public function onCreateFileImageThumbnailSource(File $file, &$imgPath, $media = null)
{
// If we are on a private node, we won't do any remote calls (just as a precaution until
// we can configure this from config.php for the private nodes)
if (common_config('site', 'private')) {
return true;
}
if ($media !== 'image') {
return true;
}
// If there is a local filename, it is either a local file already or has already been downloaded.
if (!empty($file->filename)) {
return true;
}
$this->checkWhitelist($file->getUrl());
// First we download the file to memory and test whether it's actually an image file
$imgData = HTTPClient::quickGet($file->getUrl());
common_debug(sprintf('Downloading remote file id==%u with URL: %s', $file->id, $file->getUrl()));
$info = @getimagesizefromstring($imgData);
if ($info === false) {
throw new UnsupportedMediaException(_('Remote file format was not identified as an image.'), $file->getUrl());
} elseif (!$info[0] || !$info[1]) {
throw new UnsupportedMediaException(_('Image file had impossible geometry (0 width or height)'));
}
$filehash = hash(File::FILEHASH_ALG, $imgData);
try {
// Exception will be thrown before $file is set to anything, so old $file value will be kept
$file = File::getByHash($filehash);
//FIXME: Add some code so we don't have to store duplicate File rows for same hash files.
} catch (NoResultException $e) {
$filename = $filehash . '.' . common_supported_mime_to_ext($info['mime']);
$fullpath = File::path($filename);
// Write the file to disk if it doesn't exist yet. Throw Exception on failure.
if (!file_exists($fullpath) && file_put_contents($fullpath, $imgData) === false) {
throw new ServerException(_('Could not write downloaded file to disk.'));
}
// Updated our database for the file record
$orig = clone $file;
$file->filehash = $filehash;
$file->filename = $filename;
$file->width = $info[0];
// array indexes documented on php.net:
$file->height = $info[1];
// https://php.net/manual/en/function.getimagesize.php
// Throws exception on failure.
$file->updateWithKeys($orig, 'id');
}
// Get rid of the file from memory
unset($imgData);
$imgPath = $file->getPath();
return false;
}
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));
}
$url = $thumbnail->getUrl();
$this->checkWhitelist($url);
// First 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));
$imgData = HTTPClient::quickGet($url);
$info = @getimagesizefromstring($imgData);
if ($info === false) {
throw new UnsupportedMediaException(_('Remote file format was not identified as an image.'), $url);
} elseif (!$info[0] || !$info[1]) {
throw new UnsupportedMediaException(_('Image file had impossible geometry (0 width or height)'));
}
// We'll trust sha256 not to have collision issues any time soon :)
$filename = hash('sha256', $imgData) . '.' . common_supported_mime_to_ext($info['mime']);
$fullpath = File_thumbnail::path($filename);
// Write the file to disk. Throw Exception on failure
if (!file_exists($fullpath) && file_put_contents($fullpath, $imgData) === false) {
throw new ServerException(_('Could not write downloaded file to disk.'));
}
// Get rid of the file from memory
unset($imgData);
// Updated our database for the file record
$orig = clone $thumbnail;
$thumbnail->filename = $filename;
$thumbnail->width = $info[0];
// array indexes documented on php.net:
$thumbnail->height = $info[1];
// https://php.net/manual/en/function.getimagesize.php
// Throws exception on failure.
$thumbnail->updateWithKeys($orig, 'file_id');
}
static function guessMimeExtension($mimetype)
{
try {
$ext = common_supported_mime_to_ext($mimetype);
} catch (Exception $e) {
// We don't support this mimetype, but let's guess the extension
$ext = substr(strrchr($mimetype, '/'), 1);
}
return strtolower($ext);
}
