SignalR: no messaging until file uploaded/downloaded at the same web site

Question

I have some problem when proceed downloading or uploading file (WebClient.DownloadFileAsync|UploadFileAsync or by HttpWebRequest) and simultaneously calling SignalR-hub methods:

SignalR calls were stopped until file loading finished. It seems like that: all signalr calls enqueuing. All enqueued calls are performed further (after file loading).

My code fragment:

hubProxy.Invoke("TraceDocumentUploadingRequest", callerId, fileName, "File loading started ", 0);

DownloadFileByKey(fileKey, (progressPercentage, bytesSent) => { hubProxy.Invoke("TraceDocumentUploadingRequest", callerId, fileName, "File loading in progress", progressPercentage); });

hubProxy.Invoke("TraceDocumentUploadingRequest", callerId, fileName, "File loading finished", 100);

Second "TraceDocumentUploadingRequest" hub method call (in file load handler) will be executed on the hub after file downloading completion.

File load handler executes both in current thread or in another (related on DownloadFileByKey method realization) - result is the same.

How I can avoid this behavior and force hub-method calls at the right time?

This is something we've fixed in later versions of SignalR. As a workaround, you can try upping the number of concurrent connections in service point manager to something like 100: ServicePointManager.DefaultConnectionLimit = 100; http://msdn.microsoft.com/en-us/library/system.net.servicepointmanager.defaultconnectionlimit.aspx — davidfowl, Oct 03 '13 at 15:43

score 0 · Answer 1 · answered Jul 24 '15 at 13:36

0

To summarize David Fowl's comments, the issue was a bug in SignalR version 1.1.3 but fixed in later version. Specifically version 2.0.0

answered Jul 24 '15 at 13:36

Stephen

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SignalR: no messaging until file uploaded/downloaded at the same web site

1 Answers1