[Resteasy-developers] RESTEasy 3 Client: How to POST a multipart/form-data?

[John U. <uj...@gm...>]

Hi all,

how can I make a multipart/form-data POST with the JAX-RS Client API and
RESTEasy 3?

With RESTEasy 2, I used the client proxy framework
<http://docs.jboss.org/resteasy/docs/2.3.7.Final/userguide/html/RESTEasy_Client_Framework.html>
with an interface method like this:

@POST
@Path("/path/...")
@Consumes("multipart/form-data")
@Produces("application/json")
ClientResponse<MyResponse>
myRequest(@PartType(MediaType.APPLICATION_OCTET_STREAM) Map<String,
javax.activation.DataSource> parts);

With RESTEasy 3, I'm switching to the official JAX-RS Client API. I
tried to start with something like this:

Map<String, javax.activation.DataSource> parts = ...;
client.target("/path/...").request().accept(APPLICATION_JSON_TYPE).post(Entity.entity(parts,
MULTIPART_FORM_DATA_TYPE));

But it gives me:

Caused by: javax.ws.rs.ProcessingException: RESTEASY003215: could not
find writer for content-type multipart/form-data type:
java.util.HashMap
	at org.jboss.resteasy.core.interception.ClientWriterInterceptorContext.throwWriterNotFoundException(ClientWriterInterceptorContext.java:40)
        ...

Thanks,

John