From d9f180adf9e1e8a63ea9bfdb534dc376a4829fee Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <thomas@roundcube.net>
Date: Sat, 29 Dec 2012 10:54:41 -0500
Subject: [PATCH] Minor IE7/8 fixes
---
program/steps/mail/get.inc | 182 +++++++++++++++++++++++++++++++++++++++------
1 files changed, 158 insertions(+), 24 deletions(-)
diff --git a/program/steps/mail/get.inc b/program/steps/mail/get.inc
index 750011f..9d9032b 100644
--- a/program/steps/mail/get.inc
+++ b/program/steps/mail/get.inc
@@ -22,7 +22,7 @@
// show loading page
if (!empty($_GET['_preload'])) {
- $url = preg_replace('/[&?]+_preload=1/', '', $_SERVER['REQUEST_URI']);
+ $url = preg_replace('/([&?]+)_preload=/', '\\1_embed=', $_SERVER['REQUEST_URI']);
$message = rcube_label('loadingdata');
header('Content-Type: text/html; charset=' . RCMAIL_CHARSET);
@@ -47,16 +47,46 @@
// show part page
if (!empty($_GET['_frame'])) {
if (($part_id = get_input_value('_part', RCUBE_INPUT_GPC)) && ($part = $MESSAGE->mime_parts[$part_id])) {
- $filename = $part->filename;
- if (empty($filename) && $part->mimetype == 'text/html') {
- $filename = rcube_label('htmlmessage');
- }
- if (!empty($filename)) {
- $OUTPUT->set_pagetitle($filename);
- }
+ $OUTPUT->set_pagetitle(rcmail_attachment_name($part));
}
$OUTPUT->send('messagepart');
+ exit;
+}
+
+// render thumbnail of an image attachment
+else if ($_GET['_thumb']) {
+ $pid = get_input_value('_part', RCUBE_INPUT_GET);
+ if ($part = $MESSAGE->mime_parts[$pid]) {
+ $thumbnail_size = $RCMAIL->config->get('image_thumbnail_size', 240);
+ $temp_dir = $RCMAIL->config->get('temp_dir');
+ list(,$ext) = explode('/', $part->mimetype);
+ $cache_basename = $temp_dir . '/' . md5($MESSAGE->headers->messageID . $part->mime_id . ':' . $RCMAIL->user->ID . ':' . $thumbnail_size);
+ $cache_file = $cache_basename . '.' . $ext;
+ $mimetype = $part->mimetype;
+
+ // render thumbnail image if not done yet
+ if (!is_file($cache_file)) {
+ $fp = fopen(($orig_name = $cache_basename . '.orig.' . $ext), 'w');
+ $MESSAGE->get_part_content($part->mime_id, $fp);
+ fclose($fp);
+
+ $image = new rcube_image($orig_name);
+ if ($imgtype = $image->resize($RCMAIL->config->get('image_thumbnail_size', 240), $cache_file, true)) {
+ $mimetype = 'image/' . $imgtype;
+ unlink($orig_name);
+ }
+ else {
+ rename($orig_name, $cache_file);
+ }
+ }
+
+ if (is_file($cache_file)) {
+ header('Content-Type: ' . $mimetype);
+ readfile($cache_file);
+ }
+ }
+
exit;
}
@@ -76,11 +106,83 @@
// overwrite modified vars from plugin
$mimetype = $plugin['mimetype'];
- list($ctype_primary, $ctype_secondary) = explode('/', $mimetype);
+ $extensions = rcube_mime::get_mime_extensions($mimetype);
+
if ($plugin['body'])
$part->body = $plugin['body'];
+
+ // compare file mimetype with the stated content-type headers and file extension to avoid malicious operations
+ if (!empty($_REQUEST['_embed']) && empty($_REQUEST['_nocheck'])) {
+ $file_extension = strtolower(pathinfo($part->filename, PATHINFO_EXTENSION));
+
+ // 1. compare filename suffix with expected suffix derived from mimetype
+ $valid = $file_extension && in_array($file_extension, (array)$extensions);
+
+ // 2. detect the real mimetype of the attachment part and compare it with the stated mimetype and filename extension
+ if ($valid || !$file_extension || $mimetype == 'application/octet-stream') {
+ if ($part->body) // part body is already loaded
+ $body = $part->body;
+ else if ($part->size && $part->size < 1024*1024) // load the entire part if it's small enough
+ $body = $part->body = $MESSAGE->get_part_content($part->mime_id);
+ else // fetch the first 2K of the message part
+ $body = $MESSAGE->get_part_content($part->mime_id, null, true, 2048);
+
+ // detect message part mimetype
+ $real_mimetype = rcube_mime::file_content_type($body, $part->filename, $mimetype, true, true);
+ list($real_ctype_primary, $real_ctype_secondary) = explode('/', $real_mimetype);
+
+ // ignore differences in text/* mimetypes. Filetype detection isn't very reliable here
+ if ($real_ctype_primary == 'text' && strpos($mimetype, $real_ctype_primary) === 0)
+ $real_mimetype = $mimetype;
+
+ // get valid file extensions
+ $extensions = rcube_mime::get_mime_extensions($real_mimetype);
+ $valid_extension = (!$file_extension || in_array($file_extension, (array)$extensions));
+
+ // fix mimetype for images wrongly declared as octet-stream
+ if ($mimetype == 'application/octet-stream' && strpos($real_mimetype, 'image/') === 0 && $valid_extension)
+ $mimetype = $real_mimetype;
+
+ $valid = ($real_mimetype == $mimetype && $valid_extension);
+ }
+ else {
+ $real_mimetype = $mimetype;
+ }
+
+ // show warning if validity checks failed
+ if (!$valid) {
+ $OUTPUT = new rcmail_html_page();
+ $OUTPUT->write(html::tag('html', null, html::tag('body', array('style' => 'font-family:sans-serif; margin:1em'),
+ html::div(array('class' => 'warning', 'style' => 'border:2px solid #ffdf0e; background:#fef893; padding:1em 1em 0 1em;'),
+ rcube_label(array(
+ 'name' => 'attachmentvalidationerror',
+ 'vars' => array('expected' => "$mimetype (.$file_extension)", 'detected' => "$real_mimetype (.$extensions[0])")
+ )) .
+ html::p('buttons',
+ html::tag('button',
+ array('onclick' => "location.href='" . $RCMAIL->url(array_merge($_GET, array('_nocheck' => 1))) . "'"),
+ rcube_label('showanyway')))
+ )
+ )));
+ exit;
+ }
+ }
+
+
+ // TIFF to JPEG conversion, if needed
+ $tiff_support = !empty($_SESSION['browser_caps']) && !empty($_SESSION['browser_caps']['tif']);
+ if (!empty($_REQUEST['_embed']) && !$tiff_support
+ && $RCMAIL->config->get('im_convert_path')
+ && rcmail_part_image_type($part) == 'image/tiff'
+ ) {
+ $tiff2jpeg = true;
+ $mimetype = 'image/jpeg';
+ }
+
+
$browser = $RCMAIL->output->browser;
+ list($ctype_primary, $ctype_secondary) = explode('/', $mimetype);
// send download headers
if ($plugin['download']) {
@@ -96,6 +198,7 @@
header("Content-Type: $mimetype");
header("Content-Transfer-Encoding: binary");
}
+
// deliver part content
if ($ctype_primary == 'text' && $ctype_secondary == 'html' && empty($plugin['download'])) {
@@ -119,25 +222,14 @@
check_storage_status();
}
- $OUTPUT = new rcube_output_html();
+ $OUTPUT = new rcube_html_page();
$OUTPUT->write($out);
}
else {
// don't kill the connection if download takes more than 30 sec.
@set_time_limit(0);
- if ($part->filename) {
- $filename = $part->filename;
- }
- else if ($part->mimetype == 'text/html') {
- $filename = rcube_label('htmlmessage');
- }
- else {
- $ext = '.' . ($mimetype == 'text/plain' ? 'txt' : $ctype_secondary);
- $filename = ($MESSAGE->subject ? $MESSAGE->subject : 'roundcube') . $ext;
- }
-
- $filename = preg_replace('[\r\n]', '', $filename);
+ $filename = rcmail_attachment_name($part);
if ($browser->ie && $browser->ver < 7)
$filename = rawurlencode(abbreviate_string($filename, 55));
@@ -148,10 +240,47 @@
$disposition = !empty($plugin['download']) ? 'attachment' : 'inline';
+ // Workaround for nasty IE bug (#1488844)
+ // If Content-Disposition header contains string "attachment" e.g. in filename
+ // IE handles data as attachment not inline
+ if ($disposition == 'inline' && $browser->ie && $browser->ver < 9) {
+ $filename = str_ireplace('attachment', 'attach', $filename);
+ }
+
+ // add filename extension if missing
+ if (!pathinfo($filename, PATHINFO_EXTENSION) && ($extensions = rcube_mime::get_mime_extensions($mimetype))) {
+ $filename .= '.' . $extensions[0];
+ }
+
header("Content-Disposition: $disposition; filename=\"$filename\"");
+ // handle tiff to jpeg conversion
+ if (!empty($tiff2jpeg)) {
+ $temp_dir = unslashify($RCMAIL->config->get('temp_dir'));
+ $file_path = tempnam($temp_dir, 'rcmAttmnt');
+
+ // write content to temp file
+ if ($part->body) {
+ $saved = file_put_contents($file_path, $part->body);
+ }
+ else if ($part->size) {
+ $fd = fopen($file_path, 'w');
+ $saved = $RCMAIL->storage->get_message_part($MESSAGE->uid, $part->mime_id, $part, false, $fd);
+ fclose($fd);
+ }
+
+ // convert image to jpeg and send it to the browser
+ if ($saved) {
+ $image = new rcube_image($file_path);
+ if ($image->convert(rcube_image::TYPE_JPG, $file_path)) {
+ header("Content-Length: " . filesize($file_path));
+ readfile($file_path);
+ }
+ unlink($file_path);
+ }
+ }
// do content filtering to avoid XSS through fake images
- if (!empty($_REQUEST['_embed']) && $browser->ie && $browser->ver <= 8) {
+ else if (!empty($_REQUEST['_embed']) && $browser->ie && $browser->ver <= 8) {
if ($part->body) {
echo preg_match('/<(script|iframe|object)/i', $part->body) ? '' : $part->body;
$sent = true;
@@ -163,13 +292,18 @@
$sent = $RCMAIL->storage->get_message_part($MESSAGE->uid, $part->mime_id, $part, false, $stdout);
}
}
+ // send part as-it-is
else {
- // turn off output buffering and print part content
if ($part->body) {
+ header("Content-Length: " . strlen($part->body));
echo $part->body;
$sent = true;
}
else if ($part->size) {
+ if ($size = (int)$part->d_parameters['size']) {
+ header("Content-Length: $size");
+ }
+
$sent = $RCMAIL->storage->get_message_part($MESSAGE->uid, $part->mime_id, $part, true);
}
}
--
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