Quarkus resteasy-reactive upload byte[] without file creation

Question

I want to keep uploaded files only in memory, so I tried to create a service that accepts multipartformdata as byte[]. However, every upload creates a temporary file and I cannot let this run stateless / read-only.

I use it like this

public class FormData {
    @FormParam("myFile")
    @PartType(MediaType.APPLICATION_OCTET_STREAM)
    public byte[] binaryPart;
}

Answer 1

I was able to solve this with Quarkus Version 3+ by using a JAXB-Class like this:

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class MultipartBody {

    @RestForm("name")
    @XmlMimeType((MediaType.TEXT_PLAIN))
    String name;

    @RestForm("file")
    @XmlMimeType(MediaType.APPLICATION_OCTET_STREAM)
    byte[] bytes;
}

I think this was simply a bug in the resteasy-reactive implementation that has been fixed in later Quarkus versions. In Quarkus 2 I had to rely on resteasy-classic.