connect.py 文件源码

def __GetElementTree(protocol, server, port, path, sslContext):
   """
   Private method that returns a root from ElementTree for a remote XML document.

   @param protocol: What protocol to use for the connection (e.g. https or http).
   @type  protocol: string
   @param server: Which server to connect to.
   @type  server: string
   @param port: Port
   @type  port: int
   @param path: Path
   @type  path: string
   @param sslContext: SSL Context describing the various SSL options. It is only
                      supported in Python 2.7.9 or higher.
   @type  sslContext: SSL.Context
   """

   if protocol == "https":
      kwargs = {"context": sslContext} if sslContext else {}
      conn = http_client.HTTPSConnection(server, port=port, **kwargs)
   elif protocol == "http":
      conn = http_client.HTTPConnection(server, port=port)
   else:
      raise Exception("Protocol " + protocol + " not supported.")
   conn.request("GET", path)
   response = conn.getresponse()
   if response.status == 200:
      try:
         tree = ElementTree.fromstring(response.read())
         return tree
      except ExpatError:
         pass
   return None

## Private method that returns an ElementTree describing the API versions
## supported by the specified server.  The result will be vimServiceVersions.xml
## if it exists, otherwise vimService.wsdl if it exists, otherwise None.