/**
* @param req The request.
* @return The query string of the request in its raw (not URI-encoded) form. This is suitable for
* passing as the 'query' parameter to one of the multi-argument {@link URI} constructors.
*/
private static String getQueryString(HttpServletRequest req) throws UnsupportedEncodingException {
StringBuilder buf = new StringBuilder();
Map<String, String[]> params = req.getParameterMap();
if (params.size() == 0) return null;
for (Entry<String, String[]> entry : params.entrySet()) {
String name = entry.getKey();
String[] values = entry.getValue();
if (values.length == 0) {
buf.append("&").append(name);
} else {
for (String value : values) {
buf.append("&").append(name).append("=").append(value);
}
}
}
return buf.substring(1);
}
