Errors caused by default content-type

[HHongSeungWoo]

https://github.com/drwpow/openapi-typescript/blob/ad894a5697f852709c745c22e974991b9b8b4925/packages/openapi-fetch/src/index.ts#L3C8-L3C8

If the request headers has content-type and the body is empty, Fastify does not process the request and returns an error.
Is there a reason to set content-type: application/json as the default headers?

[drwpow]

I thought that all JSON APIs expected "Content-Type": "application/json"? This is the first I’ve heard of it causing issues.

But you do have a good point which is it’s impossible to unset default headers in the client. While I think "Content-Type": "application/json" is a good default, you should still be able to unset that if desired.

[drwpow]

Starting in 0.7.4 you can unset the default headers with:

createClient({ headers: { "content-type": null } })

Note: undefined will just be ignored; null is required to unset