private IEnumerable <IEnvelope <SyslogData> > ParseRfc5424Log(StreamReader sr, LogContext context)
{
var packet = new Rfc5424Packet();
var parser = new Rfc5424Parser();
while (!sr.EndOfStream)
{
// TODO change the ReadLine() functionality to using the full-line reader
var line = sr.ReadLine();
context.LineNumber++;
if (!string.IsNullOrWhiteSpace(line))
{
var valid = parser.ParseString(line, ref packet);
if (!valid)
{
_logger.LogWarning($"Unable to parse record at line {context.LineNumber} in file {context.FilePath}. Record may be in invalid format");
}
var record = new SyslogData(
packet.TimeStamp ?? DateTimeOffset.Now,
packet.HostName,
packet.AppName,
packet.Message);
yield return(new LogEnvelope <SyslogData>(record,
record.Timestamp.DateTime.ToUniversalTime(),
line,
context.FilePath,
context.Position,
context.LineNumber));
}
}
}
private async Task ParseRfc5424Log(LineReader reader, LogContext context, IList <IEnvelope <SyslogData> > output,
int recordCount, CancellationToken stopToken)
{
var packet = new Rfc5424Packet();
var parser = new Rfc5424Parser();
var linesCount = 0;
while (linesCount < recordCount)
{
stopToken.ThrowIfCancellationRequested();
var(line, consumed) = await reader.ReadAsync(stopToken);
_logger.LogTrace("File: '{0}', line: '{1}', bytes: {2}", context.FilePath, line, consumed);
context.Position += consumed;
if (line is null)
{
break;
}
context.LineNumber++;
var valid = parser.ParseString(line, ref packet);
if (!valid)
{
_logger.LogWarning($"Unable to parse record at line {context.LineNumber} in file {context.FilePath}. Record may be in invalid format");
}
var record = new SyslogData(
packet.TimeStamp ?? DateTimeOffset.Now,
packet.HostName,
packet.AppName,
packet.Message);
var envelope = new LogEnvelope <SyslogData>(
record,
record.Timestamp.UtcDateTime,
line,
context.FilePath,
context.Position,
context.LineNumber);
output.Add(envelope);
linesCount++;
}
}
