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Added AutoTransport which is will pick the best transport supported b…
…y the client and server. - Added ConnectTimeout to ServerSentEventsTransport. - Handle stopping the SSE transport better. - Added Wp7 sample. - Added Delay event based on threading timers to the TaskAsyncHelper.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| using System.Threading.Tasks; | ||
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| namespace SignalR.Client.Transports | ||
| { | ||
| public class AutoTransport : IClientTransport | ||
| { | ||
| // Transport that's in use | ||
| private IClientTransport _transport; | ||
|
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| // List of transports in fallback order | ||
| private static readonly IClientTransport[] _transports = new[] { Transport.ServerSentEvents, Transport.LongPolling }; | ||
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| public Task Start(Connection connection, string data) | ||
| { | ||
| var tcs = new TaskCompletionSource<object>(); | ||
|
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| // Resolve the transport | ||
| ResolveTransport(connection, data, tcs, 0); | ||
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| return tcs.Task; | ||
| } | ||
|
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| private void ResolveTransport(Connection connection, string data, TaskCompletionSource<object> tcs, int index) | ||
| { | ||
| // Pick the current transport | ||
| IClientTransport transport = _transports[index]; | ||
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| transport.Start(connection, data).ContinueWith(task => | ||
| { | ||
| if (task.IsFaulted) | ||
| { | ||
| // If that transport fails to initialize then fallback | ||
| var next = index + 1; | ||
| if (next < _transports.Length) | ||
| { | ||
| // Try the next transport | ||
| ResolveTransport(connection, data, tcs, next); | ||
| } | ||
| else | ||
| { | ||
| // If there's nothing else to try then just fail | ||
| tcs.SetException(task.Exception); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| // Set the active transport | ||
| _transport = transport; | ||
| // Complete the process | ||
| tcs.SetResult(null); | ||
| } | ||
| }); | ||
| } | ||
|
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||
| public Task<T> Send<T>(Connection connection, string data) | ||
| { | ||
| return _transport.Send<T>(connection, data); | ||
| } | ||
|
|
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| public void Stop(Connection connection) | ||
| { | ||
| _transport.Stop(connection); | ||
| } | ||
| } | ||
| } |
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