Easy Troubleshooting WCF Bad Request Protocol Errors

October 17, 2021 By Brock Radcliffe-Brown Off

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You may see an error message that says wcf is an invalid request protocol error. Well, there are several steps you can take to fix this problem. We will discuss this shortly.

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g.If you implement a WCF service with defaults and additionally expect to be able to send me a large XML file to the server, sometimes an invalid request error from the Internet can occur. This error basically tells you that the server is refusing to process all of your requests because it thinks that this particular request is incompatible with someone else’s HTTP protocol.

If the web page has a service in WcfSvcHost.Process, startwhere i go to url:

http: // localhost / myservice / contract

  System.ServiceModel.ProtocolException, System.ServiceModel, Version = 3.0.0.0, Culture = neutral, PublicKeyToken = b77a5c561934e089 Problem with XML received from do-Networking. See Inner Exception for details. at System.ServiceModel.Channels.HttpRequestContext.CreateMessage ()at System.ServiceModel.Channels.HttpChannelListener.HttpContextReceived (HttpRequestContext context, ItemDequeuedCallback callback)at System.ServiceModel.Channels.SharedHttpTransportManager.OnGetContextCore (result of IAsyncResult)at System.ServiceModel.Channels.SharedHttpTransportManager.OnGetContext (result of IAsyncResult)at System.ServiceModel.Diagnostics.Utility.AsyncThunk.UnhandledExceptionFrame (IAsyncResult result)at System.Net.LazyAsyncResult.Complete (IntPtr userToken)at System.Net.LazyAsyncResult.ProtectedInvokeCallback (object result, IntPtr userToken)at System.Net.ListenerAsyncResult.WaitCallback (UInt32 error code, UInt32 numBytes, NativeOverlapped)With nativeoverlapped * System.Threading._IOCompletionCallback.PerformIOCompletionCallback (UInt32 UInt32 errorCode, numBytes, NativeOverlapped * pOVERLAP) System.Xml.XmlException, System.Xml, Version = 2.0.0.0, Culture = neutral, PublicKeyToken = b77a5c561934e089  The text of one of our messages could not be read because it is empty. at System.ServiceModel.Channels.HttpRequestContext.CreateMessage ()at System.ServiceModel.Channels.HttpChannelListener.HttpContextReceived (HttpRequestContext context, ItemDequeuedCallback callback)at System.ServiceModel.Channels.SharedHttpTransportManager.OnGetContextCore (result of IAsyncResult)at System.ServiceModel.Channels.SharedHttpTransportManager.OnGetContext (result of IAsyncResult)at System.ServiceModel.Diagnostics.Utility.AsyncThunk.UnhandledExceptionFrame (IAsyncResult result)at System.Net.LazyAsyncResult.Complete (IntPtr userToken)at System.Net.LazyAsyncResult.ProtectedInvokeCallback (object result, IntPtr userToken)at System.Net.ListenerAsyncResult.WaitCallback (UInt32 error code, UInt32 numBytes, NativeOverlapped)With nativeoverlapped * System.Threading._IOCompletionCallback.PerformIOCompletionCallback (UInt32 errorCode, UInt32 NativeOverlapped * numBytes, pOVERLAP)

http: // localhost / myservice? wsdl

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Everything is working fine and I am getting the WSDL package. At this point, I can also completely remove the MetadataHttp metadata endpoint and it won’t make any difference.

I am using .NET 3.5 SP1. Does anyone know what is likely to be here?

Wrong

If the service metadata is available to you, I receive an invalid HTTP 400 request. Validation failed

From WCF activity records, I found that System.Xml.XmlException is an exception thrown with a message from the user: “The body of the implication could not be read;Oh that it is considered empty. ”
Here is an excerpt and one of the log file I would say: