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Responsive images: fix the check whether the attachment meta matches the image src to work with http/https and CDNs. 

Props webaware, joemcgill, azaozz.
Fixes #35045 and #35102 for trunk.

git-svn-id: https://develop.svn.wordpress.org/trunk@36121 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Andrew Ozz 2015-12-30 01:03:11 +00:00
parent f39a799718
commit 8686ab4a7a
2 changed files with 67 additions and 31 deletions
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60
src/wp-includes/media.php
View File

@ -996,6 +996,16 @@ function wp_get_attachment_image_srcset( $attachment_id, $size = 'medium', $imag
* @return string|bool The 'srcset' attribute value. False on error or when only one source exists.
*/
function wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id = 0 ) {
/**
* Let plugins pre-filter the image meta to be able to fix inconsistencies in the stored data.
*
* @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'.
* @param array $size_array Array of width and height values in pixels (in that order).
* @param string $image_src The 'src' of the image.
* @param int $attachment_id The image attachment ID or 0 if not supplied.
*/
$image_meta = apply_filters( 'wp_calculate_image_srcset_meta', $image_meta, $size_array, $image_src, $attachment_id );
if ( empty( $image_meta['sizes'] ) ) {
return false;
}
@ -1012,7 +1022,6 @@ function wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attac
}
$image_basename = wp_basename( $image_meta['file'] );
$image_baseurl = _wp_upload_dir_baseurl();
/*
* WordPress flattens animated GIFs into one frame when generating intermediate sizes.
@ -1029,16 +1038,15 @@ function wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attac
return false;
}
// Uploads are (or have been) in year/month sub-directories.
if ( $image_basename !== $image_meta['file'] ) {
$dirname = _wp_get_attachment_relative_path( $image_meta['file'] );
// Retrieve the uploads sub-directory from the full size image.
$dirname = _wp_get_attachment_relative_path( $image_meta['file'] );
if ( $dirname ) {
$image_baseurl = trailingslashit( $image_baseurl ) . $dirname;
}
if ( $dirname ) {
$dirname = trailingslashit( $dirname );
}
$image_baseurl = trailingslashit( $image_baseurl );
$image_baseurl = _wp_upload_dir_baseurl();
$image_baseurl = trailingslashit( $image_baseurl ) . $dirname;
/*
* Images that have been edited in WordPress after being uploaded will
@ -1060,12 +1068,24 @@ function wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attac
// Array to hold URL candidates.
$sources = array();
/**
* To make sure the ID matches our image src, we will check to see if any sizes in our attachment
* meta match our $image_src. If no mathces are found we don't return a srcset to avoid serving
* an incorrect image. See #35045.
*/
$src_matched = false;
/*
* Loop through available images. Only use images that are resized
* versions of the same edit.
*/
foreach ( $image_sizes as $image ) {
// If the file name is part of the `src`, we've confirmed a match.
if ( ! $src_matched && false !== strpos( $image_src, $dirname . $image['file'] ) ) {
$src_matched = true;
}
// Filter out images that are from previous edits.
if ( $image_edited && ! strpos( $image['file'], $image_edit_hash[0] ) ) {
continue;
@ -1129,7 +1149,7 @@ function wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attac
$sources = apply_filters( 'wp_calculate_image_srcset', $sources, $size_array, $image_src, $image_meta, $attachment_id );
// Only return a 'srcset' value if there is more than one source.
if ( count( $sources ) < 2 ) {
if ( ! $src_matched || count( $sources ) < 2 ) {
return false;
}
@ -1311,28 +1331,6 @@ function wp_image_add_srcset_and_sizes( $image, $image_meta, $attachment_id ) {
return $image;
}
$base_url = trailingslashit( _wp_upload_dir_baseurl() );
$image_base_url = $base_url;
$dirname = _wp_get_attachment_relative_path( $image_meta['file'] );
if ( $dirname ) {
$image_base_url .= trailingslashit( $dirname );
}
$all_sizes = wp_list_pluck( $image_meta['sizes'], 'file' );
foreach ( $all_sizes as $key => $file ) {
$all_sizes[ $key ] = $image_base_url . $file;
}
// Add the original image.
$all_sizes[] = $image_base_url . basename( $image_meta['file'] );
// Bail early if the image src doesn't match any of the known image sizes.
if ( ! in_array( $image_src, $all_sizes ) ) {
return $image;
}
$width = preg_match( '/ width="([0-9]+)"/', $image, $match_width ) ? (int) $match_width[1] : 0;
$height = preg_match( '/ height="([0-9]+)"/', $image, $match_height ) ? (int) $match_height[1] : 0;

38
tests/phpunit/tests/media.php
View File

@ -1265,4 +1265,42 @@ EOF;
// Intermediate sized GIFs should not include the full size in the srcset.
$this->assertFalse( strpos( wp_calculate_image_srcset( $size_array, $large_src, $image_meta ), $full_src ) );
}
/**
* @ticket 35045
* @ticket 33641
*/
function test_wp_make_content_images_responsive_schemes() {
$image_meta = wp_get_attachment_metadata( self::$large_id );
$size_array = $this->_get_image_size_array_from_name( 'medium' );
$srcset = sprintf( 'srcset="%s"', wp_get_attachment_image_srcset( self::$large_id, $size_array, $image_meta ) );
$sizes = sprintf( 'sizes="%s"', wp_get_attachment_image_sizes( self::$large_id, $size_array, $image_meta ) );
// Build HTML for the editor.
$img = get_image_tag( self::$large_id, '', '', '', 'medium' );
$img_https = str_replace( 'http://', 'https://', $img );
$img_relative = str_replace( 'http://', '//', $img );
// Manually add srcset and sizes to the markup from get_image_tag().
$respimg = preg_replace( '|<img ([^>]+) />|', '<img $1 ' . $srcset . ' ' . $sizes . ' />', $img );
$respimg_https = preg_replace( '|<img ([^>]+) />|', '<img $1 ' . $srcset . ' ' . $sizes . ' />', $img_https );
$respimg_relative = preg_replace( '|<img ([^>]+) />|', '<img $1 ' . $srcset . ' ' . $sizes . ' />', $img_relative );
$content = '
<p>Image, http: protocol. Should have srcset and sizes.</p>
%1$s
<p>Image, https: protocol. Should have srcset and sizes.</p>
%2$s
<p>Image, protocol-relative. Should have srcset and sizes.</p>
%3$s';
$unfiltered = sprintf( $content, $img, $img_https, $img_relative );
$expected = sprintf( $content, $respimg, $respimg_https, $respimg_relative );
$actual = wp_make_content_images_responsive( $unfiltered );
$this->assertSame( $expected, $actual );
}
}