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<?php
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/*
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+-----------------------------------------------------------------------+
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| program/steps/mail/get.inc |
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) 2005-2011, The Roundcube Dev Team |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| PURPOSE: |
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| Delivering a specific part of a mail message |
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+-----------------------------------------------------------------------+
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| Author: Thomas Bruederli <roundcube@gmail.com> |
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+-----------------------------------------------------------------------+
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*/
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// show loading page
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if (!empty($_GET['_preload'])) {
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$url = preg_replace('/([&?]+)_preload=/', '\\1_embed=', $_SERVER['REQUEST_URI']);
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$message = rcube_label('loadingdata');
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header('Content-Type: text/html; charset=' . RCMAIL_CHARSET);
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print "<html>\n<head>\n"
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. '<meta http-equiv="refresh" content="0; url='.Q($url).'">' . "\n"
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. '<meta http-equiv="content-type" content="text/html; charset='.RCMAIL_CHARSET.'">' . "\n"
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. "</head>\n<body>\n$message\n</body>\n</html>";
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exit;
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}
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ob_end_clean();
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// similar code as in program/steps/mail/show.inc
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if (!empty($_GET['_uid'])) {
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$RCMAIL->config->set('prefer_html', true);
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$MESSAGE = new rcube_message(get_input_value('_uid', RCUBE_INPUT_GET));
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}
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// check connection status
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check_storage_status();
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// show part page
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if (!empty($_GET['_frame'])) {
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if (($part_id = get_input_value('_part', RCUBE_INPUT_GPC)) && ($part = $MESSAGE->mime_parts[$part_id])) {
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$filename = $part->filename;
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if (empty($filename) && $part->mimetype == 'text/html') {
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$filename = rcube_label('htmlmessage');
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}
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if (!empty($filename)) {
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$OUTPUT->set_pagetitle($filename);
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}
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}
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$OUTPUT->send('messagepart');
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exit;
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}
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else if (strlen($pid = get_input_value('_part', RCUBE_INPUT_GET))) {
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if ($part = $MESSAGE->mime_parts[$pid]) {
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$ctype_primary = strtolower($part->ctype_primary);
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$ctype_secondary = strtolower($part->ctype_secondary);
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$mimetype = sprintf('%s/%s', $ctype_primary, $ctype_secondary);
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// allow post-processing of the message body
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$plugin = $RCMAIL->plugins->exec_hook('message_part_get',
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array('uid' => $MESSAGE->uid, 'id' => $part->mime_id, 'mimetype' => $mimetype, 'part' => $part, 'download' => !empty($_GET['_download'])));
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if ($plugin['abort'])
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exit;
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// overwrite modified vars from plugin
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$mimetype = $plugin['mimetype'];
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// TIFF to JPEG conversion, if needed
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$tiff_support = !empty($_SESSION['browser_caps']) && !empty($_SESSION['browser_caps']['tif']);
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if (!empty($_REQUEST['_embed']) && !$tiff_support
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&& $RCMAIL->config->get('im_convert_path')
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&& rcmail_part_image_type($part) == 'image/tiff'
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) {
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$tiff2jpeg = true;
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$mimetype = 'image/jpeg';
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}
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list($ctype_primary, $ctype_secondary) = explode('/', $mimetype);
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if ($plugin['body'])
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$part->body = $plugin['body'];
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$browser = $RCMAIL->output->browser;
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// send download headers
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if ($plugin['download']) {
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header("Content-Type: application/octet-stream");
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if ($browser->ie)
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header("Content-Type: application/force-download");
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}
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else if ($ctype_primary == 'text') {
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header("Content-Type: text/$ctype_secondary; charset=" . ($part->charset ? $part->charset : RCMAIL_CHARSET));
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}
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else {
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$mimetype = rcmail_fix_mimetype($mimetype);
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header("Content-Type: $mimetype");
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header("Content-Transfer-Encoding: binary");
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}
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// deliver part content
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if ($ctype_primary == 'text' && $ctype_secondary == 'html' && empty($plugin['download'])) {
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// Check if we have enough memory to handle the message in it
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// #1487424: we need up to 10x more memory than the body
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if (!rcmail_mem_check($part->size * 10)) {
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$out = '<body>' . rcube_label('messagetoobig'). ' '
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. html::a('?_task=mail&_action=get&_download=1&_uid='.$MESSAGE->uid.'&_part='.$part->mime_id
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.'&_mbox='. urlencode($RCMAIL->storage->get_folder()), rcube_label('download')) . '</body></html>';
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}
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else {
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// get part body if not available
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if (!$part->body)
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$part->body = $MESSAGE->get_part_content($part->mime_id);
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$out = rcmail_print_body($part, array('safe' => $MESSAGE->is_safe, 'inline_html' => false));
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}
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// check connection status
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if ($part->size && empty($part->body)) {
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check_storage_status();
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}
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$OUTPUT = new rcube_output_html();
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$OUTPUT->write($out);
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}
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else {
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// don't kill the connection if download takes more than 30 sec.
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@set_time_limit(0);
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if ($part->filename) {
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$filename = $part->filename;
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}
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else if ($part->mimetype == 'text/html') {
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$filename = rcube_label('htmlmessage');
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}
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else {
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$ext = '.' . ($mimetype == 'text/plain' ? 'txt' : $ctype_secondary);
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$filename = ($MESSAGE->subject ? $MESSAGE->subject : 'roundcube') . $ext;
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}
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$filename = preg_replace('[\r\n]', '', $filename);
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if ($browser->ie && $browser->ver < 7)
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$filename = rawurlencode(abbreviate_string($filename, 55));
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else if ($browser->ie)
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$filename = rawurlencode($filename);
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else
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$filename = addcslashes($filename, '"');
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$disposition = !empty($plugin['download']) ? 'attachment' : 'inline';
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header("Content-Disposition: $disposition; filename=\"$filename\"");
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// handle tiff to jpeg conversion
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if (!empty($tiff2jpeg)) {
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$temp_dir = unslashify($RCMAIL->config->get('temp_dir'));
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$file_path = tempnam($temp_dir, 'rcmAttmnt');
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// write content to temp file
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if ($part->body) {
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$saved = file_put_contents($file_path, $part->body);
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}
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else if ($part->size) {
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$fd = fopen($file_path, 'w');
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$saved = $RCMAIL->storage->get_message_part($MESSAGE->uid, $part->mime_id, $part, false, $fd);
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fclose($fd);
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}
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// convert image to jpeg and send it to the browser
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if ($saved) {
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$image = new rcube_image($file_path);
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if ($image->convert(rcube_image::TYPE_JPG, $file_path)) {
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header("Content-Length: " . filesize($file_path));
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readfile($file_path);
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}
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unlink($file_path);
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}
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}
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// do content filtering to avoid XSS through fake images
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else if (!empty($_REQUEST['_embed']) && $browser->ie && $browser->ver <= 8) {
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if ($part->body) {
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echo preg_match('/<(script|iframe|object)/i', $part->body) ? '' : $part->body;
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$sent = true;
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}
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else if ($part->size) {
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$stdout = fopen('php://output', 'w');
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stream_filter_register('rcube_content', 'rcube_content_filter') or die('Failed to register content filter');
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stream_filter_append($stdout, 'rcube_content');
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$sent = $RCMAIL->storage->get_message_part($MESSAGE->uid, $part->mime_id, $part, false, $stdout);
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}
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}
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// send part as-it-is
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else {
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if ($part->body) {
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header("Content-Length: " . sizeof($part->body));
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echo $part->body;
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$sent = true;
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}
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else if ($part->size) {
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if ($size = (int)$part->d_parameters['size']) {
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header("Content-Length: $size");
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}
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$sent = $RCMAIL->storage->get_message_part($MESSAGE->uid, $part->mime_id, $part, true);
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}
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}
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// check connection status
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if ($part->size && !$sent) {
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check_storage_status();
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}
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}
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exit;
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}
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}
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// print message
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else {
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// send correct headers for content type
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header("Content-Type: text/html");
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$cont = "<html>\n<head><title></title>\n</head>\n<body>";
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$cont .= rcmail_message_body(array());
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$cont .= "\n</body>\n</html>";
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$OUTPUT = new rcube_html_page();
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$OUTPUT->write($cont);
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exit;
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}
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// if we arrive here, the requested part was not found
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header('HTTP/1.1 404 Not Found');
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exit;
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function check_storage_status()
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{
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$error = rcmail::get_instance()->storage->get_error_code();
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// Check if we have a connection error
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if ($error == rcube_imap_generic::ERROR_BAD) {
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ob_end_clean();
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// Get action is often executed simultanously.
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// Some servers have MAXPERIP or other limits.
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// To workaround this we'll wait for some time
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// and try again (once).
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// Note: Random sleep interval is used to minimize concurency
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// in getting message parts
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if (!isset($_GET['_redirected'])) {
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usleep(rand(10,30)*100000); // 1-3 sec.
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header('Location: ' . $_SERVER['REQUEST_URI'] . '&_redirected=1');
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}
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else {
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raise_error(array(
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'code' => 500, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => 'Unable to get/display message part. IMAP connection error'),
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true, true);
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}
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// Don't kill session, just quit (#1486995)
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exit;
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}
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}
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