Allow multipart/form-data requests on token endpoints

[lvandyk]

We updating to the latest version of IdentityServer4 but we have one breaking change that removes the ability to use multipart-form-data on the token endpoint: https://github.com/IdentityServer/IdentityServer4/issues/4340

We currently have clients and apps configured to use multipart-form-data. We are making the fix to use form-url-encoded but what about the existing installations?

Is there a way to disable this check or to somehow create a middleware that will convert the request to form-url-encoded just before hitting the token endpoint logic?

Thanks!

[leastprivilege]

Important update

This organization is not maintained anymore besides critical security bugfixes (if feasible). This organization will be archived when .NET Core 3.1 end of support is reached (3rd Dec 2022). All new development is happening in the new Duende Software organization.

The new Duende IdentityServer comes with a commercial license but is free for dev/testing/personal projects and companies or individuals making less than 1M USD gross annnual revenue. Please get in touch with us if you have any question.

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