<?php class Instances extends Plugin implements IHandler { private $link; private $host; private $status_codes = array( 0 => "Connection failed", 1 => "Success", 2 => "Invalid object received", 16 => "Access denied" ); function about() { return array(1.0, "Support for linking tt-rss instances together and sharing popular feeds.", "fox", true); } function init($host) { $this->link = $host->get_link(); $this->host = $host; $host->add_hook($host::HOOK_PREFS_TABS, $this); $host->add_handler("pref-instances", "*", $this); $host->add_handler("public", "fbexport", $this); $host->add_command("get-feeds", "receive popular feeds from linked instances", $this); $host->add_hook($host::HOOK_UPDATE_TASK, $this); } function hook_update_task($args) { _debug("Get linked feeds..."); $this->get_linked_feeds($this->link); } // Status codes: // -1 - never connected // 0 - no data received // 1 - data received successfully // 2 - did not receive valid data // >10 - server error, code + 10 (e.g. 16 means server error 6) function get_linked_feeds($link, $instance_id = false) { if ($instance_id) $instance_qpart = "id = '$instance_id' AND "; else $instance_qpart = ""; if (DB_TYPE == "pgsql") { $date_qpart = "last_connected < NOW() - INTERVAL '6 hours'"; } else { $date_qpart = "last_connected < DATE_SUB(NOW(), INTERVAL 6 HOUR)"; } $result = db_query($link, "SELECT id, access_key, access_url FROM ttrss_linked_instances WHERE $instance_qpart $date_qpart ORDER BY last_connected"); while ($line = db_fetch_assoc($result)) { $id = $line['id']; _debug("Updating: " . $line['access_url'] . " ($id)"); $fetch_url = $line['access_url'] . '/public.php?op=fbexport'; $post_query = 'key=' . $line['access_key']; $feeds = fetch_file_contents($fetch_url, false, false, false, $post_query); // try doing it the old way if (!$feeds) { $fetch_url = $line['access_url'] . '/backend.php?op=fbexport'; $feeds = fetch_file_contents($fetch_url, false, false, false, $post_query); } if ($feeds) { $feeds = json_decode($feeds, true); if ($feeds) { if ($feeds['error']) { $status = $feeds['error']['code'] + 10; // access denied if ($status == 16) { db_query($link, "DELETE FROM ttrss_linked_feeds WHERE instance_id = '$id'"); } } else { $status = 1; if (count($feeds['feeds']) > 0) { db_query($link, "DELETE FROM ttrss_linked_feeds WHERE instance_id = '$id'"); foreach ($feeds['feeds'] as $feed) { $feed_url = db_escape_string($this->link, $feed['feed_url']); $title = db_escape_string($this->link, $feed['title']); $subscribers = db_escape_string($this->link, $feed['subscribers']); $site_url = db_escape_string($this->link, $feed['site_url']); db_query($link, "INSERT INTO ttrss_linked_feeds (feed_url, site_url, title, subscribers, instance_id, created, updated) VALUES ('$feed_url', '$site_url', '$title', '$subscribers', '$id', NOW(), NOW())"); } } else { // received 0 feeds, this might indicate that // the instance on the other hand is rebuilding feedbrowser cache // we will try again later // TODO: maybe perform expiration based on updated here? } _debug("Processed " . count($feeds['feeds']) . " feeds."); } } else { $status = 2; } } else { $status = 0; } _debug("Status: $status"); db_query($link, "UPDATE ttrss_linked_instances SET last_status_out = '$status', last_connected = NOW() WHERE id = '$id'"); } } function get_feeds() { $this->get_linked_feeds($this->link, false); } function get_prefs_js() { return file_get_contents(dirname(__FILE__) . "/instances.js"); } function hook_prefs_tabs($args) { if ($_SESSION["access_level"] >= 10 || SINGLE_USER_MODE) { ?><div id="instanceConfigTab" dojoType="dijit.layout.ContentPane" href="backend.php?op=pref-instances" title="<?php echo __('Linked') ?>"></div><?php } } function csrf_ignore($method) { $csrf_ignored = array("index", "edit"); return array_search($method, $csrf_ignored) !== false; } function before($method) { if ($_SESSION["uid"]) { if ($_SESSION["access_level"] < 10) { print __("Your access level is insufficient to open this tab."); return false; } return true; } return false; } function after() { return true; } function remove() { $ids = db_escape_string($this->link, $_REQUEST['ids']); db_query($this->link, "DELETE FROM ttrss_linked_instances WHERE id IN ($ids)"); } function add() { $id = db_escape_string($this->link, $_REQUEST["id"]); $access_url = db_escape_string($this->link, $_REQUEST["access_url"]); $access_key = db_escape_string($this->link, $_REQUEST["access_key"]); db_query($this->link, "BEGIN"); $result = db_query($this->link, "SELECT id FROM ttrss_linked_instances WHERE access_url = '$access_url'"); if (db_num_rows($result) == 0) { db_query($this->link, "INSERT INTO ttrss_linked_instances (access_url, access_key, last_connected, last_status_in, last_status_out) VALUES ('$access_url', '$access_key', '1970-01-01', -1, -1)"); } db_query($this->link, "COMMIT"); } function edit() { $id = db_escape_string($this->link, $_REQUEST["id"]); $result = db_query($this->link, "SELECT * FROM ttrss_linked_instances WHERE id = '$id'"); print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"id\" value=\"$id\">"; print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"op\" value=\"pref-instances\">"; print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"method\" value=\"editSave\">"; print "<div class=\"dlgSec\">".__("Instance")."</div>"; print "<div class=\"dlgSecCont\">"; /* URL */ $access_url = htmlspecialchars(db_fetch_result($result, 0, "access_url")); print __("URL:") . " "; print "<input dojoType=\"dijit.form.ValidationTextBox\" required=\"1\" placeHolder=\"".__("Instance URL")."\" regExp='^(http|https)://.*' style=\"font-size : 16px; width: 20em\" name=\"access_url\" value=\"$access_url\">"; print "<hr/>"; $access_key = htmlspecialchars(db_fetch_result($result, 0, "access_key")); /* Access key */ print __("Access key:") . " "; print "<input dojoType=\"dijit.form.ValidationTextBox\" required=\"1\" placeHolder=\"".__("Access key")."\" regExp='\w{40}' style=\"width: 20em\" name=\"access_key\" id=\"instance_edit_key\" value=\"$access_key\">"; print "<p class='insensitive'>" . __("Use one access key for both linked instances."); print "</div>"; print "<div class=\"dlgButtons\"> <div style='float : left'> <button dojoType=\"dijit.form.Button\" onclick=\"return dijit.byId('instanceEditDlg').regenKey()\">". __('Generate new key')."</button> </div> <button dojoType=\"dijit.form.Button\" onclick=\"return dijit.byId('instanceEditDlg').execute()\">". __('Save')."</button> <button dojoType=\"dijit.form.Button\" onclick=\"return dijit.byId('instanceEditDlg').hide()\"\">". __('Cancel')."</button></div>"; } function editSave() { $id = db_escape_string($this->link, $_REQUEST["id"]); $access_url = db_escape_string($this->link, $_REQUEST["access_url"]); $access_key = db_escape_string($this->link, $_REQUEST["access_key"]); db_query($this->link, "UPDATE ttrss_linked_instances SET access_key = '$access_key', access_url = '$access_url', last_connected = '1970-01-01' WHERE id = '$id'"); } function index() { if (!function_exists('curl_init')) { print "<div style='padding : 1em'>"; print_error("This functionality requires CURL functions. Please enable CURL in your PHP configuration (you might also want to disable open_basedir in php.ini) and reload this page."); print "</div>"; } print "<div id=\"pref-instance-wrap\" dojoType=\"dijit.layout.BorderContainer\" gutters=\"false\">"; print "<div id=\"pref-instance-header\" dojoType=\"dijit.layout.ContentPane\" region=\"top\">"; print "<div id=\"pref-instance-toolbar\" dojoType=\"dijit.Toolbar\">"; $sort = db_escape_string($this->link, $_REQUEST["sort"]); if (!$sort || $sort == "undefined") { $sort = "access_url"; } print "<div dojoType=\"dijit.form.DropDownButton\">". "<span>" . __('Select')."</span>"; print "<div dojoType=\"dijit.Menu\" style=\"display: none;\">"; print "<div onclick=\"selectTableRows('prefInstanceList', 'all')\" dojoType=\"dijit.MenuItem\">".__('All')."</div>"; print "<div onclick=\"selectTableRows('prefInstanceList', 'none')\" dojoType=\"dijit.MenuItem\">".__('None')."</div>"; print "</div></div>"; print "<button dojoType=\"dijit.form.Button\" onclick=\"addInstance()\">".__('Link instance')."</button>"; print "<button dojoType=\"dijit.form.Button\" onclick=\"editSelectedInstance()\">".__('Edit')."</button>"; print "<button dojoType=\"dijit.form.Button\" onclick=\"removeSelectedInstances()\">".__('Remove')."</button>"; print "</div>"; #toolbar $result = db_query($this->link, "SELECT *, (SELECT COUNT(*) FROM ttrss_linked_feeds WHERE instance_id = ttrss_linked_instances.id) AS num_feeds FROM ttrss_linked_instances ORDER BY $sort"); print "<p class=\"insensitive\" style='margin-left : 1em;'>" . __("You can connect other instances of Tiny Tiny RSS to this one to share Popular feeds. Link to this instance of Tiny Tiny RSS by using this URL:"); print " <a href=\"#\" onclick=\"alert('".htmlspecialchars(get_self_url_prefix())."')\">(display url)</a>"; print "<p><table width='100%' id='prefInstanceList' class='prefInstanceList' cellspacing='0'>"; print "<tr class=\"title\"> <td align='center' width=\"5%\"> </td> <td width=''><a href=\"#\" onclick=\"updateInstanceList('access_url')\">".__('Instance URL')."</a></td> <td width='20%'><a href=\"#\" onclick=\"updateInstanceList('access_key')\">".__('Access key')."</a></td> <td width='10%'><a href=\"#\" onclick=\"updateUsersList('last_connected')\">".__('Last connected')."</a></td> <td width='10%'><a href=\"#\" onclick=\"updateUsersList('last_status_out')\">".__('Status')."</a></td> <td width='10%'><a href=\"#\" onclick=\"updateUsersList('num_feeds')\">".__('Stored feeds')."</a></td> </tr>"; $lnum = 0; while ($line = db_fetch_assoc($result)) { $class = ($lnum % 2) ? "even" : "odd"; $id = $line['id']; $this_row_id = "id=\"LIRR-$id\""; $line["last_connected"] = make_local_datetime($this->link, $line["last_connected"], false); print "<tr class=\"$class\" $this_row_id>"; print "<td align='center'><input onclick='toggleSelectRow(this);' type=\"checkbox\" id=\"LICHK-$id\"></td>"; $onclick = "onclick='editInstance($id, event)' title='".__('Click to edit')."'"; $access_key = mb_substr($line['access_key'], 0, 4) . '...' . mb_substr($line['access_key'], -4); print "<td $onclick>" . htmlspecialchars($line['access_url']) . "</td>"; print "<td $onclick>" . htmlspecialchars($access_key) . "</td>"; print "<td $onclick>" . htmlspecialchars($line['last_connected']) . "</td>"; print "<td $onclick>" . $this->status_codes[$line['last_status_out']] . "</td>"; print "<td $onclick>" . htmlspecialchars($line['num_feeds']) . "</td>"; print "</tr>"; ++$lnum; } print "</table>"; print "</div>"; #pane global $pluginhost; $pluginhost->run_hooks($pluginhost::HOOK_PREFS_TAB, "hook_prefs_tab", "prefInstances"); print "</div>"; #container } function fbexport() { $access_key = db_escape_string($this->link, $_POST["key"]); // TODO: rate limit checking using last_connected $result = db_query($this->link, "SELECT id FROM ttrss_linked_instances WHERE access_key = '$access_key'"); if (db_num_rows($result) == 1) { $instance_id = db_fetch_result($result, 0, "id"); $result = db_query($this->link, "SELECT feed_url, site_url, title, subscribers FROM ttrss_feedbrowser_cache ORDER BY subscribers DESC LIMIT 100"); $feeds = array(); while ($line = db_fetch_assoc($result)) { array_push($feeds, $line); } db_query($this->link, "UPDATE ttrss_linked_instances SET last_status_in = 1 WHERE id = '$instance_id'"); print json_encode(array("feeds" => $feeds)); } else { print json_encode(array("error" => array("code" => 6))); } } } ?>