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add "extractfeedurls" rpc action that extracts the feed URLs from a HTML page

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Christian Weiske 2010-11-07 15:45:50 +01:00 committed by Andrew Dolgov
parent f2c6c0088b
commit f0266f51ab
2 changed files with 56 additions and 7 deletions
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53
functions.php
View file

@ -2943,15 +2943,9 @@
function subscribe_to_feed($link, $url, $cat_id = 0,
$auth_login = '', $auth_pass = '') {
$url = fix_url($url);
$parts = parse_url($url);
$url = fix_url($url);
if (!validate_feed_url($url)) return 2;
if ($parts['scheme'] == 'feed') $parts['scheme'] = 'http';
$url = make_url_from_parts($parts);
if ($cat_id == "0" || !$cat_id) {
$cat_qpart = "NULL";
} else {
@ -6674,6 +6668,8 @@
/**
* Fixes incomplete URLs by prepending "http://".
* Also replaces feed:// with http://, and
* prepends a trailing slash if the url is a domain name only.
*
* @param string $url Possibly incomplete URL
*
@ -6682,6 +6678,14 @@
function fix_url($url) {
if (strpos($url, '://') === false) {
$url = 'http://' . $url;
} else if (substr($url, 0, 5) == 'feed:') {
$url = 'http:' . substr($url, 5);
}
//prepend slash if the URL has no slash in it
// "http://www.example" -> "http://www.example/"
if (strpos($url, '/', 7) === false) {
$url .= '/';
}
return $url;
}
@ -6973,4 +6977,39 @@
}
return false;
}
/**
* Extracts RSS/Atom feed URLs from the given HTML URL.
*
* @param string $url HTML page URL
*
* @return array Array of feeds. Key is the full URL, value the title
*/
function get_feeds_from_html($url)
{
$url = fix_url($url);
$baseUrl = substr($url, 0, strrpos($url, '/') + 1);
$doc = new DOMDocument();
$doc->loadHTMLFile($url);
$xpath = new DOMXPath($doc);
$entries = $xpath->query('/html/head/link[@rel="alternate"]');
$feedUrls = array();
foreach ($entries as $entry) {
if ($entry->hasAttribute('href')) {
$title = $entry->getAttribute('title');
if ($title == '') {
$title = $entry->getAttribute('type');
}
$feedUrl = $entry->getAttribute('href');
if (strpos($feedUrl, '://') === false) {
//no protocol -> relative URL
$feedUrl = $baseUrl . $feedUrl;
}
$feedUrls[$feedUrl] = $title;
}
}
return $feedUrls;
}
?>

10
modules/backend-rpc.php
View file

@ -123,6 +123,16 @@
}
if ($subop == "extractfeedurls") {
print "<rpc-reply>";
$urls = get_feeds_from_html($_REQUEST['url']);
print "<urls><![CDATA[" . json_encode($urls) . "]]></urls>";
print "</rpc-reply>";
return;
}
if ($subop == "togglepref") {
print "<rpc-reply>";