Different version on Client and Server

BIZ TMS RemoteDB
1

Hello,
I have a problem with the new version of RemoteDB 2.18.0.1 or 2.0.18.2
I just replaced the server and then when I access it I get the error "Could not perform WinHttp operation. Error: (-2147467260)".
If I also compile the client side with the new version, access works.
Can't I use a newer version of RemoteDB with the previous one (2.17.3.4)?
Thank you for your feedback

2

It's recommended to update the client to the newer version too.

3

Hello Wagner,

that's a big problem:

The clients are installed at the customer's site and therefore cannot simply be updated.

The problem has become particularly serious for us when we updated the server (hundreds of clients).

Now we have the problem that we first have to install the "old" RemoteDB version in order to provide new functions, then the new one for the clients, which then have to be distributed. Unfortunately, that's very cumbersome. It would be nice if there was backwards compatibility!

Best regards
Karl-Heinz Otter

4

Can you please do a small test. Here in unit RemoteDB.Server.Module, around line 517, you have this code:

procedure TCustomRemoteDBModule.ProvideResponse(Context: THttpServerContext; Proc: TProc<TStream>);
var
  Compress: boolean;
  DoChunked: boolean;
  DestStream: TStream;
  CompressStream: TStream;
begin
  // REPLACE WITH THIS LINE
  Compress := SameText(Context.Request.Headers.Get('accept-encoding'), 'deflate'); 
  DoChunked := SameText(Context.Request.Headers.Get('te'), 'chunked');
  Context.Response.Chunked := DoChunked;
  if not DoChunked then
    DestStream := TMemoryStream.Create
  else

Modify the code to replace the first line with the one indicated above, which is:

Compress := SameText(Context.Request.Headers.Get('accept-encoding'), 'deflate');

And please let me know if this makes your server backward compatible with the existing clients.