/// <summary>
/// Process a line, checking for ip addresses
/// </summary>
/// <param name="line">Line to process</param>
/// <returns>True</returns>
protected override bool OnProcessLine(string line)
{
IPBanLog.Debug("Parsing log file line {0}...", line);
IPAddressLogInfo info = IPBanService.GetIPAddressInfoFromRegex(dns, regex, line);
if (info.FoundMatch)
{
info.Source = info.Source ?? Source;
IPBanLog.Debug("Log file found match, ip: {0}, user: {1}, source: {2}, count: {3}", info.IPAddress, info.UserName, info.Source, info.Count);
failedLogin.AddFailedLogin(info);
}
else
{
IPBanLog.Debug("No match for line {0}", line);
}
return(true);
}
private bool PingFile(WatchedFile file, FileStream fs)
{
const int maxCountBeforeNewline = 1024;
int b;
long lastNewlinePos = -1;
byte[] bytes;
long end = Math.Min(file.LastLength, fs.Length);
int countBeforeNewline = 0;
fs.Position = file.LastPosition;
IPBanLog.Info("Processing watched file {0}, len = {1}, pos = {2}", file.FileName, file.LastLength, file.LastPosition);
while (fs.Position < end && countBeforeNewline++ != maxCountBeforeNewline)
{
// read until last \n is found
b = fs.ReadByte();
if (b == '\n')
{
lastNewlinePos = fs.Position - 1;
countBeforeNewline = 0;
}
}
if (countBeforeNewline == maxCountBeforeNewline)
{
throw new InvalidOperationException("Log file " + this.fileMask + " may not be a plain text new line delimited file");
}
if (lastNewlinePos > -1)
{
// set file position ready for the next read right after the newline
fs.Position = file.LastPosition;
bytes = new BinaryReader(fs).ReadBytes((int)(lastNewlinePos - fs.Position));
// set position for next ping
file.LastPosition = lastNewlinePos + 1;
// read text and run regex to find ip addresses to ban
string subString = Encoding.UTF8.GetString(bytes);
string[] lines = subString.Split('\n');
bool foundOne = false;
// find ip and user name from all lines
foreach (string line in lines)
{
string trimmedLine = line.Trim();
IPBanLog.Debug("Parsing log file line {0}...", trimmedLine);
IPAddressLogInfo info = IPBanService.GetIPAddressInfoFromRegex(dns, Regex, trimmedLine);
if (info.FoundMatch)
{
info.Source = info.Source ?? Source;
IPBanLog.Debug("Log file found match, ip: {0}, user: {1}, source: {2}, count: {3}", info.IPAddress, info.UserName, info.Source, info.Count);
failedLogin.AddFailedLogin(info);
foundOne = true;
}
else
{
IPBanLog.Debug("No match for line {0}", line);
}
}
if (foundOne)
{
// signal that we have found ip addresses
ipEvent.Set();
}
}
return(maxFileSize > 0 && fs.Length > maxFileSize);
}