3 * GNU social - a federating social network
5 * Abstraction for files
7 * LICENCE: This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 * @author Mikael Nordfeldth <mmn@hethane.se>
23 * @author Miguel Dantas <biodantas@gmail.com>
24 * @copyright 2008-2009, 2019 Free Software Foundation http://fsf.org
25 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
26 * @link https://www.gnu.org/software/social/
29 defined('GNUSOCIAL') || die();
32 * Table Definition for file
34 class File extends Managed_DataObject
36 public $__table = 'file'; // table name
37 public $id; // int(4) primary_key not_null
38 public $urlhash; // varchar(64) unique_key
40 public $filehash; // varchar(64) indexed
41 public $mimetype; // varchar(50)
42 public $size; // int(4)
43 public $title; // text()
44 public $date; // int(4)
45 public $protected; // int(4)
46 public $filename; // text()
47 public $width; // int(4)
48 public $height; // int(4)
49 public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
51 const URLHASH_ALG = 'sha256';
52 const FILEHASH_ALG = 'sha256';
54 public static function schemaDef()
58 'id' => array('type' => 'serial', 'not null' => true),
59 'urlhash' => array('type' => 'varchar', 'length' => 64, 'not null' => true, 'description' => 'sha256 of destination URL (url field)'),
60 'url' => array('type' => 'text', 'description' => 'destination URL after following possible redirections'),
61 'filehash' => array('type' => 'varchar', 'length' => 64, 'not null' => false, 'description' => 'sha256 of the file contents, only for locally stored files of course'),
62 'mimetype' => array('type' => 'varchar', 'length' => 50, 'description' => 'mime type of resource'),
63 'size' => array('type' => 'int', 'description' => 'size of resource when available'),
64 'title' => array('type' => 'text', 'description' => 'title of resource when available'),
65 'date' => array('type' => 'int', 'description' => 'date of resource according to http query'),
66 'protected' => array('type' => 'int', 'description' => 'true when URL is private (needs login)'),
67 'filename' => array('type' => 'text', 'description' => 'if file is stored locally (too) this is the filename'),
68 'width' => array('type' => 'int', 'description' => 'width in pixels, if it can be described as such and data is available'),
69 'height' => array('type' => 'int', 'description' => 'height in pixels, if it can be described as such and data is available'),
71 'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
73 'primary key' => array('id'),
74 'unique keys' => array(
75 'file_urlhash_key' => array('urlhash'),
78 'file_filehash_idx' => array('filehash'),
83 public static function isProtected($url)
85 $protected_urls_exps = array(
86 'https://www.facebook.com/login.php',
87 common_path('main/login')
90 foreach ($protected_urls_exps as $protected_url_exp) {
91 if (preg_match('!^'.preg_quote($protected_url_exp).'(.*)$!i', $url) === 1) {
100 * Save a new file record.
102 * @param array $redir_data lookup data eg from File_redirection::where()
103 * @param string $given_url
105 * @throws ServerException
107 public static function saveNew(array $redir_data, $given_url)
111 // I don't know why we have to keep doing this but we run a last check to avoid
113 $file = File::getByUrl($given_url);
115 } catch (NoResultException $e) {
116 // We don't have the file's URL since before, so let's continue.
119 // if the given url is an local attachment url and the id already exists, don't
120 // save a new file record. This should never happen, but let's make it foolproof
121 // FIXME: how about attachments servers?
122 $u = parse_url($given_url);
123 if (isset($u['host']) && $u['host'] === common_config('site', 'server')) {
125 // Skip the / in the beginning or $r->map won't match
127 $args = $r->map(mb_substr($u['path'], 1));
128 if ($args['action'] === 'attachment') {
130 // $args['attachment'] should always be set if action===attachment, given our routing rules
131 $file = File::getByID($args['attachment']);
133 } catch (EmptyPkeyValueException $e) {
134 // ...but $args['attachment'] can also be 0...
135 } catch (NoResultException $e) {
136 // apparently this link goes to us, but is _not_ an existing attachment (File) ID?
139 } catch (Exception $e) {
140 // Some other exception was thrown from $r->map, likely a
141 // ClientException (404) because of some malformed link to
142 // our own instance. It's still a valid URL however, so we
143 // won't abort anything... I noticed this when linking:
144 // https://social.umeahackerspace.se/mmn/foaf' (notice the
145 // apostrophe in the end, making it unrecognizable for our
147 // That specific issue (the apostrophe being part of a link
148 // is something that may or may not have been fixed since,
149 // in lib/util.php in common_replace_urls_callback().
154 $file->url = $given_url;
155 if (!empty($redir_data['protected'])) {
156 $file->protected = $redir_data['protected'];
158 if (!empty($redir_data['title'])) {
159 $file->title = $redir_data['title'];
161 if (!empty($redir_data['type'])) {
162 $file->mimetype = $redir_data['type'];
164 if (!empty($redir_data['size'])) {
165 $file->size = intval($redir_data['size']);
167 if (isset($redir_data['time']) && $redir_data['time'] > 0) {
168 $file->date = intval($redir_data['time']);
174 public function saveFile()
176 $this->urlhash = self::hashurl($this->url);
178 if (!Event::handle('StartFileSaveNew', array(&$this))) {
179 throw new ServerException('File not saved due to an aborted StartFileSaveNew event.');
182 $this->id = $this->insert();
184 if ($this->id === false) {
185 throw new ServerException('File/URL metadata could not be saved to the database.');
188 Event::handle('EndFileSaveNew', array($this));
192 * Go look at a URL and possibly save data about it if it's new:
193 * - follow redirect chains and store them in file_redirection
194 * - if a thumbnail is available, save it in file_thumbnail
195 * - save file record with basic info
196 * - optionally save a file_to_post record
197 * - return the File object with the full reference
199 * @param string $given_url the URL we're looking at
200 * @param Notice $notice (optional)
201 * @param bool $followRedirects defaults to true
203 * @return mixed File on success, -1 on some errors
205 * @throws ServerException on failure
207 public static function processNew($given_url, Notice $notice=null, $followRedirects=true)
209 if (empty($given_url)) {
210 throw new ServerException('No given URL to process');
213 $given_url = File_redirection::_canonUrl($given_url);
214 if (empty($given_url)) {
215 throw new ServerException('No canonical URL from given URL to process');
218 $redir = File_redirection::where($given_url);
220 $file = $redir->getFile();
221 } catch (EmptyPkeyValueException $e) {
222 common_log(LOG_ERR, 'File_redirection::where gave object with empty file_id for given_url '._ve($given_url));
223 throw new ServerException('URL processing failed without new File object');
224 } catch (NoResultException $e) {
225 // This should not happen
226 common_log(LOG_ERR, 'File_redirection after discovery could still not return a File object.');
227 throw new ServerException('URL processing failed without new File object');
230 if ($notice instanceof Notice) {
231 File_to_post::processNew($file, $notice);
237 public static function respectsQuota(Profile $scoped, $fileSize)
239 if ($fileSize > common_config('attachments', 'file_quota')) {
240 // TRANS: Message used to be inserted as %2$s in the text "No file may
241 // TRANS: be larger than %1$d byte and the file you sent was %2$s.".
242 // TRANS: %1$d is the number of bytes of an uploaded file.
243 $fileSizeText = sprintf(_m('%1$d byte', '%1$d bytes', $fileSize), $fileSize);
245 $fileQuota = common_config('attachments', 'file_quota');
246 // TRANS: Message given if an upload is larger than the configured maximum.
247 // TRANS: %1$d (used for plural) is the byte limit for uploads,
248 // TRANS: %2$s is the proper form of "n bytes". This is the only ways to have
249 // TRANS: gettext support multiple plurals in the same message, unfortunately...
250 throw new ClientException(
253 'No file may be larger than %1$d byte and the file you sent was %2$s. Try to upload a smaller version.',
254 'No file may be larger than %1$d bytes and the file you sent was %2$s. Try to upload a smaller version.',
265 $query = "select sum(size) as total from file join file_to_post on file_to_post.file_id = file.id join notice on file_to_post.post_id = notice.id where profile_id = {$scoped->id} and file.url like '%/notice/%/file'";
266 $file->query($query);
268 $total = $file->total + $fileSize;
269 if ($total > common_config('attachments', 'user_quota')) {
270 // TRANS: Message given if an upload would exceed user quota.
271 // TRANS: %d (number) is the user quota in bytes and is used for plural.
272 throw new ClientException(
275 'A file this large would exceed your user quota of %d byte.',
276 'A file this large would exceed your user quota of %d bytes.',
277 common_config('attachments', 'user_quota')
279 common_config('attachments', 'user_quota')
283 $query .= ' AND EXTRACT(month FROM file.modified) = EXTRACT(month FROM now()) and EXTRACT(year FROM file.modified) = EXTRACT(year FROM now())';
284 $file->query($query);
286 $total = $file->total + $fileSize;
287 if ($total > common_config('attachments', 'monthly_quota')) {
288 // TRANS: Message given id an upload would exceed a user's monthly quota.
289 // TRANS: $d (number) is the monthly user quota in bytes and is used for plural.
290 throw new ClientException(
293 'A file this large would exceed your monthly quota of %d byte.',
294 'A file this large would exceed your monthly quota of %d bytes.',
295 common_config('attachments', 'monthly_quota')
297 common_config('attachments', 'monthly_quota')
304 public function getFilename()
306 return self::tryFilename($this->filename);
309 public function getSize()
311 return intval($this->size);
314 // where should the file go?
316 public static function filename(Profile $profile, $origname, $mimetype)
318 $ext = self::guessMimeExtension($mimetype, $origname);
320 // Normalize and make the original filename more URL friendly.
321 $origname = basename($origname, ".$ext");
322 if (class_exists('Normalizer')) {
323 // http://php.net/manual/en/class.normalizer.php
324 // http://www.unicode.org/reports/tr15/
325 $origname = Normalizer::normalize($origname, Normalizer::FORM_KC);
327 $origname = preg_replace('/[^A-Za-z0-9\.\_]/', '_', $origname);
329 $nickname = $profile->getNickname();
330 $datestamp = strftime('%Y%m%d', time());
332 // generate new random strings until we don't run into a filename collision.
333 $random = strtolower(common_confirmation_code(16));
334 $filename = "$nickname-$datestamp-$origname-$random.$ext";
335 } while (file_exists(self::path($filename)));
340 * @param $mimetype string The mimetype we've discovered for this file.
341 * @param $filename string An optional filename which we can use on failure.
342 * @return mixed|string
343 * @throws ClientException
345 public static function guessMimeExtension($mimetype, $filename=null)
348 // first see if we know the extension for our mimetype
349 $ext = common_supported_mime_to_ext($mimetype);
352 } catch (UnknownMimeExtensionException $e) {
353 // We don't know the extension for this mimetype, but let's guess.
355 // If we can't recognize the extension from the MIME, we try
356 // to guess based on filename, if one was supplied.
357 if (!is_null($filename) && preg_match('/^.+\.([A-Za-z0-9]+)$/', $filename, $matches)) {
358 // we matched on a file extension, so let's see if it means something.
359 $ext = mb_strtolower($matches[1]);
361 $blacklist = common_config('attachments', 'extblacklist');
362 // If we got an extension from $filename we want to check if it's in a blacklist
363 // so we avoid people uploading .php files etc.
364 if (array_key_exists($ext, $blacklist)) {
365 if (!is_string($blacklist[$ext])) {
366 // we don't have a safe replacement extension
367 throw new ClientException(_('Blacklisted file extension.'));
369 common_debug('Found replaced extension for filename '._ve($filename).': '._ve($ext));
371 // return a safe replacement extension ('php' => 'phps' for example)
372 return $blacklist[$ext];
374 // the attachment extension based on its filename was not blacklisted so it's ok to use it
377 } catch (Exception $e) {
378 common_log(LOG_INFO, 'Problem when figuring out extension for mimetype: '._ve($e));
381 // If nothing else has given us a result, try to extract it from
382 // the mimetype value (this turns .jpg to .jpeg for example...)
384 // FIXME: try to build a regexp that will get jpeg from image/jpeg as well as json from application/jrd+json
385 if (!preg_match('/\/([a-z0-9]+)/', mb_strtolower($mimetype), $matches)) {
386 throw new Exception('Malformed mimetype: '.$mimetype);
388 return mb_strtolower($matches[1]);
392 * Validation for as-saved base filenames
396 public static function validFilename($filename)
398 return preg_match('/^[A-Za-z0-9._-]+$/', $filename);
401 public static function tryFilename($filename)
403 if (!self::validFilename($filename)) {
404 throw new InvalidFilenameException($filename);
406 // if successful, return the filename for easy if-statementing
413 * @throws InvalidFilenameException
415 public static function path($filename)
417 self::tryFilename($filename);
419 $dir = common_config('attachments', 'dir');
421 if (!in_array($dir[mb_strlen($dir)-1], ['/', '\\'])) {
422 $dir .= DIRECTORY_SEPARATOR;
425 return $dir . $filename;
428 public static function url($filename)
430 self::tryFilename($filename);
432 if (common_config('site', 'private')) {
433 return common_local_url(
435 array('filename' => $filename)
439 if (GNUsocial::useHTTPS()) {
440 $sslserver = common_config('attachments', 'sslserver');
442 if (empty($sslserver)) {
443 // XXX: this assumes that background dir == site dir + /file/
444 // not true if there's another server
445 if (is_string(common_config('site', 'sslserver')) &&
446 mb_strlen(common_config('site', 'sslserver')) > 0) {
447 $server = common_config('site', 'sslserver');
448 } elseif (common_config('site', 'server')) {
449 $server = common_config('site', 'server');
451 $path = common_config('site', 'path') . '/file/';
453 $server = $sslserver;
454 $path = common_config('attachments', 'sslpath');
456 $path = common_config('attachments', 'path');
462 $path = common_config('attachments', 'path');
463 $server = common_config('attachments', 'server');
465 if (empty($server)) {
466 $server = common_config('site', 'server');
469 $ssl = common_config('attachments', 'ssl');
471 $protocol = ($ssl) ? 'https' : 'http';
474 if ($path[strlen($path)-1] != '/') {
478 if ($path[0] != '/') {
482 return $protocol.'://'.$server.$path.$filename;
485 public static $_enclosures = array();
487 public function getEnclosure()
489 if (isset(self::$_enclosures[$this->getID()])) {
490 return self::$_enclosures[$this->getID()];
493 $enclosure = (object) array();
494 foreach (array('title', 'url', 'date', 'modified', 'size', 'mimetype', 'width', 'height') as $key) {
495 if ($this->$key !== '') {
496 $enclosure->$key = $this->$key;
500 $needMoreMetadataMimetypes = array(null, 'application/xhtml+xml', 'text/html');
502 if (!isset($this->filename) && in_array(common_bare_mime($enclosure->mimetype), $needMoreMetadataMimetypes)) {
503 // This fetches enclosure metadata for non-local links with unset/HTML mimetypes,
504 // which may be enriched through oEmbed or similar (implemented as plugins)
505 Event::handle('FileEnclosureMetadata', array($this, &$enclosure));
507 if (empty($enclosure->mimetype)) {
508 // This means we either don't know what it is, so it can't
509 // be shown as an enclosure, or it is an HTML link which
510 // does not link to a resource with further metadata.
511 throw new ServerException('Unknown enclosure mimetype, not enough metadata');
514 self::$_enclosures[$this->getID()] = $enclosure;
518 public function hasThumbnail()
521 $this->getThumbnail();
522 } catch (Exception $e) {
529 * Get the attachment's thumbnail record, if any.
530 * Make sure you supply proper 'int' typed variables (or null).
532 * @param $width int Max width of thumbnail in pixels. (if null, use common_config values)
533 * @param $height int Max height of thumbnail in pixels. (if null, square-crop to $width)
534 * @param $crop bool Crop to the max-values' aspect ratio
535 * @param $force_still bool Don't allow fallback to showing original (such as animated GIF)
536 * @param $upscale mixed Whether or not to scale smaller images up to larger thumbnail sizes. (null = site default)
538 * @return File_thumbnail
540 * @throws UseFileAsThumbnailException if the file is considered an image itself and should be itself as thumbnail
541 * @throws UnsupportedMediaException if, despite trying, we can't understand how to make a thumbnail for this format
542 * @throws ServerException on various other errors
544 public function getThumbnail($width=null, $height=null, $crop=false, $force_still=true, $upscale=null)
546 // Get some more information about this file through our ImageFile class
547 $image = ImageFile::fromFileObject($this);
548 if ($image->animated && !common_config('thumbnail', 'animated')) {
549 // null means "always use file as thumbnail"
550 // false means you get choice between frozen frame or original when calling getThumbnail
551 if (is_null(common_config('thumbnail', 'animated')) || !$force_still) {
553 // remote files with animated GIFs as thumbnails will match this
554 return File_thumbnail::byFile($this);
555 } catch (NoResultException $e) {
556 // and if it's not a remote file, it'll be safe to use the locally stored File
557 throw new UseFileAsThumbnailException($this);
562 return $image->getFileThumbnail(
566 !is_null($upscale) ? $upscale : common_config('thumbnail', 'upscale')
570 public function getPath()
572 $filepath = self::path($this->filename);
573 if (!file_exists($filepath)) {
574 throw new FileNotFoundException($filepath);
579 public function getAttachmentUrl()
581 return common_local_url('attachment', array('attachment'=>$this->getID()));
585 * @param mixed $use_local true means require local, null means prefer local, false means use whatever is stored
587 * @throws FileNotStoredLocallyException
589 public function getUrl($use_local=null)
591 if ($use_local !== false) {
592 if (is_string($this->filename) || !empty($this->filename)) {
593 // A locally stored file, so let's generate a URL for our instance.
594 return self::url($this->getFilename());
597 // if the file wasn't stored locally (has filename) and we require a local URL
598 throw new FileNotStoredLocallyException($this);
603 // No local filename available, return the URL we have stored
607 public static function getByUrl($url)
610 $file->urlhash = self::hashurl($url);
611 if (!$file->find(true)) {
612 throw new NoResultException($file);
618 * @param string $hashstr String of (preferrably lower case) hexadecimal characters, same as result of 'hash_file(...)'
620 * @throws NoResultException
622 public static function getByHash($hashstr)
625 $file->filehash = strtolower($hashstr);
626 if (!$file->find(true)) {
627 throw new NoResultException($file);
632 public function updateUrl($url)
634 $file = File::getKV('urlhash', self::hashurl($url));
635 if ($file instanceof File) {
636 throw new ServerException('URL already exists in DB');
638 $sql = 'UPDATE %1$s SET urlhash=%2$s, url=%3$s WHERE urlhash=%4$s;';
639 $result = $this->query(sprintf(
642 $this->_quote((string)self::hashurl($url)),
643 $this->_quote((string)$url),
644 $this->_quote((string)$this->urlhash)
646 if ($result === false) {
647 common_log_db_error($this, 'UPDATE', __FILE__);
648 throw new ServerException("Could not UPDATE {$this->tableName()}.url");
655 * Blow the cache of notices that link to this URL
657 * @param boolean $last Whether to blow the "last" cache too
662 public function blowCache($last=false)
664 self::blow('file:notice-ids:%s', $this->id);
666 self::blow('file:notice-ids:%s;last', $this->id);
668 self::blow('file:notice-count:%d', $this->id);
672 * Stream of notices linking to this URL
674 * @param integer $offset Offset to show; default is 0
675 * @param integer $limit Limit of notices to show
676 * @param integer $since_id Since this notice
677 * @param integer $max_id Before this notice
679 * @return array ids of notices that link to this file
682 public function stream($offset=0, $limit=NOTICES_PER_PAGE, $since_id=0, $max_id=0)
684 // FIXME: Try to get the Profile::current() here in some other way to avoid mixing
685 // the current session user with possibly background/queue processing.
686 $stream = new FileNoticeStream($this, Profile::current());
687 return $stream->getNotices($offset, $limit, $since_id, $max_id);
690 public function noticeCount()
692 $cacheKey = sprintf('file:notice-count:%d', $this->id);
694 $count = self::cacheGet($cacheKey);
696 if ($count === false) {
697 $f2p = new File_to_post();
699 $f2p->file_id = $this->id;
701 $count = $f2p->count();
703 self::cacheSet($cacheKey, $count);
709 public function isLocal()
711 return !empty($this->filename);
714 public function delete($useWhere=false)
716 // Delete the file, if it exists locally
717 if (!empty($this->filename) && file_exists(self::path($this->filename))) {
718 $deleted = @unlink(self::path($this->filename));
720 common_log(LOG_ERR, sprintf('Could not unlink existing file: "%s"', self::path($this->filename)));
724 // Clear out related things in the database and filesystem, such as thumbnails
725 if (Event::handle('FileDeleteRelated', array($this))) {
726 $thumbs = new File_thumbnail();
727 $thumbs->file_id = $this->id;
728 if ($thumbs->find()) {
729 while ($thumbs->fetch()) {
734 $f2p = new File_to_post();
735 $f2p->file_id = $this->id;
737 while ($f2p->fetch()) {
743 // And finally remove the entry from the database
744 return parent::delete($useWhere);
747 public function getTitle()
749 $title = $this->title ?: $this->filename;
751 return $title ?: null;
754 public function setTitle($title)
756 $orig = clone($this);
757 $this->title = mb_strlen($title) > 0 ? $title : null;
758 return $this->update($orig);
761 public static function hashurl($url)
764 throw new Exception('No URL provided to hash algorithm.');
766 return hash(self::URLHASH_ALG, $url);
769 public static function beforeSchemaUpdate()
771 $table = strtolower(get_called_class());
772 $schema = Schema::get();
773 $schemadef = $schema->getTableDef($table);
775 // 2015-02-19 We have to upgrade our table definitions to have the urlhash field populated
776 if (isset($schemadef['fields']['urlhash']) && isset($schemadef['unique keys']['file_urlhash_key'])) {
777 // We already have the urlhash field, so no need to migrate it.
780 echo "\nFound old $table table, upgrading it to contain 'urlhash' field...";
783 $file->query(sprintf('SELECT id, LEFT(url, 191) AS shortenedurl, COUNT(*) AS c FROM %1$s WHERE LENGTH(url)>191 GROUP BY shortenedurl HAVING c > 1', $schema->quoteIdentifier($table)));
784 print "\nFound {$file->N} URLs with too long entries in file table\n";
785 while ($file->fetch()) {
786 // We've got a URL that is too long for our future file table
787 // so we'll cut it. We could save the original URL, but there is
788 // no guarantee it is complete anyway since the previous max was 255 chars.
789 $dupfile = new File();
790 // First we find file entries that would be duplicates of this when shortened
791 // ... and we'll just throw the dupes out the window for now! It's already so borken.
792 $dupfile->query(sprintf('SELECT * FROM file WHERE LEFT(url, 191) = %1$s', $dupfile->_quote($file->shortenedurl)));
793 // Leave one of the URLs in the database by using ->find(true) (fetches first entry)
794 if ($dupfile->find(true)) {
795 print "\nShortening url entry for $table id: {$file->id} [";
796 $orig = clone($dupfile);
797 $origurl = $dupfile->url; // save for logging purposes
798 $dupfile->url = $file->shortenedurl; // make sure it's only 191 chars from now on
799 $dupfile->update($orig);
800 print "\nDeleting duplicate entries of too long URL on $table id: {$file->id} [";
801 // only start deleting with this fetch.
802 while ($dupfile->fetch()) {
803 common_log(LOG_INFO, sprintf('Deleting duplicate File entry of %1$d: %2$d (original URL: %3$s collides with these first 191 characters: %4$s', $dupfile->id, $file->id, $origurl, $file->shortenedurl));
809 print "\nWarning! URL suddenly disappeared from database: {$file->url}\n";
812 echo "...and now all the non-duplicates which are longer than 191 characters...\n";
813 $file->query('UPDATE file SET url=LEFT(url, 191) WHERE LENGTH(url)>191');
815 echo "\n...now running hacky pre-schemaupdate change for $table:";
816 // We have to create a urlhash that is _not_ the primary key,
817 // transfer data and THEN run checkSchema
818 $schemadef['fields']['urlhash'] = array(
821 'not null' => false, // this is because when adding column, all entries will _be_ NULL!
822 'description' => 'sha256 of destination URL (url field)',
824 $schemadef['fields']['url'] = array(
826 'description' => 'destination URL after following possible redirections',
828 unset($schemadef['unique keys']);
829 $schema->ensureTable($table, $schemadef);
832 $classname = ucfirst($table);
833 $tablefix = new $classname;
834 // urlhash is hash('sha256', $url) in the File table
835 echo "Updating urlhash fields in $table table...";
836 // Maybe very MySQL specific :(
837 $tablefix->query(sprintf(
838 'UPDATE %1$s SET %2$s=%3$s;',
839 $schema->quoteIdentifier($table),
841 // The line below is "result of sha256 on column `url`"
845 echo "Resuming core schema upgrade...";