Refactor on File::processNew
The code was so involved there was even a comment asking for a refactor. Now, File_redirection::where always returns a nice File_redirection object instead of an array or string or nothing. The object is either one which already existed or else a new, unsaved object. Instead of duplicating "does it exist" checks everywhere, do it in File_redirection::where. You either get what exists or something to save. An unsaved File_redirection may be paired with an unsaved File. You will want to save the File first (using ->saveFile()) and put the id in File_redirection#file_id before saving.
This commit is contained in:
Stephen Paul Weber
parent
2c8536dbf0
commit
a9b1b60a97
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@ -94,26 +94,31 @@ class File extends Managed_DataObject
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// We don't have the file's URL since before, so let's continue.
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}
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if (!Event::handle('StartFileSaveNew', array(&$redir_data, $given_url))) {
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throw new ServerException('File not saved due to an aborted StartFileSaveNew event.');
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}
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$file = new File;
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$file->urlhash = self::hashurl($given_url);
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$file->url = $given_url;
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if (!empty($redir_data['protected'])) $file->protected = $redir_data['protected'];
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if (!empty($redir_data['title'])) $file->title = $redir_data['title'];
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if (!empty($redir_data['type'])) $file->mimetype = $redir_data['type'];
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if (!empty($redir_data['size'])) $file->size = intval($redir_data['size']);
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if (isset($redir_data['time']) && $redir_data['time'] > 0) $file->date = intval($redir_data['time']);
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$file_id = $file->insert();
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$file->saveFile();
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return $file;
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}
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if ($file_id === false) {
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public function saveFile() {
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$this->urlhash = self::hashurl($this->url);
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if (!Event::handle('StartFileSaveNew', array(&$this))) {
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throw new ServerException('File not saved due to an aborted StartFileSaveNew event.');
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}
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$this->id = $this->insert();
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if ($this->id === false) {
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throw new ServerException('File/URL metadata could not be saved to the database.');
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}
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Event::handle('EndFileSaveNew', array($file, $redir_data, $given_url));
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return $file;
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Event::handle('EndFileSaveNew', array($this));
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}
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/**
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@ -124,7 +129,6 @@ class File extends Managed_DataObject
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* - optionally save a file_to_post record
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* - return the File object with the full reference
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*
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* @fixme refactor this mess, it's gotten pretty scary.
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* @param string $given_url the URL we're looking at
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* @param Notice $notice (optional)
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* @param bool $followRedirects defaults to true
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@ -143,69 +147,30 @@ class File extends Managed_DataObject
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throw new ServerException('No canonical URL from given URL to process');
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}
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$file = null;
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$redir = File_redirection::where($given_url);
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$file = $redir->getFile();
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try {
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$file = File::getByUrl($given_url);
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} catch (NoResultException $e) {
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// First check if we have a lookup trace for this URL already
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try {
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$file_redir = File_redirection::getByUrl($given_url);
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$file = File::getKV('id', $file_redir->file_id);
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if (!$file instanceof File) {
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// File did not exist, let's clean up the File_redirection entry
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$file_redir->delete();
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}
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} catch (NoResultException $e) {
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// We just wanted to doublecheck whether a File_thumbnail we might've had
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// actually referenced an existing File object.
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// If we still don't have a File object, let's create one now!
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if (empty($file->id)) {
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if ($redir->url === $given_url || !$followRedirects) {
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// Save the File object based on our lookup trace
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$file->saveFile();
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} else {
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$file->saveFile();
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$redir->file_id = $file->id;
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$redir->insert();
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}
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}
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// If we still don't have a File object, let's create one now!
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if (!$file instanceof File) {
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// @fixme for new URLs this also looks up non-redirect data
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// such as target content type, size, etc, which we need
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// for File::saveNew(); so we call it even if not following
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// new redirects.
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$redir_data = File_redirection::where($given_url);
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if (is_array($redir_data)) {
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$redir_url = $redir_data['url'];
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} elseif (is_string($redir_data)) {
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$redir_url = $redir_data;
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$redir_data = array();
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} else {
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// TRANS: Server exception thrown when a URL cannot be processed.
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throw new ServerException(sprintf(_("Cannot process URL '%s'"), $given_url));
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}
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if ($redir_url === $given_url || !$followRedirects) {
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// Save the File object based on our lookup trace
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$file = File::saveNew($redir_data, $given_url);
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} else {
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// This seems kind of messed up... for now skipping this part
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// if we're already under a redirect, so we don't go into
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// horrible infinite loops if we've been given an unstable
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// redirect (where the final destination of the first request
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// doesn't match what we get when we ask for it again).
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//
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// Seen in the wild with clojure.org, which redirects through
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// wikispaces for auth and appends session data in the URL params.
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$file = self::processNew($redir_url, $notice, /*followRedirects*/false);
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File_redirection::saveNew($redir_data, $file->id, $given_url);
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}
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if (!$file instanceof File) {
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// This should only happen if File::saveNew somehow did not return a File object,
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// though we have an assert for that in case the event there might've gone wrong.
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// If anything else goes wrong, there should've been an exception thrown.
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throw new ServerException('URL processing failed without new File object');
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}
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if (!$file instanceof File || empty($file->id)) {
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// This should not happen
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throw new ServerException('URL processing failed without new File object');
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}
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if ($notice instanceof Notice) {
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File_to_post::processNew($file, $notice);
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}
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return $file;
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}
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@ -39,6 +39,8 @@ class File_redirection extends Managed_DataObject
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/* the code above is auto generated do not remove the tag below */
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###END_AUTOCODE
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protected $file; /* Cache the associated file sometimes */
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public static function schemaDef()
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{
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return array(
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@ -155,41 +157,53 @@ class File_redirection extends Managed_DataObject
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*
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* @param string $in_url
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* @param boolean $discover true to attempt dereferencing the redirect if we don't know it already
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* @return mixed one of:
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* string - target URL, if this is a direct link or a known redirect
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* array - redirect info if this is an *unknown* redirect:
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* associative array with the following elements:
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* code: HTTP status code
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* redirects: count of redirects followed
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* url: URL string of final target
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* type (optional): MIME type from Content-Type header
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* size (optional): byte size from Content-Length header
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* time (optional): timestamp from Last-Modified header
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* @return File_redirection
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*/
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static function where($in_url, $discover=true) {
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// let's see if we know this...
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$redir = new File_redirection();
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$redir->url = $in_url;
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$redir->urlhash = File::hashurl($redir->url);
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$redir->redirections = 0;
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try {
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$a = File::getByUrl($in_url);
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// this is a direct link to $a->url
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return $a->url;
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$r = File_redirection::getByUrl($in_url);
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if($r instanceof File_redirection) {
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return $r;
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}
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} catch (NoResultException $e) {
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try {
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$b = File_redirection::getByUrl($in_url);
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// this is a redirect to $b->file_id
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$a = File::getByID($b->file_id);
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return $a->url;
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$f = File::getByUrl($in_url);
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$redir->file_id = $f->id;
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$redir->file = $f;
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return $redir;
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} catch (NoResultException $e) {
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// Oh well, let's keep going
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}
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}
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if ($discover) {
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$ret = File_redirection::lookupWhere($in_url);
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return $ret;
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$redir_info = File_redirection::lookupWhere($in_url);
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if(is_string($redir_info)) {
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$redir_info = array('url' => $redir_info);
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}
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// Double check that we don't already have the resolved URL
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$r = self::where($redir_info['url'], false);
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if (!empty($r->file_id)) {
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return $r;
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}
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}
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// No manual dereferencing; leave the unknown URL as is.
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return $in_url;
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$redir->httpcode = $redir_info['code'];
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$redir->redirections = intval($redir_info['redirects']);
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$redir->file = new File();
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$redir->file->url = $redir_info ? $redir_info['url'] : $in_url;
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$redir->file->mimetype = $redir_info['type'];
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$redir->file->size = $redir_info['size'];
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$redir->file->date = $redir_info['time'];
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if($redir_info['protected']) $redir->file->protected = true;
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return $redir;
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}
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/**
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@ -247,28 +261,12 @@ class File_redirection extends Managed_DataObject
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$short_url = (string)$short_url;
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// store it
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$file = File::getKV('url', $long_url);
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if ($file instanceof File) {
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$file_id = $file->getID();
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} else {
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if (!$file instanceof File) {
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// Check if the target URL is itself a redirect...
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$redir_data = File_redirection::where($long_url);
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if (is_array($redir_data)) {
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// We haven't seen the target URL before.
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// Save file and embedding data about it!
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$file = File::saveNew($redir_data, $long_url);
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$file_id = $file->getID();
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} else if (is_string($redir_data)) {
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// The file is a known redirect target.
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$file = File::getKV('url', $redir_data);
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if (empty($file)) {
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// @fixme should we save a new one?
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// this case was triggering sometimes for redirects
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// with unresolvable targets; found while fixing
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// "can't linkify" bugs with shortened links to
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// SSL sites with cert issues.
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return null;
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}
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$file_id = $file->getID();
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$redir = File_redirection::where($long_url);
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$file = $redir->getFile();
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if (empty($file->id)) {
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$file->saveFile();
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}
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}
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$file_redir = File_redirection::getKV('url', $short_url);
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@ -276,7 +274,7 @@ class File_redirection extends Managed_DataObject
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$file_redir = new File_redirection;
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$file_redir->urlhash = File::hashurl($short_url);
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$file_redir->url = $short_url;
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$file_redir->file_id = $file_id;
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$file_redir->file_id = $file->id;
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$file_redir->insert();
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}
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return $short_url;
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@ -385,4 +383,12 @@ class File_redirection extends Managed_DataObject
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echo "DONE.\n";
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echo "Resuming core schema upgrade...";
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}
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public function getFile() {
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if(empty($this->file) && $this->file_id) {
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$this->file = File::getKV('id', $this->file_id);
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}
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return $this->file;
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}
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}
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13
lib/util.php
13
lib/util.php
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@ -987,20 +987,9 @@ function common_linkify($url) {
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$canon = "mailto:$url";
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$longurl = "mailto:$url";
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} else {
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$canon = File_redirection::_canonUrl($url);
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$longurl_data = File_redirection::where($canon, common_config('attachments', 'process_links'));
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if (is_array($longurl_data)) {
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$longurl = $longurl_data['url'];
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} elseif (is_string($longurl_data)) {
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$longurl = $longurl_data;
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} else {
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// Unable to reach the server to verify contents, etc
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// Just pass the link on through for now.
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common_log(LOG_ERR, "Can't linkify url '$url'");
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$longurl = $url;
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}
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$longurl = $longurl_data->url;
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}
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$attrs = array('href' => $canon, 'title' => $longurl);
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@ -90,12 +90,10 @@ class OembedPlugin extends Plugin
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* Normally this event is called through File::saveNew()
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*
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* @param File $file The newly inserted File object.
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* @param array $redir_data lookup data eg from File_redirection::where()
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* @param string $given_url
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*
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* @return boolean success
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*/
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public function onEndFileSaveNew(File $file, array $redir_data, $given_url)
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public function onEndFileSaveNew(File $file)
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{
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$fo = File_oembed::getKV('file_id', $file->id);
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if ($fo instanceof File_oembed) {
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@ -103,15 +101,12 @@ class OembedPlugin extends Plugin
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return true;
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}
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if (isset($redir_data['oembed']['json'])
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&& !empty($redir_data['oembed']['json'])) {
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File_oembed::saveNew($redir_data['oembed']['json'], $file->id);
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} elseif (isset($redir_data['type'])
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&& (('text/html' === substr($redir_data['type'], 0, 9)
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|| 'application/xhtml+xml' === substr($redir_data['type'], 0, 21)))) {
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if (isset($file->mimetype)
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&& (('text/html' === substr($file->mimetype, 0, 9)
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|| 'application/xhtml+xml' === substr($file->mimetype, 0, 21)))) {
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try {
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$oembed_data = File_oembed::_getOembed($given_url);
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$oembed_data = File_oembed::_getOembed($file->url);
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if ($oembed_data === false) {
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throw new Exception('Did not get oEmbed data from URL');
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}
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@ -128,12 +128,12 @@ class File_oembed extends Managed_DataObject
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if ($file instanceof File) {
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$file_oembed->mimetype = $file->mimetype;
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} else {
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$file_redir = File_redirection::getKV('url', $given_url);
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if (empty($file_redir)) {
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$redir_data = File_redirection::where($given_url);
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$file_oembed->mimetype = $redir_data['type'];
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$redir = File_redirection::where($given_url);
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if (empty($redir->file_id)) {
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$f = $redir->getFile();
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$file_oembed->mimetype = $f->mimetype;
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} else {
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$file_id = $file_redir->file_id;
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$file_id = $redir->file_id;
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}
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}
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}
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@ -30,29 +30,27 @@ class StoreRemoteMediaPlugin extends Plugin
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*
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* Normally this event is called through File::saveNew()
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*
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* @param File $file The newly inserted File object.
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* @param array $redir_data lookup data eg from File_redirection::where()
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* @param string $given_url
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* @param File $file The abount-to-be-inserted File object.
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*
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* @return boolean success
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*/
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public function onStartFileSaveNew(array &$redir_data, $given_url)
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public function onStartFileSaveNew(File &$file)
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{
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// save given URL as title if it's a media file this plugin understands
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// which will make it shown in the AttachmentList widgets
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if (isset($redir_data['title']) && strlen($redir_data['title']>0)) {
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if (isset($file->title) && strlen($file->title)>0) {
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// Title is already set
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return true;
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}
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if (!isset($redir_data['type'])) {
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if (!isset($file->mimetype)) {
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// Unknown mimetype, it's not our job to figure out what it is.
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return true;
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}
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switch (common_get_mime_media($redir_data['type'])) {
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switch (common_get_mime_media($file->mimetype)) {
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case 'image':
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// Just to set something for now at least...
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$redir_data['title'] = $given_url;
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$file->title = $file->mimetype;
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break;
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}
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