X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/b77893f2a8ae755f22615054f2c267d990995e1c..0e0c1400b57d5de8aa8c18dd4897527f905a4b42:/sdk/python/arvados/api.py

diff --git a/sdk/python/arvados/api.py b/sdk/python/arvados/api.py
index ccf16a5fce..59a73b45e5 100644
--- a/sdk/python/arvados/api.py
+++ b/sdk/python/arvados/api.py
@@ -1,5 +1,9 @@
+from __future__ import absolute_import
+from future import standard_library
+standard_library.install_aliases()
+from builtins import range
 import collections
-import httplib
+import http.client
 import httplib2
 import json
 import logging
@@ -12,9 +16,10 @@ import types
 import apiclient
 from apiclient import discovery as apiclient_discovery
 from apiclient import errors as apiclient_errors
-import config
-import errors
-import util
+from . import config
+from . import errors
+from . import util
+from . import cache
 
 _logger = logging.getLogger('arvados.api')
 
@@ -66,7 +71,7 @@ def _intercept_http_request(self, uri, **kwargs):
         # High probability of failure due to connection atrophy. Make
         # sure this request [re]opens a new connection by closing and
         # forgetting all cached connections first.
-        for conn in self.connections.itervalues():
+        for conn in self.connections.values():
             conn.close()
         self.connections.clear()
 
@@ -75,7 +80,7 @@ def _intercept_http_request(self, uri, **kwargs):
         self._last_request_time = time.time()
         try:
             return self.orig_http_request(uri, **kwargs)
-        except httplib.HTTPException:
+        except http.client.HTTPException:
             _logger.debug("Retrying API request in %d s after HTTP error",
                           delay, exc_info=True)
         except socket.error:
@@ -86,7 +91,7 @@ def _intercept_http_request(self, uri, **kwargs):
             # httplib2 reopens connections when needed.
             _logger.debug("Retrying API request in %d s after socket error",
                           delay, exc_info=True)
-            for conn in self.connections.itervalues():
+            for conn in self.connections.values():
                 conn.close()
         time.sleep(delay)
         delay = delay * self._retry_delay_backoff
@@ -135,8 +140,8 @@ def http_cache(data_type):
     try:
         util.mkdir_dash_p(path)
     except OSError:
-        path = None
-    return path
+        return None
+    return cache.SafeHTTPCache(path, max_age=60*60*24*2)
 
 def api(version=None, cache=True, host=None, token=None, insecure=False, **kwargs):
     """Return an apiclient Resources object for an Arvados instance.