Use short tags for php echo

[bizou.git] / plugins / tar / tar.php

diff --git a/plugins/tar/tar.php b/plugins/tar/tar.php
index add078d..9d3a46f 100644 (file)
--- a/plugins/tar/tar.php
+++ b/plugins/tar/tar.php
@@ -1,5 +1,32 @@
 <?php
+/*
+    Bizou - a (french) KISS php image gallery
+    Copyright (C) 2010  Marc MAURICE
 
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+# do not enable recursive tars by default
+$TAR_FLAGS = "--no-recursion";
+
+# send content length for browsers to display the progress bar
+# note : won't work if the http server uses Chunked transfer encoding (http://en.wikipedia.org/wiki/Chunked_transfer_encoding)
+# probably the case with gzip content-encoding.
+# For this we need to tar files to /dev/null before the real tar
+$SEND_CONTENT_LENGTH = true;
+
+########################
 $bizouRootFromHere = '../..';
 require "$bizouRootFromHere/config.php";
 
@@ -21,16 +48,26 @@ if ( ! is_dir($realDir) ) {
 # change to the parent directory
 chdir(dirname($realDir));
 
-$filesarg = escapeshellarg(basename($realDir))."/*";
+$filesarg = basename($realDir);
+# same as escapeshellarg function but this supports utf8 regardless of locale
+$filesarg = "'".str_replace("'", "'\\''", $filesarg)."'";
+$filesarg = "$filesarg/*";
+
+# compute and send content-length header
+if ($SEND_CONTENT_LENGTH) {
+       $out = exec("tar $TAR_FLAGS --totals -cf /dev/null $filesarg 2>&1", $output, $ret);
+       preg_match('/^Total bytes written: ([0-9]+) /', $out, $matches);
+       $totalsize = $matches[1];
 
-$out = exec("tar --no-recursion --totals -cf /dev/null $filesarg 2>&1");
-preg_match('/^Total bytes written: ([0-9]+) /', $out, $matches);
-$totalsize = $matches[1];
+       ($totalsize > 1000 and $ret === 0) or die("Could not tar: $filesarg. Try checking permissions.");
+
+       header("Content-Length: $totalsize");
+}
 
-header("Content-Length: $totalsize");
+# final step : stream the directory content via tar
 header('Content-Type: application/x-tar');
 header('Content-Disposition: attachment; filename="'.basename($realDir).'.tar"');
 
-passthru("tar --no-recursion -c $filesarg");
+passthru("tar $TAR_FLAGS -c $filesarg");
 
 ?>