You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
535 lines
20 KiB
PHP
535 lines
20 KiB
PHP
<?php
|
|
|
|
/**
|
|
+-----------------------------------------------------------------------+
|
|
| program/steps/mail/get.inc |
|
|
| |
|
|
| This file is part of the Roundcube Webmail client |
|
|
| Copyright (C) 2005-2013, The Roundcube Dev Team |
|
|
| |
|
|
| Licensed under the GNU General Public License version 3 or |
|
|
| any later version with exceptions for skins & plugins. |
|
|
| See the README file for a full license statement. |
|
|
| |
|
|
| PURPOSE: |
|
|
| Delivering a specific part of a mail message |
|
|
| |
|
|
+-----------------------------------------------------------------------+
|
|
| Author: Thomas Bruederli <roundcube@gmail.com> |
|
|
+-----------------------------------------------------------------------+
|
|
*/
|
|
|
|
|
|
// show loading page
|
|
if (!empty($_GET['_preload'])) {
|
|
$_get = $_GET + array('_mimewarning' => 1, '_embed' => 1);
|
|
unset($_get['_preload']);
|
|
$url = $RCMAIL->url($_get);
|
|
$message = $RCMAIL->gettext('loadingdata');
|
|
|
|
header('Content-Type: text/html; charset=' . RCUBE_CHARSET);
|
|
print "<html>\n<head>\n"
|
|
. '<meta http-equiv="refresh" content="0; url='.rcube::Q($url).'">' . "\n"
|
|
. '<meta http-equiv="content-type" content="text/html; charset='.RCUBE_CHARSET.'">' . "\n"
|
|
. "</head>\n<body>\n$message\n</body>\n</html>";
|
|
exit;
|
|
}
|
|
|
|
ob_end_clean();
|
|
|
|
// similar code as in program/steps/mail/show.inc
|
|
if (!empty($_GET['_uid'])) {
|
|
$uid = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_GET);
|
|
$RCMAIL->config->set('prefer_html', true);
|
|
$MESSAGE = new rcube_message($uid, null, intval($_GET['_safe']));
|
|
}
|
|
|
|
// check connection status
|
|
check_storage_status();
|
|
|
|
$part_id = rcube_utils::get_input_value('_part', rcube_utils::INPUT_GPC);
|
|
|
|
// show part page
|
|
if (!empty($_GET['_frame'])) {
|
|
if ($part_id && ($part = $MESSAGE->mime_parts[$part_id])) {
|
|
$filename = rcmail_attachment_name($part);
|
|
$OUTPUT->set_pagetitle($filename);
|
|
}
|
|
|
|
// register UI objects
|
|
$OUTPUT->add_handlers(array(
|
|
'messagepartframe' => 'rcmail_message_part_frame',
|
|
'messagepartcontrols' => 'rcmail_message_part_controls',
|
|
));
|
|
|
|
$OUTPUT->set_env('mailbox', $RCMAIL->storage->get_folder());
|
|
$OUTPUT->set_env('uid', $uid);
|
|
$OUTPUT->set_env('part', $part_id);
|
|
$OUTPUT->set_env('filename', $filename);
|
|
|
|
$OUTPUT->send('messagepart');
|
|
exit;
|
|
}
|
|
|
|
// render thumbnail of an image attachment
|
|
else if ($_GET['_thumb']) {
|
|
$pid = rcube_utils::get_input_value('_part', rcube_utils::INPUT_GET);
|
|
if ($part = $MESSAGE->mime_parts[$pid]) {
|
|
$thumbnail_size = $RCMAIL->config->get('image_thumbnail_size', 240);
|
|
$temp_dir = $RCMAIL->config->get('temp_dir');
|
|
$mimetype = $part->mimetype;
|
|
$file_ident = $MESSAGE->headers->messageID . ':' . $part->mime_id . ':' . $part->size . ':' . $part->mimetype;
|
|
$cache_basename = $temp_dir . '/' . md5($file_ident . ':' . $RCMAIL->user->ID . ':' . $thumbnail_size);
|
|
$cache_file = $cache_basename . '.thumb';
|
|
|
|
// render thumbnail image if not done yet
|
|
if (!is_file($cache_file)) {
|
|
if ($fp = fopen(($orig_name = $cache_basename . '.tmp'), 'w')) {
|
|
$MESSAGE->get_part_body($part->mime_id, false, 0, $fp);
|
|
fclose($fp);
|
|
|
|
$image = new rcube_image($orig_name);
|
|
if ($imgtype = $image->resize($thumbnail_size, $cache_file, true)) {
|
|
$mimetype = 'image/' . $imgtype;
|
|
unlink($orig_name);
|
|
}
|
|
else if (stripos($mimetype, 'image/svg') === 0) {
|
|
$content = rcmail_svg_filter(file_get_contents($orig_name));
|
|
file_put_contents($cache_file, $content);
|
|
unlink($orig_name);
|
|
}
|
|
else {
|
|
rename($orig_name, $cache_file);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (is_file($cache_file)) {
|
|
header('Content-Type: ' . $mimetype);
|
|
readfile($cache_file);
|
|
}
|
|
}
|
|
|
|
exit;
|
|
}
|
|
else if (strlen($part_id)) {
|
|
if ($part = $MESSAGE->mime_parts[$part_id]) {
|
|
$mimetype = rcmail_fix_mimetype($part->mimetype);
|
|
|
|
// allow post-processing of the message body
|
|
$plugin = $RCMAIL->plugins->exec_hook('message_part_get', array(
|
|
'uid' => $MESSAGE->uid,
|
|
'id' => $part->mime_id,
|
|
'mimetype' => $mimetype,
|
|
'part' => $part,
|
|
'download' => !empty($_GET['_download'])
|
|
));
|
|
|
|
if ($plugin['abort']) {
|
|
exit;
|
|
}
|
|
|
|
// overwrite modified vars from plugin
|
|
$mimetype = $plugin['mimetype'];
|
|
$extensions = rcube_mime::get_mime_extensions($mimetype);
|
|
|
|
if ($plugin['body']) {
|
|
$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)$extensions) || empty($extensions) || !empty($_REQUEST['_mimeclass']);
|
|
|
|
// 2. detect the real mimetype of the attachment part and compare it with the stated mimetype and filename extension
|
|
if ($valid || !$file_extension || $mimetype == 'application/octet-stream' || stripos($mimetype, 'text/') === 0) {
|
|
$tmp_body = $body ?: $MESSAGE->get_part_body($part->mime_id, false, 2048);
|
|
|
|
// detect message part mimetype
|
|
$real_mimetype = rcube_mime::file_content_type($tmp_body, $part->filename, $mimetype, true, true);
|
|
list($real_ctype_primary, $real_ctype_secondary) = explode('/', $real_mimetype);
|
|
|
|
// accept text/plain with any extension
|
|
if ($real_mimetype == 'text/plain' && $real_mimetype == $mimetype) {
|
|
$valid_extension = true;
|
|
}
|
|
// ignore differences in text/* mimetypes. Filetype detection isn't very reliable here
|
|
else if ($real_ctype_primary == 'text' && strpos($mimetype, $real_ctype_primary) === 0) {
|
|
$real_mimetype = $mimetype;
|
|
$valid_extension = true;
|
|
}
|
|
// ignore filename extension if mimeclass matches (#1489029)
|
|
else if (!empty($_REQUEST['_mimeclass']) && $real_ctype_primary == $_REQUEST['_mimeclass']) {
|
|
$valid_extension = true;
|
|
}
|
|
else {
|
|
// get valid file extensions
|
|
$extensions = rcube_mime::get_mime_extensions($real_mimetype);
|
|
$valid_extension = !$file_extension || empty($extensions) || in_array($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;
|
|
}
|
|
|
|
// "fix" real mimetype the same way the original is before comparison
|
|
$real_mimetype = rcmail_fix_mimetype($real_mimetype);
|
|
|
|
$valid = $real_mimetype == $mimetype && $valid_extension;
|
|
}
|
|
else {
|
|
$real_mimetype = $mimetype;
|
|
}
|
|
|
|
// show warning if validity checks failed
|
|
if (!$valid) {
|
|
// send blocked.gif for expected images
|
|
if (empty($_REQUEST['_mimewarning']) && strpos($mimetype, 'image/') === 0) {
|
|
// Do not cache. Failure might be the result of a misconfiguration, thus real content should be returned once fixed.
|
|
$content = $RCMAIL->get_resource_content('blocked.gif');
|
|
$OUTPUT->nocacheing_headers();
|
|
header("Content-Type: image/gif");
|
|
header("Content-Transfer-Encoding: binary");
|
|
header("Content-Length: " . strlen($content));
|
|
echo $content;
|
|
}
|
|
else { // html warning with a button to load the file anyway
|
|
$OUTPUT = new rcmail_html_page();
|
|
$OUTPUT->write(html::tag('html', null, html::tag('body', 'embed',
|
|
html::div(array('class' => 'rcmail-inline-message rcmail-inline-warning'),
|
|
$RCMAIL->gettext(array(
|
|
'name' => 'attachmentvalidationerror',
|
|
'vars' => array(
|
|
'expected' => $mimetype . ($file_extension ? " (.$file_extension)" : ''),
|
|
'detected' => $real_mimetype . ($extensions[0] ? " (.$extensions[0])" : ''),
|
|
)
|
|
))
|
|
. html::p(array('class' => 'rcmail-inline-buttons'),
|
|
html::tag('button', array(
|
|
'onclick' => "location.href='" . $RCMAIL->url(array_merge($_GET, array('_nocheck' => 1))) . "'"
|
|
),
|
|
$RCMAIL->gettext('showanyway'))
|
|
)
|
|
))));
|
|
}
|
|
|
|
exit;
|
|
}
|
|
}
|
|
|
|
|
|
// TIFF to JPEG conversion, if needed
|
|
$tiff_support = !empty($_SESSION['browser_caps']) && !empty($_SESSION['browser_caps']['tif']);
|
|
if (!empty($_REQUEST['_embed']) && !$tiff_support
|
|
&& rcube_image::is_convertable('image/tiff')
|
|
&& rcmail_part_image_type($part) == 'image/tiff'
|
|
) {
|
|
$tiff2jpeg = true;
|
|
$mimetype = 'image/jpeg';
|
|
}
|
|
|
|
|
|
$browser = $RCMAIL->output->browser;
|
|
list($ctype_primary, $ctype_secondary) = explode('/', $mimetype);
|
|
|
|
if (!$plugin['download'] && $ctype_primary == 'text') {
|
|
header("Content-Type: text/$ctype_secondary; charset=" . ($part->charset ?: RCUBE_CHARSET));
|
|
}
|
|
else {
|
|
header("Content-Type: $mimetype");
|
|
header("Content-Transfer-Encoding: binary");
|
|
}
|
|
|
|
// deliver part content
|
|
if ($ctype_primary == 'text' && $ctype_secondary == 'html' && empty($plugin['download'])) {
|
|
// Check if we have enough memory to handle the message in it
|
|
// #1487424: we need up to 10x more memory than the body
|
|
if (!rcube_utils::mem_check($part->size * 10)) {
|
|
$out = '<body>' . $RCMAIL->gettext('messagetoobig'). ' '
|
|
. html::a('?_task=mail&_action=get&_download=1&_uid='.$MESSAGE->uid.'&_part='.$part->mime_id
|
|
.'&_mbox='. urlencode($MESSAGE->folder), $RCMAIL->gettext('download')) . '</body></html>';
|
|
}
|
|
else {
|
|
// get part body if not available
|
|
if (!isset($body)) {
|
|
$body = $MESSAGE->get_part_body($part->mime_id, true);
|
|
}
|
|
|
|
// show images?
|
|
rcmail_check_safe($MESSAGE);
|
|
|
|
// render HTML body
|
|
$out = rcmail_print_body($body, $part, array('safe' => $MESSAGE->is_safe, 'inline_html' => false));
|
|
|
|
// insert remote objects warning into HTML body
|
|
if ($REMOTE_OBJECTS) {
|
|
$body_start = 0;
|
|
if ($body_pos = strpos($out, '<body')) {
|
|
$body_start = strpos($out, '>', $body_pos) + 1;
|
|
}
|
|
|
|
$out = substr($out, 0, $body_start)
|
|
. html::div(array('class' => 'rcmail-inline-message rcmail-inline-warning'),
|
|
rcube::Q($RCMAIL->gettext('blockedimages')) . ' ' .
|
|
html::tag('button',
|
|
array('onclick' => "location.href='" . $RCMAIL->url(array_merge($_GET, array('_safe' => 1))) . "'"),
|
|
rcube::Q($RCMAIL->gettext('showimages')))
|
|
)
|
|
. substr($out, $body_start);
|
|
}
|
|
}
|
|
|
|
// check connection status
|
|
if ($part->size && empty($body)) {
|
|
check_storage_status();
|
|
}
|
|
|
|
$OUTPUT = new rcmail_html_page();
|
|
$OUTPUT->write($out);
|
|
}
|
|
else {
|
|
// don't kill the connection if download takes more than 30 sec.
|
|
@set_time_limit(0);
|
|
|
|
$filename = rcmail_attachment_name($part);
|
|
|
|
if ($browser->ie)
|
|
$filename = rawurlencode($filename);
|
|
else
|
|
$filename = addcslashes($filename, '"');
|
|
|
|
$disposition = !empty($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 ($body) {
|
|
$saved = file_put_contents($file_path, $body);
|
|
}
|
|
else if ($part->size) {
|
|
$fd = fopen($file_path, 'w');
|
|
$saved = $MESSAGE->get_part_body($part->mime_id, false, 0, $fd);
|
|
fclose($fd);
|
|
}
|
|
|
|
// convert image to jpeg and send it to the browser
|
|
if ($sent = $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);
|
|
}
|
|
}
|
|
else {
|
|
$sent = rcmail_message_part_output($body, $part, $mimetype, $plugin['download']);
|
|
}
|
|
|
|
// check connection status
|
|
if ($part->size && !$sent) {
|
|
check_storage_status();
|
|
}
|
|
}
|
|
|
|
exit;
|
|
}
|
|
}
|
|
// print message
|
|
else {
|
|
// send correct headers for content type
|
|
header("Content-Type: text/html");
|
|
|
|
$cont = "<html>\n<head><title></title>\n</head>\n<body>";
|
|
$cont .= rcmail_message_body(array());
|
|
$cont .= "\n</body>\n</html>";
|
|
|
|
$OUTPUT = new rcmail_html_page();
|
|
$OUTPUT->write($cont);
|
|
|
|
exit;
|
|
}
|
|
|
|
|
|
// if we arrive here, the requested part was not found
|
|
header('HTTP/1.1 404 Not Found');
|
|
exit;
|
|
|
|
/**
|
|
* Handles nicely storage connection errors
|
|
*/
|
|
function check_storage_status()
|
|
{
|
|
$error = rcmail::get_instance()->storage->get_error_code();
|
|
|
|
// Check if we have a connection error
|
|
if ($error == rcube_imap_generic::ERROR_BAD) {
|
|
ob_end_clean();
|
|
|
|
// Get action is often executed simultanously.
|
|
// Some servers have MAXPERIP or other limits.
|
|
// To workaround this we'll wait for some time
|
|
// and try again (once).
|
|
// Note: Random sleep interval is used to minimize concurency
|
|
// in getting message parts
|
|
|
|
if (!isset($_GET['_redirected'])) {
|
|
usleep(rand(10,30)*100000); // 1-3 sec.
|
|
header('Location: ' . $_SERVER['REQUEST_URI'] . '&_redirected=1');
|
|
}
|
|
else {
|
|
rcube::raise_error(array(
|
|
'code' => 500, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => 'Unable to get/display message part. IMAP connection error'),
|
|
true, true);
|
|
}
|
|
|
|
// Don't kill session, just quit (#1486995)
|
|
exit;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Attachment properties table
|
|
*/
|
|
function rcmail_message_part_controls($attrib)
|
|
{
|
|
global $MESSAGE, $RCMAIL;
|
|
|
|
$part = asciiwords(rcube_utils::get_input_value('_part', rcube_utils::INPUT_GPC));
|
|
if (!is_object($MESSAGE) || !is_array($MESSAGE->parts)
|
|
|| !($_GET['_uid'] && $_GET['_part']) || !$MESSAGE->mime_parts[$part]
|
|
) {
|
|
return '';
|
|
}
|
|
|
|
$part = $MESSAGE->mime_parts[$part];
|
|
$table = new html_table(array('cols' => 2));
|
|
|
|
$table->add('title', rcube::Q($RCMAIL->gettext('namex')).':');
|
|
$table->add('header', rcube::Q(rcmail_attachment_name($part)));
|
|
|
|
$table->add('title', rcube::Q($RCMAIL->gettext('type')).':');
|
|
$table->add('header', rcube::Q($part->mimetype));
|
|
|
|
$table->add('title', rcube::Q($RCMAIL->gettext('size')).':');
|
|
$table->add('header', rcube::Q($RCMAIL->message_part_size($part)));
|
|
|
|
return $table->show($attrib);
|
|
}
|
|
|
|
/**
|
|
* Attachment preview frame
|
|
*/
|
|
function rcmail_message_part_frame($attrib)
|
|
{
|
|
global $MESSAGE, $RCMAIL;
|
|
|
|
$part = $MESSAGE->mime_parts[asciiwords(rcube_utils::get_input_value('_part', rcube_utils::INPUT_GPC))];
|
|
$ctype_primary = strtolower($part->ctype_primary);
|
|
|
|
$attrib['src'] = './?' . str_replace('_frame=', ($ctype_primary=='text' ? '_embed=' : '_preload='), $_SERVER['QUERY_STRING']);
|
|
|
|
$RCMAIL->output->add_gui_object('messagepartframe', $attrib['id']);
|
|
|
|
return html::iframe($attrib);
|
|
}
|
|
|
|
/**
|
|
* Output attachment body with content filtering
|
|
*/
|
|
function rcmail_message_part_output($body, $part, $mimetype, $download)
|
|
{
|
|
global $MESSAGE, $RCMAIL;
|
|
|
|
if (!$part->size && !$body) {
|
|
return false;
|
|
}
|
|
|
|
$browser = $RCMAIL->output->browser;
|
|
$secure = stripos($mimetype, 'image/') === false || $download;
|
|
|
|
// Remove <script> in SVG images
|
|
if (!$secure && stripos($mimetype, 'image/svg') === 0) {
|
|
if (!$body) {
|
|
$body = $MESSAGE->get_part_body($part->mime_id, false);
|
|
if (empty($body)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
echo rcmail_svg_filter($body);
|
|
return true;
|
|
}
|
|
|
|
// Remove dangerous content in images for older IE (to be removed)
|
|
if (!$secure && $browser->ie && $browser->ver <= 8) {
|
|
if ($body) {
|
|
echo preg_match('/<(script|iframe|object)/i', $body) ? '' : $body;
|
|
return true;
|
|
}
|
|
else {
|
|
$stdout = fopen('php://output', 'w');
|
|
stream_filter_register('rcube_content', 'rcube_content_filter') or die('Failed to register content filter');
|
|
stream_filter_append($stdout, 'rcube_content');
|
|
return $MESSAGE->get_part_body($part->mime_id, true, 0, $stdout);
|
|
}
|
|
}
|
|
|
|
if ($body && !$download) {
|
|
header("Content-Length: " . strlen($body));
|
|
echo $body;
|
|
return true;
|
|
}
|
|
|
|
// Don't be tempted to set Content-Length to $part->d_parameters['size'] (#1490482)
|
|
// RFC2183 says "The size parameter indicates an approximate size"
|
|
|
|
return $MESSAGE->get_part_body($part->mime_id, false, 0, -1);
|
|
}
|
|
|
|
/**
|
|
* Remove <script> in SVG images
|
|
*/
|
|
function rcmail_svg_filter($body)
|
|
{
|
|
// clean SVG with washhtml
|
|
$wash_opts = array(
|
|
'show_washed' => false,
|
|
'allow_remote' => false,
|
|
'charset' => RCUBE_CHARSET,
|
|
'html_elements' => array('title'),
|
|
// 'blocked_src' => 'program/resources/blocked.gif',
|
|
);
|
|
|
|
// initialize HTML washer
|
|
$washer = new rcube_washtml($wash_opts);
|
|
|
|
// allow CSS styles, will be sanitized by rcmail_washtml_callback()
|
|
$washer->add_callback('style', 'rcmail_washtml_callback');
|
|
|
|
return $washer->wash($body);
|
|
}
|