Support MultiPart form result in Resteasy Reactive

[andreas-eberle]

Describe the bug

It seems resteasy reactive cannot return a multipart body. In the reproducer below, I have a method like this

	@GET
	@Path("/multipart")
	@Produces(MediaType.MULTIPART_FORM_DATA)
	public MultipartDto getMultipart() throws IOException {
		File file = File.createTempFile("abc", "txt");

		var writer = new FileWriter(file);
		writer.write("Test ABC");
		writer.close();

		return new MultipartDto("test text", file);
	}

But when I call it, I only get the following body:

org.acme.MultipartDto@345fa2e

Expected behavior

Return a correct multipart form data response

Actual behavior

Only toString of the returned object is returned.

How to Reproduce?

1. Download reproducer from
   2021-10-26_restclient-reactive-multipart-response.zip
2. Start quarkus with ./gradlew quarkusDev
3. Call GET localhost:8080/hello/multipart

Output of uname -a or ver

No response

Output of java -version

No response

GraalVM version (if different from Java)

No response

Quarkus version or git rev

No response

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response

[quarkus-bot]

/cc @FroMage, @geoand, @stuartwdouglas

[geoand]

@Sgitario FYI

[andreas-eberle]

Hi @Sgitario! Thanks for the implementation. Does this implementation also apply to the resteasy reactive client?

[Sgitario]

Hi @Sgitario! Thanks for the implementation. Does this implementation also apply to the resteasy reactive client?

No, the reactive rest client does not support multipart formdata yet.