HttpUtilities.cs

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namespace System.Net.Http;
 
internal static class HttpUtilities
{
    internal static bool IsSupportedScheme(string scheme)
    {
        if (!IsSupportedNonSecureScheme(scheme))
        {
            return IsSupportedSecureScheme(scheme);
        }
        return true;
    }
 
    internal static bool IsSupportedNonSecureScheme(string scheme)
    {
        if (!string.Equals(scheme, "http", StringComparison.OrdinalIgnoreCase))
        {
            return IsNonSecureWebSocketScheme(scheme);
        }
        return true;
    }
 
    internal static bool IsSupportedSecureScheme(string scheme)
    {
        if (!string.Equals(scheme, "https", StringComparison.OrdinalIgnoreCase))
        {
            return IsSecureWebSocketScheme(scheme);
        }
        return true;
    }
 
    internal static bool IsNonSecureWebSocketScheme(string scheme)
    {
        return string.Equals(scheme, "ws", StringComparison.OrdinalIgnoreCase);
    }
 
    internal static bool IsSecureWebSocketScheme(string scheme)
    {
        return string.Equals(scheme, "wss", StringComparison.OrdinalIgnoreCase);
    }
 
    internal static bool IsSupportedProxyScheme(string scheme)
    {
        if (!string.Equals(scheme, "http", StringComparison.OrdinalIgnoreCase))
        {
            return IsSocksScheme(scheme);
        }
        return true;
    }
 
    internal static bool IsSocksScheme(string scheme)
    {
        if (!string.Equals(scheme, "socks5", StringComparison.OrdinalIgnoreCase) && !string.Equals(scheme, "socks4a", StringComparison.OrdinalIgnoreCase))
        {
            return string.Equals(scheme, "socks4", StringComparison.OrdinalIgnoreCase);
        }
        return true;
    }
}