From 361e86c6ff04cf0d6a3cb07226309e99df373128 Mon Sep 17 00:00:00 2001
From: Lee <ldolse@yahoo.com>
Date: Thu, 7 Apr 2011 23:04:32 +0800
Subject: [PATCH] ...

---
 src/calibre/customize/builtins.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/calibre/customize/builtins.py b/src/calibre/customize/builtins.py
index 475cb36687..5e50f81173 100644
--- a/src/calibre/customize/builtins.py
+++ b/src/calibre/customize/builtins.py
@@ -10,6 +10,7 @@ from calibre.constants import numeric_version
 from calibre.ebooks.metadata.archive import ArchiveExtract, get_cbz_metadata
 from calibre.ebooks.metadata.opf2 import metadata_to_opf
 from calibre.ebooks.oeb.base import OEB_IMAGES
+from calibre.utils.config import test_eight_code
 
 # To archive plugins {{{
 class HTML2ZIP(FileTypePlugin):
@@ -166,6 +167,14 @@ class ComicMetadataReader(MetadataReaderPlugin):
     description = _('Extract cover from comic files')
 
     def get_metadata(self, stream, ftype):
+        if hasattr(stream, 'seek') and hasattr(stream, 'tell'):
+            pos = stream.tell()
+            id_ = stream.read(3)
+            stream.seek(pos)
+            if id_ == b'Rar':
+                ftype = 'cbr'
+            elif id.startswith(b'PK'):
+                ftype = 'cbz'
         if ftype == 'cbr':
             from calibre.libunrar import extract_first_alphabetically as extract_first
             extract_first