apply_filters( 'press_this_redirect_in_parent', false ),
);
}
/**
* Get the source's images and save them locally, for posterity, unless we can't.
*
* @since 4.2.0
* @access public
*
* @param int $post_id Post ID.
* @param string $content Optional. Current expected markup for Press This. Expects slashed. Default empty.
* @return string New markup with old image URLs replaced with the local attachment ones if swapped.
*/
public function side_load_images( $post_id, $content = '' ) {
$content = wp_unslash( $content );
if ( preg_match_all( '/![]()
]+>/', $content, $matches ) && current_user_can( 'upload_files' ) ) {
foreach ( (array) $matches[0] as $image ) {
// This is inserted from our JS so HTML attributes should always be in double quotes.
if ( ! preg_match( '/src="([^"]+)"/', $image, $url_matches ) ) {
continue;
}
$image_src = $url_matches[1];
// Don't try to sideload a file without a file extension, leads to WP upload error.
if ( ! preg_match( '/[^\?]+\.(?:jpe?g|jpe|gif|png)(?:\?|$)/i', $image_src ) ) {
continue;
}
// Sideload image, which gives us a new image src.
$new_src = media_sideload_image( $image_src, $post_id, null, 'src' );
if ( ! is_wp_error( $new_src ) ) {
// Replace the POSTED content ![]()
with correct uploaded ones.
// Need to do it in two steps so we don't replace links to the original image if any.
$new_image = str_replace( $image_src, $new_src, $image );
$content = str_replace( $image, $new_image, $content );
}
}
}
// Expected slashed
return wp_slash( $content );
}
/**
* AJAX handler for saving the post as draft or published.
*
* @since 4.2.0
* @access public
*/
public function save_post() {
if ( empty( $_POST['post_ID'] ) || ! $post_id = (int) $_POST['post_ID'] ) {
wp_send_json_error( array( 'errorMessage' => __( 'Missing post ID.' ) ) );
}
if ( empty( $_POST['_wpnonce'] ) || ! wp_verify_nonce( $_POST['_wpnonce'], 'update-post_' . $post_id ) ||
! current_user_can( 'edit_post', $post_id ) ) {
wp_send_json_error( array( 'errorMessage' => __( 'Invalid post.' ) ) );
}
$post = array(
'ID' => $post_id,
'post_title' => ( ! empty( $_POST['post_title'] ) ) ? sanitize_text_field( trim( $_POST['post_title'] ) ) : '',
'post_content' => ( ! empty( $_POST['post_content'] ) ) ? trim( $_POST['post_content'] ) : '',
'post_type' => 'post',
'post_status' => 'draft',
'post_format' => ( ! empty( $_POST['post_format'] ) ) ? sanitize_text_field( $_POST['post_format'] ) : '',
'tax_input' => ( ! empty( $_POST['tax_input'] ) ) ? $_POST['tax_input'] : array(),
'post_category' => ( ! empty( $_POST['post_category'] ) ) ? $_POST['post_category'] : array(),
);
if ( ! empty( $_POST['post_status'] ) && 'publish' === $_POST['post_status'] ) {
if ( current_user_can( 'publish_posts' ) ) {
$post['post_status'] = 'publish';
} else {
$post['post_status'] = 'pending';
}
}
$post['post_content'] = $this->side_load_images( $post_id, $post['post_content'] );
/**
* Filter the post_content of a Press This post before saving/updating, after
* side_load_images action had run.
*
* @since 4.5.0
*
* @param string $content Content after side_load_images process.
* @param int $post_id Post ID.
*/
$post['post_content'] = apply_filters( 'press_this_save_post_content', $post['post_content'], $post_id );
$updated = wp_update_post( $post, true );
if ( is_wp_error( $updated ) ) {
wp_send_json_error( array( 'errorMessage' => $updated->get_error_message() ) );
} else {
if ( isset( $post['post_format'] ) ) {
if ( current_theme_supports( 'post-formats', $post['post_format'] ) ) {
set_post_format( $post_id, $post['post_format'] );
} elseif ( $post['post_format'] ) {
set_post_format( $post_id, false );
}
}
$forceRedirect = false;
if ( 'publish' === get_post_status( $post_id ) ) {
$redirect = get_post_permalink( $post_id );
} elseif ( isset( $_POST['pt-force-redirect'] ) && $_POST['pt-force-redirect'] === 'true' ) {
$forceRedirect = true;
$redirect = get_edit_post_link( $post_id, 'js' );
} else {
$redirect = false;
}
/**
* Filter the URL to redirect to when Press This saves.
*
* @since 4.2.0
*
* @param string $url Redirect URL. If `$status` is 'publish', this will be the post permalink.
* Otherwise, the default is false resulting in no redirect.
* @param int $post_id Post ID.
* @param string $status Post status.
*/
$redirect = apply_filters( 'press_this_save_redirect', $redirect, $post_id, $post['post_status'] );
if ( $redirect ) {
wp_send_json_success( array( 'redirect' => $redirect, 'force' => $forceRedirect ) );
} else {
wp_send_json_success( array( 'postSaved' => true ) );
}
}
}
/**
* AJAX handler for adding a new category.
*
* @since 4.2.0
* @access public
*/
public function add_category() {
if ( false === wp_verify_nonce( $_POST['new_cat_nonce'], 'add-category' ) ) {
wp_send_json_error();
}
$taxonomy = get_taxonomy( 'category' );
if ( ! current_user_can( $taxonomy->cap->edit_terms ) || empty( $_POST['name'] ) ) {
wp_send_json_error();
}
$parent = isset( $_POST['parent'] ) && (int) $_POST['parent'] > 0 ? (int) $_POST['parent'] : 0;
$names = explode( ',', $_POST['name'] );
$added = $data = array();
foreach ( $names as $cat_name ) {
$cat_name = trim( $cat_name );
$cat_nicename = sanitize_title( $cat_name );
if ( empty( $cat_nicename ) ) {
continue;
}
// @todo Find a more performant way to check existence, maybe get_term() with a separate parent check.
if ( term_exists( $cat_name, $taxonomy->name, $parent ) ) {
if ( count( $names ) === 1 ) {
wp_send_json_error( array( 'errorMessage' => __( 'This category already exists.' ) ) );
} else {
continue;
}
}
$cat_id = wp_insert_term( $cat_name, $taxonomy->name, array( 'parent' => $parent ) );
if ( is_wp_error( $cat_id ) ) {
continue;
} elseif ( is_array( $cat_id ) ) {
$cat_id = $cat_id['term_id'];
}
$added[] = $cat_id;
}
if ( empty( $added ) ) {
wp_send_json_error( array( 'errorMessage' => __( 'This category cannot be added. Please change the name and try again.' ) ) );
}
foreach ( $added as $new_cat_id ) {
$new_cat = get_category( $new_cat_id );
if ( is_wp_error( $new_cat ) ) {
wp_send_json_error( array( 'errorMessage' => __( 'Error while adding the category. Please try again later.' ) ) );
}
$data[] = array(
'term_id' => $new_cat->term_id,
'name' => $new_cat->name,
'parent' => $new_cat->parent,
);
}
wp_send_json_success( $data );
}
/**
* Downloads the source's HTML via server-side call for the given URL.
*
* @since 4.2.0
* @access public
*
* @param string $url URL to scan.
* @return string Source's HTML sanitized markup
*/
public function fetch_source_html( $url ) {
global $wp_version;
if ( empty( $url ) ) {
return new WP_Error( 'invalid-url', __( 'A valid URL was not provided.' ) );
}
$remote_url = wp_safe_remote_get( $url, array(
'timeout' => 30,
// Use an explicit user-agent for Press This
'user-agent' => 'Press This (WordPress/' . $wp_version . '); ' . get_bloginfo( 'url' )
) );
if ( is_wp_error( $remote_url ) ) {
return $remote_url;
}
$useful_html_elements = array(
'img' => array(
'src' => true,
'width' => true,
'height' => true,
),
'iframe' => array(
'src' => true,
),
'link' => array(
'rel' => true,
'itemprop' => true,
'href' => true,
),
'meta' => array(
'property' => true,
'name' => true,
'content' => true,
)
);
/**
* Filter 'useful' HTML elements list for fetch source step.
*
* @since 4.5.0
*
* @param array $elements Default list of useful elements.
*/
$useful_html_elements = apply_filter( 'press_this_useful_html_elements', $useful_html_elements );
$source_content = wp_remote_retrieve_body( $remote_url );
$source_content = wp_kses( $source_content, $useful_html_elements );
return $source_content;
}
/**
* Utility method to limit an array to 50 values.
*
* @ignore
* @since 4.2.0
*
* @param array $value Array to limit.
* @return array Original array if fewer than 50 values, limited array, empty array otherwise.
*/
private function _limit_array( $value ) {
if ( is_array( $value ) ) {
if ( count( $value ) > 50 ) {
return array_slice( $value, 0, 50 );
}
return $value;
}
return array();
}
/**
* Utility method to limit the length of a given string to 5,000 characters.
*
* @ignore
* @since 4.2.0
*
* @param string $value String to limit.
* @return bool|int|string If boolean or integer, that value. If a string, the original value
* if fewer than 5,000 characters, a truncated version, otherwise an
* empty string.
*/
private function _limit_string( $value ) {
$return = '';
if ( is_numeric( $value ) || is_bool( $value ) ) {
$return = $value;
} else if ( is_string( $value ) ) {
if ( mb_strlen( $value ) > 5000 ) {
$return = mb_substr( $value, 0, 5000 );
} else {
$return = $value;
}
$return = html_entity_decode( $return, ENT_QUOTES, 'UTF-8' );
$return = sanitize_text_field( trim( $return ) );
}
return $return;
}
/**
* Utility method to limit a given URL to 2,048 characters.
*
* @ignore
* @since 4.2.0
*
* @param string $url URL to check for length and validity.
* @return string Escaped URL if of valid length (< 2048) and makeup. Empty string otherwise.
*/
private function _limit_url( $url ) {
if ( ! is_string( $url ) ) {
return '';
}
// HTTP 1.1 allows 8000 chars but the "de-facto" standard supported in all current browsers is 2048.
if ( strlen( $url ) > 2048 ) {
return ''; // Return empty rather than a truncated/invalid URL
}
// Does not look like an URL.
if ( ! preg_match( '/^([!#$&-;=?-\[\]_a-z~]|%[0-9a-fA-F]{2})+$/', $url ) ) {
return '';
}
// If the URL is root-relative, prepend the protocol and domain name
if ( $url && $this->domain && preg_match( '%^/[^/]+%', $url ) ) {
$url = $this->domain . $url;
}
// Not absolute or protocol-relative URL.
if ( ! preg_match( '%^(?:https?:)?//[^/]+%', $url ) ) {
return '';
}
return esc_url_raw( $url, array( 'http', 'https' ) );
}
/**
* Utility method to limit image source URLs.
*
* Excluded URLs include share-this type buttons, loaders, spinners, spacers, WordPress interface images,
* tiny buttons or thumbs, mathtag.com or quantserve.com images, or the WordPress.com stats gif.
*
* @ignore
* @since 4.2.0
*
* @param string $src Image source URL.
* @return string If not matched an excluded URL type, the original URL, empty string otherwise.
*/
private function _limit_img( $src ) {
$src = $this->_limit_url( $src );
if ( preg_match( '!/ad[sx]?/!i', $src ) ) {
// Ads
return '';
} else if ( preg_match( '!(/share-?this[^.]+?\.[a-z0-9]{3,4})(\?.*)?$!i', $src ) ) {
// Share-this type button
return '';
} else if ( preg_match( '!/(spinner|loading|spacer|blank|rss)\.(gif|jpg|png)!i', $src ) ) {
// Loaders, spinners, spacers
return '';
} else if ( preg_match( '!/([^./]+[-_])?(spinner|loading|spacer|blank)s?([-_][^./]+)?\.[a-z0-9]{3,4}!i', $src ) ) {
// Fancy loaders, spinners, spacers
return '';
} else if ( preg_match( '!([^./]+[-_])?thumb[^.]*\.(gif|jpg|png)$!i', $src ) ) {
// Thumbnails, too small, usually irrelevant to context
return '';
} else if ( false !== stripos( $src, '/wp-includes/' ) ) {
// Classic WordPress interface images
return '';
} else if ( preg_match( '![^\d]\d{1,2}x\d+\.(gif|jpg|png)$!i', $src ) ) {
// Most often tiny buttons/thumbs (< 100px wide)
return '';
} else if ( preg_match( '!/pixel\.(mathtag|quantserve)\.com!i', $src ) ) {
// See mathtag.com and https://www.quantcast.com/how-we-do-it/iab-standard-measurement/how-we-collect-data/
return '';
} else if ( preg_match( '!/[gb]\.gif(\?.+)?$!i', $src ) ) {
// WordPress.com stats gif
return '';
}
return $src;
}
/**
* Limit embed source URLs to specific providers.
*
* Not all core oEmbed providers are supported. Supported providers include YouTube, Vimeo,
* Vine, Daily Motion, SoundCloud, and Twitter.
*
* @ignore
* @since 4.2.0
*
* @param string $src Embed source URL.
* @return string If not from a supported provider, an empty string. Otherwise, a reformattd embed URL.
*/
private function _limit_embed( $src ) {
$src = $this->_limit_url( $src );
if ( empty( $src ) )
return '';
if ( preg_match( '!//(m|www)\.youtube\.com/(embed|v)/([^?]+)\?.+$!i', $src, $src_matches ) ) {
// Embedded Youtube videos (www or mobile)
$src = 'https://www.youtube.com/watch?v=' . $src_matches[3];
} else if ( preg_match( '!//player\.vimeo\.com/video/([\d]+)([?/].*)?$!i', $src, $src_matches ) ) {
// Embedded Vimeo iframe videos
$src = 'https://vimeo.com/' . (int) $src_matches[1];
} else if ( preg_match( '!//vimeo\.com/moogaloop\.swf\?clip_id=([\d]+)$!i', $src, $src_matches ) ) {
// Embedded Vimeo Flash videos
$src = 'https://vimeo.com/' . (int) $src_matches[1];
} else if ( preg_match( '!//vine\.co/v/([^/]+)/embed!i', $src, $src_matches ) ) {
// Embedded Vine videos
$src = 'https://vine.co/v/' . $src_matches[1];
} else if ( preg_match( '!//(www\.)?dailymotion\.com/embed/video/([^/?]+)([/?].+)?!i', $src, $src_matches ) ) {
// Embedded Daily Motion videos
$src = 'https://www.dailymotion.com/video/' . $src_matches[2];
} else {
require_once( ABSPATH . WPINC . '/class-oembed.php' );
$oembed = _wp_oembed_get_object();
if ( ! $oembed->get_provider( $src, array( 'discover' => false ) ) ) {
$src = '';
}
}
return $src;
}
/**
* Process a meta data entry from the source.
*
* @ignore
* @since 4.2.0
*
* @param string $meta_name Meta key name.
* @param mixed $meta_value Meta value.
* @param array $data Associative array of source data.
* @return array Processed data array.
*/
private function _process_meta_entry( $meta_name, $meta_value, $data ) {
if ( preg_match( '/:?(title|description|keywords|site_name)$/', $meta_name ) ) {
$data['_meta'][ $meta_name ] = $meta_value;
} else {
switch ( $meta_name ) {
case 'og:url':
case 'og:video':
case 'og:video:secure_url':
$meta_value = $this->_limit_embed( $meta_value );
if ( ! isset( $data['_embeds'] ) ) {
$data['_embeds'] = array();
}
if ( ! empty( $meta_value ) && ! in_array( $meta_value, $data['_embeds'] ) ) {
$data['_embeds'][] = $meta_value;
}
break;
case 'og:image':
case 'og:image:secure_url':
case 'twitter:image0:src':
case 'twitter:image0':
case 'twitter:image:src':
case 'twitter:image':
$meta_value = $this->_limit_img( $meta_value );
if ( ! isset( $data['_images'] ) ) {
$data['_images'] = array();
}
if ( ! empty( $meta_value ) && ! in_array( $meta_value, $data['_images'] ) ) {
$data['_images'][] = $meta_value;
}
break;
}
}
return $data;
}
/**
* Fetches and parses _meta, _images, and _links data from the source.
*
* @since 4.2.0
* @access public
*
* @param string $url URL to scan.
* @param array $data Optional. Existing data array if you have one. Default empty array.
* @return array New data array.
*/
public function source_data_fetch_fallback( $url, $data = array() ) {
if ( empty( $url ) ) {
return array();
}
// Download source page to tmp file.
$source_content = $this->fetch_source_html( $url );
if ( is_wp_error( $source_content ) ) {
return array( 'errors' => $source_content->get_error_messages() );
}
// Fetch and gather data first, so discovered media is offered 1st to user.
if ( empty( $data['_meta'] ) ) {
$data['_meta'] = array();
}
if ( preg_match_all( '/]+>/', $source_content, $matches ) ) {
$items = $this->_limit_array( $matches[0] );
foreach ( $items as $value ) {
if ( preg_match( '/(property|name)="([^"]+)"[^>]+content="([^"]+)"/', $value, $new_matches ) ) {
$meta_name = $this->_limit_string( $new_matches[2] );
$meta_value = $this->_limit_string( $new_matches[3] );
// Sanity check. $key is usually things like 'title', 'description', 'keywords', etc.
if ( strlen( $meta_name ) > 100 ) {
continue;
}
$data = $this->_process_meta_entry( $meta_name, $meta_value, $data );
}
}
}
// Fetch and gather ![]()
data.
if ( empty( $data['_images'] ) ) {
$data['_images'] = array();
}
if ( preg_match_all( '/![]()
]+>/', $source_content, $matches ) ) {
$items = $this->_limit_array( $matches[0] );
foreach ( $items as $value ) {
if ( ( preg_match( '/width=(\'|")(\d+)\\1/i', $value, $new_matches ) && $new_matches[2] < 256 ) ||
( preg_match( '/height=(\'|")(\d+)\\1/i', $value, $new_matches ) && $new_matches[2] < 128 ) ) {
continue;
}
if ( preg_match( '/src=(\'|")([^\'"]+)\\1/i', $value, $new_matches ) ) {
$src = $this->_limit_img( $new_matches[2] );
if ( ! empty( $src ) && ! in_array( $src, $data['_images'] ) ) {
$data['_images'][] = $src;
}
}
}
}
// Fetch and gather