Revert r1670 but improve part download step by fixing headers and adding set_time_limit(0)

program/include/rcube_browser.php

@@ -38,11 +38,11 @@ class rcube_browser
         $this->linux = stristr($HTTP_USER_AGENT, 'linux');
         $this->unix  = stristr($HTTP_USER_AGENT, 'unix');
 
+        $this->opera = stristr($HTTP_USER_AGENT, 'opera');
         $this->ns4 = stristr($HTTP_USER_AGENT, 'mozilla/4') && !stristr($HTTP_USER_AGENT, 'msie');
         $this->ns  = ($this->ns4 || stristr($HTTP_USER_AGENT, 'netscape'));
-        $this->ie  = stristr($HTTP_USER_AGENT, 'msie');
+        $this->ie  = stristr($HTTP_USER_AGENT, 'compatible; msie') && !$this->opera;
         $this->mz  = stristr($HTTP_USER_AGENT, 'mozilla/5');
-        $this->opera = stristr($HTTP_USER_AGENT, 'opera');
         $this->safari = stristr($HTTP_USER_AGENT, 'safari');
 
         if ($this->ns) {

program/steps/mail/get.inc

@@ -54,6 +54,8 @@ else if ($pid = get_input_value('_part', RCUBE_INPUT_GET)) {
     $ctype_primary = strtolower($part->ctype_primary);
     $ctype_secondary = strtolower($part->ctype_secondary);
     $mimetype = sprintf('%s/%s', $ctype_primary, $ctype_secondary);
+    
+    $browser = new rcube_browser;
 
     header("Expires: 0");
     header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
@@ -62,11 +64,12 @@ else if ($pid = get_input_value('_part', RCUBE_INPUT_GET)) {
 
     // send download headers
     if ($_GET['_download']) {
-      header("Cache-Control: private", false);
       header("Content-Type: application/octet-stream");
+      if ($browser->ie)
+        header("Content-Type: application/force-download");
     }
     else if ($ctype_primary == 'text')
-      header("Content-Type: text/$ctype_secondary; charset=" . RCMAIL_CHARSET);
+      header("Content-Type: text/$ctype_secondary; charset=" . ($part->charset ? $part->charset : RCMAIL_CHARSET));
     else
       header("Content-Type: $mimetype");
 
@@ -78,20 +81,6 @@ else if ($pid = get_input_value('_part', RCUBE_INPUT_GET)) {
 
     // deliver part content
     if ($ctype_primary == 'text' && $ctype_secondary == 'html') {
-      // we have to analyze the whole structure again to find inline objects
-      /* what was this good for again ?
-      list($new_parts, $new_attachments) =
-        rcmail_parse_message($MESSAGE['structure'],
-                             array('safe' => intval($_GET['_safe']),
-                                   'prefer_html' => TRUE,
-                                   'get_url' => $GET_URL.'&_part=%s'));
-
-      $all_parts = array_merge($new_parts, $new_attachments);
-      for ($partix = 0; $partix < sizeof($all_parts); $partix++)
-        if ($all_parts[$partix]->mime_id == $pid)
-          $part = &$all_parts[$partix];
-      */
-
       // get part body if not available
       if (!$part->body)
         $part->body = $MESSAGE->get_part_content($part->mime_id);
@@ -100,10 +89,17 @@ else if ($pid = get_input_value('_part', RCUBE_INPUT_GET)) {
       $OUTPUT->write(rcmail_print_body($part, array('safe' => $MESSAGE->is_safe, 'inline_html' => false)));
     }
     else {
-      header(sprintf('Content-Length: %d', $part->size));
-      header(sprintf('Content-Disposition: %s; filename="%s";',
-                     $_GET['_download'] ? 'attachment' : 'inline',
-                     $part->filename ? abbreviate_string($part->filename, 55) : "roundcube.$ctype_secondary"));
+      // don't kill the connection if download takes more than 30 sec.
+      if (!ini_get('safe_mode')) {
+          set_time_limit(0);
+      }
+      
+      $filename = $part->filename ? $part->filename : ($MESSAGE->subject ? $MESSAGE->subject : 'roundcube') . '.'.$ctype_secondary;
+      $filename = abbreviate_string($part->filename, 55);
+      $filename = $browser->ie ? rawurlencode($filename) : addslashes($filename);
+      $disposition = !empty($_GET['_download']) ? 'attachment' : 'inline';
+      
+      header("Content-Disposition: $disposition; filename=\"$filename\"");
 
       // turn off output buffering and print part content
       $IMAP->get_message_part($MESSAGE->uid, $part->mime_id, $part, true);