Java TCP / IP：HTTP连接到实时流

Question

I can connect to a HTTP-Livestream manually by using Sockets like that:

Socket radio = new Socket();
radio.connect(new InetSocketAddress("streaming.fueralle.org", 8000));
PrintWriter out = new PrintWriter(radio.getOutputStream());
out.println("GET /corax.mp3 HTTP/1.0");
out.println("User-Agent: Wget/1.8.2");
out.println("Host: streaming.fueralle.org:8000");
out.println("Accept: */*");
out.println("Connection: Keep-Alive");
out.println("");
out.flush();

DataInputStream is = new DataInputStream(radio.getInputStream());
String headerLine = is.readLine();
while(headerLine.length() > 0){
    resp.getWriter().println("next line is " + headerLine);
    headerLine = is.readLine();
}

Now I have to do this connection with URL and HttpUrlConnection instead (I plan to run it from Google App Engine, which allows no Socket). But I seem to be missing an important bit. If I try a static page like heise.de, it works. But I can not start reading a continuous Stream.

EDIT2: I have put the source (and the whole project) in github, do I miss a big thing? https://github.com/flaschenpost/GoogleAppRadio/blob/master/MGRadio/src/de/gergele/mgradio/MGRadioServlet.java

Here a snippet.

URL u = new URL("http://streaming.fueralle.org:8000/corax.mp3");
// URL u = new URL("http://www.heise.de");
System.out.println("trying to connect!" + u);
HttpURLConnection conn = (HttpURLConnection)u.openConnection();
conn.addRequestProperty("User-Agent", "MGet/1.0.0");
conn.addRequestProperty("Accept", "*/*");
// conn.addRequestProperty("Connection", "Keep-Alive");
// EDIT: I tried with and without setChunkedStreamingMode, I hoped it would 
//       tell the connection-object about the streaming mode from the server
conn.setChunkedStreamingMode(4096);
System.out.println("setup finished..." + conn + " " + conn.getRequestProperties().toString());
System.out.println(" type: " + conn.getContentType());

DataInputStream is = new DataInputStream(conn.getInputStream());

But that leads to an TimeoutException before reading a single character from the headers.

So now my question: Howo can I tune the HTTP-Connection to be as successfull as the Socket-Connection? Do I really have to write my own URLStreamHandlerFactory? Sounds a bit weird...

wget and curl get that stream easily, and I have already spent half a night to find out that Java URL seems to contain to much magic somehow for those livestreams.

Thanks for any help!

Answer 1

You can't use google app engine for live streaming. GAE framework has a time restriction on servlet execution time proof . If you go for background tasks (backend in gae) you will have to pay. And still you'll be only able to save the stream, not to stream it live.