Set unkown file type

templates/repo_file_get.html

@@ -150,6 +150,6 @@
       });
       });
 {% endif %}
-{% if filetype != 'Text' and filetype != 'Image' and filetype != 'SVG' and filetype != 'Document' and filetype != 'PDF' %}
+{% if filetype == 'Unkown' %}
         $('#file-view').html('<p>该类型文件无法在线查看。<a href="{{ SITE_ROOT }}repo/{{ repo.id }}/{{ obj_id }}/?file_name={{ file_name }}&op=download">下载</a></p>');
 {% endif %}

templates/view_shared_file.html

@@ -20,7 +20,6 @@
 {% block extra_script %}
 <script type="text/javascript">
     var url = '{{ SITE_ROOT }}repo/{{ repo.id }}/file/get/?t={{ access_token }}&p={{ path|urlencode }}&u={{ username }}',
-        filetype = '{{ filetype }}';
     
     {% include "repo_file_get.html" %}
 </script>

utils.py

@@ -240,7 +240,7 @@ def valid_previewed_file(filename):
     
     """
     fileExt = os.path.splitext(filename)[1][1:]
-    return FILEEXT_TYPE_MAP.get(fileExt)
+    return FILEEXT_TYPE_MAP.get(fileExt) or 'Unkown'
 
 def get_file_revision_id_size (commit_id, path):
     """Given a commit and a file path in that commit, return the seafile id