[#17] Client: Add extra parameter

API methods' parameters types with optional session, polling settings, xHeaders etc. and corresponding handlers have been added

Signed-off-by: Pavel Gross <p.gross@yadro.com>

src/FrostFS.SDK.ClientV2/Tools/ObjectReader.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Threading.Tasks;
+
+using Grpc.Core;
+
+using FrostFS.Object;
+using FrostFS.SDK.ModelsV2;
+using System.Threading;
+
+namespace FrostFS.SDK.ClientV2;
+
+public class ObjectReader(AsyncServerStreamingCall<GetResponse> call) : IObjectReader
+{
+    private bool disposed = false;
+
+    public AsyncServerStreamingCall<GetResponse> Call { get; private set; } = call;
+
+    internal async Task<Object.Object> ReadHeader()
+    {
+        if (!await Call.ResponseStream.MoveNext())
+            throw new InvalidOperationException("unexpected end of stream");
+        
+        var response = Call.ResponseStream.Current;
+        Verifier.CheckResponse(response);
+        
+        if (response.Body.ObjectPartCase != GetResponse.Types.Body.ObjectPartOneofCase.Init)
+            throw new InvalidOperationException("unexpected message type");
+        
+        return new Object.Object
+        {
+            ObjectId = response.Body.Init.ObjectId,
+            Header = response.Body.Init.Header,
+        };
+    }
+
+    public async Task<byte[]?> ReadChunk(CancellationToken cancellationToken = default)
+    {
+        if (!await Call.ResponseStream.MoveNext(cancellationToken))
+            return null;
+        
+        var response = Call.ResponseStream.Current;
+        Verifier.CheckResponse(response);
+        
+        if (response.Body.ObjectPartCase != GetResponse.Types.Body.ObjectPartOneofCase.Chunk)
+            throw new InvalidOperationException("unexpected message type");
+
+        return response.Body.Chunk.ToByteArray();
+    }
+
+    public void Dispose()
+    {
+        if (!disposed)
+        {
+            Call.Dispose();
+            GC.SuppressFinalize(this);
+
+            disposed = true;
+        }
+    }
+}