public static NameValueCollection GetQueryString(string url)
{
if (string.IsNullOrEmpty(url) || url.IndexOf("?", StringComparison.Ordinal) == -1)
{
return(new NameValueCollection());
}
var querystring = url.Substring(url.IndexOf("?", StringComparison.Ordinal) + 1);
return(TranslateUtils.ToNameValueCollection(querystring));
}
public static NameValueCollection GetQueryStringFilterXss(string url)
{
if (string.IsNullOrEmpty(url) || url.IndexOf("?", StringComparison.Ordinal) == -1)
{
return(new NameValueCollection());
}
var attributes = new NameValueCollection();
var querystring = url.Substring(url.IndexOf("?", StringComparison.Ordinal) + 1);
var originals = TranslateUtils.ToNameValueCollection(querystring);
foreach (string key in originals.Keys)
{
attributes[key] = AttackUtils.FilterXss(originals[key]);
}
return(attributes);
}
public static string AddQueryStringIfNotExists(string url, NameValueCollection queryString)
{
if (queryString == null || url == null || queryString.Count == 0)
{
return(url);
}
var index = url.IndexOf("?", StringComparison.Ordinal);
if (index != -1)
{
var query = TranslateUtils.ToNameValueCollection(url.Substring(index).Trim('?', '&'), '&');
foreach (string key in query.Keys)
{
if (queryString[key] != null)
{
queryString.Remove(key);
}
}
}
return(AddQueryString(url, queryString));
}
