//---------------------------------------------------------------------------
/// Meotoda odpowiada za w³aœciwe wyszukiwanie danych opini, metoda przyjmuje znaczniki pocz¹tkowe oraz koñcowe,
/// pomiêdzy którymi znajduj¹ siê po¿¹dane teksty.
AnsiString __fastcall ParsujDane::ZnajdzTekstOpini(AnsiString &ATextOpini, AnsiString AZnacznikPocz, AnsiString AZnacznikKoniec, bool ATnij)
{
AnsiString txt;
int pozycjaZnacznik, start, koniec;
pozycjaZnacznik = ATextOpini.Pos(AZnacznikPocz);
if (pozycjaZnacznik == 0) return "";
while (true)
{
txt += ATextOpini[pozycjaZnacznik];
if (ATnij) { if (txt.Pos(AZnacznikPocz) > 0) { txt = txt.Delete(1, AZnacznikPocz.Length()); } }
if (txt.Pos(AZnacznikKoniec) > 0) break;
pozycjaZnacznik++;
}
if (!ATnij)
{
start = AZnacznikPocz.Length() + 1;
koniec = txt.Length() - AZnacznikPocz.Length() - AZnacznikKoniec.Length();
}
else
{
start = 1;
koniec = txt.Length() - AZnacznikKoniec.Length();
}
txt = txt.SubString(start, koniec);
txt.TrimLeft(); txt.TrimRight();
return txt;
}
//---------------------------------------------------------------------------
/// Metoda odpowiedzialna za usunieciê przekazanych znaczników z przekazanego tekstu,
/// metoda umo¿liwia umieszczenie znacznika konca lini w zamian za przyjmowany znacznik
void __fastcall ParsujDane::UsunZnacznik(AnsiString &AText, AnsiString AZnacznik, bool AWstawENDL)
{
int pozycjaZnacznik, i;
i = 0;
while (true)
{
pozycjaZnacznik = AText.Pos(AZnacznik);
if (AZnacznik == ' ')
{
if (AText.Pos(' ') > 1) break;
}
if (pozycjaZnacznik > 0) AText.Delete(pozycjaZnacznik, AZnacznik.Length());
if (pozycjaZnacznik > 0 && AWstawENDL) AText.Insert("<ENDL>",pozycjaZnacznik);
if (pozycjaZnacznik == 0) break;
}
AText.TrimLeft(); AText.TrimRight();
}
// get the value of a parameter
bool MimeField::GetParameter(const char* pszAttr, AnsiString& strValue) const
{
strValue = "";
bool encodedParameter = false;
vector<AnsiString> parameters = StringParser::SplitString(AnsiString(m_strValue), ";");
for (unsigned int i = 1; i < parameters.size(); i++)
{
AnsiString value = parameters[i];
value.TrimLeft();
// Locate end of parameter name.
int nameEndPos = 0;
for (nameEndPos = 0; nameEndPos < value.GetLength(); nameEndPos++)
{
char c = value[nameEndPos];
if (c == ' ' || c == '*' || c == '=')
break;
}
// If we haven't found any value for this parameter, bail out.
if (nameEndPos == 0 && strValue.IsEmpty())
return false;
AnsiString parameterName = value.Mid(0, nameEndPos);
if (parameterName.CompareNoCase(pszAttr) != 0)
continue;
// Locate start of parameter value.
int valuePos = 0;
for (valuePos = nameEndPos; valuePos < value.GetLength(); valuePos++)
{
char c = value[valuePos];
if (c == '=')
break;
}
// We want the char before = NOT char after param name
// to detect encoding per RFC 2231 4.1
// http://www.hmailserver.com/forum/viewtopic.php?f=10&t=21417
char characterBeforeEquals = value[valuePos - 1];
if (characterBeforeEquals == '*')
encodedParameter = true;
// Skip past the equal sign.
valuePos++;
// Locate the start of the actual value. May be enclosed with quotes.
//
// For instance, this is perfectly valid
// Content-Type: text/plain; charset = "iso-8859-1"
//
for (; valuePos < value.GetLength(); valuePos++)
{
char c = value[valuePos];
if (c == ' ' || c == '"')
continue;
else
break;
}
// Locate the end of the value. The value may contain
// pretty much any character, including space.
int valueEndPos = valuePos;
for (; valueEndPos < value.GetLength(); valueEndPos++)
{
char c = value[valueEndPos];
if (c == ';' || c == '"')
break;
else
continue;
}
int valueLength = valueEndPos - valuePos;
value = value.Mid(valuePos, valueLength);
// If the value is
// Content-Type: text/plain; charset = "iso-8859-1"
// it needs to be trimmed.
value.TrimRight();
strValue.append(value);
}
if (strValue.IsEmpty())
return false;
/*
(2) MIME headers, like the RFC 822 headers they often
appear in, are limited to 7bit US-ASCII, and the
encoded-word mechanisms of RFC 2047 are not available
to parameter values. This makes it impossible to have
parameter values in character sets other than US-ASCII
without specifying some sort of private per-parameter
encoding.
http://tools.ietf.org/html/draft-freed-pvcsc-03
Examples:
Input: ISO-8859-1''%E9%2E%70%6E%67
Output: =?ISO-8859-1?Q?=E9=2Epng?=
*/
if (encodedParameter)
{
MimeParameterRFC2184Decoder decoder;
strValue.assign(decoder.Decode(strValue));
}
strValue.TrimLeft();
return true;
}
VirusScanningResult
ClamAVVirusScanner::Scan(const String &hostName, int primaryPort, const String &sFilename)
{
LOG_DEBUG("Connecting to ClamAV virus scanner...");
int streamPort = 0;
TimeoutCalculator calculator;
SynchronousConnection commandConnection(calculator.Calculate(IniFileSettings::Instance()->GetClamMinTimeout(), IniFileSettings::Instance()->GetClamMaxTimeout()));
if (!commandConnection.Connect(hostName, primaryPort))
{
return VirusScanningResult(_T("ClamAVVirusScanner::Scan"),
Formatter::Format("Unable to connect to ClamAV server at {0}:{1}.", hostName, primaryPort));
}
if (!commandConnection.Write("STREAM\r\n"))
return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to write STREAM command.");
AnsiString readData;
if (!commandConnection.ReadUntil("\n", readData))
return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to read STREAM command response.");
if (!readData.StartsWith("PORT"))
return VirusScanningResult("ClamAVVirusScanner::Scan", Formatter::Format("Protocol error. Unexpected response: {0}.", readData));
readData.TrimRight("\n");
// Determine port.
std::string portString = readData.Mid(5);
if (!StringParser::TryParseInt(portString, streamPort))
return VirusScanningResult("ClamAVVirusScanner::Scan", Formatter::Format("Protocol error. Unexpected response: {0} (Unable to parse port).", readData));
LOG_DEBUG("Connecting to ClamAV stream port...");
SynchronousConnection streamConnection(15);
if (!streamConnection.Connect(hostName, streamPort))
return VirusScanningResult("ClamAVVirusScanner::Scan", Formatter::Format("Unable to connect to ClamAV stream port at {0}:{1}.", hostName, streamPort));
// Send the file on the stream socket.
File oFile;
if (!oFile.Open(sFilename, File::OTReadOnly))
{
String sErrorMsg = Formatter::Format("Could not send file {0} via socket since it does not exist.", sFilename);
return VirusScanningResult("ClamAVVirusScanner::Scan", sErrorMsg);
}
const int STREAM_BLOCK_SIZE = 4096;
const int maxIterations = 100000;
for (int i = 0; i < maxIterations; i++)
{
std::shared_ptr<ByteBuffer> pBuf = oFile.ReadChunk(STREAM_BLOCK_SIZE);
if (!pBuf)
break;
// Send the request.
if (!streamConnection.Write(*pBuf))
return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to write data to stream port.");
}
streamConnection.Close();
if (!commandConnection.ReadUntil("\n", readData))
return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to read response (after streaming).");
readData.TrimRight("\n");
// Parse the response and see if a virus was reported.
try
{
const regex expression("^stream.*: (.*) FOUND$");
cmatch what;
if(regex_match(readData.c_str(), what, expression))
{
LOG_DEBUG("Virus detected: " + what[1]);
return VirusScanningResult(VirusScanningResult::VirusFound, String(what[1]));
}
else
{
LOG_DEBUG("No virus detected: " + readData);
return VirusScanningResult(VirusScanningResult::NoVirusFound, Formatter::Format("Result: {0}", readData));
}
}
catch (std::runtime_error &) // regex_match will throw runtime_error if regexp is too complex.
{
return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to parse regular expression.");
}
}