Revert "Revert "Actually commit the file this time""

This reverts commit ba89c89176.

actions/getfile.php

@@ -0,0 +1,145 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Returns a given file attachment, allowing private sites to only allow
+ * access to file attachments after login.
+ *
+ * PHP version 5
+ *
+ * LICENCE: 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/>.
+ *
+ * @category  Personal
+ * @package   StatusNet
+ * @author    Jeffery To <jeffery.to@gmail.com>
+ * @copyright 2008-2009 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET') && !defined('LACONICA')) {
+    exit(1);
+}
+
+require_once 'MIME/Type.php';
+
+/**
+ * Action for getting a file attachment
+ *
+ * @category Personal
+ * @package  StatusNet
+ * @author   Jeffery To <jeffery.to@gmail.com>
+ * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link     http://status.net/
+ */
+
+class GetfileAction extends Action
+{
+    /**
+     * Path of file to return
+     */
+
+    var $path = null;
+
+    /**
+     * Get file name
+     *
+     * @param array $args $_REQUEST array
+     *
+     * @return success flag
+     */
+
+    function prepare($args)
+    {
+        parent::prepare($args);
+
+        $filename = $this->trimmed('filename');
+        $path = null;
+
+        if ($filename) {
+            $path = common_config('attachments', 'dir') . $filename;
+        }
+
+        if (empty($path) or !file_exists($path)) {
+            $this->clientError(_('No such file.'), 404);
+            return false;
+        }
+        if (!is_readable($path)) {
+            $this->clientError(_('Cannot read file.'), 403);
+            return false;
+        }
+
+        $this->path = $path;
+        return true;
+    }
+
+    /**
+     * Is this page read-only?
+     *
+     * @return boolean true
+     */
+
+    function isReadOnly($args)
+    {
+        return true;
+    }
+
+    /**
+     * Last-modified date for file
+     *
+     * @return int last-modified date as unix timestamp
+     */
+
+    function lastModified()
+    {
+        return filemtime($this->path);
+    }
+
+    /**
+     * etag for file
+     *
+     * This returns the same data (inode, size, mtime) as Apache would,
+     * but in decimal instead of hex.
+     *
+     * @return string etag http header
+     */
+    function etag()
+    {
+        $stat = stat($this->path);
+        return '"' . $stat['ino'] . '-' . $stat['size'] . '-' . $stat['mtime'] . '"';
+    }
+
+    /**
+     * Handle input, produce output
+     *
+     * @param array $args $_REQUEST contents
+     *
+     * @return void
+     */
+
+    function handle($args)
+    {
+        // undo headers set by PHP sessions
+        $sec = session_cache_expire() * 60;
+        header('Expires: ' . date(DATE_RFC1123, time() + $sec));
+        header('Cache-Control: public, max-age=' . $sec);
+        header('Pragma: public');
+
+        parent::handle($args);
+
+        $path = $this->path;
+        header('Content-Type: ' . MIME_Type::autoDetect($path));
+        readfile($path);
+    }
+}