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Feeds: Don't attempt to generate RSS feeds for invalid feed URLs such as wp-content/feed.

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Props stevenkword, JRGould, lyubomir_popov, johnbillion
Fixes #30210


git-svn-id: https://develop.svn.wordpress.org/trunk@38929 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
John Blackbourn 2016-10-25 21:53:22 +00:00
parent ad25902a65
commit 895203b3e4
2 changed files with 232 additions and 3 deletions
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12
src/wp-includes/functions.php
View File

@ -1213,6 +1213,18 @@ function bool_from_yn( $yn ) {
function do_feed() {
global $wp_query;
// Determine if we are looking at the main comment feed
$is_main_comments_feed = ( $wp_query->is_comment_feed() && ! $wp_query->is_singular() );
/*
* Check the queried object for the existence of posts if it is not a feed for an archive,
* search result, or main comments. By checking for the absense of posts we can prevent rendering the feed
* templates at invalid endpoints. e.g.) /wp-content/plugins/feed/
*/
if ( ! $wp_query->have_posts() && ! ( $wp_query->is_archive() || $wp_query->is_search() || $is_main_comments_feed ) ) {
wp_die( __( 'ERROR: This is not a valid feed.' ), '', array( 'response' => 404 ) );
}
$feed = get_query_var( 'feed' );
// Remove the pad, if present.

223
tests/phpunit/tests/feed/rss2.php
View File

@ -12,6 +12,7 @@ class Tests_Feeds_RSS2 extends WP_UnitTestCase {
static $user_id;
static $posts;
static $category;
static $post_date;
/**
* Setup a new user and attribute some posts.
@ -25,16 +26,20 @@ class Tests_Feeds_RSS2 extends WP_UnitTestCase {
) );
// Create a taxonomy
self::$category = self::factory()->category->create_and_get( array(
'name' => 'Test Category',
'slug' => 'test-cat',
self::$category = $factory->category->create_and_get( array(
'name' => 'Foo Category',
'slug' => 'foo',
) );
// Set a predictable time for testing date archives.
self::$post_date = '2003-05-27 10:07:53';
$count = get_option( 'posts_per_rss' ) + 1;
// Create a few posts
self::$posts = $factory->post->create_many( $count, array(
'post_author' => self::$user_id,
'post_date' => self::$post_date,
'post_content' => 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec velit massa, ultrices eu est suscipit, mattis posuere est. Donec vitae purus lacus. Cras vitae odio odio.',
'post_excerpt' => 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.',
) );
@ -55,6 +60,9 @@ class Tests_Feeds_RSS2 extends WP_UnitTestCase {
$this->excerpt_only = get_option( 'rss_use_excerpt' );
// this seems to break something
update_option( 'use_smilies', false );
$this->set_permalink_structure( '/%year%/%monthnum%/%day%/%postname%/' );
create_initial_taxonomies();
}
/**
@ -250,4 +258,213 @@ class Tests_Feeds_RSS2 extends WP_UnitTestCase {
remove_filter( 'comments_open', '__return_false' );
}
/*
* Check to make sure we are rendering feed templates for the home feed.
* e.g. https://example.com/feed/
*
* @ticket 30210
*/
function test_valid_home_feed_endpoint() {
// An example of a valid home feed endpoint.
$this->go_to( 'feed/' );
// Verify the query object is a feed.
$this->assertQueryTrue( 'is_feed' );
// Queries performed on valid feed endpoints should contain posts.
$this->assertTrue( have_posts() );
// Check to see if we have the expected XML output from the feed template.
$feed = $this->do_rss2();
$xml = xml_to_array( $feed );
// Get the <rss> child element of <xml>.
$rss = xml_find( $xml, 'rss' );
// There should only be one <rss> child element.
$this->assertEquals( 1, count( $rss ) );
}
/*
* Check to make sure we are rendering feed templates for the taxonomy feeds.
* e.g. https://example.com/category/foo/feed/
*
* @ticket 30210
*/
function test_valid_taxonomy_feed_endpoint() {
// An example of an valid taxonomy feed endpoint.
$this->go_to( 'category/foo/feed/' );
// Verify the query object is a feed.
$this->assertQueryTrue( 'is_feed', 'is_archive', 'is_category' );
// Queries performed on valid feed endpoints should contain posts.
$this->assertTrue( have_posts() );
// Check to see if we have the expected XML output from the feed template.
$feed = $this->do_rss2();
$xml = xml_to_array( $feed );
// Get the <rss> child element of <xml>.
$rss = xml_find( $xml, 'rss' );
// There should only be one <rss> child element.
$this->assertEquals( 1, count( $rss ) );
}
/*
* Check to make sure we are rendering feed templates for the main comment feed.
* e.g. https://example.com/comments/feed/
*
* @ticket 30210
*/
function test_valid_main_comment_feed_endpoint() {
// Generate a bunch of comments
foreach ( self::$posts as $post ) {
self::factory()->comment->create_post_comments( $post, 3 );
}
// An example of an valid main comment feed endpoint.
$this->go_to( 'comments/feed/' );
// Verify the query object is a feed.
$this->assertQueryTrue( 'is_feed', 'is_comment_feed' );
// Queries performed on valid feed endpoints should contain comments.
$this->assertTrue( have_comments() );
// Check to see if we have the expected XML output from the feed template.
$feed = $this->do_rss2();
$xml = xml_to_array( $feed );
// Get the <rss> child element of <xml>.
$rss = xml_find( $xml, 'rss' );
// There should only be one <rss> child element.
$this->assertEquals( 1, count( $rss ) );
}
/*
* Check to make sure we are rendering feed templates for the date archive feeds.
* e.g. https://example.com/2003/05/27/feed/
*
* @ticket 30210
*/
function test_valid_archive_feed_endpoint() {
// An example of an valid date archive feed endpoint.
$this->go_to( '2003/05/27/feed/' );
// Verify the query object is a feed.
$this->assertQueryTrue( 'is_feed', 'is_archive', 'is_day', 'is_date' );
// Queries performed on valid feed endpoints should contain posts.
$this->assertTrue( have_posts() );
// Check to see if we have the expected XML output from the feed template.
$feed = $this->do_rss2();
$xml = xml_to_array( $feed );
// Get the <rss> child element of <xml>.
$rss = xml_find( $xml, 'rss' );
// There should only be one <rss> child element.
$this->assertEquals( 1, count( $rss ) );
}
/*
* Check to make sure we are rendering feed templates for single post comment feeds.
* e.g. https://example.com/2003/05/27/post-name/feed/
*
* @ticket 30210
*/
function test_valid_single_post_comment_feed_endpoint() {
// An example of an valid date archive feed endpoint.
$this->go_to( get_post_comments_feed_link( self::$posts[0] ) );
// Verify the query object is a feed.
$this->assertQueryTrue( 'is_feed', 'is_comment_feed', 'is_single', 'is_singular' );
// Queries performed on valid feed endpoints should contain posts.
$this->assertTrue( have_posts() );
// Check to see if we have the expected XML output from the feed template.
$feed = $this->do_rss2();
$xml = xml_to_array( $feed );
// Get the <rss> child element of <xml>.
$rss = xml_find( $xml, 'rss' );
// There should only be one <rss> child element.
$this->assertEquals( 1, count( $rss ) );
}
/*
* Check to make sure we are rendering feed templates for the search archive feeds.
* e.g. https://example.com/?s=Lorem&feed=rss
*
* @ticket 30210
*/
function test_valid_search_feed_endpoint() {
// An example of an valid search feed endpoint
$this->go_to( '?s=Lorem&feed=rss' );
// Verify the query object is a feed.
$this->assertQueryTrue( 'is_feed', 'is_search' );
// Queries performed on valid feed endpoints should contain posts.
$this->assertTrue( have_posts() );
// Check to see if we have the expected XML output from the feed template.
$feed = $this->do_rss2();
$xml = xml_to_array( $feed );
// Get the <rss> child element of <xml>.
$rss = xml_find( $xml, 'rss' );
// There should only be one <rss> child element.
$this->assertEquals( 1, count( $rss ) );
}
/*
* Check to make sure we are not rendering feed templates for invalid feed endpoints.
* e.g. https://example.com/wp-content/feed/
*
* @ticket 30210
*/
function test_invalid_feed_endpoint() {
// An example of an invalid feed endpoint
$this->go_to( 'wp-content/feed/' );
// Queries performed on invalid feed endpoints should never contain posts.
$this->assertFalse( have_posts() );
// This is the assertion. Once the exception is thrown in do_feed, execution stops, preventing futher assertions.
$this->setExpectedException( 'WPDieException', 'ERROR: This is not a valid feed.' );
do_feed();
}
/*
* Make sure the requested feed is registered before rendering the requested template.
*
* @ticket 30210
*/
function test_nonexistent_feeds() {
global $wp_rewrite;
$badfeed = 'badfeed';
$this->assertNotContains( $badfeed, $wp_rewrite->feeds );
$this->go_to( '/?feed=' . $badfeed );
// This is the assertion. Once the exception is thrown in do_feed, execution stops, preventing futher assertions.
$this->setExpectedException( 'WPDieException', 'ERROR: This is not a valid feed template.' );
do_feed();
}
}