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https://codeberg.org/streams/streams.git
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289 lines
No EOL
7.9 KiB
PHP
289 lines
No EOL
7.9 KiB
PHP
<?php
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namespace Zotlabs\Module;
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use Zotlabs\Web\Controller;
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use Zotlabs\Lib\ActivityStreams;
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use Zotlabs\Lib\Activity as ZlibActivity;
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use Zotlabs\Lib\Libzot;
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use Zotlabs\Web\HTTPSig;
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use Zotlabs\Lib\LDSignatures;
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use Zotlabs\Lib\ThreadListener;
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use App;
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class Activity extends Controller {
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function init() {
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if (ActivityStreams::is_as_request()) {
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$item_id = argv(1);
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if (! $item_id) {
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return;
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}
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$ob_authorise = false;
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$item_uid = 0;
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$bear = ZlibActivity::token_from_request();
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if ($bear) {
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logger('bear: ' . $bear, LOGGER_DEBUG);
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$t = q("select item.uid, iconfig.v from iconfig left join item on iid = item.id where cat = 'ocap' and item.uuid = '%s'",
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dbesc($item_id)
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);
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if ($t) {
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foreach ($t as $token) {
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if ($token['v'] === $bear) {
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$ob_authorize = true;
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$item_uid = $token['uid'];
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break;
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}
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}
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}
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}
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$item_normal = " and item.item_hidden = 0 and item.item_type = 0 and item.item_unpublished = 0
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and item.item_delayed = 0 and item.item_blocked = 0 ";
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$sigdata = HTTPSig::verify(EMPTY_STR);
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if ($sigdata['portable_id'] && $sigdata['header_valid']) {
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$portable_id = $sigdata['portable_id'];
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if (! check_channelallowed($portable_id)) {
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http_status_exit(403, 'Permission denied');
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}
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if (! check_siteallowed($sigdata['signer'])) {
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http_status_exit(403, 'Permission denied');
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}
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observer_auth($portable_id);
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}
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// if passed an owner_id of 0 to item_permissions_sql(), we force "guest access" or observer checking
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// Give ocap tokens priority
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if ($ob_authorize) {
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$sql_extra = " and item.uid = " . intval($token['uid']) . " ";
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}
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else {
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$sql_extra = item_permissions_sql(0);
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}
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$r = q("select * from item where ( uuid = '%s' or mid = '%s' or mid = '%s' ) $item_normal $sql_extra limit 1",
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dbesc($item_id),
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dbesc(z_root() . '/activity/' . $item_id),
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dbesc(z_root() . '/item/' . $item_id)
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);
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if (! $r) {
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$r = q("select * from item where ( uuid = '%s' or mid = '%s' or mid = '%s' ) $item_normal limit 1",
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dbesc($item_id),
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dbesc(z_root() . '/activity/' . $item_id),
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dbesc(z_root() . '/item/' . $item_id)
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);
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if ($r) {
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http_status_exit(403, 'Forbidden');
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}
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http_status_exit(404, 'Not found');
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}
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xchan_query($r,true);
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$items = fetch_post_tags($r,false);
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if ($portable_id && (! intval($items[0]['item_private']))) {
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$c = q("select abook_id from abook where abook_channel = %d and abook_xchan = '%s'",
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intval($items[0]['uid']),
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dbesc($portable_id)
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);
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if (! $c) {
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ThreadListener::store(z_root() . '/activity/' . $item_id,$portable_id);
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}
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}
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$channel = channelx_by_n($items[0]['uid']);
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as_return_and_die(ZlibActivity::encode_activity($items[0],true),$channel);
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}
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if (Libzot::is_zot_request()) {
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$item_id = argv(1);
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if (! $item_id) {
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http_status_exit(404, 'Not found');
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}
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$portable_id = EMPTY_STR;
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$item_normal = " and item.item_hidden = 0 and item.item_type = 0 and item.item_unpublished = 0 and item.item_delayed = 0 and item.item_blocked = 0 and not verb in ( 'Follow', 'Ignore' ) ";
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$i = null;
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// do we have the item (at all)?
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$r = q("select * from item where mid = '%s' $item_normal limit 1",
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dbesc(z_root() . '/activity/' . $item_id)
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);
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if (! $r) {
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$r = q("select * from item where mid = '%s' $item_normal limit 1",
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dbesc(z_root() . '/item/' . $item_id)
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);
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if ($r) {
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goaway(z_root() . '/item/' . $item_id);
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}
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http_status_exit(404,'Not found');
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}
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// process an authenticated fetch
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$sigdata = HTTPSig::verify(EMPTY_STR);
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if($sigdata['portable_id'] && $sigdata['header_valid']) {
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$portable_id = $sigdata['portable_id'];
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observer_auth($portable_id);
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// first see if we have a copy of this item's parent owned by the current signer
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// include xchans for all zot-like networks - these will have the same guid and public key
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$x = q("select * from xchan where xchan_hash = '%s'",
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dbesc($sigdata['portable_id'])
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);
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if ($x) {
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$xchans = q("select xchan_hash from xchan where xchan_hash = '%s' OR ( xchan_guid = '%s' AND xchan_pubkey = '%s' ) ",
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dbesc($sigdata['portable_id']),
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dbesc($x[0]['xchan_guid']),
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dbesc($x[0]['xchan_pubkey'])
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);
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if ($xchans) {
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$hashes = ids_to_querystr($xchans,'xchan_hash',true);
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$i = q("select id as item_id from item where mid = '%s' $item_normal and owner_xchan in ( " . protect_sprintf($hashes) . " ) limit 1",
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dbesc($r[0]['parent_mid'])
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);
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}
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}
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}
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// if we don't have a parent id belonging to the signer see if we can obtain one as a visitor that we have permission to access
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// with a bias towards those items owned by channels on this site (item_wall = 1)
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$sql_extra = item_permissions_sql(0);
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if (! $i) {
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$i = q("select id as item_id from item where mid = '%s' $item_normal $sql_extra order by item_wall desc limit 1",
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dbesc($r[0]['parent_mid'])
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);
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}
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$bear = ZlibActivity::token_from_request();
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if ($bear) {
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logger('bear: ' . $bear, LOGGER_DEBUG);
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if (! $i) {
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$t = q("select * from iconfig where cat = 'ocap' and k = 'relay' and v = '%s'",
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dbesc($bear)
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);
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if ($t) {
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$i = q("select id as item_id from item where uuid = '%s' and id = %d $item_normal limit 1",
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dbesc($item_id),
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intval($t[0]['iid'])
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);
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}
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}
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}
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if (! $i) {
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http_status_exit(403,'Forbidden');
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}
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$parents_str = ids_to_querystr($i,'item_id');
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$items = q("SELECT item.*, item.id AS item_id FROM item WHERE item.parent IN ( %s ) $item_normal ",
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dbesc($parents_str)
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);
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if(! $items) {
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http_status_exit(404, 'Not found');
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}
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xchan_query($items,true);
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$items = fetch_post_tags($items,true);
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$observer = App::get_observer();
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$parent = $items[0];
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$recips = (($parent['owner']['xchan_network'] === 'activitypub') ? get_iconfig($parent['id'],'activitypub','recips', []) : []);
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$to = (($recips && array_key_exists('to',$recips) && is_array($recips['to'])) ? $recips['to'] : null);
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$nitems = [];
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foreach($items as $i) {
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$mids = [];
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if(intval($i['item_private'])) {
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if(! $observer) {
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continue;
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}
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// ignore private reshare, possibly from hubzilla
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if($i['verb'] === 'Announce') {
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if(! in_array($i['thr_parent'],$mids)) {
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$mids[] = $i['thr_parent'];
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}
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continue;
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}
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// also ignore any children of the private reshares
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if(in_array($i['thr_parent'],$mids)) {
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continue;
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}
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if((! $to) || (! in_array($observer['xchan_url'],$to))) {
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continue;
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}
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}
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$nitems[] = $i;
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}
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if(! $nitems)
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http_status_exit(404, 'Not found');
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$chan = channelx_by_n($nitems[0]['uid']);
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if(! $chan)
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http_status_exit(404, 'Not found');
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if(! perm_is_allowed($chan['channel_id'],get_observer_hash(),'view_stream'))
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http_status_exit(403, 'Forbidden');
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$i = ZlibActivity::encode_item_collection($nitems,'conversation/' . $item_id,'OrderedCollection',true, count($nitems));
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if ($portable_id && (! intval($items[0]['item_private']))) {
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ThreadListener::store(z_root() . '/activity/' . $item_id,$portable_id);
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}
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if(! $i)
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http_status_exit(404, 'Not found');
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$x = array_merge(['@context' => [
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ACTIVITYSTREAMS_JSONLD_REV,
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'https://w3id.org/security/v1',
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ZlibActivity::ap_schema()
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]], $i);
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$headers = [];
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$headers['Content-Type'] = 'application/x-zot+json' ;
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$x['signature'] = LDSignatures::sign($x,$chan);
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$ret = json_encode($x, JSON_UNESCAPED_SLASHES);
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$headers['Digest'] = HTTPSig::generate_digest_header($ret);
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$headers['(request-target)'] = strtolower($_SERVER['REQUEST_METHOD']) . ' ' . $_SERVER['REQUEST_URI'];
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$h = HTTPSig::create_sig($headers,$chan['channel_prvkey'],channel_url($chan));
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HTTPSig::set_headers($h);
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echo $ret;
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killme();
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}
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goaway(z_root() . '/item/' . argv(1));
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}
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} |