Hi,

We're working with play framework 2.4.x and encounter problems when posting multipart form data to some webserver. Sometimes it happens that users upload empty files with size 0. In this case reading the Multipart body is stuck in an endless loop.

I was able to reproduce this behavior with async-http-client-1.9.32:

final List<Part> parts = new ArrayList<>();
byte[] emptyByteAray = {};
parts.add(new ByteArrayPart("baPart", emptyByteAray, "application/test", UTF_8, "fileName"));
final Body multipartBody = MultipartUtils.newMultipartBody(parts, new FluentCaseInsensitiveStringsMap());
final ByteBuffer buffer = ByteBuffer.allocate(8192);
    try {
        multipartBody.read(buffer);
    } catch (IOException e) {
        e.printStackTrace();
    }

I've also tested with async-http-client-project-2.0.0-RC7 and could not reproduce the issue anymore.

Would you mind providing a fix for 1.9.x?