diff --git a/seafileapi/client.py b/seafileapi/client.py
index c77743b..9c245fd 100644
--- a/seafileapi/client.py
+++ b/seafileapi/client.py
@@ -84,7 +84,7 @@ def delete(self, *args, **kwargs):
         return self._send_request('DELETE', *args, **kwargs)
 
     def _send_request(self, method, url, *args, **kwargs):
-        if not url.startswith('http') or url.startswith('https'):
+        if not (url.startswith('http') or url.startswith('https')):
             url = urljoin(self.server, url)
 
         headers = kwargs.get('headers', {})
diff --git a/seafileapi/files.py b/seafileapi/files.py
index 3348342..bcfba74 100644
--- a/seafileapi/files.py
+++ b/seafileapi/files.py
@@ -53,11 +53,19 @@ def delete(self):
         resp = self.client.delete(url)
         return resp
 
-    def rename(self):
+    def rename(self, newname):
         """
 
+        :param newname:
         """
-        pass
+        url = '/api2/repos/{}/file/{}'.format(self.repo.id, querystr(p=self.path))
+        postdata = {
+                'operation': 'rename',
+                'newname': newname
+                }
+        resp = self.client.post(url, data=postdata)
+        return resp
+
 
     def copyTo(self, dst_dir, dst_repo=None):
         """
diff --git a/seafileapi/repo.py b/seafileapi/repo.py
index a1e0d16..3b3f6d2 100644
--- a/seafileapi/repo.py
+++ b/seafileapi/repo.py
@@ -35,7 +35,7 @@ def from_json(cls, client, repo_json):
         """
         repo_id = repo_json['id']
         repo_name = repo_json['name']
-        repo_desc = repo_json['desc']
+        repo_desc = repo_json.get('desc', '')
         encrypted = repo_json['encrypted']
         perm = repo_json['permission']
         owner = repo_json['owner']