file_quota for OembedPlugin too

Don't download huge files that might kill memory limits.

classes/File_thumbnail.php

@@ -273,6 +273,10 @@ class File_thumbnail extends Managed_DataObject
         return File::getByID($this->file_id);
     }
 
+    public function getFileId()
+    {
+        return $this->file_id;
+    }
 
     static public function hashurl($url)
     {

plugins/Oembed/OembedPlugin.php

@@ -377,16 +377,36 @@ class OembedPlugin extends Plugin
     protected function storeRemoteFileThumbnail(File_thumbnail $thumbnail)
     {
         if (!empty($thumbnail->filename) && file_exists($thumbnail->getPath())) {
-            throw new AlreadyFulfilledException(sprintf('A thumbnail seems to already exist for remote file with id==%u', $thumbnail->file_id));
+            throw new AlreadyFulfilledException(sprintf('A thumbnail seems to already exist for remote file with id==%u', $thumbnail->getFileId()));
         }
 
-        $url = $thumbnail->getUrl();
+        $remoteUrl = $thumbnail->getUrl();
-        $this->checkWhitelist($url);
+        $this->checkWhitelist($remoteUrl);
 
-        // First we download the file to memory and test whether it's actually an image file
+        $http = new HTTPClient();
+        // First see if it's too large for us
+        common_debug(__METHOD__ . ': '.sprintf('Performing HEAD request for remote file id==%u to avoid unnecessarily downloading too large files. URL: %s', $thumbnail->getFileId(), $remoteUrl));
+        $head = $http->head($remoteUrl);
+        $remoteUrl = $head->getEffectiveUrl();   // to avoid going through redirects again
+
+        $headers = $head->getHeader();
+        $filesize = isset($headers['content-length']) ? $headers['content-length'] : null;
+
+        // FIXME: I just copied some checks from StoreRemoteMedia, maybe we should have other checks for thumbnails? Or at least embed into some class somewhere.
+        if (empty($filesize)) {
+            // file size not specified on remote server
+            common_debug(sprintf('%s: Ignoring remote thumbnail because we did not get a content length for thumbnail for file id==%u', __CLASS__, $thumbnail->getFileId()));
+            return true;
+        } elseif ($filesize > common_config('attachments', 'file_quota')) {
+            // file too big according to site configuration
+            common_debug(sprintf('%s: Skip downloading remote thumbnail because content length (%u) is larger than file_quota (%u) for file id==%u', __CLASS__, intval($filesize), common_config('attachments', 'file_quota'), $thumbnail->getFileId()));
+            return true;
+        }
+
+        // Then we download the file to memory and test whether it's actually an image file
         // FIXME: To support remote video/whatever files, this needs reworking.
-        common_debug(sprintf('Downloading remote thumbnail for file id==%u with thumbnail URL: %s', $thumbnail->file_id, $url));
+        common_debug(sprintf('Downloading remote thumbnail for file id==%u (should be size %u) with effective URL: %s', $thumbnail->getFileId(), $filesize, _ve($remoteUrl)));
-        $imgData = HTTPClient::quickGet($url);
+        $imgData = HTTPClient::quickGet($remoteUrl);
         $info = @getimagesizefromstring($imgData);
         if ($info === false) {
             throw new UnsupportedMediaException(_('Remote file format was not identified as an image.'), $url);

plugins/StoreRemoteMedia/StoreRemoteMediaPlugin.php

@@ -91,7 +91,7 @@ class StoreRemoteMediaPlugin extends Plugin
             $http = new HTTPClient();
             common_debug(sprintf('Performing HEAD request for remote file id==%u to avoid unnecessarily downloading too large files. URL: %s', $file->getID(), $remoteUrl));
             $head = $http->head($remoteUrl);
-            $remoteUrl = $head->effectiveUrl;   // to avoid going through redirects again
+            $remoteUrl = $head->getEffectiveUrl();   // to avoid going through redirects again
             if (!$this->checkBlackList($remoteUrl)) {
                 common_log(LOG_WARN, sprintf('%s: Non-blacklisted URL %s redirected to blacklisted URL %s', __CLASS__, $file->getUrl(), $remoteUrl));
                 return true;
@@ -120,7 +120,7 @@ class StoreRemoteMediaPlugin extends Plugin
             common_debug(sprintf('Downloading remote file id==%u (should be size %u) with effective URL: %s', $file->getID(), $filesize, _ve($remoteUrl)));
             $imgData = HTTPClient::quickGet($remoteUrl);
         } catch (HTTP_Request2_ConnectionException $e) {
-            common_log(LOG_ERR, __CLASS__.': quickGet on URL: '._ve($file->getUrl()).' threw exception: '.$e->getMessage());
+            common_log(LOG_ERR, __CLASS__.': '._ve(get_class($e)).' on URL: '._ve($file->getUrl()).' threw exception: '.$e->getMessage());
             return true;
         }
         $info = @getimagesizefromstring($imgData);