HTTPS response issues

Fixes bug 1179392

glanceclient.common.http.HTTPClient.get_connection_kwargs method
explicitly sets the timeout to be a float, while struc.pack is
still using LL as the format string which means 2 Long Integers.
Setting format string to fL which mean a float followed by Long
Integer.

Also, Bad file descriptor error is caused by socket being closed
to soon. Added a close() implementation to VerifiedHTTPSConnection
which will remove reference to socket before returning call to
base HTTPConnection.close(). This will avoid socket to be closed
before response body is read. Socket will close when response
close is called.

Change-Id: I3a973da3b962c7572ae0f61f6996bdd1f0048339

glanceclient/common/http.py

@@ -288,6 +288,11 @@ class OpenSSLConnectionDelegator(object):
         return getattr(self.connection, name)
 
     def makefile(self, *args, **kwargs):
+        # Making sure socket is closed when this file is closed
+        # since we now avoid closing socket on connection close
+        # see new close method under VerifiedHTTPSConnection
+        kwargs['close'] = True
+
         return socket._fileobject(self.connection, *args, **kwargs)
 
 
@@ -411,10 +416,21 @@ class VerifiedHTTPSConnection(HTTPSConnection):
         if self.timeout is not None:
             # '0' microseconds
             sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVTIMEO,
-                            struct.pack('LL', self.timeout, 0))
+                            struct.pack('fL', self.timeout, 0))
         self.sock = OpenSSLConnectionDelegator(self.context, sock)
         self.sock.connect((self.host, self.port))
 
+    def close(self):
+        if self.sock:
+            # Removing reference to socket but don't close it yet.
+            # Response close will close both socket and associated
+            # file. Closing socket too soon will cause response
+            # reads to fail with socket IO error 'Bad file descriptor'.
+            self.sock = None
+
+        # Calling close on HTTPConnection to continue doing that cleanup.
+        HTTPSConnection.close(self)
+
 
 class ResponseBodyIterator(object):
     """A class that acts as an iterator over an HTTP response."""