private static async Task ProvideItem(HttpListenerRequest request, HttpListenerResponse response)
{
var param = request.RequestUri.ParseQueryParameters();
var sessionId = param.GetByKey(Consts.SessionId);
var itemId = param.GetByKey(Consts.ItemId);
bool provided = false;
//能够提供文件的会话，可能是SendItemsRequester,或者是BrowseResponder,或者是GetItemsResponder(不再需要这个了？)
IItemProviderConversation br = SuperDriveCore.Conversations.GetByKey(sessionId) as IItemProviderConversation;
FileItem fi = br?.FindItem(itemId) as FileItem;
if (fi != null)
{
try
{
response.Headers.ContentLength = fi.Length;
response.UseMemoryStream = false;
await response.WriteHeaders();
var buffer = new byte[1024 * 1024];
using (var stream = fi.Open(FileMode.Open, FileAccess.Read))
{
int count;
while (!fi.IsTransferEnd() && (count = await fi.ReadAsync(buffer)) != 0)
{
await response.GetSocketStream().WriteAsync(buffer, 0, count);
provided = true;
Env.Logger.Log("Get Item End " + itemId, "Http");
}
}
response.Dispose();
}
catch (Exception e)
{
Env.Logger.Log($"Provide item[{fi}] exception", stackTrace: e.StackTrace);
//TODO 这里没机会改Stats code了。只能强制关闭socket。
response.CloseSocket();
}
}
if (!provided)
{
response.Forbidden();
response.Dispose();
}
}
#pragma warning disable 1998
internal static async Task <BrowseResponseMessage> Response(IItemProviderConversation conv, BrowseRequestMessage browseRequestMessage)
#pragma warning restore 1998
{
var pathId = browseRequestMessage.DirItemId;
var dir = conv.FindItem(pathId) as DirItem;
var brpm = new BrowseResponseMessage {
Id = conv.Id
};
if (dir == null)
{
brpm.CurrentDir = null;
}
else
{
brpm.CurrentDir = dir;
brpm.Items = dir.Children;
}
return(brpm);
}