StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POWCF service access from client application when user is behind proxy
text
Body
copied!<p>I have a WCF service hosted on a server. A client application is accessing the service on a windows 7 machine. There are two users on Windows 7 machine. Windows application is a installed through Clickonce so separate instance will be there for two users. </p> <p>When userA accessing the service through Winforms application it works fine, but when userB on the same machine trying to access it throws following exception: Communication Exception: The remote server returned an unexpected response: (417) Expectation failed.</p> <pre><code>Server stack trace: at System.ServiceModel.Channels.HttpChannelUtilities.ValidateRequestReplyResponse(HttpWebRequest request, HttpWebResponse response, HttpChannelFactory factory, WebException responseException, ChannelBinding channelBinding) at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout) at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout) at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs) at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at Myapp.ServiceProxy.IMyAPIService.GetData(String userName, String passWord) </code></pre> <p><strong>What could be the reason behind working for one user and not for other? Am I missing anything?</strong></p> <p><strong>UPDATE</strong>: Though I found a solution (Please see my answer below) to this issue but still wanted to know what should be done in this scenario. As MSDN <a href="http://msdn.microsoft.com/en-us/library/system.net.servicepointmanager.expect100continue.aspx" rel="noreferrer">article</a> says it blocks user to send large amount of data to server, but it didn't mention about any limit in that?</p> <p>What is the limit of data client can send to server? Is there any better approach for connecting a WCF service from a client who is behind proxy? </p>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload