ByteArrayHeaderParser.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Net.Http.Headers;
 
internal sealed class ByteArrayHeaderParser : HttpHeaderParser
{
    internal static readonly ByteArrayHeaderParser Parser = new ByteArrayHeaderParser();
 
    private ByteArrayHeaderParser()
        : base(supportsMultipleValues: false)
    {
    }
 
    public override string ToString(object value)
    {
        return Convert.ToBase64String((byte[])value);
    }
 
    public override bool TryParseValue([NotNullWhen(true)] string value, object storeValue, ref int index, [NotNullWhen(true)] out object parsedValue)
    {
        parsedValue = null;
        if (string.IsNullOrEmpty(value) || index == value.Length)
        {
            return false;
        }
        string text = value;
        if (index > 0)
        {
            text = value.Substring(index);
        }
        try
        {
            parsedValue = Convert.FromBase64String(text);
            index = value.Length;
            return true;
        }
        catch (FormatException ex)
        {
            if (System.Net.NetEventSource.Log.IsEnabled())
            {
                System.Net.NetEventSource.Error(this, System.SR.Format(System.SR.net_http_parser_invalid_base64_string, text, ex.Message), "TryParseValue");
            }
        }
        return false;
    }
}