diff options
Diffstat (limited to 'include/zot.php')
| -rw-r--r-- | include/zot.php | 388 |
1 files changed, 308 insertions, 80 deletions
diff --git a/include/zot.php b/include/zot.php index 09a3c28fa..b0d87cea9 100644 --- a/include/zot.php +++ b/include/zot.php @@ -4,9 +4,26 @@ require_once('include/crypto.php'); require_once('include/items.php'); /** + * Red implementation of zot protocol. + * + * https://github.com/friendica/red/wiki/zot + * https://github.com/friendica/red/wiki/Zot---A-High-Level-Overview + * + */ + + +/** * * @function zot_new_uid($channel_nick) - * @channel_id = unique nickname of controlling entity + * + * Generates a unique string for use as a zot guid using our DNS-based url, the channel nickname and some entropy. + * The entropy ensures uniqueness against re-installs where the same URL and nickname are chosen. + * NOTE: zot doesn't require this to be unique. Internally we use a whirlpool hash of this guid and the signature + * of this guid signed with the channel private key. This can be verified and should make the probability of + * collision of the verified result negligible within the constraints of our immediate universe. + * + * @param string channel_nickname = unique nickname of controlling entity + * * @returns string * */ @@ -18,41 +35,58 @@ function zot_new_uid($channel_nick) { /** - * - * Given an array of zot hashes, return all distinct hubs - * If primary is true, return only primary hubs - * Result is ordered by url to assist in batching. - * Return only the first primary hub as there should only be one. + * @function zot_get_hublocs($hash) + * Given a zot hash, return all distinct hubs. + * This function is used in building the zot discovery packet + * and therefore should only be used by channels which are defined + * on this hub + * @param string $hash - xchan_hash + * @retuns array of hubloc (hub location structures) + * hubloc_id int + * hubloc_guid char(255) + * hubloc_guid_sig text + * hubloc_hash char(255) + * hubloc_addr char(255) + * hubloc_flags int + * hubloc_status int + * hubloc_url char(255) + * hubloc_url_sig text + * hubloc_host char(255) + * hubloc_callback char(255) + * hubloc_connect char(255) + * hubloc_sitekey text + * hubloc_updated datetime + * hubloc_connected datetime * */ -function zot_get_hubloc($arr,$primary = false) { +function zot_get_hublocs($hash) { - $tmp = ''; - - if(is_array($arr)) { - foreach($arr as $e) { - if(strlen($tmp)) - $tmp .= ','; - $tmp .= "'" . dbesc($e) . "'" ; - } - } - - if(! strlen($tmp)) - return array(); - - $sql_extra = (($primary) ? " and hubloc_flags & " . intval(HUBLOC_FLAGS_PRIMARY) : "" ); - $limit = (($primary) ? " limit 1 " : ""); - return q("select * from hubloc where hubloc_hash in ( $tmp ) $sql_extra order by hubloc_url $limit"); + /** Only search for active hublocs - e.g. those that haven't been marked deleted */ + $ret = q("select * from hubloc where hubloc_hash = '%s' and not ( hubloc_flags & %d ) group by hubloc_url ", + dbesc($hash), + intval(HUBLOC_FLAGS_DELETED) + ); + return $ret; } -/* +/** + * + * @function zot_build_packet($channel,$type = 'notify',$recipients = null, $remote_key = null, $secret = null) + * builds a zot notification packet that you can either + * store in the queue with a message array or call zot_zot to immediately + * zot it to the other side * - * zot_build_packet builds a notification packet that you can either - * store in the queue with a message array or call zot_zot to immediately - * zot it to the other side + * @param array $channel => sender channel structure + * @param string $type => packet type: one of 'ping', 'pickup', 'purge', 'refresh', 'notify', 'auth_check' + * @param array $recipients => envelope information, array ( 'guid' => string, 'guid_sig' => string ); empty for public posts + * @param string $remote_key => optional public site key of target hub used to encrypt entire packet + * NOTE: remote_key and encrypted packets are required for 'auth_check' packets, optional for all others + * @param string $secret => random string, required for packets which require verification/callback + * e.g. 'pickup', 'purge', 'notify', 'auth_check' --- 'ping' and 'refresh' do not require verification * + * @returns string json encoded zot packet */ function zot_build_packet($channel,$type = 'notify',$recipients = null, $remote_key = null, $secret = null) { @@ -82,7 +116,7 @@ function zot_build_packet($channel,$type = 'notify',$recipients = null, $remote_ // Hush-hush ultra top-secret mode if($remote_key) { - $data = aes_encapsulate(json_encode($data),$remote_key); + $data = crypto_encapsulate(json_encode($data),$remote_key); } return json_encode($data); @@ -194,12 +228,27 @@ function zot_finger($webbie,$channel,$autofallback = true) { } /** - * @function: zot_refresh + * @function: zot_refresh($them, $channel = null) * - * zot_refresh is typically invoked when somebody has changed permissions of a channel and they are notified - * to fetch new permissions via a finger operation. This may result in a new connection (abook entry) being added to a local channel - * and it may result in auto-permissions being granted. + * zot_refresh is typically invoked when somebody has changed permissions of a channel and they are notified + * to fetch new permissions via a finger/discovery operation. This may result in a new connection + * (abook entry) being added to a local channel and it may result in auto-permissions being granted. + * + * Friending in zot is accomplished by sending a refresh packet to a specific channel which indicates a + * permission change has been made by the sender which affects the target channel. The hub controlling + * the target channel does targetted discovery (a zot-finger request requesting permissions for the local + * channel). These are decoded here, and if necessary and abook structure (addressbook) is created to store + * the permissions assigned to this channel. + * + * Initially these abook structures are created with a 'pending' flag, so that no reverse permissions are + * implied until this is approved by the owner channel. A channel can also auto-populate permissions in + * return and send back a refresh packet of its own. This is used by forum and group communication channels + * so that friending and membership in the channel's "club" is automatic. + * + * @param array $them => xchan structure of sender + * @param array $channel => local channel structure of target recipient, required for "friending" operations * + * @returns boolean true if successful, else false */ function zot_refresh($them,$channel = null) { @@ -269,7 +318,7 @@ function zot_refresh($them,$channel = null) { if($channel) { $global_perms = get_perms(); if($j['permissions']['data']) { - $permissions = aes_unencapsulate(array( + $permissions = crypto_unencapsulate(array( 'data' => $j['permissions']['data'], 'key' => $j['permissions']['key'], 'iv' => $j['permissions']['iv']), @@ -306,6 +355,11 @@ function zot_refresh($them,$channel = null) { ); if(! $y) logger('abook update failed'); + else { + // if we were just granted read stream permission and didn't have it before, try to pull in some posts + if((! ($r[0]['abook_their_perms'] & PERMS_R_STREAM)) && ($their_perms & PERMS_R_STREAM)) + proc_run('php','include/onepoll.php',$r[0]['abook_id']); + } } else { $default_perms = 0; @@ -330,7 +384,6 @@ function zot_refresh($them,$channel = null) { ); if($y) { - logger("New introduction received for {$channel['channel_name']}"); if($default_perms) { // send back a permissions update for auto-friend/auto-permissions @@ -342,6 +395,14 @@ function zot_refresh($them,$channel = null) { if($z) proc_run('php','include/notifier.php','permission_update',$z[0]['abook_id']); } + $new_connection = q("select abook_id, abook_flags from abook where abook_channel = %d and abook_xchan = '%s' order by abook_created desc limit 1", + intval($channel['channel_id']), + dbesc($x['hash']) + ); + + if($new_connection && (! ($new_connection[0]['abook_flags'] & ABOOK_FLAG_PENDING)) && ($their_perms & PERMS_R_STREAM)) + proc_run('php','include/onepoll.php',$new_connection[0]['abook_id']); + } } } @@ -354,7 +415,17 @@ function zot_refresh($them,$channel = null) { * @function: zot_gethub * * A guid and a url, both signed by the sender, distinguish a known sender at a known location - * This function looks these up to see if the channel is known. If not, we will need to verify it. + * This function looks these up to see if the channel is known and therefore previously verified. + * If not, we will need to verify it. + * + * @param array $arr + * $arr must contain: + * string $arr['guid'] => guid of conversant + * string $arr['guid_sig'] => guid signed with conversant's private key + * string $arr['url'] => URL of the origination hub of this communication + * string $arr['url_sig'] => URL signed with conversant's private key + * + * * @returns: array => hubloc record */ @@ -381,6 +452,27 @@ function zot_gethub($arr) { return null; } +/** + * @function zot_register_hub($arr) + * + * A communication has been received which has an unknown (to us) sender. + * Perform discovery based on our calculated hash of the sender at the origination address. + * This will fetch the discovery packet of the sender, which contains the public key we + * need to verify our guid and url signatures. + * + * @param array $arr + * $arr must contain: + * string $arr['guid'] => guid of conversant + * string $arr['guid_sig'] => guid signed with conversant's private key + * string $arr['url'] => URL of the origination hub of this communication + * string $arr['url_sig'] => URL signed with conversant's private key + * + * + * @returns array => 'success' (boolean true or false) + * 'message' (optional error string only if success is false) + */ + + function zot_register_hub($arr) { $result = array('success' => false); @@ -399,22 +491,49 @@ function zot_register_hub($arr) { if($x['success']) { $record = json_decode($x['body'],true); - $c = import_xchan($record); - if($c['success']) - $result['success'] = true; + + /* + * We now have a key - only continue registration if our signatures are valid + * AND the guid and guid sig in the returned packet match those provided in + * our current communication. + */ + + if((rsa_verify($arr['guid'],base64url_decode($arr['guid_sig']),$record['key'])) + && (rsa_verify($arr['url'],base64url_decode($arr['url_sig']),$record['key'])) + && ($arr['guid'] === $record['guid']) + && ($arr['guid_sig'] === $record['guid_sig'])) { + + $c = import_xchan($record); + if($c['success']) + $result['success'] = true; + } + else { + logger('zot_register_hub: failure to verify returned packet.'); + } } } return $result; } - -// Takes a json associative array from zot_finger and imports the xchan and hublocs -// If the xchan already exists, update the name and photo if these have changed. -// +/** + * @function import_xchan($arr,$ud_flags = 1) + * Takes an associative array of a fecthed discovery packet and updates + * all internal data structures which need to be updated as a result. + * + * @param array $arr => json_decoded discovery packet + * @param int $ud_flags + * Determines whether to create a directory update record if any changes occur, default 1 or true + * + * @returns array => 'success' (boolean true or false) + * 'message' (optional error string only if success is false) + */ function import_xchan($arr,$ud_flags = 1) { + + call_hooks('import_xchan', $arr); + $ret = array('success' => false); $dirmode = intval(get_config('system','directory_mode')); @@ -437,7 +556,6 @@ function import_xchan($arr,$ud_flags = 1) { return $ret; } - logger('import_xchan: ' . $xchan_hash, LOGGER_DEBUG); $r = q("select * from xchan where xchan_hash = '%s' limit 1", @@ -552,19 +670,41 @@ function import_xchan($arr,$ud_flags = 1) { require_once('include/photo/photo_driver.php'); - $photos = import_profile_photo($arr['photo'],$xchan_hash); - $r = q("update xchan set xchan_photo_date = '%s', xchan_photo_l = '%s', xchan_photo_m = '%s', xchan_photo_s = '%s', xchan_photo_mimetype = '%s' + // see if this is a channel clone that's hosted locally - which we treat different from other xchans/connections + + $local = q("select channel_account_id, channel_id from channel where channel_hash = '%s' limit 1", + dbesc($xchan_hash) + ); + if($local) { + $ph = z_fetch_url($arr['photo'],true); + if($ph['success']) { + import_channel_photo($ph['body'], $arr['photo_mimetype'], $local[0]['channel_account_id'],$local[0]['channel_id']); + // reset the names in case they got messed up when we had a bug in this function + $photos = array( + z_root() . '/photo/profile/l/' . $local[0]['channel_id'], + z_root() . '/photo/profile/m/' . $local[0]['channel_id'], + z_root() . '/photo/profile/s/' . $local[0]['channel_id'], + $arr['photo_mimetype'] + ); + } + } + else { + $photos = import_profile_photo($arr['photo'],$xchan_hash); + } + if($photos) { + $r = q("update xchan set xchan_photo_date = '%s', xchan_photo_l = '%s', xchan_photo_m = '%s', xchan_photo_s = '%s', xchan_photo_mimetype = '%s' where xchan_hash = '%s' limit 1", - dbesc($arr['photo_updated']), + dbesc(datetime_convert('UTC','UTC',$arr['photo_updated'])), dbesc($photos[0]), dbesc($photos[1]), dbesc($photos[2]), dbesc($photos[3]), dbesc($xchan_hash) - ); + ); - $what .= 'photo '; - $changed = true; + $what .= 'photo '; + $changed = true; + } } // what we are missing for true hub independence is for any changes in the primary hub to @@ -572,10 +712,20 @@ function import_xchan($arr,$ud_flags = 1) { if($arr['locations']) { - $xisting = q("select hubloc_id, hubloc_url from hubloc where hubloc_hash = '%s'", + $xisting = q("select hubloc_id, hubloc_url, hubloc_sitekey from hubloc where hubloc_hash = '%s'", dbesc($xchan_hash) ); + // See if a primary is specified + + $has_primary = false; + foreach($arr['locations'] as $location) { + if($location['primary']) { + $has_primary = true; + break; + } + } + foreach($arr['locations'] as $location) { if(! rsa_verify($location['url'],base64url_decode($location['url_sig']),$arr['key'])) { logger('import_xchan: Unable to verify site signature for ' . $location['url']); @@ -583,15 +733,21 @@ function import_xchan($arr,$ud_flags = 1) { continue; } + // Ensure that they have one primary hub + + if(! $has_primary) + $location['primary'] = true; + + for($x = 0; $x < count($xisting); $x ++) { - if($xisting[$x]['hubloc_url'] == $location['url']) { + if(($xisting[$x]['hubloc_url'] === $location['url']) && ($xisting[$x]['hubloc_sitekey'] === $location['sitekey'])) { $xisting[$x]['updated'] = true; } } // match as many fields as possible in case anything at all changed. - $r = q("select * from hubloc where hubloc_hash = '%s' and hubloc_guid = '%s' and hubloc_guid_sig = '%s' and hubloc_url = '%s' and hubloc_url_sig = '%s' and hubloc_host = '%s' and hubloc_addr = '%s' and hubloc_callback = '%s' and hubloc_sitekey = '%s' limit 1", + $r = q("select * from hubloc where hubloc_hash = '%s' and hubloc_guid = '%s' and hubloc_guid_sig = '%s' and hubloc_url = '%s' and hubloc_url_sig = '%s' and hubloc_host = '%s' and hubloc_addr = '%s' and hubloc_callback = '%s' and hubloc_sitekey = '%s' ", dbesc($xchan_hash), dbesc($arr['guid']), dbesc($arr['guid_sig']), @@ -612,6 +768,16 @@ function import_xchan($arr,$ud_flags = 1) { intval($r[0]['hubloc_id']) ); } + + // Remove pure duplicates + if(count($r) > 1) { + for($h = 1; $h < count($r); $h ++) { + q("delete from hubloc where hubloc_id = %d limit 1", + intval($r[$h]['hubloc_id']) + ); + } + } + if((($r[0]['hubloc_flags'] & HUBLOC_FLAGS_PRIMARY) && (! $location['primary'])) || ((! ($r[0]['hubloc_flags'] & HUBLOC_FLAGS_PRIMARY)) && ($location['primary']))) { $r = q("update hubloc set hubloc_flags = (hubloc_flags ^ %d), hubloc_updated = '%s' where hubloc_id = %d limit 1", @@ -719,8 +885,6 @@ function import_xchan($arr,$ud_flags = 1) { } } - - if($changed) { $guid = random_string() . '@' . get_app()->get_hostname(); update_modtime($xchan_hash,$guid,$arr['address'],$ud_flags); @@ -744,6 +908,20 @@ function import_xchan($arr,$ud_flags = 1) { return $ret; } +/** + * @function zot_process_response($hub,$arr,$outq) { + * Called immediately after sending a zot message which is using queue processing + * Updates the queue item according to the response result and logs any information + * returned to aid communications troubleshooting. + * + * @param string $hub - url of site we just contacted + * @param array $arr - output of z_post_url() + * @param array $outq - The queue structure attached to this request + * + * @returns nothing + */ + + function zot_process_response($hub,$arr,$outq) { if(! $arr['success']) { @@ -779,14 +957,16 @@ function zot_process_response($hub,$arr,$outq) { } /** - * @function: zot_fetch + * @function zot_fetch($arr) * - * We received a notification packet (in mod/post.php) that a message is waiting for us, and we've verified the sender. - * Now send back a pickup message, using our message tracking ID ($arr['secret']), which we will sign. - * The entire pickup message is encrypted with the remote site's public key. - * If everything checks out on the remote end, we will receive back a packet containing one or more messages, - * which will be processed before returning. - * + * We received a notification packet (in mod/post.php) that a message is waiting for us, and we've verified the sender. + * Now send back a pickup message, using our message tracking ID ($arr['secret']), which we will sign with our site private key. + * The entire pickup message is encrypted with the remote site's public key. + * If everything checks out on the remote end, we will receive back a packet containing one or more messages, + * which will be processed and delivered before this function ultimately returns. + * + * @param array $arr + * decrypted and json decoded notify packet from remote site */ @@ -811,7 +991,7 @@ function zot_fetch($arr) { 'secret_sig' => base64url_encode(rsa_sign($arr['secret'],get_config('system','prvkey'))) ); - $datatosend = json_encode(aes_encapsulate(json_encode($data),$ret_hub['hubloc_sitekey'])); + $datatosend = json_encode(crypto_encapsulate(json_encode($data),$ret_hub['hubloc_sitekey'])); $fetch = zot_zot($url,$datatosend); $result = zot_import($fetch, $arr['sender']['url']); @@ -824,7 +1004,16 @@ function zot_fetch($arr) { * Process an incoming array of messages which were obtained via pickup, and * import, update, delete as directed. * - * The message types handled here are 'activity' (e.g. posts), 'mail' and 'profile' + * @param array $arr => 'pickup' structure returned from remote site + * @param string $sender_url => the url specified by the sender in the initial communication + * we will verify the sender and url in each returned message structure and also verify + * that all the messages returned match the site url that we are currently processing. + * + * The message types handled here are 'activity' (e.g. posts), 'mail' , 'profile', and 'channel_sync' + * + * @returns array => array ( [0] => string $channel_hash, [1] => string $delivery_status, [2] => string $address ) + * suitable for logging remotely, enumerating the processing results of each message/recipient combination. + * */ function zot_import($arr, $sender_url) { @@ -837,7 +1026,7 @@ function zot_import($arr, $sender_url) { } if(array_key_exists('iv',$data)) { - $data = json_decode(aes_unencapsulate($data,get_config('system','prvkey')),true); + $data = json_decode(crypto_unencapsulate($data,get_config('system','prvkey')),true); } $incoming = $data['pickup']; @@ -849,7 +1038,7 @@ function zot_import($arr, $sender_url) { $result = null; if(array_key_exists('iv',$i['notify'])) { - $i['notify'] = json_decode(aes_unencapsulate($i['notify'],get_config('system','prvkey')),true); + $i['notify'] = json_decode(crypto_unencapsulate($i['notify'],get_config('system','prvkey')),true); } logger('zot_import: notify: ' . print_r($i['notify'],true), LOGGER_DATA); @@ -898,11 +1087,29 @@ function zot_import($arr, $sender_url) { $deliveries = allowed_public_recips($i); } + + // Go through the hash array and remove duplicates. array_unique() won't do this because the array is more than one level. + + $no_dups = array(); + if($deliveries) { + foreach($deliveries as $d) { + if(! in_array($d['hash'],$no_dups)) + $no_dups[] = $d['hash']; + } + + if($no_dups) { + $deliveries = array(); + foreach($no_dups as $n) { + $deliveries[] = array('hash' => $n); + } + } + } + if(! $deliveries) { logger('zot_import: no deliveries on this site'); continue; } - + if($i['message']) { if($i['message']['type'] === 'activity') { $arr = get_item_elements($i['message']); @@ -1426,22 +1633,22 @@ function import_directory_profile($hash,$profile,$addr,$ud_flags = 1, $suppress_ $arr = array(); $arr['xprof_hash'] = $hash; - $arr['xprof_desc'] = (($profile['description']) ? htmlentities($profile['description'], ENT_COMPAT,'UTF-8',false) : ''); + $arr['xprof_desc'] = (($profile['description']) ? htmlspecialchars($profile['description'], ENT_COMPAT,'UTF-8',false) : ''); $arr['xprof_dob'] = datetime_convert('','',$profile['birthday'],'Y-m-d'); // !!!! check this for 0000 year $arr['xprof_age'] = (($profile['age']) ? intval($profile['age']) : 0); - $arr['xprof_gender'] = (($profile['gender']) ? htmlentities($profile['gender'], ENT_COMPAT,'UTF-8',false) : ''); - $arr['xprof_marital'] = (($profile['marital']) ? htmlentities($profile['marital'], ENT_COMPAT,'UTF-8',false) : ''); - $arr['xprof_sexual'] = (($profile['sexual']) ? htmlentities($profile['sexual'], ENT_COMPAT,'UTF-8',false) : ''); - $arr['xprof_locale'] = (($profile['locale']) ? htmlentities($profile['locale'], ENT_COMPAT,'UTF-8',false) : ''); - $arr['xprof_region'] = (($profile['region']) ? htmlentities($profile['region'], ENT_COMPAT,'UTF-8',false) : ''); - $arr['xprof_postcode'] = (($profile['postcode']) ? htmlentities($profile['postcode'], ENT_COMPAT,'UTF-8',false) : ''); - $arr['xprof_country'] = (($profile['country']) ? htmlentities($profile['country'], ENT_COMPAT,'UTF-8',false) : ''); + $arr['xprof_gender'] = (($profile['gender']) ? htmlspecialchars($profile['gender'], ENT_COMPAT,'UTF-8',false) : ''); + $arr['xprof_marital'] = (($profile['marital']) ? htmlspecialchars($profile['marital'], ENT_COMPAT,'UTF-8',false) : ''); + $arr['xprof_sexual'] = (($profile['sexual']) ? htmlspecialchars($profile['sexual'], ENT_COMPAT,'UTF-8',false) : ''); + $arr['xprof_locale'] = (($profile['locale']) ? htmlspecialchars($profile['locale'], ENT_COMPAT,'UTF-8',false) : ''); + $arr['xprof_region'] = (($profile['region']) ? htmlspecialchars($profile['region'], ENT_COMPAT,'UTF-8',false) : ''); + $arr['xprof_postcode'] = (($profile['postcode']) ? htmlspecialchars($profile['postcode'], ENT_COMPAT,'UTF-8',false) : ''); + $arr['xprof_country'] = (($profile['country']) ? htmlspecialchars($profile['country'], ENT_COMPAT,'UTF-8',false) : ''); $clean = array(); if(array_key_exists('keywords',$profile) and is_array($profile['keywords'])) { import_directory_keywords($hash,$profile['keywords']); foreach($profile['keywords'] as $kw) { - $kw = trim(htmlentities($kw,ENT_COMPAT,'UTF-8',false)); + $kw = trim(htmlspecialchars($kw,ENT_COMPAT,'UTF-8',false)); $kw = trim($kw,','); $clean[] = $kw; } @@ -1543,7 +1750,7 @@ function import_directory_keywords($hash,$keywords) { $clean = array(); foreach($keywords as $kw) { - $kw = trim(htmlentities($kw,ENT_COMPAT,'UTF-8',false)); + $kw = trim(htmlspecialchars($kw,ENT_COMPAT,'UTF-8',false)); $kw = trim($kw,','); $clean[] = $kw; } @@ -1642,10 +1849,10 @@ function import_site($arr,$pubkey) { $access_policy = ACCESS_TIERED; } - $directory_url = htmlentities($arr['directory_url'],ENT_COMPAT,'UTF-8',false); - $url = htmlentities($arr['url'],ENT_COMPAT,'UTF-8',false); - $sellpage = htmlentities($arr['sellpage'],ENT_COMPAT,'UTF-8',false); - $site_location = htmlentities($arr['location'],ENT_COMPAT,'UTF-8',false); + $directory_url = htmlspecialchars($arr['directory_url'],ENT_COMPAT,'UTF-8',false); + $url = htmlspecialchars($arr['url'],ENT_COMPAT,'UTF-8',false); + $sellpage = htmlspecialchars($arr['sellpage'],ENT_COMPAT,'UTF-8',false); + $site_location = htmlspecialchars($arr['location'],ENT_COMPAT,'UTF-8',false); if($exists) { if(($siterecord['site_flags'] != $site_directory) @@ -1916,3 +2123,24 @@ function get_rpost_path($observer) { } +function import_author_zot($x) { + $hash = base64url_encode(hash('whirlpool',$x['guid'] . $x['guid_sig'], true)); + $r = q("select hubloc_url from hubloc where hubloc_guid = '%s' and hubloc_guid_sig = '%s' and (hubloc_flags & %d) limit 1", + dbesc($x['guid']), + dbesc($x['guid_sig']), + intval(HUBLOC_FLAGS_PRIMARY) + ); + + if($r) { + logger('import_author_zot: in cache', LOGGER_DEBUG); + return $hash; + } + + logger('import_author_zot: entry not in cache - probing: ' . print_r($x,true), LOGGER_DEBUG); + + $them = array('hubloc_url' => $x['url'],'xchan_guid' => $x['guid'], 'xchan_guid_sig' => $x['guid_sig']); + if(zot_refresh($them)) + return $hash; + return false; +} + |