mirror of
https://github.com/RSS-Bridge/rss-bridge.git
synced 2024-11-25 02:46:15 +03:00
dc199ebf5c
This commit addresses a bug where the $time variable is not set from the innertext of the $time_element when the datetime attribute is not found. The previous implementation only checked if $time was null or an empty string, which did not cover all cases where the datetime attribute might be missing. By using the empty() function, we ensure that $time is correctly set from the innertext when the datetime attribute is not present.
462 lines
17 KiB
PHP
462 lines
17 KiB
PHP
<?php
|
|
|
|
class CssSelectorComplexBridge extends BridgeAbstract
|
|
{
|
|
const MAINTAINER = 'Lars Stegman';
|
|
const NAME = 'CSS Selector Complex Bridge';
|
|
const URI = 'https://github.com/RSS-Bridge/rss-bridge/';
|
|
const DESCRIPTION = <<<EOT
|
|
Convert any site to RSS feed using CSS selectors (Advanced Users). The bridge first selects
|
|
the element describing the article entries. It then extracts the links to the articles from
|
|
these elements. It then, depending on the setting "Load article from page", either parses
|
|
the selected elements, or downloads the page for each article and parses those. Parsing the
|
|
elements or page is done using the provided selectors.
|
|
EOT;
|
|
const PARAMETERS = [
|
|
[
|
|
'home_page' => [
|
|
'name' => 'Site URL: Page with latest articles',
|
|
'exampleValue' => 'https://example.com/blog/',
|
|
'required' => true
|
|
],
|
|
'cookie' => [
|
|
'name' => '[Optional] Cookie',
|
|
'title' => <<<EOT
|
|
Use when the website does not send the page contents, unless a static cookie is included.
|
|
EOT,
|
|
'exampleValue' => 'sessionId=deadb33f'
|
|
],
|
|
'title_cleanup' => [
|
|
'name' => '[Optional] Text to remove from feed title',
|
|
'title' => <<<EOT
|
|
Text to remove from the feed title, which is read from the article list page.
|
|
EOT,
|
|
'exampleValue' => ' | BlogName',
|
|
],
|
|
'entry_element_selector' => [
|
|
'name' => 'Selector for article entry elements',
|
|
'title' => <<<EOT
|
|
This bridge works using CSS selectors, e.g. "div.article" will match all
|
|
<div class="article">...</div> on home page, each one being treated as a feed item.
|
|
|
|
Use the URL selector option to select the `a` element with the
|
|
`href` to the article link. If this option is not configured, the first encountered
|
|
`a` element is used.
|
|
EOT,
|
|
'exampleValue' => 'div.article',
|
|
'required' => true
|
|
],
|
|
'url_selector' => [
|
|
'name' => '[Optional] Selector for link elements',
|
|
'title' => <<<EOT
|
|
The selector to find `a` elements in the entry element. If empty,
|
|
the first encountered `a` element is used. The `href` property
|
|
is used to create entries in the feed.
|
|
EOT,
|
|
'exampleValue' => 'a.article',
|
|
'defaultValue' => 'a'
|
|
],
|
|
'url_pattern' => [
|
|
'name' => '[Optional] Pattern for site URLs to keep in feed',
|
|
'title' => 'Optionally filter items by applying a regular expression on their URL',
|
|
'exampleValue' => '/blog/article/.*',
|
|
],
|
|
'limit' => self::LIMIT,
|
|
'use_article_pages' => [
|
|
'name' => 'Load article from page',
|
|
'title' => <<<EOT
|
|
If true, the article page is load and parsed to get the article contents using
|
|
the css selectors. (Slower!)
|
|
Otherwise, the element selected by the article entry selector is used.
|
|
EOT,
|
|
'type' => 'checkbox'
|
|
],
|
|
'article_page_content_selector' => [
|
|
'name' => '[Optional] Selector to select article element',
|
|
'title' => 'Extract the article from its page using the provided selector',
|
|
'exampleValue' => 'article.content',
|
|
],
|
|
'content_cleanup' => [
|
|
'name' => '[Optional] Content cleanup: selector for items to remove',
|
|
'title' => 'Selector for unnecessary elements to remove inside article contents.',
|
|
'exampleValue' => 'div.ads, div.comments',
|
|
],
|
|
'title_selector' => [
|
|
'name' => '[Optional] Selector for the article title',
|
|
'title' => 'Selector to select the article title',
|
|
'defaultValue' => 'h1'
|
|
],
|
|
'category_selector' => [
|
|
'name' => '[Optional] Categories',
|
|
'title' => <<<EOT
|
|
Selector to extract the catgories the article has
|
|
EOT,
|
|
'exampleValue' => 'span.category, #main-category'
|
|
],
|
|
'author_selector' => [
|
|
'name' => '[Optional] Author',
|
|
'title' => <<<EOT
|
|
Selector to extract the author of the article. If multiple elements are selected
|
|
the first one is used.
|
|
EOT,
|
|
'exampleValue' => 'span#author'
|
|
],
|
|
'time_selector' => [
|
|
'name' => '[Optional] Time selector',
|
|
'title' => <<<EOT
|
|
Selector to extract the timestamp of the article. If the element
|
|
is an html5 `time` element, the value for the `datetime` attribute is used.
|
|
EOT,
|
|
],
|
|
'time_format' => [
|
|
'name' => '[Optional] Format string for parsing time',
|
|
'title' => <<<EOT
|
|
The format to use to parse the timestamp. See
|
|
https://www.php.net/manual/en/datetimeimmutable.createfromformat.php
|
|
for the format specification.
|
|
EOT
|
|
],
|
|
'remove_styling' => [
|
|
'name' => '[Optional] Remove styling',
|
|
'title' => 'Remove class and style attributes from the page elements',
|
|
'type' => 'checkbox'
|
|
]
|
|
]
|
|
];
|
|
|
|
private $feedName = '';
|
|
|
|
public function getURI()
|
|
{
|
|
$url = $this->getInput('home_page');
|
|
if (empty($url)) {
|
|
$url = parent::getURI();
|
|
}
|
|
return $url;
|
|
}
|
|
|
|
public function getName()
|
|
{
|
|
if (!empty($this->feedName)) {
|
|
return $this->feedName;
|
|
}
|
|
return parent::getName();
|
|
}
|
|
|
|
protected function getHeaders()
|
|
{
|
|
$headers = [];
|
|
$cookie = $this->getInput('cookie');
|
|
if (!empty($cookie)) {
|
|
$headers[] = 'Cookie: ' . $cookie;
|
|
}
|
|
|
|
return $headers;
|
|
}
|
|
|
|
public function collectData()
|
|
{
|
|
$url = $this->getInput('home_page');
|
|
$headers = $this->getHeaders();
|
|
|
|
$entry_element_selector = $this->getInput('entry_element_selector');
|
|
$url_selector = $this->getInput('url_selector');
|
|
$url_pattern = $this->getInput('url_pattern');
|
|
$limit = $this->getInput('limit') ?? 10;
|
|
|
|
$use_article_pages = $this->getInput('use_article_pages');
|
|
$article_page_content_selector = $this->getInput('article_page_content_selector');
|
|
$content_cleanup = $this->getInput('content_cleanup');
|
|
$title_selector = $this->getInput('title_selector');
|
|
$title_cleanup = $this->getInput('title_cleanup');
|
|
$time_selector = $this->getInput('time_selector');
|
|
$time_format = $this->getInput('time_format');
|
|
|
|
$category_selector = $this->getInput('category_selector');
|
|
$author_selector = $this->getInput('author_selector');
|
|
$remove_styling = $this->getInput('remove_styling');
|
|
|
|
$html = defaultLinkTo(getSimpleHTMLDOM($url, $headers), $url);
|
|
$this->feedName = $this->getTitle($html, $title_cleanup);
|
|
$entry_elements = $this->htmlFindEntryElements($html, $entry_element_selector, $url_selector, $url_pattern, $limit);
|
|
|
|
if (empty($entry_elements)) {
|
|
return;
|
|
}
|
|
|
|
// Fetch the elements from the article pages.
|
|
if ($use_article_pages) {
|
|
if (empty($article_page_content_selector)) {
|
|
returnClientError('`Article selector` is required when `Load article page` is enabled');
|
|
}
|
|
|
|
foreach (array_keys($entry_elements) as $uri) {
|
|
$entry_elements[$uri] = $this->fetchArticleElementFromPage($uri, $article_page_content_selector);
|
|
}
|
|
}
|
|
|
|
foreach ($entry_elements as $uri => $element) {
|
|
$entry = $this->parseEntryElement(
|
|
$element,
|
|
$title_selector,
|
|
$author_selector,
|
|
$category_selector,
|
|
$time_selector,
|
|
$time_format,
|
|
$content_cleanup,
|
|
$this->feedName,
|
|
$remove_styling
|
|
);
|
|
|
|
$entry['uri'] = $uri;
|
|
$this->items[] = $entry;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Filter a list of URLs using a pattern and limit
|
|
* @param array $links List of URLs
|
|
* @param string $url_pattern Pattern to look for in URLs
|
|
* @param int $limit Optional maximum amount of URLs to return
|
|
* @return array Array of URLs
|
|
*/
|
|
protected function filterUrlList($links, $url_pattern, $limit = 0)
|
|
{
|
|
if (!empty($url_pattern)) {
|
|
$url_pattern = '/' . str_replace('/', '\/', $url_pattern) . '/';
|
|
$links = array_filter($links, function ($url) use ($url_pattern) {
|
|
return preg_match($url_pattern, $url) === 1;
|
|
});
|
|
}
|
|
|
|
if ($limit > 0 && count($links) > $limit) {
|
|
$links = array_slice($links, 0, $limit);
|
|
}
|
|
|
|
return $links;
|
|
}
|
|
|
|
/**
|
|
* Retrieve title from webpage URL or DOM
|
|
* @param string|object $page URL or DOM to retrieve title from
|
|
* @param string $title_cleanup optional string to remove from webpage title, e.g. " | BlogName"
|
|
* @return string Webpage title
|
|
*/
|
|
protected function getTitle($page, $title_cleanup)
|
|
{
|
|
if (is_string($page)) {
|
|
$page = getSimpleHTMLDOMCached($page, 86400, $this->getHeaders());
|
|
}
|
|
$title = html_entity_decode($page->find('title', 0)->plaintext);
|
|
if (!empty($title)) {
|
|
$title = trim(str_replace($title_cleanup, '', $title));
|
|
}
|
|
|
|
return $title;
|
|
}
|
|
|
|
/**
|
|
* Remove all elements from HTML content matching cleanup selector
|
|
* @param string|object $content HTML content as HTML object or string
|
|
* @return string|object Cleaned content (same type as input)
|
|
*/
|
|
protected function cleanArticleContent($content, $cleanup_selector, $remove_styling)
|
|
{
|
|
$string_convert = false;
|
|
if (is_string($content)) {
|
|
$string_convert = true;
|
|
$content = str_get_html($content);
|
|
}
|
|
|
|
if (!empty($cleanup_selector)) {
|
|
foreach ($content->find($cleanup_selector) as $item_to_clean) {
|
|
$item_to_clean->outertext = '';
|
|
}
|
|
}
|
|
|
|
if ($remove_styling) {
|
|
foreach (['class', 'style'] as $attribute_to_remove) {
|
|
foreach ($content->find('[' . $attribute_to_remove . ']') as $item_to_clean) {
|
|
$item_to_clean->removeAttribute($attribute_to_remove);
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($string_convert) {
|
|
$content = $content->outertext;
|
|
}
|
|
return $content;
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrieve first N link+element from webpage URL or DOM satisfying the specified criteria
|
|
* @param string|object $page URL or DOM to retrieve feed items from
|
|
* @param string $entry_selector DOM selector for matching HTML elements that contain article
|
|
* entries
|
|
* @param string $url_selector DOM selector for matching links
|
|
* @param string $url_pattern Optional filter to keep only links matching the pattern
|
|
* @param int $limit Optional maximum amount of URLs to return
|
|
* @return array of items { <uri> => <html-element> }
|
|
*/
|
|
protected function htmlFindEntryElements($page, $entry_selector, $url_selector, $url_pattern = '', $limit = 0)
|
|
{
|
|
if (is_string($page)) {
|
|
$page = getSimpleHTMLDOM($page, $this->getHeaders());
|
|
}
|
|
|
|
$entryElements = $page->find($entry_selector);
|
|
if (empty($entryElements)) {
|
|
returnClientError('No entry elements for entry selector');
|
|
}
|
|
|
|
// Extract URIs with the associated entry element
|
|
$links_with_elements = [];
|
|
foreach ($entryElements as $entry) {
|
|
$url_element = $entry->find($url_selector, 0);
|
|
if (is_null($url_element)) {
|
|
// No `a` element found in this entry
|
|
if ($entry->tag == 'a') {
|
|
$url_element = $entry;
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
$links_with_elements[$url_element->href] = $entry;
|
|
}
|
|
|
|
if (empty($links_with_elements)) {
|
|
returnClientError('The provided URL selector matches some elements, but they do not
|
|
contain links.');
|
|
}
|
|
|
|
// Filter using the URL pattern
|
|
$filtered_urls = $this->filterUrlList(array_keys($links_with_elements), $url_pattern, $limit);
|
|
|
|
if (empty($filtered_urls)) {
|
|
returnClientError('No results for URL pattern');
|
|
}
|
|
|
|
$items = [];
|
|
foreach ($filtered_urls as $link) {
|
|
$items[$link] = $links_with_elements[$link];
|
|
}
|
|
|
|
return $items;
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrieve article element from its URL using content selector and return the DOM element
|
|
* @param string $entry_url URL to retrieve article from
|
|
* @param string $content_selector HTML selector for extracting content, e.g. "article.content"
|
|
* @return article DOM element
|
|
*/
|
|
protected function fetchArticleElementFromPage($entry_url, $content_selector)
|
|
{
|
|
$entry_html = getSimpleHTMLDOMCached($entry_url, 86400, $this->getHeaders());
|
|
$article_content = $entry_html->find($content_selector, 0);
|
|
|
|
if (is_null($article_content)) {
|
|
returnClientError('Could not get article content at URL: ' . $entry_url);
|
|
}
|
|
|
|
$article_content = defaultLinkTo($article_content, $entry_url);
|
|
return $article_content;
|
|
}
|
|
|
|
protected function parseTimeStrAsTimestamp($timeStr, $format)
|
|
{
|
|
$date = date_parse_from_format($format, $timeStr);
|
|
if ($date['error_count'] != 0) {
|
|
returnClientError('Error while parsing time string');
|
|
}
|
|
|
|
$timestamp = mktime(
|
|
$date['hour'],
|
|
$date['minute'],
|
|
$date['second'],
|
|
$date['month'],
|
|
$date['day'],
|
|
$date['year']
|
|
);
|
|
|
|
if ($timestamp == false) {
|
|
returnClientError('Error while creating timestamp');
|
|
}
|
|
|
|
return $timestamp;
|
|
}
|
|
|
|
/**
|
|
* Retrieve article content from its URL using content selector and return a feed item
|
|
* @param object $entry_html A DOM element containing the article
|
|
* @param string $title_selector A selector to the article title from the article
|
|
* @param string $author_selector A selector to find the article author
|
|
* @param string $time_selector A selector to get the article publication time.
|
|
* @param string $time_format The format to parse the time_selector.
|
|
* @param string $content_cleanup Optional selector for removing elements, e.g. "div.ads,
|
|
* div.comments"
|
|
* @param string $title_default Optional title to use when could not extract title reliably
|
|
* @param bool $remove_styling Whether to remove class and style attributes from the HTML
|
|
* @return array Entry data: uri, title, content
|
|
*/
|
|
protected function parseEntryElement(
|
|
$entry_html,
|
|
$title_selector = null,
|
|
$author_selector = null,
|
|
$category_selector = null,
|
|
$time_selector = null,
|
|
$time_format = null,
|
|
$content_cleanup = null,
|
|
$title_default = null,
|
|
$remove_styling = false
|
|
) {
|
|
$article_content = convertLazyLoading($entry_html);
|
|
|
|
$article_title = '';
|
|
if (is_null($title_selector)) {
|
|
$article_title = $title_default;
|
|
} else {
|
|
$titleElement = $entry_html->find($title_selector, 0);
|
|
if ($titleElement) {
|
|
$article_title = trim($titleElement->innertext);
|
|
}
|
|
}
|
|
|
|
$author = null;
|
|
if (!is_null($author_selector) && $author_selector != '') {
|
|
$author = trim($entry_html->find($author_selector, 0)->innertext);
|
|
}
|
|
|
|
$categories = [];
|
|
if (!is_null($category_selector && $category_selector != '')) {
|
|
$category_elements = $entry_html->find($category_selector);
|
|
foreach ($category_elements as $category_element) {
|
|
$categories[] = trim($category_element->innertext);
|
|
}
|
|
}
|
|
|
|
$time = null;
|
|
if (!is_null($time_selector) && $time_selector != '') {
|
|
$time_element = $entry_html->find($time_selector, 0);
|
|
$time = $time_element->getAttribute('datetime');
|
|
if (empty($time)) {
|
|
$time = $time_element->innertext;
|
|
}
|
|
|
|
$this->parseTimeStrAsTimestamp($time, $time_format);
|
|
}
|
|
|
|
$article_content = $this->cleanArticleContent($article_content, $content_cleanup, $remove_styling);
|
|
|
|
$item = [];
|
|
$item['title'] = $article_title;
|
|
$item['content'] = $article_content;
|
|
$item['categories'] = $categories;
|
|
$item['timestamp'] = $time;
|
|
$item['author'] = $author;
|
|
return $item;
|
|
}
|
|
}
|