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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, 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/>.
*/
if (!defined('LACONICA')) { exit(1); }
require_once(INSTALLDIR.'/lib/omb.php');
require_once('Auth/Yadis/Yadis.php');
class FinishremotesubscribeAction extends Action {
function handle($args) {
parent::handle($args);
if (common_logged_in()) {
common_user_error(_t('You can use the local subscription!'));
return;
}
$omb = $_SESSION['oauth_authorization_request'];
if (!$omb) {
common_user_error(_t('Not expecting this response!'));
return;
}
$req = OAuthRequest::from_request();
$token = $req->get_parameter('oauth_token');
# I think this is the success metric
if ($token != $omb['token']) {
common_user_error(_t('Not authorized.'));
return;
}
$version = $req->get_parameter('omb_version');
if ($version != OMB_VERSION_01) {
common_user_error(_t('Unknown version of OMB protocol.'));
return;
}
$nickname = $req->get_parameter('omb_listener_nickname');
if (!$nickname) {
common_user_error(_t('No nickname provided by remote server.'));
return;
}
$profile_url = $req->get_parameter('omb_listener_profile');
if (!$profile_url) {
common_user_error(_t('No profile URL returned by server.'));
return;
}
if (!Validate::uri($profile_url, array('allowed_schemes' => array('http', 'https')))) {
common_user_error(_t('Invalid profile URL returned by server.'));
return;
}
$user = User::staticGet('uri', $omb['listenee']);
if (!$user) {
common_user_error(_t('User being listened to doesn\'t exist.'));
return;
}
$fullname = $req->get_parameter('omb_listener_fullname');
$homepage = $req->get_parameter('omb_listener_homepage');
$bio = $req->get_parameter('omb_listener_bio');
$location = $req->get_parameter('omb_listener_location');
$avatar_url = $req->get_parameter('omb_listener_avatar');
list($newtok, $newsecret) = $this->access_token($omb);
if (!$newtok || !$newsecret) {
common_user_error(_t('Couldn\'t convert request tokens to access tokens.'));
return;
}
# XXX: possible attack point; subscribe and return someone else's profile URI
$remote = Remote_profile::staticGet('uri', $omb['listener']);
if ($remote) {
$exists = true;
$profile = Profile::staticGet($remote->id);
$orig_remote = clone($remote);
$orig_profile = clone($profile);
# XXX: compare current postNotice and updateProfile URLs to the ones
# stored in the DB to avoid (possibly...) above attack
} else {
$exists = false;
$remote = new Remote_profile();
$remote->uri = $omb['listener'];
$profile = new Profile();
}
$profile->nickname = $nickname;
$profile->profileurl = $profile_url;
if ($fullname) {
$profile->fullname = $fullname;
}
if ($homepage) {
$profile->homepage = $homepage;
}
if ($bio) {
$profile->bio = $bio;
}
if ($location) {
$profile->location = $location;
}
if ($exists) {
$profile->update($orig_profile);
} else {
$profile->created = DB_DataObject_Cast::dateTime(); # current time
$id = $profile->insert();
$remote->id = $id;
}
if ($avatar_url) {
$this->add_avatar($avatar_url);
}
$remote->postnoticeurl = $omb[OMB_ENDPOINT_POSTNOTICE];
$remote->updateprofileurl = $omb[OMB_ENDPOINT_UPDATEPROFILE];
if ($exists) {
$remote->update($orig_remote);
} else {
$remote->created = DB_DataObject_Cast::dateTime(); # current time
$remote->insert;
}
$sub = new Subscription();
$sub->subscriber = $remote->id;
$sub->subscribed = $user->id;
$sub->token = $newtok;
$sub->secret = $newsecret;
$sub->created = DB_DataObject_Cast::dateTime(); # current time
if (!$sub->insert()) {
common_user_error(_t('Couldn\'t insert new subscription.'));
return;
}
# Clear the data
unset($_SESSION['oauth_authorization_request']);
# If we show subscriptions in reverse chron order, this should
# show up close to the top of the page
common_redirect(common_local_url('subscribed', array('nickname' =>
$user->nickname)));
}
function access_token($omb) {
$con = omb_oauth_consumer();
$tok = new OAuthToken($omb['token'], $omb['secret']);
$url = omb_service_uri($omb[OAUTH_ENDPOINT_ACCESS]);
# XXX: Is this the right thing to do? Strip off GET params and make them
# POST params? Seems wrong to me.
$parsed = parse_url($url);
$params = array();
parse_str($parsed['query'], $params);
$req = OAuthRequest::from_consumer_and_token($con, $tok, "POST", $url, $params);
$req->set_parameter('omb_version', OMB_VERSION_01);
# XXX: test to see if endpoint accepts this signature method
$req->sign_request(omb_hmac_sha1(), $con, NULL);
# We re-use this tool's fetcher, since it's pretty good
$fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
$result = $fetcher->post($req->get_normalized_http_url(),
$req->to_postdata());
if ($result->status != 200) {
return NULL;
}
parse_str($result->body, $return);
return array($return['oauth_token'], $return['oauth_token_secret']);
}
}
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