a little more robust against odd conditions

[sfa.git] / sfa / trust / credential.py

diff --git a/sfa/trust/credential.py b/sfa/trust/credential.py
index 775cde9..c1e55ee 100644 (file)
--- a/sfa/trust/credential.py
+++ b/sfa/trust/credential.py
@@ -268,7 +268,7 @@ class Credential(object):
                 str = file(filename).read()
                 
             # if this is a legacy credential, write error and bail out
-            if str.strip().startswith("-----"):
+            if isinstance (str, StringTypes) and str.strip().startswith("-----"):
                 logger.error("Legacy credentials not supported any more - giving up with %s..."%str[:10])
                 return
             else: