Andrew Spencer

AFAIK: Your URL should specify "https:/xxxxxxx", if so required. Or a forwarder on the server side will route to https Parameters and values are input as part of the TRESTRequest.Resource parameter. These are added to the Base URL, which is in TRESTCleint.BaseURL

It seems to me, after some sniffing with WireShark, that TLS1.2 is not available following the KB5018410 roll-out. TLS1.3 protocols are being used by Insomnia, Firefox etc requests. The Delphi TRESTClient/TRESTRequest/TRESTResponse suite, however, seems to be stuck on TLS1.2. I have tried setting SecureProtocols parameters in TRESTClient (which are unchecked by default), but this has made no difference. I made a quick change of my simple application to use the ICS TSslHttpRest component. Not having used it before and hardly knowing how to use it, I could quickly see that it is reaching our server and polling the above URL correctly. However, it is definitely not going to be viable/quick to change our application's usage of the TRESTxxxxxx components to the ICS component. It seems to me that the TRESTClient (?) component is not performing correctly. I've attached my test project SimpleREST.zip