WebAPI not returning HTTP 406 and giving unacceptable content

Question

I'm writing a WebAPI application and trying to remove XML. I have removed the XmlFormatter but if I make a request with Accept: application/xml I still get a 200 response with an application/json body. Why is this? How do I ensure that I get back a 406 error instead?

CodeCaster · Accepted Answer · 2015-12-17 19:03:10Z

1

WebAPI desperately want to return a response, so the default content negotiator falls back to the one available when no match was found.

You'll have to provide excludeMatchOnTypeOnly:

var negotiator = new DefaultContentNegotiator(excludeMatchOnTypeOnly: true);
config.Services.Replace(typeof(IContentNegotiator), negotiator);

At least, according to this 2012 blog post.

answered Dec 17, 2015 at 19:03

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1 Comment

coppro Over a year ago

I guess that this should work? But it isn't, and I can't figure out why.

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