How to do multipart/mixed upload with Restlet?

[cyberquarks]

Which version of Restlet supports multipart/mixed upload?

The idea is to be able to upload a binary along with JSON in one request.

[kerbymart]

I made a test for this:

@Post
public void acceptFormUpload(Representation entity) throws Exception {
    if (entity == null) {
        throw new ResourceException(400); // Bad request
    }

    if (MediaType.MULTIPART_FORM_DATA.equals(entity.getMediaType(), true)) {
        FileItemFactory factory = new DiskFileItemFactory();
        RestletFileUpload fileUpload = new RestletFileUpload(factory);
        List<FileItem> fileItems = fileUpload.parseRepresentation(entity);

        if (fileItems == null) {
            throw new ResourceException(400); // Bad request
        }

        for (FileItem fileItem : fileItems) {
            if (fileItem.isFormField()) {
                String fieldName = fileItem.getFieldName();
                String fieldValue = fileItem.getString();

                System.out.println("Field name: " + fieldName + ", Value: " + fieldValue);
            }
            else {
                String fieldName = fileItem.getFieldName();
                String fileName = fileItem.getName();
                long fileSize = fileItem.getSize();

                System.out.println("File size: " + fileSize + " bytes");
            }
        }
    } else {
        throw new ResourceException(415); // Unsupported media type
    }
}

I tried this with:

POST http://localhost:8080
Content-Type: multipart/form-data; boundary=*****BoundaryMarker*****

--*****BoundaryMarker*****
Content-Disposition: form-data; name="file"; filename="2024-03-31T081059.200.json"
Content-Type: application/json

And with:

POST http://localhost:8080
Content-Type: multipart/form-data; boundary=WebAppBoundary

--WebAppBoundary
Content-Disposition: form-data; name="textfield"

textvalue

--WebAppBoundary
Content-Disposition: form-data; name="radiobutton"

selectedvalue

--WebAppBoundary
Content-Disposition: form-data; name="checkbox"

true

--WebAppBoundary--

And:

POST http://localhost:8080
Content-Type: multipart/form-data; boundary=WebAppBoundary

--WebAppBoundary
Content-Disposition: form-data; name="textfield"

textvalue

--WebAppBoundary
Content-Disposition: form-data; name="radiobutton"

selectedvalue

--WebAppBoundary
Content-Disposition: form-data; name="checkbox"

true

--WebAppBoundary
Content-Disposition: form-data; name="file"; filename="2024-03-31T081059.200.json"
Content-Type: application/json

<@2024-03-31T081059.200.json
--WebAppBoundary--

It works.