I was trying, for the first time, to create a (fairly simple) SOAP
extension for some of my web services. They were to be called from the
WindowsForms host application.
Following error message occured:
Client found response content type of '', but expected 'text/xml'.
Calling this web service from the browser (as recommended) produced
little more explanation:
Exception Details: System.InvalidO perationExcepti on: Request format is
unrecognized.
Stack Trace:
[InvalidOperatio nException: Request format is unrecognized.]
System.Web.Serv ices.Protocols. WebServiceHandl erFactory.CoreG etHandler(Type
type, HttpContext context, HttpRequest request, HttpResponse response)
+388
System.Web.Serv ices.Protocols. WebServiceHandl erFactory.GetHa ndler(HttpConte xt
context, String verb, String url, String filePath) +94
System.Web.Http Application.Map HttpHandler(Htt pContext context,
String requestType, String path, String pathTranslated, Boolean
useAppConfig) +699
System.Web.MapH andlerExecution Step.System.Web .HttpApplicatio n+IExecutionSte p.Execute()
+95
System.Web.Http Application.Exe cuteStep(IExecu tionStep step, Boolean&
completedSynchr onously) +173
This explanation left me unclear if this was the case of malformed XML
or (somehow) missing content type?
Initial implementation was connected to the service by using
(SoapExtensionA ttribute inherited) attribute. I tried with the
<soapExtensionT ypes> entry in the web.config, with no result at all.
Next step for me was to go back and try an official MS example (from
the Developer Studio help files) - simple request/response service
log. It resulted with exactly the same set of error messages.
Following that I commented out all the code in the overriden
ProcessMessage - voiding all extension functionality - same thing
again. It seems that this problem has nothing to do with the web
service code itself or with the SoapExtension inherited class code. Am
I missing some additional configuration parameters?
This kind (and very similar kind) of problems were raised several
times on this forum by now, but nobody gave any reasonable answer yet
to it.
Everything works under Windows XP (tested on two different machines),
IIS 5.1.
At this stage, I am starting to run out of ideas. Any comment is
appreciated.
Regards,
Dejan Petrovic
3  7377 
I have seen this a couple of times and never fully got to the bottom of it.
When using config settings are you sure you set them correctly? If nothing
is return from your service then the config settings are most likely not set
correctly.
"Dejan" <pe*******@roym organ.com> wrote in message
news:7e******** *************** ***@posting.goo gle.com... I was trying, for the first time, to create a (fairly simple) SOAP
extension for some of my web services. They were to be called from the
WindowsForms host application.
Following error message occured:
Client found response content type of '', but expected 'text/xml'.
Calling this web service from the browser (as recommended) produced
little more explanation:
Exception Details: System.InvalidO perationExcepti on: Request format is
unrecognized.
Stack Trace:
[InvalidOperatio nException: Request format is unrecognized.]
System.Web.Serv ices.Protocols. WebServiceHandl erFactory.CoreG etHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response)
+388
System.Web.Serv ices.Protocols. WebServiceHandl erFactory.GetHa ndler(HttpConte x
t context, String verb, String url, String filePath) +94
System.Web.Http Application.Map HttpHandler(Htt pContext context,
String requestType, String path, String pathTranslated, Boolean
useAppConfig) +699
System.Web.MapH andlerExecution Step.System.Web .HttpApplicatio n+IExecutionSte p
..Execute() +95
System.Web.Http Application.Exe cuteStep(IExecu tionStep step, Boolean&
completedSynchr onously) +173
This explanation left me unclear if this was the case of malformed XML
or (somehow) missing content type?
Initial implementation was connected to the service by using
(SoapExtensionA ttribute inherited) attribute. I tried with the
<soapExtensionT ypes> entry in the web.config, with no result at all.
Next step for me was to go back and try an official MS example (from
the Developer Studio help files) - simple request/response service
log. It resulted with exactly the same set of error messages.
Following that I commented out all the code in the overriden
ProcessMessage - voiding all extension functionality - same thing
again. It seems that this problem has nothing to do with the web
service code itself or with the SoapExtension inherited class code. Am
I missing some additional configuration parameters?
This kind (and very similar kind) of problems were raised several
times on this forum by now, but nobody gave any reasonable answer yet
to it.
Everything works under Windows XP (tested on two different machines),
IIS 5.1.
At this stage, I am starting to run out of ideas. Any comment is
appreciated.
Regards,
Dejan Petrovic
Web Services Framework requires valid ContentType to be able to process a
SOAP message. In your case the ContentType is empty.
This could happens if
1. the SoapExtension explicitly sets the SoapMessage.Con tentType to null
(or empty string)
2. the SoapExtension modifies the message stream in a way that it looks
empty, the most common case is that after the stream manipulation its
position is not re-set to the beginning of the stream:
case SoapMessageStag e.AfterSerializ e:
// need to set the position at the begginning of the stream
to be able to process the stream data
newStream.Posit ion = 0;
GenerateNewStre amData(newStrea m, oldStream);
break;
case SoapMessageStag e.BeforeDeseria lize:
GenerateNewStre amData(oldStrea m, newStream);
// have to reset the position to 0, so the stream could be
processed by other extensions or the WS Framework
newStream.Posit ion = 0;
break;
You were right, problem was in the stream re-wind. This was a simple
case of doing it in the wrong place, in the AfterSerialize stage.
Thank you very much for your help. el****@online.m icrosoft.com (Elena Kharitidi) wrote in message news:<C#******* *******@cpmsftn gxa10.phx.gbl>. .. Web Services Framework requires valid ContentType to be able to process a
SOAP message. In your case the ContentType is empty.
This could happens if
1. the SoapExtension explicitly sets the SoapMessage.Con tentType to null
(or empty string)
2. the SoapExtension modifies the message stream in a way that it looks
empty, the most common case is that after the stream manipulation its
position is not re-set to the beginning of the stream:
case SoapMessageStag e.AfterSerializ e:
// need to set the position at the begginning of the stream
to be able to process the stream data
newStream.Posit ion = 0;
GenerateNewStre amData(newStrea m, oldStream);
break;
case SoapMessageStag e.BeforeDeseria lize:
GenerateNewStre amData(oldStrea m, newStream);
// have to reset the position to 0, so the stream could be
processed by other extensions or the WS Framework
newStream.Posit ion = 0;
break;
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