On Mon, 20 Jun 2016 21:38:20 +0200, Jacob Carlborg wrote:

(...)

I see. Is it possible to somehow to do with the current version of
vibe.d, using some form of middleware of before hook? I thinking that
request could be modified to something the REST generator expects.

/Jacob Carlborg

If you just need to model the server side, it should work with @before: 

private Json extractContents(HTTPServerRequest req, HTTPServerResponse res)
{
    return req.json;
}

@before!extractContents("contents")
void postSomething(Json contents)
{
    // ...
}

The client side wouldn't really work, though, AFAICS.