public virtual void Dispose()
{
BackendReader?.Dispose();
BackendStream?.Dispose();
BackendReader = null;
BackendStream = null;
}
public virtual RirIpRecord NextEntry()
{
string line;
while (true)
{
BackendLineIndex++;
if (BackendReader.EndOfStream)
{
return(null); // End of stream
}
line = BackendReader.ReadLine();
if (string.IsNullOrWhiteSpace(line))
{
continue;
}
line = line.Trim();
try
{
if (line[0] == '#' || line[0] == ';')
{
continue; // Skip comment
}
string[] parts = line.Split('|', StringSplitOptions.None);
if (HeaderLineIndex == -1)
{
// Check header
if (parts[0].Trim() != "2" || !string.Equals(parts[1].Trim(), RirIdentifierString, StringComparison.OrdinalIgnoreCase))
{
throw new RirFileReaderException(line, BackendLineIndex, "No valid header found.");
}
HeaderLineIndex = BackendLineIndex;
continue;
}
if (parts.Length < 6)
{
throw new RirFileReaderException(line, BackendLineIndex, "Not a valid record.");
}
if (!string.Equals(parts[0].Trim(), RirIdentifierString, StringComparison.OrdinalIgnoreCase))
{
throw new RirFileReaderException(line, BackendLineIndex, "Unexpected record start organizational unit.");
}
if (string.Equals(parts[5].Trim(), "summary", StringComparison.OrdinalIgnoreCase))
{
continue; // Skip summary line
}
if (parts.Length < 7)
{
throw new RirFileReaderException(line, BackendLineIndex, "Not a valid record.");
}
if (string.Equals(parts[2].Trim(), "asn", StringComparison.OrdinalIgnoreCase))
{
continue; // Skip ASN record
}
if (string.Equals(parts[2].Trim(), "ipv6", StringComparison.OrdinalIgnoreCase))
{
continue; // Skip ipv6 record
}
if (string.Equals(parts[2].Trim(), "ipv4", StringComparison.OrdinalIgnoreCase))
{
// Process ipv4 record
DateTime createdAt = DateTime.MinValue;
if (int.Parse(parts[5].Trim()) >= 19500101)
{
createdAt = DateTime.ParseExact(parts[5].Trim(), "yyyyMMdd", System.Globalization.CultureInfo.InvariantCulture);
}
RirIpRecord entry = new RirIpRecord(Settings.IsoCountryCodes, parts[1].Trim(), parts[3].Trim(), long.Parse(parts[4].Trim()), createdAt, parts[6].Trim());
return(entry);
}
throw new RirFileReaderException(line, BackendLineIndex, "Unknown row on database file.");
}
catch (RirFileReaderException)
{
throw;
}
catch (Exception ex)
{
throw new RirFileReaderException(line, BackendLineIndex, ex.Message, ex);
}
}
}
