Why is my basic authentication working on POST, but not GET requests?

Below is a method I'm using to make calls to a REST API. It works fine with POST (i.e. param isHttpPOST=true), and returns results from the server (which requires basic authentication).

But when using the GET code path (isHttpPOST=false), the authentication fails, as if I provided no credentials at all. I cannot see why, as the auth code applies to POST and GET.

What else needs doing to authenticate on a GET request?

private static HttpResponse makeHttpApiCall(String url, String json, boolean isHttpPOST, String username, String password)
{
    DefaultHttpClient httpClient = new DefaultHttpClient();
    UsernamePasswordCredentials creds = new UsernamePasswordCredentials(username, password);
    开发者_Go百科httpClient.getCredentialsProvider().setCredentials(new AuthScope("blah.com", 80), creds);
    HttpResponse response;
    try {
        if ( isHttpPOST )
        {
            HttpPost httppost    = new HttpPost(url);
            StringEntity se = new StringEntity(json);
            se.setContentEncoding("UTF-8");
            httppost.setHeader("Content-Type", "application/json");
            httppost.setEntity(se);
            response = httpClient.execute(httppost);
        }
        else
        {
            HttpGet get = new HttpGet(url);
            response = httpClient.execute(get);
        }
    } catch (ClientProtocolException e) {
        Trace.e(TAG, "There was a protocol based error making API call", e);
        return null;
    } catch (IOException e) {
        Trace.e(TAG, "There was an IO Stream related error making API call", e);
        return null;
    } catch (Exception e) {
        Trace.e(TAG, "Failed to get a response from API call (unknown error)", e);
        return null;
    }
    return response;

}

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i got the same problem, but the other way around, it works on GET but not on POST.

if the server is yours, i would recommend to use a freeware called Wireshark, to check what's going on in the transmition itself.

using that tool, showed me that the client sometimes makes a first annonymous request before making a second authorized request, but then the server kinda loses it and doesn't respond.. i still can't solve this issue.. it's driving me nuts.