void ReadFileAsync()
{
_fs.BeginRead(_buffer, 0, _buffer.Length, _ =>
{
try
{
var count = _fs.EndRead(_);
var ee = new DataProgressEventArgs(_fs.Length, _fs.Position);
var op = Context.Operation;
if (op == null)
{
OnProgressChanged(ee);
}
else
{
op.Post(__ => OnProgressChanged(ee), null);
}
if (count == 0)
{
_fs.Close();
WriteFooterAsync();
}
else
{
AsyncData.AsyncStreamWrite(_buffer, 0, count, true, __ => ReadFileAsync());
}
}
catch (Exception ex)
{
AsyncData.Exception = ex;
AsyncData.NotifyAsyncComplete();
}
}, null);
}
/// <summary>
/// 写入头信息
/// </summary>
protected virtual void WriteFooterAsync()
{
AsyncData.AsyncStreamWrite(System.Text.Encoding.ASCII.GetBytes("\r\n"), true, _ =>
{
if (AsyncData.Exception == null)
{
_callback();
}
});
}
protected override void WriteBodyAsync()
{
if (Data != null)
{
AsyncData.AsyncStreamWrite(Data, true, _ => WriteFooterAsync());
}
else
{
WriteFooterAsync();
}
}
void BeginReadSourceStream()
{
Stream.BeginRead(_buffer, 0, _buffer.Length, _ =>
{
try
{
var count = Stream.EndRead(_);
if (count > 0)
{
AsyncData.AsyncStreamWrite(_buffer, 0, count, true, __ => BeginReadSourceStream());
}
else
{
AsyncData.NotifyAsyncComplete();
}
}
catch (Exception ex)
{
AsyncData.Exception = ex;
AsyncData.NotifyAsyncComplete();
}
}, this);
}
/// <summary>
/// 写入头信息
/// </summary>
protected virtual void WriteHeaderAsync()
{
AsyncData.AsyncStreamWrite(GetFieldHeaderBuffer(), true, _ => WriteBodyAsync());
}
void FlushWriteFileAsync()
{
var endingstr = "--" + RequestBoundary + "--";
AsyncData.AsyncStreamWrite(Message.Encoding.GetBytes(endingstr), false, null);
}