Add a robots.txt URL to the site root

Adds a robots.txt file to the site root. Defaults defined by
'robotstxt' section of config. New events StartRobotsTxt and
EndRobotsTxt to let plugins add information. Probably not
useful if path is not /, but won't hurt anything, either.

1 files changed, 100 insertions, 0 deletions

diff --git a/actions/robotstxt.php b/actions/robotstxt.php
new file mode 100644
index 000000000..5131097c8
--- /dev/null
+++ b/actions/robotstxt.php
@@ -0,0 +1,100 @@
+<?php
+/**
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * robots.txt generator
+ *
+ * PHP version 5
+ *
+ * @category Action
+ * @package  StatusNet
+ * @author   Evan Prodromou <evan@status.net>
+ * @license  http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
+ * @link     http://status.net/
+ *
+ * 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('STATUSNET')) {
+    exit(1);
+}
+
+/**
+ * Prints out a static robots.txt
+ *
+ * @category Action
+ * @package  StatusNet
+ * @author   Evan Prodromou <evan@status.net>
+ * @license  http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
+ * @link     http://status.net/
+ */
+
+class RobotstxtAction extends Action
+{
+    /**
+     * Handles requests
+     *
+     * Since this is a relatively static document, we
+     * don't do a prepare()
+     *
+     * @param array $args GET, POST, and URL params; unused.
+     *
+     * @return void
+     */
+
+    function handle($args)
+    {
+        if (Event::handle('StartRobotsTxt', array($this))) {
+
+            header('Content-Type: text/plain');
+
+            print "User-Agent: *\n";
+
+            if (common_config('site', 'private')) {
+
+                print "Disallow: /\n";
+
+            } else {
+
+                $disallow = common_config('robotstxt', 'disallow');
+
+                foreach ($disallow as $dir) {
+                    print "Disallow: /$dir/\n";
+                }
+
+                $crawldelay = common_config('robotstxt', 'crawldelay');
+
+                if (!empty($crawldelay)) {
+                    print "Crawl-delay: " . $crawldelay . "\n";
+                }
+            }
+
+            Event::handle('EndRobotsTxt', array($this));
+        }
+    }
+
+    /**
+     * Return true; this page doesn't touch the DB.
+     *
+     * @param array $args other arguments
+     *
+     * @return boolean is read only action?
+     */
+
+    function isReadOnly($args)
+    {
+        return true;
+    }
+}