Eradicate eventlet and fix bug lp:959221

The bug is simple: whenever swift uploads to a Swift with SSL,
it uses 100% CPU. It happens because we use HTTPSConnection from
eventlet that loops like that, while holding the interpreter lock.

Now, it could be fixed in eventlet, but let's try something more
natural: drop the eventlet's HTTP client. We do not use green
threads in the client anymore, so it's not like we need it for that.

Note that in most cases clients do not use the BufferedHTTPConnection
either, because it's only installed on Swift server nodes, not on
workstations. Get rid of that too.

bug: 959221
Change-Id: I1eb932779d4171598b3efaa043f817b9c6c995c4

swiftclient/client.py

@@ -25,25 +25,9 @@ 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
 
-try:
-    from eventlet.green.httplib import HTTPException, HTTPSConnection
-except ImportError:
-    from httplib import HTTPException, HTTPSConnection
-
-try:
-    from eventlet import sleep
-except ImportError:
-    from time import sleep
-
-try:
-    from swift.common.bufferedhttp \
-        import BufferedHTTPConnection as HTTPConnection
-except ImportError:
-    try:
-        from eventlet.green.httplib import HTTPConnection
-    except ImportError:
-        from httplib import HTTPConnection
 
 logger = logging.getLogger("swiftclient")
 

tests/utils.py

@@ -13,8 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 from httplib import HTTPException
-
-from eventlet import Timeout, sleep
+from time import sleep
 
 
 def fake_get_keystoneclient_2_0(os_options, exc=None, **kwargs):
@@ -61,8 +60,6 @@ def fake_http_connect(*code_iter, **kwargs):
         def getresponse(self):
             if kwargs.get('raise_exc'):
                 raise Exception('test')
-            if kwargs.get('raise_timeout_exc'):
-                raise Timeout()
             return self
 
         def getexpect(self):

tools/test-requires

@@ -7,7 +7,6 @@ flake8==2.0
 
 coverage
 discover
-eventlet
 python-keystoneclient
 sphinx>=1.1.2
 testrepository>=0.0.13