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

Fix conversion of forms with relative action URLs #4003

Merged
merged 2 commits into from
Dec 22, 2019
+26 −3
Merged

Fix conversion of forms with relative action URLs #4003

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
a825a9d
Fix conversion of forms with relative action URLs
westonruter Dec 20, 2019
1378cd0
Re-use schemeless-host variable
westonruter Dec 21, 2019
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
16 changes: 14 additions & 2 deletions includes/sanitizers/class-amp-form-sanitizer.php
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -67,9 +67,21 @@ public function sanitize() {
$action_url = esc_url_raw( '//' . $_SERVER['HTTP_HOST'] . wp_unslash( $_SERVER['REQUEST_URI'] ) );
} else {
$action_url = $node->getAttribute( 'action' );
// Check if action_url is a relative path and add the host to it.

// Handle relative URLs.
if ( ! preg_match( '#^(https?:)?//#', $action_url ) ) {
$action_url = esc_url_raw( '//' . $_SERVER['HTTP_HOST'] . $action_url );
$schemeless_host = '//' . $_SERVER['HTTP_HOST'];
if ( '?' === $action_url[0] || '#' === $action_url[0] ) {
// For actions consisting of only a query or URL fragment, include the schemeless-host and the REQUEST URI of the current page.
$action_url = $schemeless_host . wp_unslash( $_SERVER['REQUEST_URI'] ) . $action_url;
} elseif ( '.' === $action_url[0] ) {
Copy link
Member Author

Choose a reason for hiding this comment

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

Note: the '.' check was not correct here. See #4250 (review)

// For actions consisting of relative paths (e.g. '../'), prepend the schemeless-host and a trailing-slashed REQUEST URI.
$action_url = $schemeless_host . trailingslashit( wp_unslash( $_SERVER['REQUEST_URI'] ) ) . $action_url;
} else {
// Otherwise, when the action URL includes an absolute path, just append it to the schemeless-host.
$action_url = $schemeless_host . $action_url;
}
$action_url = esc_url_raw( $action_url );
}
}
$xhr_action = $node->getAttribute( 'action-xhr' );
Expand Down
13 changes: 12 additions & 1 deletion tests/php/test-amp-form-sanitizer.php
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -93,7 +93,18 @@ public function get_data() {
'<form method="post" action="/login/"></form>',
'#' . preg_quote( '<form method="post" action-xhr="//example.org/login/?_wp_amp_action_xhr_converted=1" target="_top">', '#' ) . $form_template_pattern . '</form>#s',
],

'form_with_relative_path_action_url' => [
'<form method="post" action="../"></form>',
'#' . preg_quote( '<form method="post" action-xhr="//example.org/current-page/../?_wp_amp_action_xhr_converted=1" target="_top">', '#' ) . $form_template_pattern . '</form>#s',
],
'form_with_relative_query_action_url' => [
'<form method="post" action="?foo=bar"></form>',
'#' . preg_quote( '<form method="post" action-xhr="//example.org/current-page/?foo=bar&amp;_wp_amp_action_xhr_converted=1" target="_top">', '#' ) . $form_template_pattern . '</form>#s',
],
'form_with_relative_fragment_action_url' => [
'<form method="post" action="#foo"></form>',
'#' . preg_quote( '<form method="post" action-xhr="//example.org/current-page/?_wp_amp_action_xhr_converted=1#foo" target="_top">', '#' ) . $form_template_pattern . '</form>#s',
],
'test_with_dev_mode' => [
'<form data-ampdevmode="" action="javascript:"></form>',
null, // No change.
Expand Down