public async Task SendFileAsync(LinkProfile profile, string filePath, FileSenderHandler handler)
{
if (profile == null || handler == null)
{
throw new ArgumentNullException();
}
var fileInfo = new FileInfo(filePath);
if (!fileInfo.Exists)
{
throw new FileNotFoundException("File not found!", filePath);
}
var length = fileInfo.Length;
var packet = new { name = fileInfo.Name, length };
using (var tcp = await Network.ConnectAsync("link.share.file", packet, profile.GetTcpEndPoint(), CancellationToken))
{
var stream = tcp.GetStream();
var result = await stream.ReadBlockWithHeaderAsync(Environment.TcpBufferLimits, CancellationToken);
var data = Generator.AsToken(result);
if (data["status"].As <string>() != "wait")
{
throw new LinkException(LinkError.InvalidData);
}
using (var sender = new FileSender(this, profile, stream, fileInfo.FullName, length))
{
await UpdateUIAsync(() => handler.Invoke(sender));
await sender.LoopAsync();
}
}
}
private async Task UpdateImageAsync(LinkProfile profile)
{
var cache = client.Cache;
var imageHash = profile.RemoteImageHash;
try
{
if (cache.Exists(imageHash, out var fullpath) == false)
{
fullpath = await cache.RequestAsync(imageHash, profile.GetTcpEndPoint(), client.CancellationToken);
}
profile.ImageHash = imageHash;
await client.UpdateUIAsync(() => profile.ImagePath = fullpath);
}
finally
{
Op.Lock(locker, () => pending.Remove(profile.Id));
}
}
internal async Task SendAsync(LinkProfile profile, Message message, string path, object packetData)
{
message.Status = MessageStatus.Pending;
profile.MessageCollection.Add(message);
bool handled(Token token)
{
var status = token["status"].As <string>();
var flag = status == "ok"
? MessageStatus.Success
: status == "refused" ? MessageStatus.Refused : default;
if (flag == default)
{
return(false);
}
message.Status = flag;
return(true);
}
for (var i = 0; i < 2; i++)
{
try
{
var result = await RequestAsync(path, packetData, profile.GetUdpEndPoint(), environment.UdpTimeout);
if (handled(result.Data))
{
return;
}
}
catch (LinkException ex) when(ex.ErrorCode == LinkError.UdpPacketTooLarge)
{
break;
}
catch (TimeoutException)
{
continue;
}
}
var tcp = default(TcpClient);
var stream = default(NetworkStream);
var cancel = new CancellationTokenSource();
try
{
tcp = await ConnectAsync(path, packetData, profile.GetTcpEndPoint(), cancel.Token);
stream = tcp.GetStream();
var buffer = await stream.ReadBlockWithHeaderAsync(environment.TcpBufferLimits, cancel.Token).TimeoutAfter(environment.TcpTimeout);
var token = generator.AsToken(buffer);
if (handled(token))
{
return;
}
}
catch (Exception)
{
// ignore
}
finally
{
cancel.Cancel();
cancel.Dispose();
stream?.Dispose();
tcp?.Dispose();
}
message.Status = MessageStatus.Aborted;
}
