RestyGWT: does it support plain text?

Question

I'm not able to receive plain text using RestyGWT. A very simple test service looks like this:

@GET
@Consumes(MediaType.TEXT_PLAIN)
@Produces(MediaType.TEXT_PLAIN)
void test(MethodCallback<String> callback);

On the client side I always get:

Response was NOT a valid JSON document

Looking at the HTTP response I'm seeing that content type is set correctly:

Content-Type:text/plain

What's the problem? Why RestyGWT tries to parse this as JSON? Am I doing smth wrong?

Answer 1

Well, RestyGWT is a Json library, AFAIK it is not made to handle plain text, or XML, or anything else. "foo" isn't a valid Json data, should be ["foo"] or {"stuff": "foo"}.

Indeed, in our Rest API, we tried to send pure text (an id), but we finally made a simple object wrapping the id.

Answer 2

If you will use TextCallback instead of MethodCallback<String> you won't get this error. It will set Accept header automatically to text/plain, so you don't have to use @Produces adnotation in your async interface.