/// <summary>
/// Creates a new <see cref="Error"/> from a list of headers
/// </summary>
/// <param name="headers">The <see cref="HeaderCollection"/> used to populate the object</param>
/// <returns><see cref="Error"/></returns>
public static Error FromHeaders(HeaderCollection headers)
{
int errorCode = headers.GetHeaderIntValue(Header.ERROR_CODE, true);
string description = headers.GetHeaderStringValue(Header.ERROR_DESCRIPTION, false);
Error error = new Error(errorCode, description);
SetInhertiedAttributesFromHeaders(error, headers);
return(error);
}
/// <summary>
/// Creates a new <see cref="Response"/> from a list of headers
/// </summary>
/// <param name="headers">The <see cref="HeaderCollection"/> used to populate the response</param>
/// <returns><see cref="Response"/></returns>
public new static Response FromHeaders(HeaderCollection headers)
{
int errorCode = headers.GetHeaderIntValue(Header.ERROR_CODE, true);
string description = headers.GetHeaderStringValue(Header.ERROR_DESCRIPTION, false);
Response response = new Response(errorCode, description);
SetInhertiedAttributesFromHeaders(response, headers);
return(response);
}
/// <summary>
/// Parses a response message and returns the corresponding <see cref="Response"/> object
/// </summary>
/// <param name="message">The entire GNTP response message</param>
/// <param name="headers">The <see cref="HeaderCollection"/> of parsed header values</param>
/// <returns><see cref="Response"/></returns>
private Response Parse(string message, out HeaderCollection headers)
{
ResponseType responseType = ResponseType.ERROR;
Response response = null;
headers = new HeaderCollection();
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(message);
System.IO.MemoryStream stream = new System.IO.MemoryStream(bytes);
using (stream)
{
GNTPStreamReader reader = new GNTPStreamReader(stream);
using (reader)
{
bool isError = false;
bool isFirstLine = true;
while (!reader.EndOfStream)
{
string line = reader.ReadLine();
if (isFirstLine)
{
Match match = ParseGNTPHeaderLine(line);
if (match.Success)
{
this.version = match.Groups["Version"].Value;
this.directive = match.Groups["Directive"].Value;
if (this.directive.StartsWith("-", StringComparison.InvariantCulture))
{
this.directive = this.directive.Remove(0, 1);
}
if (version == GNTP_SUPPORTED_VERSION)
{
if (Enum.IsDefined(typeof(ResponseType), this.directive))
{
responseType = (ResponseType)Enum.Parse(typeof(ResponseType), this.directive, false);
response = new Response();
if (responseType == ResponseType.ERROR)
{
isError = true;
}
isFirstLine = false;
}
else
{
// invalid directive
response = new Response(ErrorCode.INVALID_REQUEST, "Unrecognized response type");
break;
}
}
else
{
// invalid version
response = new Response(ErrorCode.UNKNOWN_PROTOCOL_VERSION, "Unsupported version");
break;
}
}
else
{
// invalid message header
response = new Response(ErrorCode.UNKNOWN_PROTOCOL, "Unrecognized response");
break;
}
}
else
{
Header header = Header.ParseHeader(line);
headers.AddHeader(header);
}
}
if (response != null)
{
if (isError)
{
int errorCode = headers.GetHeaderIntValue(Header.ERROR_CODE, false);
string errorDescription = headers.GetHeaderStringValue(Header.ERROR_DESCRIPTION, false);
if (errorCode > 0 && errorDescription != null)
{
response = new Response(errorCode, errorDescription);
}
else
{
response = new Response(ErrorCode.INTERNAL_SERVER_ERROR, ErrorDescription.INTERNAL_SERVER_ERROR);
}
}
else
{
string inResponseTo = headers.GetHeaderStringValue(Header.RESPONSE_ACTION, false);
response.InResponseTo = inResponseTo;
}
response.SetAttributesFromHeaders(headers, (responseType == ResponseType.CALLBACK));
}
else
{
// if we got here, that is bad.
response = new Response(ErrorCode.INTERNAL_SERVER_ERROR, ErrorDescription.INTERNAL_SERVER_ERROR);
}
}
}
return(response);
}