minor readbility refactoring and not requiring file modification time to be...

minor readbility refactoring and not requiring file modification time to be send (for backward compatibility)

LaunchScript/VirtualAcousticsStarterServer.py

@@ -408,24 +408,31 @@ class VirtualAcousticsLauncher:
 
   # Receives a file from a client, copies it to a tmp folder and returns the respective fullpath
   #   Input is a string message starting with "file:"
-  #   it has the content file:[RelativePathToFile]:[FileLengthInBytes]:[ModificationTimeInSecondsSinceEPOCH]
+  #   it has the content file:[RelativePathToFile]:[FileLengthInBytes]:[ProjectName]:[ModificationTimeInSecondsSinceEPOCH]
   def receive_file(self, sMessage):
     aMessageParts = sMessage.split(":")
     Path, Filename = os.path.split(aMessageParts[1])
     iBytesToReceive = int(aMessageParts[2])
     ProjectName = aMessageParts[3]
-    iLastModificationTime = int(aMessageParts[4])
+    
     Fullpath = os.path.join(self.sCurrentScriptsDirectory, "..", "tmp", ProjectName, Path, "")
     print("Should receive file: "+Filename+" in path "+Fullpath+ " with "+str(iBytesToReceive)+" bytes")
 
-    iLocalFileLastModification = iLastModificationTime # default set it to the remote file time (in case it does not exist yet)
-    if os.path.isfile(Fullpath+Filename):
-      iLocalFileLastModification = os.path.getmtime(Fullpath+Filename)
+    bNewerFileExists = False
+    #only do this check if the modification time was transmitted (for backward compatibility)
+    if len(aMessageParts)>=5:
+      iLastModificationTime = int(aMessageParts[4])
+      iLocalFileLastModification = iLastModificationTime # default set it to the remote file time (in case it does not exist yet)
+      if os.path.isfile(Fullpath+Filename):
+        iLocalFileLastModification = os.path.getmtime(Fullpath+Filename)
+      if iLocalFileLastModification<iLastModificationTime:
+        bNewerFileExists = True
 
     #check whether the file with this exact size (which is not older than the file to send) already exists
-    if os.path.isfile(Fullpath+Filename) and os.stat(Fullpath+Filename).st_size==iBytesToReceive and iLocalFileLastModification>iLastModificationTime:
+    iLocalFileSize = os.stat(Fullpath+Filename).st_size
+    if os.path.isfile(Fullpath+Filename) and iLocalFileSize == iBytesToReceive and not bNewerFileExists :
       self.oLauncherConnection.send( b'exists' )
-      print("File already exists with this size, so no need for resending")
+      print("File already exists (same size, and more recent modification time), so no need for resending")
 
     else: #file needs to be received
       #create dir if it does not exist