GWT - Highchart export request - Read multipart/form-data parameters

Getting multipart-form-data request parameters in java servlet-

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
	throws IOException, ServletException {
	if (!ServletFileUpload.isMultipartContent(req)) {
	throw new ServletException("Not a file upload request");
	}
	ServletFileUpload upload = new ServletFileUpload();
	FileItemIterator iter;
	iter = upload.getItemIterator(req);
	while (iter.hasNext()) {
	FileItemStream item = iter.next();
	InputStream stream = item.openStream();
	if (item.isFormField()) {
	if (item.getFieldName().equalsIgnoreCase("svg")) {
	svg = Streams.asString(stream);
	}
	...
	...
	}
	}
	}

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