Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Refines handling of 0 and empty height/width attributes #979

Merged
merged 9 commits into from Feb 27, 2018
Merged

Refines handling of 0 and empty height/width attributes #979

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
9 commits
Select commit Hold shift + click to select a range
27c38e9
Refines handling of 0 and unset height/width attrs
davisshaver Feb 26, 2018
722d173
Applies PHPCS cleanup
davisshaver Feb 26, 2018
ba2aa93
Fixes spacing on multi-line function call
davisshaver Feb 26, 2018
94424d6
Adjusts spacing in img sanitizer test
davisshaver Feb 26, 2018
6bdc18c
Applies better spacing to `=>`
davisshaver Feb 26, 2018
b1da905
Actually include float value in decimal test
davisshaver Feb 26, 2018
88d9d7a
Incorporates feedback from code review
davisshaver Feb 27, 2018
6926f9b
Removes superfluous whitespace
davisshaver Feb 27, 2018
929698e
Add test for zero width and height
davisshaver Feb 27, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
16 changes: 12 additions & 4 deletions includes/sanitizers/class-amp-base-sanitizer.php
View file
Open in desktop
Expand Up @@ -174,12 +174,15 @@ protected function get_body_node() {
* @return float|int|string Returns a numeric dimension value, or an empty string.
*/
public function sanitize_dimension( $value, $dimension ) {
if ( empty( $value ) ) {

// Allows 0 to be used as valid dimension.
if ( null === $value ) {
return '';
}

if ( false !== filter_var( $value, FILTER_VALIDATE_INT ) ) {
return absint( $value );
// Accepts both integers and floats & prevents negative values.
if ( is_numeric( $value ) ) {
return max( 0, floatval( $value ) );
}

if ( AMP_String_Utils::endswith( $value, 'px' ) ) {
Expand Down Expand Up @@ -252,7 +255,12 @@ public function enforce_sizes_attribute( $attributes ) {
$max_width = $this->args['content_max_width'];
}

$attributes['sizes'] = sprintf( '(min-width: %1$dpx) %1$dpx, 100vw', absint( $max_width ) );
// Allows floats and integers but prevents negative values.
// Uses string format to prevent additional modification.
$attributes['sizes'] = sprintf(
'(min-width: %1$spx) %1$spx, 100vw',
max( 0, floatval( $max_width ) )
);

$this->add_or_append_attribute( $attributes, 'class', 'amp-wp-enforced-sizes' );

Expand Down
28 changes: 20 additions & 8 deletions includes/sanitizers/class-amp-img-sanitizer.php
View file
Open in desktop
Expand Up @@ -79,7 +79,7 @@ public function sanitize() {
}

// Determine which images need their dimensions determined/extracted.
if ( '' === $node->getAttribute( 'width' ) || '' === $node->getAttribute( 'height' ) ) {
if ( ! is_numeric( $node->getAttribute( 'width' ) ) || ! is_numeric( $node->getAttribute( 'height' ) ) ) {
$need_dimensions[ $node->getAttribute( 'src' ) ][] = $node;
} else {
$this->adjust_and_replace_node( $node );
Expand Down Expand Up @@ -154,18 +154,30 @@ private function determine_dimensions( $need_dimensions ) {
if ( ! $node instanceof DOMElement ) {
continue;
}

// Provide default dimensions for images whose dimensions we couldn't fetch.
if ( false !== $dimensions ) {
$node->setAttribute( 'width', $dimensions['width'] );
$node->setAttribute( 'height', $dimensions['height'] );
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

These should not have been removed. See #1117.

} else {
$width = isset( $this->args['content_max_width'] ) ? $this->args['content_max_width'] : self::FALLBACK_WIDTH;
if (
! is_numeric( $node->getAttribute( 'width' ) ) &&
! is_numeric( $node->getAttribute( 'height' ) )
) {
$height = self::FALLBACK_HEIGHT;
$width = self::FALLBACK_WIDTH;
$node->setAttribute( 'width', $width );
$node->setAttribute( 'height', $height );
$class = $node->hasAttribute( 'class' ) ? $node->getAttribute( 'class' ) . ' amp-wp-unknown-size' : 'amp-wp-unknown-size';
$node->setAttribute( 'class', $class );
} elseif (
! is_numeric( $node->getAttribute( 'height' ) )
) {
$height = self::FALLBACK_HEIGHT;
$node->setAttribute( 'height', $height );
$class = $node->hasAttribute( 'class' ) ? $node->getAttribute( 'class' ) . ' amp-wp-unknown-size amp-wp-unknown-height' : 'amp-wp-unknown-size amp-wp-unknown-height';
$node->setAttribute( 'class', $class );
} elseif (
! is_numeric( $node->getAttribute( 'width' ) )
) {
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Indentation of this elseif line is inconsistent with the previous multi-line elseif.

$width = self::FALLBACK_WIDTH;
$node->setAttribute( 'width', $width );
$class = $node->hasAttribute( 'class' ) ? $node->getAttribute( 'class' ) . ' amp-wp-unknown-size amp-wp-unknown-width' : 'amp-wp-unknown-size amp-wp-unknown-width';
$node->setAttribute( 'class', $class );
}
}
}
Expand Down
54 changes: 42 additions & 12 deletions tests/test-amp-img-sanitizer.php
View file
Open in desktop
Expand Up @@ -12,42 +12,72 @@ public function setUp() {

public function get_data() {
return array(
'no_images' => array(
'no_images' => array(
'<p>Lorem Ipsum Demet Delorit.</p>',
'<p>Lorem Ipsum Demet Delorit.</p>',
),

'image_without_src' => array(
'image_without_src' => array(
'<p><img width="300" height="300" /></p>',
'<p></p>',
),

'image_with_empty_src' => array(
'image_with_empty_src' => array(
'<p><img src="" width="300" height="300" /></p>',
'<p></p>',
),

'image_with_self_closing_tag' => array(
'image_with_empty_width_and_height' => array(
'<p><img src="http://placehold.it/300x300" width="" height="" /></p>',
'<p><amp-img src="http://placehold.it/300x300" width="600" height="400" class="amp-wp-unknown-size amp-wp-enforced-sizes" sizes="(min-width: 600px) 600px, 100vw"></amp-img></p>',
),

'image_with_empty_width' => array(
'<p><img src="http://placehold.it/300x300" width="" height="300" /></p>',
'<p><amp-img src="http://placehold.it/300x300" width="600" height="300" class="amp-wp-unknown-size amp-wp-unknown-width amp-wp-enforced-sizes" sizes="(min-width: 600px) 600px, 100vw"></amp-img></p>',
),

'image_with_empty_height' => array(
'<p><img src="http://placehold.it/300x300" width="300" height="" /></p>',
'<p><amp-img src="http://placehold.it/300x300" width="300" height="400" class="amp-wp-unknown-size amp-wp-unknown-height amp-wp-enforced-sizes" sizes="(min-width: 300px) 300px, 100vw"></amp-img></p>',
),

'image_with_zero_width' => array(
'<p><img src="http://placehold.it/300x300" width="0" height="300" /></p>',
'<p><amp-img src="http://placehold.it/300x300" width="0" height="300" sizes="(min-width: 0px) 0px, 100vw" class="amp-wp-enforced-sizes"></amp-img></p>',
),
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Please also include a test with a zero width and height so we can ensure that the support topic is covered:

<img src="https://example.com/img.jpg" width="0" height="0" border="0">

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Could you add a test for this?

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Done ✔️


'image_with_zero_width_and_height' => array(
'<p><img src="http://placehold.it/300x300" width="0" height="0" /></p>',
'<p><amp-img src="http://placehold.it/300x300" width="0" height="0" sizes="(min-width: 0px) 0px, 100vw" class="amp-wp-enforced-sizes"></amp-img></p>',
),

'image_with_decimal_width' => array(
'<p><img src="http://placehold.it/300x300" width="299.5" height="300" /></p>',
'<p><amp-img src="http://placehold.it/300x300" width="299.5" height="300" sizes="(min-width: 299.5px) 299.5px, 100vw" class="amp-wp-enforced-sizes"></amp-img></p>',
),

'image_with_self_closing_tag' => array(
'<img src="http://placehold.it/350x150" width="350" height="150" alt="Placeholder!" />',
'<amp-img src="http://placehold.it/350x150" width="350" height="150" alt="Placeholder!" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img>',
),

'image_with_no_end_tag' => array(
'image_with_no_end_tag' => array(
'<img src="http://placehold.it/350x150" width="350" height="150" alt="Placeholder!">',
'<amp-img src="http://placehold.it/350x150" width="350" height="150" alt="Placeholder!" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img>',
),

'image_with_end_tag' => array(
'image_with_end_tag' => array(
'<img src="http://placehold.it/350x150" width="350" height="150" alt="Placeholder!"></img>',
'<amp-img src="http://placehold.it/350x150" width="350" height="150" alt="Placeholder!" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img>',
),

'image_with_on_attribute' => array(
'image_with_on_attribute' => array(
'<img src="http://placehold.it/350x150" on="tap:my-lightbox" width="350" height="150" />',
'<amp-img src="http://placehold.it/350x150" on="tap:my-lightbox" width="350" height="150" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img>',
),

'image_with_blacklisted_attribute' => array(
'image_with_blacklisted_attribute' => array(
'<img src="http://placehold.it/350x150" width="350" height="150" style="border: 1px solid red;" />',
'<amp-img src="http://placehold.it/350x150" width="350" height="150" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img>',
),
Expand All @@ -62,17 +92,17 @@ public function get_data() {
'<amp-img src="http://placehold.it/350x150" width="350" height="150" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img>',
),

'gif_image_conversion' => array(
'gif_image_conversion' => array(
'<img src="http://placehold.it/350x150.gif" width="350" height="150" alt="Placeholder!" />',
'<amp-anim src="http://placehold.it/350x150.gif" width="350" height="150" alt="Placeholder!" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-anim>',
),

'gif_image_url_with_querystring' => array(
'gif_image_url_with_querystring' => array(
'<img src="http://placehold.it/350x150.gif?foo=bar" width="350" height="150" alt="Placeholder!" />',
'<amp-anim src="http://placehold.it/350x150.gif?foo=bar" width="350" height="150" alt="Placeholder!" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-anim>',
),

'multiple_same_image' => array(
'multiple_same_image' => array(
'<img src="http://placehold.it/350x150" width="350" height="150" />
<img src="http://placehold.it/350x150" width="350" height="150" />
<img src="http://placehold.it/350x150" width="350" height="150" />
Expand All @@ -81,7 +111,7 @@ public function get_data() {
'<amp-img src="http://placehold.it/350x150" width="350" height="150" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img><amp-img src="http://placehold.it/350x150" width="350" height="150" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img><amp-img src="http://placehold.it/350x150" width="350" height="150" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img><amp-img src="http://placehold.it/350x150" width="350" height="150" sizes="(min-width: 350px) 350px, 100vw" class="amp-wp-enforced-sizes"></amp-img>',
),

'multiple_different_images' => array(
'multiple_different_images' => array(
'<img src="http://placehold.it/350x150" width="350" height="150" />
<img src="http://placehold.it/360x160" width="360" height="160" />
<img src="http://placehold.it/370x170" width="370" height="170" />
Expand Down