我尝试将流作为参数传递,但不确定哪种方式是“最佳”的,因此希望听取您对我的代码示例的意见/建议。
个人而言,我更喜欢选项3,但我从未在任何其他地方看到过这样做。
选项1适用于小型流(和已知大小的流)。
选项2_1和2_2总是让“处理程序”怀疑谁有负责释放/关闭的责任。
public interface ISomeStreamHandler
{
// Option 1
void HandleStream(byte[] streamBytes);
// Option 2
void HandleStream(Stream stream);
// Option 3
void HandleStream(Func<Stream> openStream);
}
public interface IStreamProducer
{
Stream GetStream();
}
public class SomeTestClass
{
private readonly ISomeStreamHandler _streamHandler;
private readonly IStreamProducer _streamProducer;
public SomeTestClass(ISomeStreamHandler streamHandler, IStreamProducer streamProducer)
{
_streamHandler = streamHandler;
_streamProducer = streamProducer;
}
public void DoOption1()
{
var buffer = new byte[16 * 1024];
using (var input = _streamProducer.GetStream())
{
using (var ms = new MemoryStream())
{
int read;
while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, read);
}
_streamHandler.HandleStream(ms.ToArray());
}
}
}
public void DoOption2_1()
{
_streamHandler.HandleStream(_streamProducer.GetStream());
}
public void DoOption2_2()
{
using (var stream = _streamProducer.GetStream())
{
_streamHandler.HandleStream(stream);
}
}
public void DoOption3()
{
_streamHandler.HandleStream(_streamProducer.GetStream);
}
}
Stream
读取,写入MemoryStream
,并转换为byte[]
。为什么不直接从Stream
中读取并使用缓冲区呢? - dcastro