503 lines
14 KiB
PHP
503 lines
14 KiB
PHP
<?php /** @file */
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/*
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* File/attach API with the potential for revision control.
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*
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* TODO: a filesystem storage abstraction which maintains security (and 'data' contains a system filename
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* which is inaccessible from the web). This could get around PHP storage limits and store videos and larger
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* items, using fread or OS methods or native code to read/write or chunk it through.
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* Also an 'append' option to the storage function might be a useful addition.
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*/
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require_once('include/permissions.php');
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require_once('include/security.php');
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function z_mime_content_type($filename) {
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$mime_types = array(
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'txt' => 'text/plain',
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'htm' => 'text/html',
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'html' => 'text/html',
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'php' => 'text/html',
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'css' => 'text/css',
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'js' => 'application/javascript',
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'json' => 'application/json',
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'xml' => 'application/xml',
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'swf' => 'application/x-shockwave-flash',
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'flv' => 'video/x-flv',
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// images
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'png' => 'image/png',
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'jpe' => 'image/jpeg',
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'jpeg' => 'image/jpeg',
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'jpg' => 'image/jpeg',
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'gif' => 'image/gif',
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'bmp' => 'image/bmp',
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'ico' => 'image/vnd.microsoft.icon',
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'tiff' => 'image/tiff',
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'tif' => 'image/tiff',
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'svg' => 'image/svg+xml',
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'svgz' => 'image/svg+xml',
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// archives
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'zip' => 'application/zip',
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'rar' => 'application/x-rar-compressed',
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'exe' => 'application/x-msdownload',
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'msi' => 'application/x-msdownload',
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'cab' => 'application/vnd.ms-cab-compressed',
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// audio/video
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'mp3' => 'audio/mpeg',
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'wav' => 'audio/wav',
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'qt' => 'video/quicktime',
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'mov' => 'video/quicktime',
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'ogg' => 'application/ogg',
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// adobe
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'pdf' => 'application/pdf',
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'psd' => 'image/vnd.adobe.photoshop',
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'ai' => 'application/postscript',
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'eps' => 'application/postscript',
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'ps' => 'application/postscript',
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// ms office
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'doc' => 'application/msword',
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'rtf' => 'application/rtf',
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'xls' => 'application/vnd.ms-excel',
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'ppt' => 'application/vnd.ms-powerpoint',
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// open office
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'odt' => 'application/vnd.oasis.opendocument.text',
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'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
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);
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$dot = strpos($filename,'.');
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if($dot !== false) {
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$ext = strtolower(substr($filename,$dot+1));
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if (array_key_exists($ext, $mime_types)) {
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return $mime_types[$ext];
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}
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}
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// can't use this because we're just passing a name, e.g. not a file that can be opened
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// elseif (function_exists('finfo_open')) {
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// $finfo = @finfo_open(FILEINFO_MIME);
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// $mimetype = @finfo_file($finfo, $filename);
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// @finfo_close($finfo);
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// return $mimetype;
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// }
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else {
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return 'application/octet-stream';
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}
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}
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function attach_count_files($channel_id, $observer, $hash = '', $filename = '', $filetype = '') {
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$ret = array('success' => false);
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if(! perm_is_allowed($channel_id,$observer, 'read_storage')) {
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$ret['message'] = t('Permission denied.');
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return $ret;
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}
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require_once('include/security.php');
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$sql_extra = permissions_sql($channel_id);
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if($hash)
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$sql_extra .= protect_sprintf(" and hash = '" . dbesc($hash) . "' ");
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if($filename)
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$sql_extra .= protect_sprintf(" and filename like '@" . dbesc($filename) . "@' ");
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if($filetype)
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$sql_extra .= protect_sprintf(" and filetype like '@" . dbesc($filetype) . "@' ");
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$r = q("select id from attach where uid = %d $sql_extra",
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intval($channel_id)
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);
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$ret['success'] = ((is_array($r)) ? true : false);
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$ret['results'] = ((is_array($r)) ? count($r) : false);
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return $ret;
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}
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function attach_list_files($channel_id, $observer, $hash = '', $filename = '', $filetype = '', $orderby = 'created desc', $start = 0, $entries = 0) {
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$ret = array('success' => false);
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if(! perm_is_allowed($channel_id,$observer, 'read_storage')) {
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$ret['message'] = t('Permission denied.');
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return $ret;
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}
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require_once('include/security.php');
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$sql_extra = permissions_sql($channel_id);
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if($hash)
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$sql_extra .= protect_sprintf(" and hash = '" . dbesc($hash) . "' ");
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if($filename)
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$sql_extra .= protect_sprintf(" and filename like '@" . dbesc($filename) . "@' ");
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if($filetype)
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$sql_extra .= protect_sprintf(" and filetype like '@" . dbesc($filetype) . "@' ");
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if($entries)
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$limit = " limit " . intval($start) . ", " . intval(entries) . " ";
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// Retrieve all columns except 'data'
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$r = q("select id, aid, uid, hash, filename, filetype, filesize, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where uid = %d $sql_extra $orderby $limit",
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intval($channel_id)
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);
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$ret['success'] = ((is_array($r)) ? true : false);
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$ret['results'] = ((is_array($r)) ? $r : false);
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return $ret;
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}
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// Find an attachment by hash and revision. Returns the entire attach structure including data.
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// This could exhaust memory so most useful only when immediately sending the data.
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function attach_by_hash($hash,$rev = 0) {
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$ret = array('success' => false);
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// Check for existence, which will also provide us the owner uid
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$sql_extra = '';
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if($rev == (-1))
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$sql_extra = " order by revision desc ";
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elseif($rev)
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$sql_extra = " and revision = " . intval($rev) . " ";
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$r = q("SELECT uid FROM attach WHERE hash = '%s' $sql_extra LIMIT 1",
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dbesc($hash)
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);
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if(! $r) {
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$ret['message'] = t('Item was not found.');
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return $ret;
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}
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if(! perm_is_allowed($r[0]['uid'],get_observer_hash(),'view_storage')) {
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$ret['message'] = t('Permission denied.');
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return $ret;
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}
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$sql_extra = permissions_sql($r[0]['uid']);
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// Now we'll see if we can access the attachment
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dbg(1);
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$r = q("SELECT * FROM attach WHERE hash = '%s' and uid = %d $sql_extra LIMIT 1",
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dbesc($hash),
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intval($r[0]['uid'])
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);
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dbg(0);
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if(! $r) {
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$ret['message'] = t('Permission denied.');
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return $ret;
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}
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$ret['success'] = true;
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$ret['data'] = $r[0];
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return $ret;
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}
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function attach_by_hash_nodata($hash,$rev = 0) {
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$ret = array('success' => false);
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// Check for existence, which will also provide us the owner uid
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$sql_extra = '';
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if($rev == (-1))
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$sql_extra = " order by revision desc ";
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elseif($rev)
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$sql_extra = " and revision = " . intval($rev) . " ";
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$r = q("SELECT uid FROM attach WHERE hash = '%s' $sql_extra LIMIT 1",
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dbesc($hash)
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);
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if(! $r) {
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$ret['message'] = t('Item was not found.');
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return $ret;
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}
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if(! perm_is_allowed($r[0]['uid'],get_observer_hash(),'view_storage')) {
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$ret['message'] = t('Permission denied.');
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return $ret;
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}
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$sql_extra = permissions_sql($r[0]['uid']);
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// Now we'll see if we can access the attachment
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$r = q("select id, aid, uid, hash, filename, filetype, filesize, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where uid = %d and hash = '%s' $sql_extra limit 1",
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intval($r[0]['uid']),
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dbesc($hash)
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);
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if(! $r) {
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$ret['message'] = t('Permission denied.');
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return $ret;
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}
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$ret['success'] = true;
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$ret['data'] = $r[0];
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return $ret;
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}
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function attach_store($channel,$observer_hash,$options = '',$arr = null) {
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$ret = array('success' => false);
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$channel_id = $channel['channel_id'];
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$sql_options = '';
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if(! perm_is_allowed($channel_id,get_observer_hash(),'write_storage')) {
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$ret['message'] = t('Permission denied.');
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return $ret;
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}
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// The 'update' option sets db values without uploading a new attachment
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// 'replace' replaces the existing uploaded data
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// 'revision' creates a new revision with new upload data
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// Default is to upload a new file
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// revise or update must provide $arr['hash'] of the thing to revise/update
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if($options !== 'update') {
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if(! x($_FILES,'userfile')) {
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$ret['message'] = t('No source file.');
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return $ret;
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}
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$src = $_FILES['userfile']['tmp_name'];
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$filename = basename($_FILES['userfile']['name']);
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$filesize = intval($_FILES['userfile']['size']);
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}
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$existing_size = 0;
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if($options === 'replace') {
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$x = q("select id, hash, filesize from attach where id = %d and uid = %d limit 1",
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intval($replace),
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intval($channel_id)
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);
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if(! $x) {
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$ret['message'] = t('Cannot locate file to replace');
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return $ret;
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}
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$existing_id = $x[0]['id'];
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$existing_size = intval($x[0]['filesize']);
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$hash = $x[0]['hash'];
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}
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if($options === 'revise' || $options === 'update') {
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$sql_options = " order by revision desc ";
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if($options === 'update' && $arr && array_key_exists('revision',$arr))
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$sql_options = " and revision = " . intval($arr['revision']) . " ";
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$x =q("select id, aid, uid, filename, filetype, filesize, hash, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where hash = '%s' and uid = %d $sql_options limit 1",
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dbesc($arr['hash']),
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intval($channel_id)
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);
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if(! $x) {
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$ret['message'] = t('Cannot locate file to revise/update');
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return $ret;
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}
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$hash = $x[0]['hash'];
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}
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// Check storage limits
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if($options !== 'update') {
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$maxfilesize = get_config('system','maxfilesize');
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if(($maxfilesize) && ($filesize > $maxfilesize)) {
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$ret['message'] = sprintf( t('File exceeds size limit of %d'), $maxfilesize);
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@unlink($src);
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return $ret;
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}
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$limit = service_class_fetch($channel_id,'attach_upload_limit');
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if($limit !== false) {
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$r = q("select sum(filesize) as total from attach where uid = %d ",
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intval($channel_id)
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);
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if(($r) && (($r[0]['total'] + $filesize) > ($limit - $existing_size))) {
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$ret['message'] = upgrade_message(true);
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@unlink($src);
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return $ret;
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}
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}
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$mimetype = z_mime_content_type($filename);
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}
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if(! isset($hash))
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$hash = random_string();
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$created = datetime_convert();
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if($options === 'replace') {
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$r = q("update attach set filename = '%s', filetype = '%s', filesize = %d, data = '%s', edited = '%s' where id = %d and uid = %d limit 1",
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dbesc($filename),
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dbesc($mimetype),
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intval($filesize),
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dbesc(@file_get_contents($src)),
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dbesc($created),
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intval($existing_id),
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intval($channel_id)
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);
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}
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elseif($options === 'revise') {
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$r = q("insert into attach ( aid, uid, hash, filename, filetype, filesize, revision, data, created, edited, allow_cid, allow_gid, deny_cid, deny_gid )
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VALUES ( %d, %d, '%s', '%s', '%s', %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s' ) ",
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intval($x[0]['aid']),
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intval($channel_id),
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dbesc($x[0]['hash']),
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dbesc($filename),
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dbesc($mimetype),
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intval($filesize),
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intval($x[0]['revision'] + 1),
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dbesc(@file_get_contents($src)),
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dbesc($created),
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dbesc($created),
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dbesc($x[0]['allow_cid']),
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dbesc($x[0]['allow_gid']),
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dbesc($x[0]['deny_cid']),
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dbesc($x[0]['deny_gid'])
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);
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}
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elseif($options === 'update') {
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$r = q("update attach set filename = '%s', filetype = '%s', edited = '%s',
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allow_cid = '%s', allow_gid = '%s', deny_cid = '%s', deny_gid = '%s' where id = %d and uid = %d limit 1",
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dbesc((array_key_exists('filename',$arr)) ? $arr['filename'] : $x[0]['filename']),
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dbesc((array_key_exists('filetype',$arr)) ? $arr['filetype'] : $x[0]['filetype']),
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dbesc($created),
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dbesc((array_key_exists('allow_cid',$arr)) ? $arr['allow_cid'] : $x[0]['allow_cid']),
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dbesc((array_key_exists('allow_gid',$arr)) ? $arr['allow_gid'] : $x[0]['allow_gid']),
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dbesc((array_key_exists('deny_cid',$arr)) ? $arr['deny_cid'] : $x[0]['deny_cid']),
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dbesc((array_key_exists('deny_gid',$arr)) ? $arr['deny_gid'] : $x[0]['deny_gid']),
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intval($x[0]['id']),
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intval($x[0]['uid'])
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);
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}
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else {
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$r = q("INSERT INTO attach ( aid, uid, hash, filename, filetype, filesize, revision, data, created, edited, allow_cid, allow_gid,deny_cid, deny_gid )
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VALUES ( %d, %d, '%s', '%s', '%s', %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s' ) ",
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intval($channel['channel_account_id']),
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intval($channel_id),
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dbesc($hash),
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dbesc($filename),
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dbesc($mimetype),
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intval($filesize),
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intval(0),
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dbesc(@file_get_contents($src)),
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dbesc($created),
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dbesc($created),
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dbesc(($arr && array_key_exists('allow_cid',$arr)) ? $arr['allow_cid'] : '<' . $channel['channel_hash'] . '>'),
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dbesc(($arr && array_key_exists('allow_gid',$arr)) ? $arr['allow_gid'] : ''),
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dbesc(($arr && array_key_exists('deny_cid',$arr)) ? $arr['deny_cid'] : ''),
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dbesc(($arr && array_key_exists('deny_gid',$arr)) ? $arr['deny_gid'] : '')
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);
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}
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if($options !== 'update')
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@unlink($src);
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if(! $r) {
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$ret['message'] = t('File upload failed. Possible system limit or action terminated.');
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return $ret;
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}
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// Caution: This re-uses $sql_options set further above
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$r = q("select id, aid, uid, hash, filename, filetype, filesize, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where uid = %d and hash = '%s' $sql_options limit 1",
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intval($channel_id),
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dbesc($hash)
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);
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if(! $r) {
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$ret['message'] = t('Stored file could not be verified. Upload failed.');
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return $ret;
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}
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$ret['success'] = true;
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$ret['data'] = $r[0];
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return $ret;
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}
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/**
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* Read a virtual directory and return contents, checking permissions of all parent components.
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* @function z_readdir
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* @param integer $channel_id
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* @param string $observer_hash
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* @param string $pathname
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* @param string $parent_hash (optional)
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*
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* @returns array $ret
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* $ret['success'] = boolean true or false
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* $ret['message'] = error message if success is false
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* $ret['data'] = array of attach DB entries without data component
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*/
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function z_readdir($channel_id,$observer_hash,$pathname, $parent_hash = '') {
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$ret = array('success' => false);
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if(! perm_is_allowed($r[0]['uid'],get_observer_hash(),'view_storage')) {
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$ret['message'] = t('Permission denied.');
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return $ret;
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}
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if(strpos($pathname,'/')) {
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$paths = explode('/',$pathname);
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if(count($paths) > 1) {
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$curpath = array_shift($paths);
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$r = q("select hash, id from attach where uid = %d and filename = '%s' and (flags & %d ) " . permissions_sql($channel_id) . " limit 1",
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intval($channel_id),
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dbesc($curpath),
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intval(ATTACH_FLAG_DIR)
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);
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if(! $r) {
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$ret['message'] = t('Path not available.');
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return $ret;
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}
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return z_readdir($channel_id,$observer_hash,implode('/',$paths),$r[0]['hash']);
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}
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}
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else
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$paths = array($pathname);
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$r = q("select id, aid, uid, hash, filename, filetype, filesize, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where id = %d and folder = '%s' and filename = '%s' and (flags & %d ) " . permissions_sql($channel_id),
|
|
intval($channel_id),
|
|
dbesc($parent_hash),
|
|
dbesc($paths[0]),
|
|
intval(ATTACH_FLAG_DIR)
|
|
);
|
|
if(! $r) {
|
|
$ret['message'] = t('Path not available.');
|
|
return $ret;
|
|
}
|
|
$ret['success'] = true;
|
|
$ret['data'] = $r;
|
|
return $ret;
|
|
} |