duplex

问题 I'm trying to build a SOA where clients can perform long running queries on the server and the server responds using a callback. I'd like to be able to detect if the client disconnects (through user initiated shutdown, unhandled exception or loss of network connectivity) so that the server can choose to cancel the expensive request. I'm testing a variety of failure cases but I can't seem to get certain event handlers to fire. Tested Failure Cases: Killing the Client Process After the request.

问题 Hi have quite a problem with an Service running WCF in duplex-mode. It leaks memory (not much but it's about 80MB a day) and after having a memory-profiler running alongside the service for 24 hours I found most of the memory sitting in byte[] referenced by quite a mess but I most references end in something like this: and the "root" looks like this: I too see lots of ServiceChannel (around 200) comming (I think) from the callback-channels. I'm rather sure that I only hold 1 of those for each

问题 My app is supposed to take Web Audio streamed from the client, encode it as MP3, before sending it back out to clients via WebSocket. I can currently encode and pipe to a file like this: inbound_stream.pipe(encoder).pipe(fs.createWriteStream('audio.mp3')); And if I already have a file on the server I can do this: var mp3File = fs.createReadStream('audio.mp3'); mp3File.on('data', function(buffer){ io.sockets.emit('audio', { buffer: buffer }); }); However, I want to access the encoded chunks in

问题 I have a desktop app with a duplex WCF service, but I have some troubles using the callback. The service is started as following in main of program.cs: ServiceHost svcHost = new ServiceHost(typeof(PeriodicService)); svcHost.Open(); Console.WriteLine("Available Endpoints :\n"); svcHost.Description.Endpoints.ToList().ForEach(endpoint => Console.WriteLine(endpoint.Address.ToString() + " -- " + endpoint.Name)); For the service I created a subscribe function where the callbackchannel is saved in a

问题 I want to use WCF to enable two way communication without opening a port on the client. I'm developing something like a P2P application (similar to teamviewer/logmein) where you don't need to open ports to communicate. How do I accomplish two way communication through HTTP/HTTPS without the need to open a port in the client? Note : Port 80 can be opened in the server...no issues on that. Thanks 回答1: Well those systems you mention work as follows. They first try to make client A and client B

问题 I am trying to build a server/web service which provides APIs to Android/iOS client. I am using WCF service and clients can send request to server successfully. Now, I am going to make server enable to ping client to notify that there some changes in server and client need to synchronize data. The question is: Is it possible to enable my server to ping client (Android/iOS), I knew that it is possible for Windows client by using wsDualHttpBinding but I am not sure about iOS and Android client.

问题 I have created a WCF duplex service and client in .NET and its working fine and its pretty good also. Now I wish to make an Android client. I have used kSoap previously for webservices and those are good for client to service connections. But in the case of duplex communication in which I need the service to sent message to client , I dont know how to implement. 回答1: Unfortunately none of the duplex bindings are interoperable At this point polling might be your simplest option. Further down

问题 I have a web site that needs data to be pushed to it. Unfortunately, I'm not aware of any other methods besides using HTML 5 WebSockets (I can't garauntee my clients will have HTML5 browers) and Comet (I'm not using java/tomcat). I am not a big fan of using server-side ASP.NET for this particular project, and would prefer to use ASP.NET MVC or something like it. Is it possible to tie JavaScript in with a duplex service? 回答1: Well actually you can leverage the pollingduplex binding used for

问题 I have a Duplex service (Singleton), which used to work with WSDualHttpBinding, and after changing it to duplex CustomBinding to support BinaryEncoding for performance reasons, it stopped working. The problem traces to GetCallBackChannel always returns with same HashCode (within that service instance) for all the client requests and the List thinks it already exists in the subscribed channels and wont add to the Subscribers list. I am using C# 3.5 Please suggest a solution.. Thanks in Advance