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{
$Project$
$Workfile$
$Revision$
$DateUTC$
$Id$
This file is part of the Indy (Internet Direct) project, and is offered
under the dual-licensing agreement described on the Indy website.
(http://www.indyproject.org/)
Copyright:
(c) 1993-2005, Chad Z. Hower and the Indy Pit Crew. All rights reserved.
}
{
$Log$
}
{
Rev 1.8 7/23/04 1:32:08 PM RLebeau
Bug fix for TIdSyslogFacility where sfUUCP and sfClockDeamonOne were in the
wrong order
Rev 1.7 7/8/04 11:43:08 PM RLebeau
Updated ReadFromBytes(c) to use new BytesToString() parameters
Rev 1.6 2004.02.03 5:44:28 PM czhower
Name changes
Rev 1.5 1/31/2004 1:23:24 PM JPMugaas
Eliminated Todo item.
Rev 1.4 2004.01.22 3:23:36 PM czhower
IsCharInSet
Rev 1.3 1/21/2004 4:03:58 PM JPMugaas
InitComponent
Rev 1.2 10/24/2003 01:58:30 PM JPMugaas
Attempt to port Syslog over to new code.
Rev 1.1 2003.10.12 6:36:44 PM czhower
Now compiles.
Rev 1.0 11/13/2002 08:02:12 AM JPMugaas
}
unit IdSysLogMessage;
{
Copyright the Indy pit crew
Original Author: Stephane Grobety (grobety@fulgan.com)
Release history:
25/2/02; - Stephane Grobety
- Moved Facility and Severity translation functions out of the class
- Restored the "SendToHost" method
- Changed the ASCII check tzo include only the PRI and HEADER part.
- Now allow nul chars in message result (Special handeling should be required, though)
09/20/01; - J. Peter Mugaas
Added more properties dealing with Msg parts of the SysLog Message
09/19/01; - J. Peter Mugaas
restructured syslog classes
08/09/01: Dev started
}
interface
{$i IdCompilerDefines.inc}
uses
Classes,
IdGlobal, IdGlobalProtocols, IdBaseComponent;
type
// TIdSyslogSeverity = ID_SYSLOG_SEVERITY_EMERGENCY..ID_SYSLOG_SEVERITY_DEBUG;
// TIdSyslogFacility = ID_SYSLOG_FACILITY_KERNEL..ID_SYSLOG_FACILITY_LOCAL7;
TIdSyslogPRI = 0..191;
TIdSyslogFacility = (sfKernel, { ID_SYSLOG_FACILITY_KERNEL}
sfUserLevel, { ID_SYSLOG_FACILITY_USER }
sfMailSystem, { ID_SYSLOG_FACILITY_MAIL }
sfSystemDaemon, { ID_SYSLOG_FACILITY_SYS_DAEMON }
sfSecurityOne, { ID_SYSLOG_FACILITY_SECURITY1 }
sfSysLogInternal, { ID_SYSLOG_FACILITY_INTERNAL }
sfLPR, {ID_SYSLOG_FACILITY_LPR}
sfNNTP, { ID_SYSLOG_FACILITY_NNTP }
sfUUCP, { ID_SYSLOG_FACILITY_UUCP }
sfClockDaemonOne, { CILITY_CLOCK1 }
sfSecurityTwo, { ID_SYSLOG_FACILITY_SECURITY2 }
sfFTPDaemon, { ID_SYSLOG_FACILITY_FTP }
sfNTP, { ID_SYSLOG_FACILITY_NTP }
sfLogAudit, { ID_SYSLOG_FACILITY_AUDIT }
sfLogAlert, { ID_SYSLOG_FACILITY_ALERT }
sfClockDaemonTwo, { ID_SYSLOG_FACILITY_CLOCK2 }
sfLocalUseZero, { ID_SYSLOG_FACILITY_LOCAL0 }
sfLocalUseOne, { ID_SYSLOG_FACILITY_LOCAL1 }
sfLocalUseTwo, { ID_SYSLOG_FACILITY_LOCAL2 }
sfLocalUseThree, { ID_SYSLOG_FACILITY_LOCAL3 }
sfLocalUseFour, { ID_SYSLOG_FACILITY_LOCAL4 }
sfLocalUseFive, { ID_SYSLOG_FACILITY_LOCAL5 }
sfLocalUseSix, { ID_SYSLOG_FACILITY_LOCAL6 }
sfLocalUseSeven); { ID_SYSLOG_FACILITY_LOCAL7 }
TIdSyslogSeverity = (slEmergency, {0 - emergency - system unusable}
slAlert, {1 - action must be taken immediately }
slCritical, { 2 - critical conditions }
slError, {3 - error conditions }
slWarning, {4 - warning conditions }
slNotice, {5 - normal but signification condition }
slInformational, {6 - informational }
slDebug); {7 - debug-level messages }
TIdSysLogMsgPart = class(TPersistent)
protected
FPIDAvailable: Boolean;
FProcess: String;
FPID: Integer;
FContent: String;
procedure SetPID(AValue: Integer);
procedure SetProcess(const AValue: String);
function GetText: String;
procedure SetText(const AValue: String);
public
procedure Assign(Source: TPersistent); override;
published
property Text: String read GetText write SetText;
property PIDAvailable : Boolean read FPIDAvailable write FPIDAvailable stored false;
property Process : String read FProcess write SetProcess stored false;
property PID : Integer read FPID write SetPID stored false;
property Content : String read FContent write FContent stored false;
end;
TIdSysLogMessage = class(TIdBaseComponent)
protected
FMsg : TIdSysLogMsgPart;
FFacility: TidSyslogFacility;
FSeverity: TIdSyslogSeverity;
FHostname: string;
FMessage: String;
FTimeStamp: TDateTime;
FRawMessage: String;
FPeer: String;
FPri: TIdSyslogPRI;
FUDPCliComp: TIdBaseComponent;
procedure SetFacility(const AValue: TidSyslogFacility);
procedure SetSeverity(const AValue: TIdSyslogSeverity);
procedure SetHostname(const AValue: string);
procedure SetRawMessage(const Value: string);
procedure SetTimeStamp(const AValue: TDateTime);
procedure SetMsg(const AValue : TIdSysLogMsgPart);
procedure SetPri(const Value: TIdSyslogPRI);
function GetHeader: String;
procedure CheckASCIIRange(var Data: String); virtual;
procedure ReadPRI(var StartPos: Integer); virtual;
procedure ReadHeader(var StartPos: Integer); virtual;
procedure ReadMSG(var StartPos: Integer); virtual;
procedure Parse; virtual;
procedure UpdatePRI; virtual;
function DecodeTimeStamp(TimeStampString: String): TDateTime; virtual;
procedure InitComponent; override;
public
procedure Assign(Source: TPersistent); override;
destructor Destroy; override;
function EncodeMessage: String; virtual;
procedure ReadFromBytes(const ASrc: TIdBytes; const APeer : String); virtual;
//
property RawMessage: string read FRawMessage write SetRawMessage;
procedure SendToHost(const Dest: String);
property Peer: string read FPeer write FPeer;
property TimeStamp: TDateTime read FTimeStamp write SetTimeStamp;
published
property Pri: TIdSyslogPRI read FPri write SetPri default 13;
property Facility: TidSyslogFacility read FFacility write SetFacility stored false;
property Severity: TIdSyslogSeverity read FSeverity write SetSeverity stored false;
property Hostname: string read FHostname write SetHostname stored false;
property Msg : TIdSysLogMsgPart read FMsg write SetMsg;
end; // class
function FacilityToString(AFac: TIdSyslogFacility): string;
function SeverityToString(ASec: TIdsyslogSeverity): string;
function NoToSeverity(ASev : Word) : TIdSyslogSeverity;
function logSeverityToNo(ASev : TIdSyslogSeverity) : Word;
function NoToFacility(AFac : Word) : TIdSyslogFacility;
function logFacilityToNo(AFac : TIdSyslogFacility) : Word;
implementation
uses
IdAssignedNumbers, IdException, IdExceptionCore, IdResourceStringsProtocols, IdStack, IdStackConsts, IdUDPClient, SysUtils;
const
// facility
ID_SYSLOG_FACILITY_KERNEL = 0; // kernel messages
ID_SYSLOG_FACILITY_USER = 1; // user-level messages
ID_SYSLOG_FACILITY_MAIL = 2; // mail system
ID_SYSLOG_FACILITY_SYS_DAEMON = 3; // system daemons
ID_SYSLOG_FACILITY_SECURITY1 = 4; // security/authorization messages (1)
ID_SYSLOG_FACILITY_INTERNAL = 5; // messages generated internally by syslogd
ID_SYSLOG_FACILITY_LPR = 6; // line printer subsystem
ID_SYSLOG_FACILITY_NNTP = 7; // network news subsystem
ID_SYSLOG_FACILITY_UUCP = 8; // UUCP subsystem
ID_SYSLOG_FACILITY_CLOCK1 = 9; // clock daemon (1)
ID_SYSLOG_FACILITY_SECURITY2 = 10; // security/authorization messages (2)
ID_SYSLOG_FACILITY_FTP = 11; // FTP daemon
ID_SYSLOG_FACILITY_NTP = 12; // NTP subsystem
ID_SYSLOG_FACILITY_AUDIT = 13; // log audit
ID_SYSLOG_FACILITY_ALERT = 14; // log alert
ID_SYSLOG_FACILITY_CLOCK2 = 15; // clock daemon (2)
ID_SYSLOG_FACILITY_LOCAL0 = 16; // local use 0 (local0)
ID_SYSLOG_FACILITY_LOCAL1 = 17; // local use 1 (local1)
ID_SYSLOG_FACILITY_LOCAL2 = 18; // local use 2 (local2)
ID_SYSLOG_FACILITY_LOCAL3 = 19; // local use 3 (local3)
ID_SYSLOG_FACILITY_LOCAL4 = 20; // local use 4 (local4)
ID_SYSLOG_FACILITY_LOCAL5 = 21; // local use 5 (local5)
ID_SYSLOG_FACILITY_LOCAL6 = 22; // local use 6 (local6)
ID_SYSLOG_FACILITY_LOCAL7 = 23; // local use 7 (local7)
// Severity
ID_SYSLOG_SEVERITY_EMERGENCY = 0; // Emergency: system is unusable
ID_SYSLOG_SEVERITY_ALERT = 1; // Alert: action must be taken immediately
ID_SYSLOG_SEVERITY_CRITICAL = 2; // Critical: critical conditions
ID_SYSLOG_SEVERITY_ERROR = 3; // Error: error conditions
ID_SYSLOG_SEVERITY_WARNING = 4; // Warning: warning conditions
ID_SYSLOG_SEVERITY_NOTICE = 5; // Notice: normal but significant condition
ID_SYSLOG_SEVERITY_INFORMATIONAL = 6; // Informational: informational messages
ID_SYSLOG_SEVERITY_DEBUG = 7; // Debug: debug-level messages
function logFacilityToNo(AFac : TIdSyslogFacility) : Word;
begin
case AFac of
sfKernel : Result := ID_SYSLOG_FACILITY_KERNEL;
sfUserLevel : Result := ID_SYSLOG_FACILITY_USER;
sfMailSystem : Result := ID_SYSLOG_FACILITY_MAIL;
sfSystemDaemon : Result := ID_SYSLOG_FACILITY_SYS_DAEMON;
sfSecurityOne : Result := ID_SYSLOG_FACILITY_SECURITY1;
sfSysLogInternal : Result := ID_SYSLOG_FACILITY_INTERNAL;
sfLPR : Result := ID_SYSLOG_FACILITY_LPR;
sfNNTP : Result := ID_SYSLOG_FACILITY_NNTP;
sfClockDaemonOne : Result := ID_SYSLOG_FACILITY_CLOCK1;
sfUUCP : Result := ID_SYSLOG_FACILITY_UUCP;
sfSecurityTwo : Result := ID_SYSLOG_FACILITY_SECURITY2;
sfFTPDaemon : Result := ID_SYSLOG_FACILITY_FTP;
sfNTP : Result := ID_SYSLOG_FACILITY_NTP;
sfLogAudit : Result := ID_SYSLOG_FACILITY_AUDIT;
sfLogAlert : Result := ID_SYSLOG_FACILITY_ALERT;
sfClockDaemonTwo : Result := ID_SYSLOG_FACILITY_CLOCK2;
sfLocalUseZero : Result := ID_SYSLOG_FACILITY_LOCAL0;
sfLocalUseOne : Result := ID_SYSLOG_FACILITY_LOCAL1;
sfLocalUseTwo : Result := ID_SYSLOG_FACILITY_LOCAL2;
sfLocalUseThree : Result := ID_SYSLOG_FACILITY_LOCAL3;
sfLocalUseFour : Result := ID_SYSLOG_FACILITY_LOCAL4;
sfLocalUseFive : Result := ID_SYSLOG_FACILITY_LOCAL5;
sfLocalUseSix : Result := ID_SYSLOG_FACILITY_LOCAL6;
sfLocalUseSeven : Result := ID_SYSLOG_FACILITY_LOCAL7;
else
Result := ID_SYSLOG_FACILITY_LOCAL7;
end;
end;
function NoToFacility(AFac : Word) : TIdSyslogFacility;
begin
case AFac of
ID_SYSLOG_FACILITY_KERNEL : Result := sfKernel;
ID_SYSLOG_FACILITY_USER : Result := sfUserLevel;
ID_SYSLOG_FACILITY_MAIL : Result := sfMailSystem;
ID_SYSLOG_FACILITY_SYS_DAEMON : Result := sfSystemDaemon;
ID_SYSLOG_FACILITY_SECURITY1 : Result := sfSecurityOne;
ID_SYSLOG_FACILITY_INTERNAL : Result := sfSysLogInternal;
ID_SYSLOG_FACILITY_LPR : Result := sfLPR;
ID_SYSLOG_FACILITY_NNTP : Result := sfNNTP;
ID_SYSLOG_FACILITY_CLOCK1 : Result := sfClockDaemonOne;
ID_SYSLOG_FACILITY_UUCP : Result := sfUUCP;
ID_SYSLOG_FACILITY_SECURITY2 : Result := sfSecurityTwo;
ID_SYSLOG_FACILITY_FTP : Result := sfFTPDaemon;
ID_SYSLOG_FACILITY_NTP : Result := sfNTP;
ID_SYSLOG_FACILITY_AUDIT : Result := sfLogAudit;
ID_SYSLOG_FACILITY_ALERT : Result := sfLogAlert;
ID_SYSLOG_FACILITY_CLOCK2 : Result := sfClockDaemonTwo;
ID_SYSLOG_FACILITY_LOCAL0 : Result := sfLocalUseZero;
ID_SYSLOG_FACILITY_LOCAL1 : Result := sfLocalUseOne;
ID_SYSLOG_FACILITY_LOCAL2 : Result := sfLocalUseTwo;
ID_SYSLOG_FACILITY_LOCAL3 : Result := sfLocalUseThree;
ID_SYSLOG_FACILITY_LOCAL4 : Result := sfLocalUseFour;
ID_SYSLOG_FACILITY_LOCAL5 : Result := sfLocalUseFive;
ID_SYSLOG_FACILITY_LOCAL6 : Result := sfLocalUseSix;
ID_SYSLOG_FACILITY_LOCAL7 : Result := sfLocalUseSeven;
else
Result := sfLocalUseSeven;
end;
end;
function logSeverityToNo(ASev : TIdSyslogSeverity) : Word;
begin
case ASev of
slEmergency : Result := ID_SYSLOG_SEVERITY_EMERGENCY;
slAlert : Result := ID_SYSLOG_SEVERITY_ALERT;
slCritical : Result := ID_SYSLOG_SEVERITY_CRITICAL;
slError : Result := ID_SYSLOG_SEVERITY_ERROR;
slWarning : Result := ID_SYSLOG_SEVERITY_WARNING;
slNotice : Result := ID_SYSLOG_SEVERITY_NOTICE;
slInformational : Result := ID_SYSLOG_SEVERITY_INFORMATIONAL;
slDebug : Result := ID_SYSLOG_SEVERITY_DEBUG;
else
Result := ID_SYSLOG_SEVERITY_DEBUG;
end;
end;
function NoToSeverity(ASev : Word) : TIdSyslogSeverity;
begin
case ASev of
ID_SYSLOG_SEVERITY_EMERGENCY : Result := slEmergency;
ID_SYSLOG_SEVERITY_ALERT : Result := slAlert;
ID_SYSLOG_SEVERITY_CRITICAL : Result := slCritical;
ID_SYSLOG_SEVERITY_ERROR : Result := slError;
ID_SYSLOG_SEVERITY_WARNING : Result := slWarning;
ID_SYSLOG_SEVERITY_NOTICE : Result := slNotice;
ID_SYSLOG_SEVERITY_INFORMATIONAL : Result := slInformational;
ID_SYSLOG_SEVERITY_DEBUG : Result := slDebug;
else
Result := slDebug;
end;
end;
function SeverityToString(ASec: TIdsyslogSeverity): string;
begin
case ASec of
slEmergency: Result := STR_SYSLOG_SEVERITY_EMERGENCY;
slAlert: Result := STR_SYSLOG_SEVERITY_ALERT;
slCritical: Result := STR_SYSLOG_SEVERITY_CRITICAL;
slError: Result := STR_SYSLOG_SEVERITY_ERROR;
slWarning: Result := STR_SYSLOG_SEVERITY_WARNING;
slNotice: Result := STR_SYSLOG_SEVERITY_NOTICE;
slInformational: Result := STR_SYSLOG_SEVERITY_INFORMATIONAL;
slDebug: Result := STR_SYSLOG_SEVERITY_DEBUG;
else
Result := STR_SYSLOG_SEVERITY_UNKNOWN;
end;
end;
function FacilityToString(AFac: TIdSyslogFacility): string;
begin
case AFac of
sfKernel: Result := STR_SYSLOG_FACILITY_KERNEL;
sfUserLevel: Result := STR_SYSLOG_FACILITY_USER;
sfMailSystem: Result := STR_SYSLOG_FACILITY_MAIL;
sfSystemDaemon: Result := STR_SYSLOG_FACILITY_SYS_DAEMON;
sfSecurityOne: Result := STR_SYSLOG_FACILITY_SECURITY1;
sfSysLogInternal: Result := STR_SYSLOG_FACILITY_INTERNAL;
sfLPR: Result := STR_SYSLOG_FACILITY_LPR;
sfNNTP: Result := STR_SYSLOG_FACILITY_NNTP;
sfClockDaemonOne: Result := STR_SYSLOG_FACILITY_CLOCK1;
sfUUCP: Result := STR_SYSLOG_FACILITY_UUCP;
sfSecurityTwo: Result := STR_SYSLOG_FACILITY_SECURITY2;
sfFTPDaemon: Result := STR_SYSLOG_FACILITY_FTP;
sfNTP: Result := STR_SYSLOG_FACILITY_NTP;
sfLogAudit: Result := STR_SYSLOG_FACILITY_AUDIT;
sfLogAlert: Result := STR_SYSLOG_FACILITY_ALERT;
sfClockDaemonTwo: Result := STR_SYSLOG_FACILITY_CLOCK2;
sfLocalUseZero: Result := STR_SYSLOG_FACILITY_LOCAL0;
sfLocalUseOne: Result := STR_SYSLOG_FACILITY_LOCAL1;
sfLocalUseTwo: Result := STR_SYSLOG_FACILITY_LOCAL2;
sfLocalUseThree: Result := STR_SYSLOG_FACILITY_LOCAL3;
sfLocalUseFour: Result := STR_SYSLOG_FACILITY_LOCAL4;
sfLocalUseFive: Result := STR_SYSLOG_FACILITY_LOCAL5;
sfLocalUseSix: Result := STR_SYSLOG_FACILITY_LOCAL6;
sfLocalUseSeven: Result := STR_SYSLOG_FACILITY_LOCAL7;
else
Result := STR_SYSLOG_FACILITY_UNKNOWN;
end;
end;
function ExtractAlphaNumericStr(var VString : String) : String;
var
i, len : Integer;
begin
len := 0;
for i := 1 to IndyMin(Length(VString), 32) do begin
//numbers or alphabet only
if IsAlphaNumeric(VString[i]) then begin
Inc(len);
end else begin
Break;
end;
end;
Result := Copy(VString, 1, len);
VString := Copy(VString, len+1, MaxInt);
end;
{ TIdSysLogMessage }
procedure TIdSysLogMessage.Assign(Source: TPersistent);
var
ms : TIdSysLogMessage;
begin
if Source is TIdSysLogMessage then begin
ms := Source as TIdSysLogMessage;
{Priority and facility properties are set with this so those assignments
are not needed}
Pri := Ms.Pri;
HostName := ms.Hostname;
FMsg.Assign(ms.Msg);
TimeStamp := ms.TimeStamp;
end else begin
inherited Assign(Source);
end;
end;
function TIdSysLogMessage.DecodeTimeStamp(TimeStampString: String): TDateTime;
var
AYear, AMonth, ADay, AHour, AMin, ASec: Word;
LDate : TDateTime;
begin
// SG 25/2/02: Check the ASCII range
CheckASCIIRange(TimeStampString);
// Get the current date to get the current year
LDate := Now;
DecodeDate(LDate, AYear, AMonth, ADay);
if Length(TimeStampString) <> 16 then begin
raise EInvalidSyslogMessage.CreateFmt(RSInvalidSyslogTimeStamp, [TimeStampString]);
end;
// Month
AMonth := StrToMonth(Copy(TimeStampString, 1, 3));
if not AMonth in [1..12] then begin
raise EInvalidSyslogMessage.CreateFmt(RSInvalidSyslogTimeStamp, [TimeStampString]);
end;
// day
ADay := IndyStrToInt(Copy(TimeStampString, 5, 2), 0);
if not (ADay in [1..31]) then begin
raise EInvalidSyslogMessage.CreateFmt(RSInvalidSyslogTimeStamp, [TimeStampString]);
end;
// Time
AHour := IndyStrToInt(Copy(TimeStampString, 8, 2), 0);
if not AHour in [0..23] then begin
raise EInvalidSyslogMessage.CreateFmt(RSInvalidSyslogTimeStamp, [TimeStampString]);
end;
AMin := IndyStrToInt(Copy(TimeStampString, 11, 2), 0);
if not AMin in [0..59] then begin
raise EInvalidSyslogMessage.CreateFmt(RSInvalidSyslogTimeStamp, [TimeStampString]);
end;
ASec := IndyStrToInt(Copy(TimeStampString, 14, 2), 0);
if not ASec in [0..59] then begin
raise EInvalidSyslogMessage.CreateFmt(RSInvalidSyslogTimeStamp, [TimeStampString]);
end;
if TimeStampString[16] <> ' ' then begin {Do not Localize}
Raise EInvalidSyslogMessage.CreateFmt(RSInvalidSyslogTimeStamp, [TimeStampString]);
end;
Result := EncodeDate(AYear, AMonth, ADay) + EncodeTime(AHour, AMin, ASec, 0);
end;
procedure TIdSysLogMessage.ReadFromBytes(const ASrc: TIdBytes; const APeer : String);
const
MSGLEN = 1024;
begin
FPeer := APeer;
RawMessage := BytesToString(ASrc, 0, MSGLEN);
end;
procedure TIdSysLogMessage.Parse;
var
APos: Integer;
begin
APos := 1;
ReadPRI(APos);
ReadHeader(APos);
ReadMSG(APos);
end;
procedure TIdSysLogMessage.ReadHeader(var StartPos: Integer);
var
AHostNameEnd: Integer;
begin
// DateTimeToInternetStr and StrInternetToDateTime
// Time stamp string is 15 char long
try
FTimeStamp := DecodeTimeStamp(Copy(FRawMessage, StartPos, 16));
Inc(StartPos, 16);
// HostName
AHostNameEnd := StartPos;
while (AHostNameEnd < Length(FRawMessage)) and (FRawMessage[AHostNameEnd] <> ' ') do begin {Do not Localize}
Inc(AHostNameEnd);
end; // while
FHostname := Copy(FRawMessage, StartPos, AHostNameEnd - StartPos);
if Pos(':', FHostname) <> 0 then begin // check if the hostname doesn't contain a semicolon (so it's not a process)
FHostname := Peer;
end else begin
StartPos := AHostNameEnd + 1;
end;
// SG 25/2/02: Check the ASCII range of host name
CheckASCIIRange(FHostname);
except
on e: Exception do
begin
FTimeStamp := Now;
FHostname := FPeer;
end;
end;
end;
procedure TIdSysLogMessage.ReadMSG(var StartPos: Integer);
begin
FMessage := Copy(FRawMessage, StartPos, Length(FRawMessage));
Msg.Text := FMessage;
end;
procedure TIdSysLogMessage.ReadPRI(var StartPos: Integer);
var
StartPosSave: Integer;
Buffer: string;
begin
StartPosSave := StartPos;
try
// Read the PRI string
// PRI must start with "less than" sign
Buffer := ''; {Do not Localize}
if not CharEquals(FRawMessage, StartPos, '<') then begin {Do not Localize}
raise EInvalidSyslogMessage.Create(RSInvalidSyslogPRI);
end;
repeat
Inc(StartPos);
if CharEquals(FRawMessage, StartPos, '>') then begin {Do not Localize}
Break;
end;
if not IsNumeric(FRawMessage, 1, StartPos) then begin {Do not Localize}
raise EInvalidSyslogMessage.CreateFmt(RSInvalidSyslogPRINumber, [Buffer]);
end;
Buffer := Buffer + FRawMessage[StartPos];
until StartPos = StartPosSave + 5;
// PRI must end with "greater than" sign
if not CharEquals(FRawMessage, StartPos, '>') then begin {Do not Localize}
raise EInvalidSyslogMessage.Create(RSInvalidSyslogPRI);
end;
// Convert PRI to numerical value
Inc(StartPos);
CheckASCIIRange(Buffer);
PRI := IndyStrToInt(Buffer, -1);
except
// as per RFC, on invalid/missing PRI, use value 13
on e: Exception do
begin
Pri := 13;
// Reset the position to saved value
StartPos := StartPosSave;
end;
end;
end;
procedure TIdSysLogMessage.UpdatePRI;
begin
PRI := logFacilityToNo(Facility) * 8 + logSeverityToNo(Severity);
end;
procedure TIdSysLogMessage.SetFacility(const AValue: TidSyslogFacility);
begin
if FFacility <> AValue then begin
FFacility := AValue;
UpdatePRI;
end;
end;
procedure TIdSysLogMessage.SetHostname(const AValue: string);
begin
if FHostname <> AValue then begin
if Pos(' ', AValue) <> 0 then begin {Do not Localize}
raise EInvalidSyslogMessage.CreateFmt(RSInvalidHostName, [AValue]);
end;
FHostname := AValue;
end;
end;
procedure TIdSysLogMessage.SetSeverity(const AValue: TIdSyslogSeverity);
begin
if FSeverity <> AValue then begin
FSeverity := AValue;
UpdatePRI;
end;
end;
procedure TIdSysLogMessage.SetTimeStamp(const AValue: TDateTime);
begin
FTimeStamp := AValue;
end;
function TIdSysLogMessage.GetHeader: String;
var
AYear, AMonth, ADay, AHour, AMin, ASec, AMSec: Word;
function YearOf(ADate : TDateTime) : Word;
var
mm, dd : Word;
begin
DecodeDate(ADate, Result, mm, dd);
end;
Function DayToStr(day: Word): String;
begin
if Day < 10 then begin
Result := ' ' + IntToStr(day); {Do not Localize}
end else begin
Result := IntToStr(day);
end;
end;
begin
// if the year of the message is not the current year, the timestamp is
// invalid -> Create a new timestamp with the current date/time
if YearOf(Now) <> YearOf(TimeStamp) then
begin
TimeStamp := Now;
end;
DecodeDate(TimeStamp, AYear, AMonth, ADay);
DecodeTime(TimeStamp, AHour, AMin, ASec, AMSec);
Result := IndyFormat('%s %s %.2d:%.2d:%.2d %s', [monthnames[AMonth], DayToStr(ADay), AHour, AMin, ASec, Hostname]); {Do not Localize}
end;
function TIdSysLogMessage.EncodeMessage: String;
begin
// Create a syslog message string
// PRI
Result := IndyFormat('<%d>%s %s', [PRI, GetHeader, FMsg.Text]); {Do not Localize}
// If the message is too long, tuncate it
if Length(result) > 1024 then
begin
result := Copy(result, 1, 1024);
end;
end;
procedure TIdSysLogMessage.SetPri(const Value: TIdSyslogPRI);
begin
if FPri <> Value then begin
if not (Value in [0..191]) then begin
raise EInvalidSyslogMessage.CreateFmt(RSInvalidSyslogPRINumber, [IntToStr(value)]);
end;
FPri := Value;
FFacility := NoToFacility(Value div 8);
FSeverity := NoToSeverity(Value mod 8);
end;
end;
procedure TIdSysLogMessage.InitComponent;
begin
inherited;
PRI := 13; //default
{This stuff is necessary to prevent an AV in the IDE if GStack does not exist}
TIdStack.IncUsage;
try
Hostname := GStack.HostName;
finally
TIdStack.DecUsage;
end;
FMsg := TIdSysLogMsgPart.Create;
end;
procedure TIdSysLogMessage.CheckASCIIRange(var Data: String);
var
i: Integer;
ValidChars : String;
{$IFDEF STRING_IS_IMMUTABLE}
LSB: TIdStringBuilder;
{$ENDIF}
begin
ValidChars := CharRange(#0, #127);
{$IFDEF STRING_IS_IMMUTABLE}
LSB := TIdStringBuilder.Create(Data);
for i := 0 to LSB.Length-1 do // Iterate
begin
if not CharIsInSet(LSB, i, ValidChars) then begin
LSB[i] := '?'; {Do not Localize}
end;
end; // for
Data := LSB.ToString;
{$ELSE}
for i := 1 to Length(Data) do // Iterate
begin
if not CharIsInSet(Data, i, ValidChars) then begin
Data[i] := '?'; {Do not Localize}
end;
end; // for
{$ENDIF}
end;
destructor TIdSysLogMessage.Destroy;
begin
FreeAndNil(FMsg);
inherited Destroy;
end;
procedure TIdSysLogMessage.SetMsg(const AValue: TIdSysLogMsgPart);
begin
FMsg.Assign(AValue);
end;
procedure TIdSysLogMessage.SetRawMessage(const Value: string);
begin
FRawMessage := Value;
// check that message contains only valid ASCII chars.
// Replace Invalid entries by "?"
// SG 25/2/02: Moved to header decoding
Parse;
end;
procedure TIdSysLogMessage.SendToHost(const Dest: String);
var
LEncoding: IIdTextEncoding;
begin
if not Assigned(FUDPCliComp) then begin
FUDPCliComp := TIdUDPClient.Create(Self);
end;
LEncoding := IndyTextEncoding_8Bit;
(FUDPCliComp as TIdUDPClient).Send(Dest, IdPORT_syslog, EncodeMessage, LEncoding{$IFDEF STRING_IS_ANSI}, LEncoding{$ENDIF});
end;
{ TIdSysLogMsgPart }
procedure TIdSysLogMsgPart.Assign(Source: TPersistent);
begin
if Source is TIdSysLogMsgPart then begin
{This sets about everything here}
Text := (Source as TIdSysLogMsgPart).Text;
end else begin
inherited Assign(Source);
end;
end;
procedure TIdSysLogMsgPart.SetPID(AValue: Integer);
begin
FPID := AValue;
FPIDAvailable := FPID <> -1;
end;
procedure TIdSysLogMsgPart.SetProcess(const AValue: String);
var
LTmp: String;
begin
//we have to ensure that the TAG field will never be greater than 32 characters
//and the program name must contain alphanumeric characters
LTmp := AValue;
FProcess := ExtractAlphaNumericStr(LTmp);
end;
function TIdSysLogMsgPart.GetText: String;
begin
Result := Process;
if FPIDAvailable then begin
Result := Result + IndyFormat('[%d]', [FPID]); {Do not Localize}
end;
Result := Result + ': ' + Content; {Do not Localize}
if Result = ': ' then begin {Do not Localize}
Result := '';
end;
end;
procedure TIdSysLogMsgPart.SetText(const AValue: String);
var
SBuf: String;
begin
FProcess := ''; {Do not Localize}
FPID := -1;
FPIDAvailable := False;
FContent := ''; {Do not Localize}
SBuf := AValue;
FProcess := ExtractAlphaNumericStr(SBuf);
if TextStartsWith(SBuf, '[') then begin {Do not Localize}
SBuf := Copy(SBuf, 2, MaxInt);
FPID := IndyStrToInt(Fetch(SBuf, ']'), -1); {Do not Localize}
FPIDAvailable := FPID <> -1;
end;
if TextStartsWith(SBuf, ': ') then begin {Do not Localize}
SBuf := Copy(SBuf, 3, MaxInt);
end
else if TextStartsWith(SBuf, ':') or TextStartsWith(SBuf, ' ') then begin {Do not Localize}
SBuf := Copy(SBuf, 2, MaxInt);
end;
FContent := SBuf;
end;
end.
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