how to get redirect url from response with HttpClient 4?

[BrianP]

I've got a basic connection and request/response working with HttpClient. 
But it appears to be redirecting, and I need that redirected url because I
need to post to it.  Where/how can I get that with the org.apache.http.foo
classes?  I've been digging around in the docs for awhile and can't find it. 
I thought there was a location header or response url header, but I've
logged the headers and the url isn't there either.

For example, I'm doing my first request to http://myservice.com and it's
responding with
http://myservice.com/(S(jaaxb545nlp3p455mfcz2qbm))/index.aspx. 

Here's my code:

HttpClient client = new DefaultHttpClient();
HttpGet getMethod = new HttpGet("http://myservice.com";);
try {
    HttpResponse response = client.execute(getMethod);
    String res = EntityUtils.toString(response.getEntity());
    String viewState = extractParm(res, "__VIEWSTATE");
    log(viewState);
   
    Header[] headers = response.getAllHeaders();
    for(Header header : headers) {
        log(header.getName() + " : " + header.getValue());
    }
           
    // getting ready for post
    List<NameValuePair> pairs = new ArrayList<NameValuePair>();
    pairs.add(new BasicNameValuePair("__VIEWSTATE", viewState));

} catch (Exception e) {
    e.printStackTrace();
    log(e.getMessage());
}

Thanks
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