How to use

NettyMultipartBody

in

com.ning.http.client.providers.netty.request.body

nettyBody = new NettyMultipartBody(request.getParts(), request.getHeaders(), nettyConfig);

private NettyBody body(Request request, HttpMethod method) throws IOException {
  NettyBody nettyBody = null;
  if (method != HttpMethod.CONNECT) {
    Charset bodyCharset = request.getBodyEncoding() == null ? DEFAULT_CHARSET : Charset.forName(request.getBodyEncoding());
    if (request.getByteData() != null)
      nettyBody = new NettyByteArrayBody(request.getByteData());
    else if (request.getStringData() != null)
      nettyBody = new NettyByteArrayBody(request.getStringData().getBytes(bodyCharset));
    else if (request.getStreamData() != null)
      nettyBody = new NettyInputStreamBody(request.getStreamData());
    else if (isNonEmpty(request.getFormParams())) {
      String contentType = null;
      if (!request.getHeaders().containsKey(HttpHeaders.Names.CONTENT_TYPE))
        contentType = HttpHeaders.Values.APPLICATION_X_WWW_FORM_URLENCODED;
      nettyBody = new NettyByteArrayBody(computeBodyFromParams(request.getFormParams(), bodyCharset), contentType);
    } else if (isNonEmpty(request.getParts()))
      nettyBody = new NettyMultipartBody(request.getParts(), request.getHeaders(), nettyConfig);
    else if (request.getFile() != null)
      nettyBody = new NettyFileBody(request.getFile(), nettyConfig);
    else if (request.getBodyGenerator() instanceof FileBodyGenerator) {
      FileBodyGenerator fileBodyGenerator = (FileBodyGenerator) request.getBodyGenerator();
      nettyBody = new NettyFileBody(fileBodyGenerator.getFile(), fileBodyGenerator.getRegionSeek(),
          fileBodyGenerator.getRegionLength(), nettyConfig);
    } else if (request.getBodyGenerator() instanceof InputStreamBodyGenerator)
      nettyBody = new NettyInputStreamBody(InputStreamBodyGenerator.class.cast(request.getBodyGenerator()).getInputStream());
    else if (request.getBodyGenerator() != null)
      nettyBody = new NettyBodyBody(request.getBodyGenerator().createBody(), nettyConfig);
  }
  return nettyBody;
}