diff options
Diffstat (limited to 'plugins/FeedSub/feeddiscovery.php')
| -rw-r--r-- | plugins/FeedSub/feeddiscovery.php | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/plugins/FeedSub/feeddiscovery.php b/plugins/FeedSub/feeddiscovery.php deleted file mode 100644 index 35edaca33..000000000 --- a/plugins/FeedSub/feeddiscovery.php +++ /dev/null @@ -1,209 +0,0 @@ -<?php -/* - * StatusNet - the distributed open-source microblogging tool - * Copyright (C) 2009, StatusNet, Inc. - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -/** - * @package FeedSubPlugin - * @maintainer Brion Vibber <brion@status.net> - */ - -if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); } - -class FeedSubBadURLException extends FeedSubException -{ -} - -class FeedSubBadResponseException extends FeedSubException -{ -} - -class FeedSubEmptyException extends FeedSubException -{ -} - -class FeedSubBadHTMLException extends FeedSubException -{ -} - -class FeedSubUnrecognizedTypeException extends FeedSubException -{ -} - -class FeedSubNoFeedException extends FeedSubException -{ -} - -class FeedDiscovery -{ - public $uri; - public $type; - public $body; - - - public function feedMunger() - { - require_once 'XML/Feed/Parser.php'; - $feed = new XML_Feed_Parser($this->body, false, false, true); // @fixme - return new FeedMunger($feed, $this->uri); - } - - /** - * @param string $url - * @param bool $htmlOk - * @return string with validated URL - * @throws FeedSubBadURLException - * @throws FeedSubBadHtmlException - * @throws FeedSubNoFeedException - * @throws FeedSubEmptyException - * @throws FeedSubUnrecognizedTypeException - */ - function discoverFromURL($url, $htmlOk=true) - { - try { - $client = new HTTPClient(); - $response = $client->get($url); - } catch (HTTP_Request2_Exception $e) { - throw new FeedSubBadURLException($e); - } - - if ($htmlOk) { - $type = $response->getHeader('Content-Type'); - $isHtml = preg_match('!^(text/html|application/xhtml\+xml)!i', $type); - if ($isHtml) { - $target = $this->discoverFromHTML($response->getUrl(), $response->getBody()); - if (!$target) { - throw new FeedSubNoFeedException($url); - } - return $this->discoverFromURL($target, false); - } - } - - return $this->initFromResponse($response); - } - - function initFromResponse($response) - { - if (!$response->isOk()) { - throw new FeedSubBadResponseException($response->getCode()); - } - - $sourceurl = $response->getUrl(); - $body = $response->getBody(); - if (!$body) { - throw new FeedSubEmptyException($sourceurl); - } - - $type = $response->getHeader('Content-Type'); - if (preg_match('!^(text/xml|application/xml|application/(rss|atom)\+xml)!i', $type)) { - $this->uri = $sourceurl; - $this->type = $type; - $this->body = $body; - return true; - } else { - common_log(LOG_WARNING, "Unrecognized feed type $type for $sourceurl"); - throw new FeedSubUnrecognizedTypeException($type); - } - } - - /** - * @param string $url source URL, used to resolve relative links - * @param string $body HTML body text - * @return mixed string with URL or false if no target found - */ - function discoverFromHTML($url, $body) - { - // DOMDocument::loadHTML may throw warnings on unrecognized elements. - $old = error_reporting(error_reporting() & ~E_WARNING); - $dom = new DOMDocument(); - $ok = $dom->loadHTML($body); - error_reporting($old); - - if (!$ok) { - throw new FeedSubBadHtmlException(); - } - - // Autodiscovery links may be relative to the page's URL or <base href> - $base = false; - $nodes = $dom->getElementsByTagName('base'); - for ($i = 0; $i < $nodes->length; $i++) { - $node = $nodes->item($i); - if ($node->hasAttributes()) { - $href = $node->attributes->getNamedItem('href'); - if ($href) { - $base = trim($href->value); - } - } - } - if ($base) { - $base = $this->resolveURI($base, $url); - } else { - $base = $url; - } - - // Ok... now on to the links! - // @fixme merge with the munger link checks - $nodes = $dom->getElementsByTagName('link'); - for ($i = 0; $i < $nodes->length; $i++) { - $node = $nodes->item($i); - if ($node->hasAttributes()) { - $rel = $node->attributes->getNamedItem('rel'); - $type = $node->attributes->getNamedItem('type'); - $href = $node->attributes->getNamedItem('href'); - if ($rel && $type && $href) { - $rel = trim($rel->value); - $type = trim($type->value); - $href = trim($href->value); - - $feedTypes = array( - 'application/rss+xml', - 'application/atom+xml', - ); - if (trim($rel) == 'alternate' && in_array($type, $feedTypes)) { - return $this->resolveURI($href, $base); - } - } - } - } - - return false; - } - - /** - * Resolve a possibly relative URL against some absolute base URL - * @param string $rel relative or absolute URL - * @param string $base absolute URL - * @return string absolute URL, or original URL if could not be resolved. - */ - function resolveURI($rel, $base) - { - require_once "Net/URL2.php"; - try { - $relUrl = new Net_URL2($rel); - if ($relUrl->isAbsolute()) { - return $rel; - } - $baseUrl = new Net_URL2($base); - $absUrl = $baseUrl->resolve($relUrl); - return $absUrl->getURL(); - } catch (Exception $e) { - common_log(LOG_WARNING, 'Unable to resolve relative link "' . - $rel . '" against base "' . $base . '": ' . $e->getMessage()); - return $rel; - } - } -} |