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I started with the SimpleDemo and am now running into issues, because I require outside dependencies while handling an grpc request. For example a logger or file writer, which I cannot create during the class function call.

Is there any way to solve this problem?

I ran across a phenomenon, where my delphi client application runs out of memory, after a certain amount of requests done by the gRPC client (in my case after around 2000 requests). You can reproduce the error by simply running a lot of requests in your DEMOs, after a few requests you can already see, that the memory usage is going up in Taskmanager.

eurekaLogs says the error is produced at "TThreadSafeBuffer"-"Create" when it sets the length of the buffer, SetLength(...), in Grijjy.HTTP (not http2)

I found two bugs in the TThreadSaveBuf class and the write and read method. The Write method write(const ABytes: TBytes) fails when ABytes = nil. I solved the problem by the following code change: if ABytes<>nil then
Write(@abytes[0], Length(ABytes))
else
FSize := 0;
The second bug is in the overloaded Read(const ABuffer: Pointer; var ALength: NativeInt) function. Error clearing read data in buffer.
I solved the problem by replacing line Move(FBuffer[Size], FBuffer[0], FSize - ALength);
with line Move(FBuffer[ALength], FBuffer[0], FSize - ALength);.

The available ProtoBufGenerator executable does not produce the correct code for the latest version of the library (and not the same code as the one included in the examples). Could you make an updated version of the ProtoBufGenerator executeable available? Or the source code for it?