> You can't compose the OK verb with any AsyncHandler like I'm trying to
> do (as far as I can tell), but you can get the job done by defining
> your own AsynchHandler implementation -- basically a replacement for
> the AsynchHandler returned by as.stream.Lines.apply().

> See the source for dispatch.as.stream.Lines.apply(), which basically
> just returns an AsynchHandler that: (1) ignores the response status
> code; and (2) always produces a Unit response. Its a pretty simple
> thing to write your own version that actually does pay attention to
> the response status code, and throws an appropriate exception (such as
> dispatch.StatusCode) for non-2xx responses.

> Brian Maso

> On Wednesday, October 31, 2012 7:09:26 AM UTC-7, Brian Maso wrote:

>     I've successfully made the transition from 0.8.8 asynch Futures to
>     0.9.3 Promises. Not that hard in the end (except for one issue,
>     which I'll post about in a separate topic).

>     One feature I couldn't figure out ever in 0.8.8 seems to continue
>     being a tough nut to crack (at least for me) in 0.9.3: how apply a
>     HeaderVerb to a streaming handler? Specifically, I'd like to do
>     something like the following:

>     val promise = someUrl / path OK as.stream.Lines({ line => ... })

>     But these things just don't compose, not as far as I can tell.
>     That is, the OK verb just won't accept the as.stream.Lines.
>     Basically the problem I have is that I need to "know" when I'm
>     getting a 4xx or 5xx response vs. a 2xx response, and react
>     accordingly. Is there a way to do such a thing? Or maybe its
>     easier than I think, and somehow I can get the status code from
>     the promise?

>     Brian Maso