Fix download bandwidth for swift command.

We noticed a difference in download bandwidth while using
authentication details and pre-auth information for download.
Download using authentication details included authentication
time into the download bandwidth at each call of the function.
This time should have been excluded from download bandwidth.

This patch set is adding a timer variable to the client library.
That allows to accurately measure and store the time of each action.
Then while printing the download bandwith in the swift command
authentication time is excluded from bandwidth.

Change-Id: I63df9023e169f637f120ae9e25dac9c90a4e75a0
Fixes: bug #1197443

bin/swift

@@ -331,7 +331,7 @@ def st_download(parser, args, thread_manager):
             headers, body = \
                 conn.get_object(container, obj, resp_chunk_size=65536,
                                 headers=req_headers)
-            header_receipt = time()
+            headers_receipt = time()
             content_type = headers.get('content-type')
             if 'content-length' in headers:
                 content_length = int(headers.get('content-length'))
@@ -391,9 +391,14 @@ def st_download(parser, args, thread_manager):
                 utime(path, (mtime, mtime))
             if options.verbose:
                 finish_time = time()
-                time_str = 'headers %.3fs, total %.3fs, %.3f MB/s' % (
-                    header_receipt - start_time, finish_time - start_time,
-                    float(read_length) / (finish_time - start_time) / 1000000)
+                auth_time = conn.auth_end_time - start_time
+                headers_receipt = headers_receipt - start_time
+                total_time = finish_time - start_time
+                download_time = total_time - auth_time
+                time_str = ('auth %.3fs, headers %.3fs, total %.3fs, '
+                            '%.3f MB/s' % (
+                                auth_time, headers_receipt, total_time,
+                                float(read_length) / download_time / 1000000))
                 if conn.attempts > 1:
                     thread_manager.print_msg('%s [%s after %d attempts]', path,
                                              time_str, conn.attempts)
@@ -460,9 +465,10 @@ def st_download(parser, args, thread_manager):
                     thread_manager.error('Account not found')
             elif len(args) == 1:
                 if '/' in args[0]:
-                    print >> stderr, ('WARNING: / in container name; you '
-                                      'might have meant %r instead of %r.' % (
-                                      args[0].replace('/', ' ', 1), args[0]))
+                    print >> stderr, (
+                        'WARNING: / in container name; you might have meant '
+                        '%r instead of %r.' % (
+                            args[0].replace('/', ' ', 1), args[0]))
                 container_queue.put((args[0], object_queue, options.prefix))
             else:
                 if len(args) == 2:

swiftclient/client.py

@@ -26,7 +26,7 @@ from functools import wraps
 from urllib import quote as _quote
 from urlparse import urlparse, urlunparse
 from httplib import HTTPException, HTTPConnection, HTTPSConnection
-from time import sleep
+from time import sleep, time
 
 from swiftclient.exceptions import ClientException, InvalidHeadersException
 
@@ -1071,6 +1071,7 @@ class Connection(object):
         self.cacert = cacert
         self.insecure = insecure
         self.ssl_compression = ssl_compression
+        self.auth_end_time = 0
 
     def get_auth(self):
         return get_auth(self.authurl, self.user, self.key,
@@ -1104,6 +1105,7 @@ class Connection(object):
                 if not self.url or not self.token:
                     self.url, self.token = self.get_auth()
                     self.http_conn = None
+                self.auth_end_time = time()
                 if not self.http_conn:
                     self.http_conn = self.http_connection()
                 kwargs['http_conn'] = self.http_conn