gistfile1.java

    @Test(groups = "standalone", enabled = false)
    public void basicDefaultTest() throws Throwable {
        AsyncHttpClientConfig client = new AsyncHttpClientConfig.Builder().setResumableDownload(true).build();
        AsyncHttpClient c = new AsyncHttpClient(client);

        final RandomAccessFile file = new RandomAccessFile("shrek1.avi", "rw");
        Response r = c.prepareGet("http://192.168.2.106:8081/shrek1.AVI")
                .setHeader("Range", "bytes=" + file.length() + "-")
                .execute(new AsyncCompletionHandlerBase() {

            /* @Override */
            public STATE onBodyPartReceived(final HttpResponseBodyPart content) throws Exception {

                file.seek(file.length());
                file.write(content.getBodyPartBytes());

                return STATE.CONTINUE;
            }

        }).get();

        assertEquals(r.getStatusCode(), 200);
        file.close();
    }