sdk/src/com/socialize/oauth/signpost/AbstractOAuthConsumer.java
protected void collectQueryParameters(HttpRequest request, HttpParameters out) {

        String url = request.getRequestUrl();
        int q = url.indexOf('?');
        if (q >= 0) {
            // Combine the URL query string with the other parameters:
            out.putAll(OAuth.decodeForm(url.substring(q + 1)), true);
        }
    }
protected void collectQueryParameters(HttpRequest request, HttpParameters out) {

        String url = request.getRequestUrl();
        int q = url.indexOf('?');
        if (q >= 0) {
            // Combine the URL query string with the other parameters:
            out.putAll(OAuth.decodeForm(url.substring(q + 1)), true);
        }
    }
Collects HTTP GET query string parameters as per OAuth Core 1.0 spec
section 9.1.1