public IppResponseMessage ReadIppResponse(Stream stream)
{
var res = new IppResponseMessage();
try
{
using var reader = new BinaryReader(stream, Encoding.ASCII, true);
res.Version = (IppVersion)reader.ReadInt16BigEndian();
res.StatusCode = (IppStatusCode)reader.ReadInt16BigEndian();
res.RequestId = reader.ReadInt32BigEndian();
ReadSection(reader, res);
return(res);
}
catch (Exception ex)
{
throw new IppResponseException(
$"Failed to parse ipp response. Current response parsing ended on: \n{res}", ex, res);
}
}
private void ReadSection(BinaryReader reader, IppResponseMessage res)
{
IppAttribute? prevAttribute = null;
List <IppAttribute>?attributes = null;
do
{
var data = reader.ReadByte();
var sectionTag = (SectionTag)data;
switch (sectionTag)
{
//https://tools.ietf.org/html/rfc8010#section-3.5.1
case SectionTag.EndOfAttributesTag: return;
case SectionTag.Reserved:
case SectionTag.OperationAttributesTag:
case SectionTag.JobAttributesTag:
case SectionTag.PrinterAttributesTag:
case SectionTag.UnsupportedAttributesTag:
var section = new IppSection {
Tag = sectionTag
};
res.Sections.Add(section);
attributes = section.Attributes;
break;
default:
var attribute = ReadAttribute((Tag)data, reader, prevAttribute);
prevAttribute = attribute;
if (attributes == null)
{
throw new ArgumentException(
$"Section start tag not found in stream. Expected < 0x06. Actual: {data}");
}
attributes.Add(attribute);
break;
}
} while (true);
}
public static IDictionary <string, IppAttribute[]> AllAttributes(this IppResponseMessage ippResponseMessage) => ippResponseMessage.Sections.SelectMany(x => x.Attributes) .GroupBy(x => x.Name) .ToDictionary(g => g.Key, g => g.ToArray());
public IppResponseException(IppResponseMessage responseMessage)
{
ResponseMessage = responseMessage;
}
public IppResponseException(string message, Exception innerException, IppResponseMessage responseMessage) :
base(message, innerException)
{
ResponseMessage = responseMessage;
}
public IppResponseException(string message, IppResponseMessage responseMessage) : base(message)
{
ResponseMessage = responseMessage;
}
protected IppResponseException(SerializationInfo info, StreamingContext context,
IppResponseMessage responseMessage) : base(info, context)
{
ResponseMessage = responseMessage;
}