Manual bond serialization

- Removes multiple useless copies of payload

Directory.Build.targets

@@ -1,6 +1,6 @@
 <Project>
 	<ItemGroup Label="Global Dependencies">
-		<PackageReference Include="ShortDev.IO" Version="0.1.3" />
+		<PackageReference Include="ShortDev.IO" Version="0.1.4" />
 	</ItemGroup>
 
 	<ItemGroup Label="Global Usings">

lib/ShortDev.Microsoft.ConnectedDevices.NearShare/CdpFileProvider.cs

@@ -1,5 +1,4 @@
-using System.IO;
-using System.Text;
+using System.Text;
 
 namespace ShortDev.Microsoft.ConnectedDevices.NearShare;
 
@@ -43,9 +42,9 @@ public static CdpFileProvider FromStream(string fileName, Stream stream)
     public ulong FileSize
         => (ulong)_buffer.Length;
 
-    public ReadOnlySpan<byte> ReadBlob(ulong start, uint length)
+    public ReadOnlyMemory<byte> ReadBlob(ulong start, uint length)
     {
-        Span<byte> buffer = new byte[length];
+        var buffer = new byte[length];
         _buffer.Position = (long)start;
         _buffer.Read(buffer);
         return buffer;

lib/ShortDev.Microsoft.ConnectedDevices.NearShare/Messages/FetchDataResponse.cs

@@ -0,0 +1,44 @@
+using ShortDev.Microsoft.ConnectedDevices.Serialization;
+
+namespace ShortDev.Microsoft.ConnectedDevices.NearShare.Messages;
+internal static class FetchDataResponse
+{
+    public static void Write(EndianWriter writer, uint contentId, ulong start, ReadOnlySpan<byte> blob)
+    {
+        CompactBinaryBondWriter bondWriter = new(writer.Buffer);
+
+        bondWriter.WriteFieldBegin(Bond.BondDataType.BT_MAP, 1);
+        bondWriter.WriteContainerBegin(count: 4, Bond.BondDataType.BT_WSTRING, Bond.BondDataType.BT_STRUCT);
+
+        WritePropertyBegin(ref bondWriter, "ControlMessage", PropertyType.PropertyType_UInt32);
+        bondWriter.WriteFieldBegin(Bond.BondDataType.BT_UINT32, 104);
+        bondWriter.WriteUInt32((uint)NearShareControlMsgType.FetchDataResponse);
+        bondWriter.WriteStructEnd();
+
+        WritePropertyBegin(ref bondWriter, "ContentId", PropertyType.PropertyType_UInt32);
+        bondWriter.WriteFieldBegin(Bond.BondDataType.BT_UINT32, 104);
+        bondWriter.WriteUInt32(contentId);
+        bondWriter.WriteStructEnd();
+
+        WritePropertyBegin(ref bondWriter, "BlobPosition", PropertyType.PropertyType_UInt64);
+        bondWriter.WriteFieldBegin(Bond.BondDataType.BT_UINT64, 106);
+        bondWriter.WriteUInt64(start);
+        bondWriter.WriteStructEnd();
+
+        WritePropertyBegin(ref bondWriter, "DataBlob", PropertyType.PropertyType_UInt8Array);
+        bondWriter.WriteFieldBegin(Bond.BondDataType.BT_LIST, 200);
+        bondWriter.WriteContainerBegin(blob.Length, Bond.BondDataType.BT_UINT8);
+        bondWriter.WriteBytes(blob);
+        bondWriter.WriteStructEnd();
+
+        bondWriter.WriteStructEnd();
+    }
+
+    static void WritePropertyBegin(ref CompactBinaryBondWriter writer, string name, PropertyType type)
+    {
+        writer.WriteWString(name);
+
+        writer.WriteFieldBegin(Bond.BondDataType.BT_INT32, 0);
+        writer.WriteInt32((int)type);
+    }
+}

lib/ShortDev.Microsoft.ConnectedDevices.NearShare/NearShareSender.cs

@@ -185,12 +185,10 @@ void HandleDataRequest(BinaryMsgHeader header, ValueSet payload)
                 TotalFiles = (uint)_files.Count
             });
 
-            ValueSet response = new();
-            response.Add("ControlMessage", (uint)NearShareControlMsgType.FetchDataResponse);
-            response.Add("ContentId", contentId);
-            response.Add("BlobPosition", start);
-            response.Add("DataBlob", blob.ToArray().ToList()); // ToDo: Remove allocation
-            SendValueSet(response, header.MessageId);
+            Channel.SendBinaryMessage(writer =>
+            {
+                FetchDataResponse.Write(writer, contentId, start, blob.Span);
+            }, header.MessageId);
         }
     }
 }