Windows Authenticated WCF JsonP Sample ? Work?

Question

Is it possible to have a wcf service c# .net 4 expose jsonp on IIS and Windows Authentication?  I have tried numerous ways but I am unable to achieve this.

Is this possible? 
Do you have sample code?

 

thx 

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dave

Answer 1

JSONP cannot be used together with windows authentication, or any other authentication type. If you try to do that your service will throw the following error:

Cross domain javascript callback is not supported in authenticated services

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Answer 2

Yes that appears to the be the problem.

How can Javascript access data from another server if I cannot use jsonp?  In our environment we have mutliple servers/domains and I would like to host a service (protected by windows authentication) from one domain and serve it up to other sites which are in other domains and access via javascript?

 

I would like to access from javascript and I would like to utilize wcf.  Is this even possible?

thx

 

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dave

Answer 3

JSONP with authentication can make your service vulnerable to XSS attacks. So it's not allowed. The WC3 has a draft on cross original JavaScript access: http://www.w3.org/TR/access-control/. Most modern browsers already support it, but still be careful as this is not a standard, just a draft. But note IE is different from other browsers. IE requires you to use XDomainRequest, while other browsers allows you to use normal XMLHttpRequest.

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Answer 4

Hi Dave - Did you figure out a workaround for this?

I also have the same requirement.

Answer 5

I have a workaround for this -

http://jeremybranham.wordpress.com/2011/11/11/authenticated-wcf-service-that-returns-jsonp/

 

Answer 6

Have you tried this solution?

Can you share code if you have it working? (windows authentication?)

Right now, I am not using wcf (as a work around) and simply outputting jsonp formatted output to the browser.  My client javascript/jquery is able to read this fine.  I would very much rather use wcf however.

Please let me know if you have it working?

 

thx -dave

 

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dave

Answer 7

yes. I wrote that blog up today. i will update it with some examples soon.