HttpWebRequest for ShoutCast on Windows Phone7

Question

Hi

I tring to stream shoutcast stream in my window phone 7 app

I start an async HttpWebRequest like this

//Init Request

HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create("http://ACommonoShoutCastUrl:8000");

myHttpWebRequest.Headers["Icy-MetaData"] = "1";

myHttpWebRequest.UserAgent = "WinampMPEG/5.09";

myHttpWebRequest.AllowReadStreamBuffering = true;

//Call

 // Create an instance of the RequestState and assign the previous myHttpWebRequest object to its request field.  

RequestState myRequestState = new RequestState();

 myRequestState.request = myHttpWebRequest;

 // Start the asynchronous request.

 IAsyncResult result = (IAsyncResult)myHttpWebRequest.BeginGetResponse(new AsyncCallback(RespCallBack), myRequestState);

The problem is that the CallBack->RespCallBack is never called...

This code worked for me normally in other environments but not on the phone...

I tired also to use WebClient that seems to stream data,

the problem in this case is that it never call the end OpenReadCompleted because of endelss shoutcast stream

Thanks for support

any help would be appreciated

Answer 1

I just put the following on a page and the callback was called in repsonse to the button click. (I set a break point on the throw statement and it was hit.)

    private HttpWebRequest myHttpWebRequest;

    public MainPage()
    {
        InitializeComponent();
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        //Init Request 
        //The following URI was chosen at random
        myHttpWebRequest = (HttpWebRequest)WebRequest.Create("http://yp.shoutcast.com/sbin/tunein-station.pls?id=1377200");
        myHttpWebRequest.Headers["Icy-MetaData"] = "1";
        myHttpWebRequest.UserAgent = "WinampMPEG/5.09";
        myHttpWebRequest.AllowReadStreamBuffering = true;

        // Start the asynchronous request.
        myHttpWebRequest.BeginGetResponse(RespCallBack, myHttpWebRequest);
    }

    private void RespCallBack(IAsyncResult ar)
    {
        throw new NotImplementedException();
    }

Answer 2

SHOUTcast implements its own protocol so you can't directly access and play it. You can use DownloadStringAsync (you will need a WebClient instance for this) to download the PLS file and read the URL with the help of RegEx.

When you get the URL, you can read the raw audio data by implementing MediaStreamSource and then use a MediaElement to play the contents.

You can find a sample implementation of MediaStreamSource here.