using System;
namespace SPSolutions.Web
{
	public class HttpUtil
	{
		public static string BuildCustomUrlWithFallback(string customUrl, string baseUrl, string fallbackUrl)
		{
			string text = string.IsNullOrEmpty(customUrl) ? fallbackUrl : customUrl;
			if (string.IsNullOrEmpty(text))
			{
				return string.Empty;
			}
			if (text.Contains("://"))
			{
				return text;
			}
			if (string.IsNullOrEmpty(baseUrl))
			{
				return string.Empty;
			}
			string str = (!baseUrl.EndsWith("/")) ? baseUrl : baseUrl.Substring(0, baseUrl.Length - 1);
			if (text.StartsWith("/"))
			{
				return str + text;
			}
			return str + "/" + text;
		}
		public static string AppendUrlQueryString(string url, string queryStringArgs)
		{
			if (string.IsNullOrEmpty(url))
			{
				return url;
			}
			int num = url.LastIndexOf("?");
			if (num == -1)
			{
				return url + "?" + queryStringArgs;
			}
			if (num == url.Length - 1)
			{
				return url + queryStringArgs;
			}
			return url + "&" + queryStringArgs;
		}
	}
}