Using header to pass additional information about feign HOT 7 CLOSED

Hmm... nothing that I'm aware of for dynamic header values based on method arguments.

A request interceptor can have dynamic behavior, including adding request headers, based on anything else in the request template. Probably the closest to what you're looking for in the existing functionality would be adding query parameters based on method arguments, and a request interceptor to move the values from query parameters to headers. It's a rather indirect approach, however. Instead, I think it would make sense to enhance Feign by adding support for tokenization of header annotations.

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I think headers already supports token replacement via Named parameters, right?

https://github.com/Netflix/feign/blob/master/core/src/main/java/feign/Headers.java

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Don't know how I missed that. Ignore what I said earlier. Using token replacement in declared header annotations is the right approach, and should already be supported.

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I am creating a Feign client with Ribbon Module, how do I attach a interceptor in the Feign.create function?

Or how do I attach the RibbonModule with the builder method?

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The readme covers how to use the RibbonModule with Feign.create.

https://github.com/Netflix/feign#ribbon

To attach an interceptor when using Feign.create, you will need to create a custom Dagger module.

https://github.com/Netflix/feign#dagger
http://square.github.io/dagger/

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here's an example of a header param in use.

https://github.com/Netflix/denominator/blob/master/dynect/src/main/java/denominator/dynect/InvalidatableTokenProvider.java

wrt ribbon, it could be refactored to expose RibbonClient, which could be passed as a builder arg. for now, what @davidmc24 says is correct.

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ping if this didn't help!

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