Changeset 66617 in vbox for trunk/src/VBox/Main/glue

Timestamp:

Apr 20, 2017 1:00:29 AM (8 years ago)

Author:

vboxsync

Message:

VBox/Main: bugref:3300: VBoxSVC from terminal server session is not 'visible' - fixed issues in Python VirtualBox API

File:

• trunk/src/VBox/Main/glue/vboxapi.py (modified) (3 diffs)

trunk/src/VBox/Main/glue/vboxapi.py

@@ -439 +439 @@
         self.winerror = winerror
 
+        # Setup client impersonation in COM calls
+        try:
+            pythoncom.CoInitializeSecurity(None, 
+                                       None, 
+                                       None, 
+                                       pythoncom.RPC_C_AUTHN_LEVEL_DEFAULT, 
+                                       pythoncom.RPC_C_IMP_LEVEL_IMPERSONATE, 
+                                       None, 
+                                       pythoncom.EOAC_NONE,
+                                       None)
+        except:
+            # handle RPC_E_TOO_LATE (repeat call of CoInitializeSecurity)
+            print("Warning: CoInitializeSecurity was already called")
+            pass
+        
+
         pid = GetCurrentProcess()
         self.tid = GetCurrentThreadId()
@@ -465 +481 @@
         win32com.client.gencache.EnsureDispatch('VirtualBox.VirtualBox')
         win32com.client.gencache.EnsureDispatch('VirtualBox.VirtualBoxClient')
+
+        # instance of client used to support lifetime of VBoxSDS
+        self.client = None
 
         self.oIntCv = threading.Condition()
@@ -508 +527 @@
         import win32com
         from win32com.client import Dispatch
-        client = win32com.client.Dispatch("VirtualBox.VirtualBoxClient")
-        return client.virtualBox
+        # Caching self.client is the trick for SDS
+        # It's allows to keep the VBoxSDS in the memory 
+        # until the end of PlatformMSCOM lifetme
+        if self.client is None:
+            self.client = win32com.client.Dispatch("VirtualBox.VirtualBoxClient")
+        return self.client.virtualBox
 
     def getType(self):