UriUtil.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Web.Util;
 
internal static class UriUtil
{
    private static readonly char[] s_queryFragmentSeparators = new char[2] { '?', '#' };
 
    private static void ExtractQueryAndFragment(string input, out string path, out string queryAndFragment)
    {
        int num = input.IndexOfAny(s_queryFragmentSeparators);
        if (num != -1)
        {
            path = input.Substring(0, num);
            queryAndFragment = input.Substring(num);
        }
        else
        {
            path = input;
            queryAndFragment = null;
        }
    }
 
    internal static bool TrySplitUriForPathEncode(string input, [NotNullWhen(true)] out string schemeAndAuthority, [NotNullWhen(true)] out string path, out string queryAndFragment)
    {
        ExtractQueryAndFragment(input, out var path2, out queryAndFragment);
        if (Uri.TryCreate(path2, UriKind.Absolute, out Uri result))
        {
            string authority = result.Authority;
            if (!string.IsNullOrEmpty(authority))
            {
                int num = path2.IndexOf(authority, StringComparison.OrdinalIgnoreCase);
                if (num != -1)
                {
                    int num2 = num + authority.Length;
                    schemeAndAuthority = path2.Substring(0, num2);
                    path = path2.Substring(num2);
                    return true;
                }
            }
        }
        schemeAndAuthority = null;
        path = null;
        queryAndFragment = null;
        return false;
    }
}