All uploaded files used wrong mediatypes

[hantsy]

Glassfish 7.0M6, Java 17, Windows 10.

I used the following client codes to upload files,

List<EntityPart> parts = List.of(
                EntityPart.withName("textFile").fileName("test.txt")
                        .content(this.getClass().getResourceAsStream("/test.txt"))
                        .mediaType(MediaType.TEXT_PLAIN_TYPE)
                        .build(),
                EntityPart.withName("imageFile").fileName("test.svg")
                        .content(this.getClass().getResourceAsStream("/test.svg"))
                        .mediaType(MediaType.APPLICATION_SVG_XML_TYPE)
                        .build()
        );
        var genericEntity = new GenericEntity<List<EntityPart>>(parts) {
        };
        var entity = Entity.entity(genericEntity, MediaType.MULTIPART_FORM_DATA);
        Response r = target.request().post(entity);

The server side codes are like this.

 @Path("list")
    @POST
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    public Response uploadMultiFiles(List<EntityPart> parts) {
        LOGGER.log(Level.INFO, "Uploading files: {0}", parts.size());
        parts.forEach(
                part -> {
                    LOGGER.log(
                            Level.INFO,
                            "{0},{1},{2},{3}",
                            new Object[]{
                                    part.getMediaType(),
                                    part.getName(),
                                    part.getFileName(),
                                    part.getHeaders()
                            }
                    );
                    try {
                        copy(part.getContent(), Paths.get(uploadedPath.toString(), part.getFileName().get()), StandardCopyOption.REPLACE_EXISTING);
                    } catch (IOException e) {
                        throw new RuntimeException(e);
                    }
                }
        );

        return Response.ok().build();
    }

Running the client in tests, in the Glassfish server.log, all mediatypes are changed to application/octet-stream.

[2022-07-16T23:28:38.775+0800] [glassfish 7.0] [INFO] [] [com.example.MultipartResource] [tid: _ThreadID=41 _ThreadName=http-listener-1(4)] [timeMillis: 1657985318775] [levelValue: 800] [[
  Uploading files: 2]]

[2022-07-16T23:28:38.778+0800] [glassfish 7.0] [INFO] [] [com.example.MultipartResource] [tid: _ThreadID=41 _ThreadName=http-listener-1(4)] [timeMillis: 1657985318778] [levelValue: 800] [[
  application/octet-stream,textFile,Optional[test.txt],{Content-Type=[application/octet-stream], Content-Disposition=[form-data; filename="test.txt"; name="textFile"]}]]

[2022-07-16T23:28:38.787+0800] [glassfish 7.0] [INFO] [] [com.example.MultipartResource] [tid: _ThreadID=41 _ThreadName=http-listener-1(4)] [timeMillis: 1657985318787] [levelValue: 800] [[
  application/octet-stream,imageFile,Optional[test.svg],{Content-Type=[application/octet-stream], Content-Disposition=[form-data; filename="test.svg"; name="imageFile"]}]]

The example project to produce the issue: https://github.com/hantsy/jakartaee10-sandbox/tree/master/rest

[jansupol]

Yes, this is a bug. Thank you!