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-rw-r--r--plugins/OStatus/lib/feeddiscovery.php221
-rw-r--r--plugins/OStatus/lib/feedmunger.php270
-rw-r--r--plugins/OStatus/lib/hubdistribqueuehandler.php87
-rw-r--r--plugins/OStatus/lib/huboutqueuehandler.php52
-rw-r--r--plugins/OStatus/lib/hubverifyqueuehandler.php53
5 files changed, 683 insertions, 0 deletions
diff --git a/plugins/OStatus/lib/feeddiscovery.php b/plugins/OStatus/lib/feeddiscovery.php
new file mode 100644
index 000000000..9bc7892fb
--- /dev/null
+++ b/plugins/OStatus/lib/feeddiscovery.php
@@ -0,0 +1,221 @@
+<?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
+{
+}
+
+/**
+ * Given a web page or feed URL, discover the final location of the feed
+ * and return its current contents.
+ *
+ * @example
+ * $feed = new FeedDiscovery();
+ * if ($feed->discoverFromURL($url)) {
+ * print $feed->uri;
+ * print $feed->type;
+ * processFeed($feed->body);
+ * }
+ */
+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 $htmlOk pass false here if you don't want to follow web pages.
+ * @return string with validated URL
+ * @throws FeedSubBadURLException
+ * @throws FeedSubBadHtmlException
+ * @throws FeedSubNoFeedException
+ * @throws FeedSubEmptyException
+ * @throws FeedSubUnrecognizedTypeException
+ */
+ function discoverFromURL($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;
+ }
+ }
+}
diff --git a/plugins/OStatus/lib/feedmunger.php b/plugins/OStatus/lib/feedmunger.php
new file mode 100644
index 000000000..eeb8d2df3
--- /dev/null
+++ b/plugins/OStatus/lib/feedmunger.php
@@ -0,0 +1,270 @@
+<?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 FeedSubPreviewNotice extends Notice
+{
+ protected $fetched = true;
+
+ function __construct($profile)
+ {
+ $this->profile = $profile;
+ $this->profile_id = 0;
+ }
+
+ function getProfile()
+ {
+ return $this->profile;
+ }
+
+ function find()
+ {
+ return true;
+ }
+
+ function fetch()
+ {
+ $got = $this->fetched;
+ $this->fetched = false;
+ return $got;
+ }
+}
+
+class FeedSubPreviewProfile extends Profile
+{
+ function getAvatar($width, $height=null)
+ {
+ return new FeedSubPreviewAvatar($width, $height, $this->avatar);
+ }
+}
+
+class FeedSubPreviewAvatar extends Avatar
+{
+ function __construct($width, $height, $remote)
+ {
+ $this->remoteImage = $remote;
+ }
+
+ function displayUrl() {
+ return $this->remoteImage;
+ }
+}
+
+class FeedMunger
+{
+ /**
+ * @param XML_Feed_Parser $feed
+ */
+ function __construct($feed, $url=null)
+ {
+ $this->feed = $feed;
+ $this->url = $url;
+ }
+
+ function feedinfo()
+ {
+ $feedinfo = new Feedinfo();
+ $feedinfo->feeduri = $this->url;
+ $feedinfo->homeuri = $this->feed->link;
+ $feedinfo->huburi = $this->getHubLink();
+ return $feedinfo;
+ }
+
+ function getAtomLink($item, $attribs=array())
+ {
+ // XML_Feed_Parser gets confused by multiple <link> elements.
+ $dom = $item->model;
+
+ // Note that RSS feeds would embed an <atom:link> so this should work for both.
+ /// http://code.google.com/p/pubsubhubbub/wiki/RssFeeds
+ // <link rel='hub' href='http://pubsubhubbub.appspot.com/'/>
+ $links = $dom->getElementsByTagNameNS('http://www.w3.org/2005/Atom', 'link');
+ for ($i = 0; $i < $links->length; $i++) {
+ $node = $links->item($i);
+ if ($node->hasAttributes()) {
+ $href = $node->attributes->getNamedItem('href');
+ if ($href) {
+ $matches = 0;
+ foreach ($attribs as $name => $val) {
+ $attrib = $node->attributes->getNamedItem($name);
+ if ($attrib && $attrib->value == $val) {
+ $matches++;
+ }
+ }
+ if ($matches == count($attribs)) {
+ return $href->value;
+ }
+ }
+ }
+ }
+ return false;
+ }
+
+ function getRssLink($item)
+ {
+ // XML_Feed_Parser gets confused by multiple <link> elements.
+ $dom = $item->model;
+
+ // Note that RSS feeds would embed an <atom:link> so this should work for both.
+ /// http://code.google.com/p/pubsubhubbub/wiki/RssFeeds
+ // <link rel='hub' href='http://pubsubhubbub.appspot.com/'/>
+ $links = $dom->getElementsByTagName('link');
+ for ($i = 0; $i < $links->length; $i++) {
+ $node = $links->item($i);
+ if (!$node->hasAttributes()) {
+ return $node->textContent;
+ }
+ }
+ return false;
+ }
+
+ function getAltLink($item)
+ {
+ // Check for an atom link...
+ $link = $this->getAtomLink($item, array('rel' => 'alternate', 'type' => 'text/html'));
+ if (!$link) {
+ $link = $this->getRssLink($item);
+ }
+ return $link;
+ }
+
+ function getHubLink()
+ {
+ return $this->getAtomLink($this->feed, array('rel' => 'hub'));
+ }
+
+ /**
+ * Get an appropriate avatar image source URL, if available.
+ * @return mixed string or false
+ */
+ function getAvatar()
+ {
+ $logo = $this->feed->logo;
+ if ($logo) {
+ return $logo;
+ }
+ $icon = $this->feed->icon;
+ if ($icon) {
+ return $icon;
+ }
+ return common_path('plugins/OStatus/images/48px-Feed-icon.svg.png');
+ }
+
+ function profile($preview=false)
+ {
+ if ($preview) {
+ $profile = new FeedSubPreviewProfile();
+ } else {
+ $profile = new Profile();
+ }
+
+ // @todo validate/normalize nick?
+ $profile->nickname = $this->feed->title;
+ $profile->fullname = $this->feed->title;
+ $profile->homepage = $this->getAltLink($this->feed);
+ $profile->bio = $this->feed->description;
+ $profile->profileurl = $this->getAltLink($this->feed);
+
+ if ($preview) {
+ $profile->avatar = $this->getAvatar();
+ }
+
+ // @todo tags from categories
+ // @todo lat/lon/location?
+
+ return $profile;
+ }
+
+ function notice($index=1, $preview=false)
+ {
+ $entry = $this->feed->getEntryByOffset($index);
+ if (!$entry) {
+ return null;
+ }
+
+ if ($preview) {
+ $notice = new FeedSubPreviewNotice($this->profile(true));
+ $notice->id = -1;
+ } else {
+ $notice = new Notice();
+ }
+
+ $link = $this->getAltLink($entry);
+ if (empty($link)) {
+ if (preg_match('!^https?://!', $entry->id)) {
+ $link = $entry->id;
+ common_log(LOG_DEBUG, "No link on entry, using URL from id: $link");
+ }
+ }
+ $notice->uri = $link;
+ $notice->url = $link;
+ $notice->content = $this->noticeFromEntry($entry);
+ $notice->rendered = common_render_content($notice->content, $notice);
+ $notice->created = common_sql_date($entry->updated); // @fixme
+ $notice->is_local = Notice::GATEWAY;
+ $notice->source = 'feed';
+
+ return $notice;
+ }
+
+ /**
+ * @param XML_Feed_Type $entry
+ * @return string notice text, within post size limit
+ */
+ function noticeFromEntry($entry)
+ {
+ $title = $entry->title;
+ $link = $entry->link;
+
+ // @todo We can get <category> entries like this:
+ // $cats = $entry->getCategory('category', array(0, true));
+ // but it feels like an awful hack. If it's accessible cleanly,
+ // try adding #hashtags from the categories/tags on a post.
+
+ // @todo Should we force a language here?
+ $format = _m('New post: "%1$s" %2$s');
+ $title = $entry->title;
+ $link = $this->getAltLink($entry);
+ $out = sprintf($format, $title, $link);
+
+ // Trim link if needed...
+ $max = Notice::maxContent();
+ if (mb_strlen($out) > $max) {
+ $link = common_shorten_url($link);
+ $out = sprintf($format, $title, $link);
+ }
+
+ // Trim title if needed...
+ if (mb_strlen($out) > $max) {
+ $ellipsis = "\xe2\x80\xa6"; // U+2026 HORIZONTAL ELLIPSIS
+ $used = mb_strlen($out) - mb_strlen($title);
+ $available = $max - $used - mb_strlen($ellipsis);
+ $title = mb_substr($title, 0, $available) . $ellipsis;
+ $out = sprintf($format, $title, $link);
+ }
+
+ return $out;
+ }
+}
diff --git a/plugins/OStatus/lib/hubdistribqueuehandler.php b/plugins/OStatus/lib/hubdistribqueuehandler.php
new file mode 100644
index 000000000..126f1355f
--- /dev/null
+++ b/plugins/OStatus/lib/hubdistribqueuehandler.php
@@ -0,0 +1,87 @@
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Send a PuSH subscription verification from our internal hub.
+ * Queue up final distribution for
+ * @package Hub
+ * @author Brion Vibber <brion@status.net>
+ */
+class HubDistribQueueHandler extends QueueHandler
+{
+ function transport()
+ {
+ return 'hubdistrib';
+ }
+
+ function handle($notice)
+ {
+ assert($notice instanceof Notice);
+
+ // See if there's any PuSH subscriptions, including OStatus clients.
+ // @fixme handle group subscriptions as well
+ // http://identi.ca/api/statuses/user_timeline/1.atom
+ $feed = common_local_url('ApiTimelineUser',
+ array('id' => $notice->profile_id,
+ 'format' => 'atom'));
+ $sub = new HubSub();
+ $sub->topic = $feed;
+ if ($sub->find()) {
+ common_log(LOG_INFO, "Preparing $sub->N PuSH distribution(s) for $feed");
+ $qm = QueueManager::get();
+ $atom = $this->userFeedForNotice($notice);
+ while ($sub->fetch()) {
+ common_log(LOG_INFO, "Prepping PuSH distribution to $sub->callback for $feed");
+ $data = array('sub' => clone($sub),
+ 'atom' => $atom);
+ $qm->enqueue($data, 'hubout');
+ }
+ } else {
+ common_log(LOG_INFO, "No PuSH subscribers for $feed");
+ }
+ }
+
+ /**
+ * Build a single-item version of the sending user's Atom feed.
+ * @param Notice $notice
+ * @return string
+ */
+ function userFeedForNotice($notice)
+ {
+ // @fixme this feels VERY hacky...
+ // should probably be a cleaner way to do it
+
+ ob_start();
+ $api = new ApiTimelineUserAction();
+ $api->prepare(array('id' => $notice->profile_id,
+ 'format' => 'atom',
+ 'max_id' => $notice->id,
+ 'since_id' => $notice->id - 1));
+ $api->showTimeline();
+ $feed = ob_get_clean();
+
+ // ...and override the content-type back to something normal... eww!
+ // hope there's no other headers that got set while we weren't looking.
+ header('Content-Type: text/html; charset=utf-8');
+
+ common_log(LOG_DEBUG, $feed);
+ return $feed;
+ }
+}
+
diff --git a/plugins/OStatus/lib/huboutqueuehandler.php b/plugins/OStatus/lib/huboutqueuehandler.php
new file mode 100644
index 000000000..cb44ad2c4
--- /dev/null
+++ b/plugins/OStatus/lib/huboutqueuehandler.php
@@ -0,0 +1,52 @@
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Send a raw PuSH atom update from our internal hub.
+ * @package Hub
+ * @author Brion Vibber <brion@status.net>
+ */
+class HubOutQueueHandler extends QueueHandler
+{
+ function transport()
+ {
+ return 'hubout';
+ }
+
+ function handle($data)
+ {
+ $sub = $data['sub'];
+ $atom = $data['atom'];
+
+ assert($sub instanceof HubSub);
+ assert(is_string($atom));
+
+ try {
+ $sub->push($atom);
+ } catch (Exception $e) {
+ common_log(LOG_ERR, "Failed PuSH to $sub->callback for $sub->topic: " .
+ $e->getMessage());
+ // @fixme Reschedule a later delivery?
+ // Currently we have no way to do this other than 'send NOW'
+ }
+
+ return true;
+ }
+}
+
diff --git a/plugins/OStatus/lib/hubverifyqueuehandler.php b/plugins/OStatus/lib/hubverifyqueuehandler.php
new file mode 100644
index 000000000..125d13a77
--- /dev/null
+++ b/plugins/OStatus/lib/hubverifyqueuehandler.php
@@ -0,0 +1,53 @@
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Send a PuSH subscription verification from our internal hub.
+ * @package Hub
+ * @author Brion Vibber <brion@status.net>
+ */
+class HubVerifyQueueHandler extends QueueHandler
+{
+ function transport()
+ {
+ return 'hubverify';
+ }
+
+ function handle($data)
+ {
+ $sub = $data['sub'];
+ $mode = $data['mode'];
+
+ assert($sub instanceof HubSub);
+ assert($mode === 'subscribe' || $mode === 'unsubscribe');
+
+ common_log(LOG_INFO, __METHOD__ . ": $mode $sub->callback $sub->topic");
+ try {
+ $sub->verify($mode);
+ } catch (Exception $e) {
+ common_log(LOG_ERR, "Failed PuSH $mode verify to $sub->callback for $sub->topic: " .
+ $e->getMessage());
+ // @fixme schedule retry?
+ // @fixme just kill it?
+ }
+
+ return true;
+ }
+}
+
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-19 07:05:43 +0000