Merge pull request #671 from alateas/master

Make error output more clear for too big uploads.

telegram/utils/request.py

@@ -186,7 +186,7 @@ class Request(object):
         try:
             message = self._parse(resp.data)
         except ValueError:
-            raise NetworkError('Unknown HTTPError {0}'.format(resp.status))
+            message = 'Unknown HTTPError'
 
         if resp.status in (401, 403):
             raise Unauthorized(message)
@@ -194,6 +194,10 @@ class Request(object):
             raise BadRequest(message)
         elif resp.status == 404:
             raise InvalidToken()
+        elif resp.status == 413:
+            raise NetworkError('File too large. Check telegram api limits '
+                               'https://core.telegram.org/bots/api#senddocument')
+
         elif resp.status == 502:
             raise NetworkError('Bad Gateway')
         else: