X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/f69e114cf6dbe51525e98ca30a52ef3dd4341167..0eb72b526bf8bbb011551ecf019f604e17a534f1:/sdk/python/arvados/cache.py

diff --git a/sdk/python/arvados/cache.py b/sdk/python/arvados/cache.py
index ac6d18463c..85f2b89ea2 100644
--- a/sdk/python/arvados/cache.py
+++ b/sdk/python/arvados/cache.py
@@ -1,5 +1,10 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+from builtins import object
 import errno
-import md5
+import hashlib
 import os
 import tempfile
 import time
@@ -32,14 +37,14 @@ class SafeHTTPCache(object):
         return self._dir
 
     def _filename(self, url):
-        return os.path.join(self._dir, md5.new(url).hexdigest()+'.tmp')
+        return os.path.join(self._dir, hashlib.md5(url.encode('utf-8')).hexdigest()+'.tmp')
 
     def get(self, url):
         filename = self._filename(url)
         try:
             with open(filename, 'rb') as f:
                 return f.read()
-        except IOError as OSError:
+        except (IOError, OSError):
             return None
 
     def set(self, url, content):
@@ -49,7 +54,7 @@ class SafeHTTPCache(object):
             return None
         try:
             try:
-                f = os.fdopen(fd, 'w')
+                f = os.fdopen(fd, 'wb')
             except:
                 os.close(fd)
                 raise