I am trying to send an multipart/form-data response in my Citrus HTTP response:

test.$(
                http().server("converterServiceServer")
                        .send()
                        //Send configured status code
                        .response(httpStatus)                    
                        .message()
                        .contentType("multipart/form-data; boundary=" + boundary)
                        .type(MessageType.BINARY)
                        .body(new ClasspathResource("response.txt"))
        );

On client side the image can be extracted from the multipart request, but not be read. But if I read the response.txt file on client side manually, everything works fine.

I think the problem is, that Citrus converts every payload into a string, which corrupts my image file. How can I avoid this?

I tried the following and also to manually set the body by creating a custom Message or a MessagePayloadBuilder, but neither of them works. Citrus still want’s to convert the payload into a string.

My Citrus Version is 4.2 on Java 17 and Springboot 3.2.4