[Ctk-developers] Ctk-developers Digest, Vol 26, Issue 6

Fri Sep 9 08:31:18 UTC 2011

We indeed completely depend on QtSoap for creating the Soap messages. If the soap message looks like this before any parsong, there is definitely something wrong in QtSoap. However it was tha case, I would understand that our implementation works only on our host, but it also works with XIP, which is not based on QtSoap. So either this attribute is simply ignored by the java implementation, or there is some preprocessing that strips part of the message? Definitely worth investigating... ----- Original Message -----
> Hello Sascha and Ben,
> Thank you very much for the quick and detailed answers.
> In addition, when we tried to validate the message using the online
> validations - http://www.xmlvalidation.com we also see the type
> attribute :type="xsd:string" is not a valid XML attribute string and
> also it looks that the namespace name is missing here. The string
> should be either type="xsd:string" if no namespace is used(without
> leading colon), or this xmlns:type="xsd:string" if xmlns is a
> namespace name.
> Since the method addMethodAttribute of QtSoapmessage is setting this,
> is that we need to change in the QtSoap module? or any other options?
> please advice.
> thank you very much!
> /Anthony
> On Thu, Sep 8, 2011 at 6:47 AM, < ctk-developers-request at commontk.org
> > wrote:
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> > Today's Topics:
> > 1. Re: CTK based Hosted App fails when launched from Non-CTK
> > Host (Benoit Bleuze)
> > ----------------------------------------------------------------------
> > Message: 1
> > Date: Thu, 8 Sep 2011 12:46:30 +0200 (CEST)
> > From: Benoit Bleuze < benoit.bleuze at inria.fr >
> > Subject: Re: [Ctk-developers] CTK based Hosted App fails when
> > launched
> > from Non-CTK Host
> > To: Sascha Zelzer < s.zelzer at dkfz-heidelberg.de >
> > Cc: Anthony Dass < antdass at gmail.com >, ctk-developers at commontk.org
> > Message-ID:
> > < 610925954.61455.1315478790178.JavaMail.root at zmbs4.inria.fr >
> > Content-Type: text/plain; charset="utf-8"
> > Hi Anthony, Sascha gave you all the technical answers we had in
> > stock
> > so far, but I can add a bit of context here, it may help. As Sascha
> > said, the state/newState switch is due to XIP not following the
> > specifications. And your change is valid. We started with "state",
> > but
> > the only other host we could use being XIP, we changed it. You are
> > welcome to revert it. I think we notified Larry (Lawrence Tarbox) of
> > that problem during the last hackfest in Chapel Hill. Eventually XIP
> > will change its API there (or so I hope). Replacing the WSDL files
> > doesn't change anything since we don't use them to generate the
> > interface, all the messages are hard coded soap messages constructed
> > from C++. Now I know nothing of the WCF unfortunately, so I can't
> > tell
> > you whether the "type:" keyword is misinterpreted or whatever.
> > Sascha's suggestion of changing the casing sounds promising to me. I
> > remember we used capitals in some actions , following the WSDL
> > actually, and had to change it afterwards for
> > specifications and XIP compatibility. I remember Larry telling us
> > the
> > WSDL provided in the specs was not up to date, and thus we provide
> > an
> > updated (or at least it was valid last february) set of WSDL (and
> > siblings) files there:
> > http://www.commontk.org/index.php/File:Wsdl_ft.zip Note that they
> > also
> > have actions starting with capitals. I have a faint memory of Larry
> > giving us an explanation as to why they were upper cased, but I
> > can't
> > remember the reason, my guess is that the .Net implementation forced
> > them to do so. And it is very well possible that the XIP java
> > implementation accepts both casing and the .NET or WCF are stricter,
> > so I guess you'll have to choose between the proposed WSDL and the
> > specifications... Keep us posted of your progress. Ben -----
> > Original
> > Message -----
> > > Hi Anthony,
> > > Welcome to the ctk-developers list.
> > > > We've tried adapting one of our DICOM application into a CTK
> > > > Based
> > > > Hosted App. It works well when tried with the ctkhost - we could
> > > > launch the app, load the DICOM data and get through different
> > > > states
> > > > as well.
> > > So far, good news.
> > > > However when tried launching the same app with different non-ctk
> > > > based
> > > > host, it launches our app but fails to load any data. This
> > > > non-ctk
> > > > based host seems to be written using the WCF as per
> > > > specification
> > > > in
> > > > DICOM 118.
> > > Please note that we could only test our implementation against the
> > > XIP
> > > host (written in Java) so far. So the problems you are
> > > experiencing
> > > might very well relate to our implementation.
> > > > On investigating, we noticed that the initial ?IDLE? message
> > > > sent
> > > > by
> > > > the App upon launch is not getting processed by the Non-CTK
> > > > based
> > > > host.
> > > > When traced the SOAP communication, we found out that the
> > > > messages
> > > > from the plug-in are getting to the host, but then they are not
> > > > processed by WCF because of some WSDL contacts mismatch. Thus
> > > > the
> > > > host
> > > > does not receive any messages. Here?s the log message:
> > > > < Message > The message with Action '' cannot be processed at
> > > > the
> > > > receiver, due to a ContractFilter mismatch at the
> > > > EndpointDispatcher.
> > > > This may be because of either a contract mismatch (mismatched
> > > > Actions
> > > > between sender and receiver) or a binding/security mismatch
> > > > between
> > > > the sender and the receiver. Check that sender and receiver have
> > > > the
> > > > same contract and the same binding (including security
> > > > requirements,
> > > > e.g. Message, Transport, None). </ Message >
> > > > When debugging the WCF processing of the message we get the
> > > > deserialization error:
> > > > "The ':' character, hexadecimal value 0x3A, cannot be included
> > > > in
> > > > a
> > > > name. Line 4, position 11."
> > > > Here?s the SOAP message braced between the CTK-plugin and
> > > > Non-CTK
> > > > based Host:
> > > > < SOAP-ENV:Envelope xmlns:SOAP-ENV = "
> > > > http://schemas.xmlsoap.org/soap/envelope/ "
> > > > SOAP-ENV:encodingStyle
> > > > =
> > > > "
> > > > http://schemas.xmlsoap.org/soap/encoding/ " xmlns:xsd = "
> > > > http://www.w3.org/1999/XMLSchema " >
> > > > < SOAP-ENV:Body xmlns:SOAP-ENV = "
> > > > http://schemas.xmlsoap.org/soap/envelope/ " >
> > > > < notifyStateChanged xmlns = " http://wg23.dicom.nema.org/ " >
> > > > < newState :type = " xsd:string " > IDLE </ newState >
> > > > </ notifyStateChanged >
> > > > </ SOAP-ENV:Body >
> > > > </ SOAP-ENV:Envelope >
> > > > We can see the ?:type? item in the newState element that?s
> > > > causing
> > > > the
> > > > error in WCF. Also, per DICOM supplement 118 it should be called
> > > > ?state?, not ?newState?.
> > > Looking at the debug output from the CTK hosted app, the xml
> > > namespace
> > > for the "type" attribute in the "newState" tag is intact. So I am
> > > wondering it the output above has already been modified somehow by
> > > the
> > > WCF host or if it is the original message from the CTK hosted app.
> > > > Here?s the example of the SOAP message generated by Non-CTK
> > > > based
> > > > HostedApp: < s:Envelope xmlns:s = "
> > > > http://schemas.xmlsoap.org/soap/envelope/ " > < s:Body > <
> > > > NotifyStateChanged xmlns = "
> > > > http://dicom.nema.org/PS3.19/HostService-20100825 " > < state >
> > > > IDLE
> > > > </ state > </ NotifyStateChanged > </ s:Body > </ s:Envelope >
> > > > Next, we tried changing ?newState? to ?state? but again it fails
> > > > when
> > > > tried with the non-ctk based host and producing the same error.
> > > I think it is still either related to the ":type" attribute or the
> > > error described below. Concerning state/newState, please also see
> > > my
> > > comments below.
> > > > ...
> > > > 2011-09-06 17:17:59,609 <faultstring xsi:type="xsd:string"
> > > > xmlns:xsi="
> > > > http://www.w3.org/1999/XMLSchema-instance ">The message with
> > > > Action
> > > > ''
> > > > cannot be processed at the receiver, due to a ContractFilter
> > > > mismatch
> > > > at the EndpointDispatcher. This may be because of either a
> > > > contract
> > > > mismatch (mismatched Actions between sender and receiver) or a
> > > > binding/security mismatch between the sender and the receiver.
> > > > Check
> > > > that sender and receiver have the same contract and the same
> > > > binding
> > > > (including security requirements, e.g. Message, Transport,
> > > > None).</faultstring> ...
> > > This actually hints at a problem concerning the action names.
> > > Looking
> > > at the WSDL, the operation names start with upper case latters,
> > > where
> > > we are using lower case (unfortunately, the text in the DICOM Part
> > > 19
> > > specs refer to the method names with starting lower case letters).
> > > > I even tried replacing the WSDL files with the one provided by
> > > > Non-CTK
> > > > based host, but still it doesn?t seem to work.
> > > Yes, that does not change the actual behavior.
> > > > When looked at the code, I noticed a comment in the CTK code
> > > > (below
> > > > methods) ?spec would be "state", java has "newState" FIX
> > > > JAVA/STANDARD?. Could this be something we need to look for? If
> > > > so
> > > > may
> > > > I know what would be the change in Java side.
> > > Unfortunately, again, the text in the specs refer to "newState"
> > > for
> > > the argument name and this is what the XIP host is using. So we
> > > used
> > > it too for testing with XIP. But I agree that the WSDL should be
> > > the
> > > definite guide and we should use "state" when not testing with
> > > XIP.
> > > My advice would be to keep your modification ("newState" ->
> > > "state")
> > > and also try to modify the action (method) names in
> > > ctkDicomAppService.cpp (lines 40 - 60) to use upper case for the
> > > first
> > > letter.
> > > I would be happy if you could keep us posted about your progress.
> > > Thanks,
> > > Sascha
> > > _______________________________________________
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