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kotlinlang

Hey guys,
what would be a good approach for using `.receive&lt;…&gt;()` and `ContentNegotiation` with `GET` requests?

Since most clients can't sent a request entity along `GET` requests (although theoretically possible) I'd like to add a ktor feature which
• takes two URL parameters like `contentType=application/json` and `entity={…}` (properly URL-encoded),
• modifies the `Request` to return the value of query parameter `contentType` as `Content-Type` header and
• pass the value of the query parameter `entity` as a `ByteReadChannel` into the `receivePipeline`.
Now `ContentNegotiation` would properly pick them up and all `.receive…()` functions work as expected (#theory).

Unfortunately `context` (aka `call`), `call.request` and `call.request.headers` are all immutable, so modifying the headers won't work.
So what else could I do to solve that issue without reinventing `ContentNegotiation` or somehow simulating the a new pipeline to make it happy?