Fix type header null exception

src/DotNetCore.CAP/Internal/ICapPublisher.Default.cs

@@ -71,7 +71,7 @@ namespace DotNetCore.CAP.Internal
             var messageId = SnowflakeId.Default().NextId().ToString();
             headers.Add(Headers.MessageId, messageId);
             headers.Add(Headers.MessageName, name);
-            headers.Add(Headers.Type, typeof(T).FullName);
+            headers.Add(Headers.Type, typeof(T).Name);
             headers.Add(Headers.SentTime, DateTimeOffset.Now.ToString());
             if (!headers.ContainsKey(Headers.CorrelationId))
             {

src/DotNetCore.CAP/Internal/IConsumerRegister.Default.cs

@@ -152,7 +152,7 @@ namespace DotNetCore.CAP.Internal
             client.OnMessageReceived += async (sender, transportMessage) =>
             {
                 _logger.MessageReceived(transportMessage.GetId(), transportMessage.GetName());
-               
+
                 long? tracingTimestamp = null;
                 try
                 {
@@ -182,8 +182,16 @@ namespace DotNetCore.CAP.Internal
                     catch (Exception e)
                     {
                         transportMessage.Headers.Add(Headers.Exception, nameof(SerializationException) + "-->" + e.Message);
-                        var dataUri = $"data:{transportMessage.Headers[Headers.Type]};base64," + Convert.ToBase64String(transportMessage.Body);
-                        message = new Message(transportMessage.Headers, dataUri);
+                        if (transportMessage.Headers.TryGetValue(Headers.Type, out var val))
+                        {
+                            var dataUri = $"data:{val};base64," + Convert.ToBase64String(transportMessage.Body);
+                            message = new Message(transportMessage.Headers, dataUri);
+                        }
+                        else
+                        {
+                            var dataUri = "data:UnknownType;base64," + Convert.ToBase64String(transportMessage.Body);
+                            message = new Message(transportMessage.Headers, dataUri);
+                        }
                     }
 
                     if (message.HasException())