: $( '#post_ID' ).val(),
post_id: $( '#post_ID' ).val(),
shortcode: this.shortcodeModel.formatShortcode(),
nonce: shortcodeUIData.nonces.preview,
});
},

/**
* Fetch a preview of a single shortcode.
*
* Async. Sets this.content and calls this.render.
*
* @return undefined
*/
fetch: function() {
var self = this;

if ( ! this.fetching ) {
this.fetching = true;

wp.ajax.post( 'do_shortcode', {
post_id: $( '#post_ID' ).val(),
shortcode: this.shortcodeModel.formatShortcode(),
nonce: shortcodeUIData.nonces.preview,
}).done( function( response ) {
if ( '' === response ) {
self.content = '<span class="shortcake-notice shortcake-empty">' + self.shortcodeModel.formatShortcode() + '</span>';
} else {
self.content = response;
}
}).fail( function() {
self.content = '<span class="shortcake-error">' + shortcodeUIData.strings.mce_view_error + '</span>';
} ).always( function() {
delete self.fetching;
self.render( null, true );
} );
}
},

/**
* Get the shortcode model and open modal UI for editing.
*
Expand Down
59 changes: 0 additions & 59 deletions js-tests/src/utils/mceViewConstructorSpec.js
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Original file line number Diff line number Diff line change
Expand Up @@ -73,65 +73,6 @@ describe( "MCE View Constructor", function() {

} );

describe( "Fetch preview HTML", function() {

beforeEach(function() {
jasmine.Ajax.install();
});

afterEach(function() {
jasmine.Ajax.uninstall();
});

var constructor = jQuery.extend( true, {
render: function( force ) {},
}, MceViewConstructor );

// Mock shortcode model data.
constructor.shortcodeModel = jQuery.extend( true, {}, sui.shortcodes.first() );

it( 'Fetches data success', function(){

spyOn( wp.ajax, "post" ).and.callThrough();
spyOn( constructor, "render" );

constructor.fetch();

expect( constructor.fetching ).toEqual( true );
expect( constructor.content ).toEqual( undefined );
expect( wp.ajax.post ).toHaveBeenCalled();
expect( constructor.render ).not.toHaveBeenCalled();

jasmine.Ajax.requests.mostRecent().respondWith( {
'status': 200,
'responseText': '{"success":true,"data":"test preview response body"}'
} );

expect( constructor.fetching ).toEqual( undefined );
expect( constructor.content ).toEqual( 'test preview response body' );
expect( constructor.render ).toHaveBeenCalled();

});

it( 'Handles errors when fetching data', function() {

spyOn( constructor, "render" );

constructor.fetch();

jasmine.Ajax.requests.mostRecent().respondWith( {
'status': 500,
'responseText': '{"success":false}'
});

expect( constructor.fetching ).toEqual( undefined );
expect( constructor.content ).toContain( 'shortcake-error' );
expect( constructor.render ).toHaveBeenCalled();

} );

} );

it( 'parses simple shortcode', function() {
var shortcode = MceViewConstructor.parseShortcodeString( '[test_shortcode attr="test value"]');
expect( shortcode instanceof Shortcode ).toEqual( true );
Expand Down
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