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lazarus/components/turbopower_ipro/iputils.pas

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{******************************************************************}
{* IPUTILS.PAS - Miscellaneous Constants, Types, and Routines *}
{******************************************************************}
(* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is TurboPower Internet Professional
*
* The Initial Developer of the Original Code is
* TurboPower Software
*
* Portions created by the Initial Developer are Copyright (C) 2000-2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* ***** END LICENSE BLOCK ***** *)
{ Global defines potentially affecting this unit }
{$I IPDEFINE.INC}
unit IpUtils;
interface
uses
SysUtils, Classes, Registry,
LCLType, LCLIntf, LMessages, Controls, ComCtrls,
LazFileUtils, LazStringUtils;
const
InternetProfessionalVersion = 1.15;
sShortVersion = 'v%.2f';
IpMsgBase = WM_USER + $0E90;
CM_IPASYNCRESULT = IpMsgBase + 0;
CM_IPSOCKMESSAGE = IpMsgBase + 1;
CM_IPSOCKETSTATUS = IpMsgBase + 2;
CM_IPFREESOCKET = IpMsgBase + 3;
CM_IPLINEMESSAGE = IpMsgBase + 4;
CM_IPTERMDATA = IpMsgBase + 5;
CM_IPTERMRESIZE = IpMsgBase + 6;
CM_IPICMPECHO = IpMsgBase + 7;
CM_IPHTTPGETREQUEST = IpMsgBase + 8;
CM_IPTIMESERVER = IpMsgBase + 9;
CM_IPTIMECLIENT = IpMsgBase + 10;
CM_IPSNTPCLIENT = IpMsgBase + 11;
CM_IPFTPREPLY = IpMsgBase + 12;
CM_IPFTPSTATUS = IpMsgBase + 13;
CM_IPFTPERROR = IpMsgBase + 14;
CM_IPFTPTIMEOUT = IpMsgBase + 15;
CM_IPTERMFORCESIZE = IpMsgBase + 16;
CM_IPTERMSTUFF = IpMsgBase + 17;
CM_IPRASSTATUS = IpMsgBase + 18;
CM_IPFINWHOSERVER = IpMsgBase + 19;
CM_IPUTILITYSERVER = IpMsgBase + 20;
CM_IPSMTPEVENT = IpMsgBase + 21;
CM_IPPOP3EVENT = IpMsgBase + 22;
CM_IPNNTPEVENT = IpMsgBase + 23;
CM_IPHOTINVOKE = IpMsgBase + 24;
type
TIpLineTerminator = (ltNone, ltCR, ltLF, ltCRLF, ltOther);
TIpCRCByteArray = array[0..Pred(High(LongInt))] of Byte;
TIpCharArray = array[0..Pred(High(LongInt))] of AnsiChar;
TIpMD5StateArray = array[0..3] of DWORD;
TIpMD5CountArray = array[0..1] of DWORD;
TIpMD5ByteBuf = array[0..63] of Byte;
TIpMD5LongBuf = array[0..15] of DWORD;
TIpMD5Context = record
State : TIpMD5StateArray;
Count : TIpMD5CountArray;
case Integer of
0 : (ByteBuf : TIpMD5ByteBuf);
1 : (LongBuf : TIpMD5LongBuf);
end;
TIpMD5Digest = array[0..15] of Byte;
EIpBaseException = class(Exception);
EIpAccessException = class(EIpBaseException);
EIpHtmlException = class(EIpBaseException);
TIpBaseAccess = class
private
baPropCS : TCriticalSection;
public
constructor Create; virtual;
destructor Destroy; override;
procedure LockProperties;
procedure UnlockProperties;
end;
TIpBasePersistent = class(TPersistent)
private
bpPropCS : TCriticalSection;
public
constructor Create; virtual;
destructor Destroy; override;
procedure LockProperties;
procedure UnlockProperties;
end;
TIpComponentClass = class of TIpBaseComponent;
TIpBaseComponent = class(TComponent)
protected
function GetVersion : string;
procedure SetVersion(const Value : string);
public
class function GetLogString(const S, D1, D2, D3 : DWORD) : string; virtual;
published
property Version : string
read GetVersion write SetVersion stored False;
end;
TIpBaseWinControl = class(TWinControl)
protected
function GetVersion : string;
procedure SetVersion(const Value : string);
published
property Version : string read GetVersion write SetVersion stored False;
end;
{ Misc utility routines }
function InClassA(Addr : LongInt) : Boolean;
function InClassB(Addr : LongInt) : Boolean;
function InClassC(Addr : LongInt) : Boolean;
function InClassD(Addr : LongInt) : Boolean;
function InMulticast(Addr : LongInt) : Boolean;
function IpCharCount(const Buffer; BufSize : DWORD; C : AnsiChar) : DWORD;
function IpCompStruct(const S1, S2; Size : Cardinal) : Integer;
function IpMaxInt(A, B : Integer) : Integer;
function IpMinInt(A, B : Integer) : Integer;
procedure IpSafeFree(var Obj);
function IpShortVersion : string;
{ CRC routines }
function InternetSumPrim(var Data; DataSize, CurCrc : DWORD) : DWORD;
function InternetSumOfStream(Stream : TStream; CurCrc : DWORD) : DWORD;
function InternetSumOfFile(const FileName : string) : DWORD;
function MD5SumOfFile(const FileName : string) : string;
function MD5SumOfStream(Stream : TStream) : string;
function MD5SumOfStreamDigest(Stream : TStream) : TIpMD5Digest;
function MD5SumOfString(const S : string) : string;
function MD5SumOfStringDigest(const S : string) : TIpMD5Digest;
function SafeYield : LongInt; {-Allow other processes a chance to run}
function AllTrimSpaces(Strng: string) : string;
function CharPos(C: AnsiChar; const S : string): Integer;
function CharPosIdx(C: AnsiChar; const S : string; Idx: Integer): Integer;
function NthCharPos(C: AnsiChar; const S : string; Nth: Integer): Integer;
function RCharPos(C: AnsiChar; const S : string): Integer;
function RCharPosIdx(C: AnsiChar; const S : string; Idx: Integer): Integer;
function RNthCharPos(C: AnsiChar; const S : string; Nth: Integer): Integer;
function RPos(const Substr: string; const S: string): Integer;
function PosIdx(const SubStr, S: string; Idx: Integer): Integer;
{address handling}
type
CharSet = set of AnsiChar;
{ Structure to hold pieces of a URI (Uniform Resource Identifier) }
{ field names are derived from terminology used in: }
{ RFC-2396 "Uniform Resource Identifiers (URI): Generic Syntax" }
TIpAddrRec = record
Scheme : string;
UserName : string;
Password : string;
Authority : string;
Port : string;
Path : string;
Fragment : string;
Query : string;
QueryDelim : AnsiChar;
end;
procedure Initialize(var AddrRec: TIpAddrRec);
procedure Finalize(var AddrRec: TIpAddrRec);
function ExtractEntityName(const NamePath: string): string;
function ExtractEntityPath(const NamePath: string): string;
function IpParseURL(const URL : string; var Rslt : TIpAddrRec) : Boolean;
function BuildURL(const OldURL, NewURL: string): string;
function PutEscapes(const S : string; EscapeSet : CharSet) : string;
function RemoveEscapes(const S : string; EscapeSet : CharSet) : string;
procedure SplitParams(const Parms : string; Dest : TStrings);
function NetToDOSPath(const PathStr : string) : string;
function DOSToNetPath(const PathStr : string) : string;
procedure SplitHttpResponse(const S : string; var V, MsgID, Msg: string);
procedure FieldFix(Fields : TStrings);
function AppendSlash(APath : string) : string;
function RemoveSlash(APath : string) : string;
function GetParentPath(const Path : string) : string;
{ File/Directory Stuff }
function GetLocalContent(const TheFileName: string): string;
function DirExists(Dir : string): Boolean;
function GetTemporaryFile(const Path : string) : string;
function GetTemporaryPath: string;
function AppendBackSlash(APath : string) : string;
function RemoveBackSlash(APath: string) : string;
{ date stuff }
{ convert Net date (as spec'ed in RFC 2616) to Delphi TDateTime }
function INetDateStrToDateTime(const DateStr: string): TDateTime;
{ convert Delphi TDateTime to Net date (as spec'ed in RFC 2616) }
function DateTimeToINetDateTimeStr(DateTime: TDateTime): string;
{ return the current local TimeZone "bias" in minutes from UTC (GMT) }
function TimeZoneBias : Integer;
procedure SplitCookieFields(const Data: string; Fields: TStrings);
implementation
{ misc utility routines }
{ Allow other processes a chance to run }
function SafeYield : LongInt;
begin
SafeYield := 0;
writeln('ToDo: IpUtils.SafeYield');
(*
var
Msg : TMsg;
if PeekMessage(Msg, 0, 0, 0, PM_REMOVE) then begin
if Msg.Message = wm_Quit then
{Re-post quit message so main message loop will terminate}
PostQuitMessage(Msg.WParam)
else begin
TranslateMessage(Msg);
DispatchMessage(Msg);
end;
{Return message so caller can act on message if necessary}
SafeYield := MAKELONG(Msg.Message, Msg.hwnd);
*)
end;
{ Trim leading and trailing spaces from a string }
function AllTrimSpaces(Strng: string) : string;
var
StrStart, StrEnd: Cardinal;
begin
StrEnd := Length(Strng);
if StrEnd = 0 then begin { string is empty }
Result := '';
Exit;
end;
while (StrEnd > 0 ) and (Strng[StrEnd] = ' ') do begin
{ find last non-space character }
Dec(StrEnd);
end;
if StrEnd = 0 then begin { string was all spaces }
Result := '';
Exit;
end;
StrStart := 1;
while (StrStart < StrEnd) and (Strng[StrStart] = ' ') do begin
{ find first non-space character }
Inc(StrStart);
end;
Result := Copy(Strng, StrStart, StrEnd - StrStart + 1);
end;
{ Find leftmost occurrence of character C in string S }
{* If C not found returns 0 }
function CharPos(C: AnsiChar; const S : string): Integer;
var
i : Integer;
begin
for i := 1 to length(S) do
if (S[i] = C) then begin
Result := i;
Exit;
end;
Result := 0;
end;
{ Find leftmost occurrence of character C in string S past location Idx }
{ * If C not found returns 0 }
function CharPosIdx(C: AnsiChar; const S : string; Idx: Integer): Integer;
var
Len : Integer;
begin
Len := Length(S);
if (Idx > Len) or (Idx < 1) then begin
Result := 0;
Exit;
end;
Result := Idx;
while (Result <= Len) and (S[Result] <> C) do
Inc(Result);
if Result > Len then
Result := 0;
end;
{ Find Nth occurrence of character C in string S }
{ * If C not found returns 0 }
function NthCharPos(C: AnsiChar; const S : string; Nth: Integer): Integer;
var
Len, CharCt : Integer;
begin
if Nth <= 0 then begin
Result := 0;
Exit;
end;
Len := Length(S);
CharCt := 0;
Result := 1;
while (Result <= Len) and (CharCt < Nth) do begin
if S[Result] = C then
Inc(CharCt);
if CharCt < Nth then
Inc(Result);
end;
if Result > Len then
Result := 0;
end;
{ Find rightmost occurrence of character C in string S }
{ * If C not found returns 0 }
function RCharPos(C: AnsiChar; const S : string): Integer;
begin
Result := Length(S);
while (Result > 0) and (S[Result] <> C) do
Dec(Result);
if (Result < 0) then
Result := 0;
end;
{ Find rightmost occurrence of character C in string S prior to location Idx }
{ * If C not found returns 0 }
function RCharPosIdx(C: AnsiChar; const S : string; Idx: Integer): Integer;
begin
Result := Length(S);
if (Idx > Result) or (Idx < 1) then begin
Result := 0;
Exit;
end;
Result := Idx;
while (Result > 0) and (S[Result] <> C) do
Dec(Result);
if (Result < 0) then
Result := 0;
end;
{ Find Nth from the rightmost occurrence of character C in string S }
{ * If C not found returns 0 }
function RNthCharPos(C: AnsiChar; const S : string; Nth: Integer): Integer;
var
CharCt : Integer;
begin
if Nth <= 0 then begin
Result := 0;
Exit;
end;
CharCt := 0;
Result := Length(S);
while (Result > 0) and (CharCt < Nth) do begin
if S[Result] = C then
Inc(CharCt);
if CharCt < Nth then
Dec(Result);
end;
if (Result < 0) then
Result := 0;
end;
{ Complement to RTL Pos() function, finds RIGHTmost }
{ instance of a substring (SubStr) within a string (S) }
{ * If Substr not found returns 0 }
function RPos(const Substr: string; const S: string): Integer;
var
SL, i : Integer;
begin
SL := Length(Substr);
i := Length(S);
if (Substr = '') or (S = '') or (SL > i) then begin
Result := 0;
Exit;
end;
while i >= SL do begin
if S[i] = Substr[SL] then begin
if Copy(S, i - SL + 1, SL) = Substr then begin
Result := i - SL + 1;
Exit;
end;
end;
Dec(i);
end;
Result := i;
end;
{ Find location of first occurrence of a substring (SubStr) in a string (S) }
{ past a particular index (Idx) }
{ * Result is relative to the start of the entire original string }
{ * Returns 0 if substring not found }
function PosIdx(const SubStr, S: string; Idx: Integer): Integer;
var
Temp : string;
begin
Temp := Copy(S, Idx, Length(S) - Idx - 1);
Result := Pos(SubStr, Temp);
if Result > 0 then
Result := Result + (Idx - 1);
end;
procedure Initialize(var AddrRec: TIpAddrRec);
begin
AddrRec.QueryDelim:=#0;
end;
procedure Finalize(var AddrRec: TIpAddrRec);
begin
with AddrRec do begin
Scheme :='';
UserName :='';
Password :='';
Authority :='';
Port :='';
Path :='';
Fragment :='';
Query :='';
end;
end;
const
CrcBufSize = 2048;
CrcFileMode = fmOpenRead or fmShareDenyWrite;
{ Returns True if a given address is a Class A address }
function InClassA(Addr : LongInt) : Boolean;
begin
Result := (Addr and $80000000) = 0;
end;
{ Returns True if a given address is a Class B address }
function InClassB(Addr : LongInt) : Boolean;
begin
Result := (Cardinal(Addr) and $C0000000) = $80000000;
end;
{ Returns True if a given address is a Class C address }
function InClassC(Addr : LongInt) : Boolean;
begin
Result := (Cardinal(Addr) and $E0000000) = $C0000000;
end;
{ Returns True if a given address is a Class D address }
function InClassD(Addr : LongInt) : Boolean;
begin
Result := (Cardinal(Addr) and $F0000000) = $E0000000;
end;
{ Returns True if a given address is a multicast address }
function InMulticast(Addr : LongInt) : Boolean;
begin
Result := InClassD(Addr);
end;
{ Calculates the Internet Checksum of a block }
function InternetSumPrim(var Data; DataSize, CurCrc : DWORD) : DWORD;
var
I : Integer;
begin
Result := CurCrc;
if DataSize = 0 then Exit;
for I := 0 to (DataSize - 1) do begin
if Odd(I) then
Result := Result + (cardinal(TIpCRCByteArray(Data)[I]) shl 8)
else
Result := Result + TIpCRCByteArray(Data)[I];
end;
Result := (not((Result and $FFFF) + (Result shr 16))) and $FFFF;
end;
{ Calculates the Internet Checksum of a stream }
function InternetSumOfStream(Stream : TStream; CurCrc : DWORD) : DWORD;
var
BufArray : array[0..(CrcBufSize-1)] of Byte;
Res : LongInt;
begin
{Initialize Crc}
Result := CurCrc;
repeat
Res := Stream.Read(BufArray, CrcBufSize);
Result := InternetSumPrim(BufArray, Res, Result);
until (Res <> CrcBufSize);
end;
{ Calculates the Internet Checksum of a file }
function InternetSumOfFile(const FileName : string) : DWORD;
var
FileSt : TFileStream;
begin
FileSt := TFileStream.Create(FileName, CrcFileMode);
try
Result := InternetSumOfStream(FileSt, 0);
finally
FileSt.Free;
end;
end;
{ Initialize the MD5 context record }
procedure MD5Init(var Context : TIpMD5Context);
begin
{ Zero out context }
FillChar(Context, SizeOf(TIpMD5Context), #0);
{ Load magic initialization constants }
Context.State[0] := DWORD($67452301);
Context.State[1] := DWORD($efcdab89);
Context.State[2] := DWORD($98badcfe);
Context.State[3] := DWORD($10325476);
end;
{ MD5 Basic Transformation -- Transforms State based on Buf }
procedure MD5Transform(var State : TIpMD5StateArray; const Buf : TIpMD5LongBuf);
const
S11 = 7; S12 = 12; S13 = 17; S14 = 22; S21 = 5; S22 = 9; S23 = 14;
S24 = 20; S31 = 4; S32 = 11; S33 = 16; S34 = 23; S41 = 6; S42 = 10;
S43 = 15; S44 = 21;
var
a, b, c, d : DWORD;
{ Round 1 processing }
procedure FF(var W : DWORD; X, Y, Z : DWORD; S : Byte; Data : DWORD);
begin
Inc(W, (Z xor (X and (Y xor Z))) + Data);
W := (W shl S) or (W shr (32 - S));
Inc(W, X);
end;
{ Round 2 processing }
procedure GG(var W : DWORD; X, Y, Z : DWORD; S : Byte; Data : DWORD);
begin
Inc(W, (Y xor (Z and (X xor Y))) + Data);
W := (W shl S) or (W shr (32 - S));
Inc(W, X);
end;
{ Round 3 processing }
procedure HH(var W : DWORD; X, Y, Z : DWORD; S : Byte; Data : DWORD);
begin
Inc(W, (X xor Y xor Z) + Data);
W := (W shl S) or (W shr (32 - S));
Inc(W, X);
end;
{ Round 4 processing }
procedure II(var W : DWORD; X, Y, Z : DWORD; S : Byte; Data : DWORD);
begin
Inc(W, (Y xor (X or not Z)) + Data);
W := (W shl S) or (W shr (32 - S));
Inc(W, X);
end;
begin
a := State[0];
b := State[1];
c := State[2];
d := State[3];
{ Round 1 }
FF(a, b, c, d, S11, Buf[ 0] + DWORD($d76aa478)); { 1 }
FF(d, a, b, c, S12, Buf[ 1] + DWORD($e8c7b756)); { 2 }
FF(c, d, a, b, S13, Buf[ 2] + DWORD($242070db)); { 3 }
FF(b, c, d, a, S14, Buf[ 3] + DWORD($c1bdceee)); { 4 }
FF(a, b, c, d, S11, Buf[ 4] + DWORD($f57c0faf)); { 5 }
FF(d, a, b, c, S12, Buf[ 5] + DWORD($4787c62a)); { 6 }
FF(c, d, a, b, S13, Buf[ 6] + DWORD($a8304613)); { 7 }
FF(b, c, d, a, S14, Buf[ 7] + DWORD($fd469501)); { 8 }
FF(a, b, c, d, S11, Buf[ 8] + DWORD($698098d8)); { 9 }
FF(d, a, b, c, S12, Buf[ 9] + DWORD($8b44f7af)); { 10 }
FF(c, d, a, b, S13, Buf[10] + DWORD($ffff5bb1)); { 11 }
FF(b, c, d, a, S14, Buf[11] + DWORD($895cd7be)); { 12 }
FF(a, b, c, d, S11, Buf[12] + DWORD($6b901122)); { 13 }
FF(d, a, b, c, S12, Buf[13] + DWORD($fd987193)); { 14 }
FF(c, d, a, b, S13, Buf[14] + DWORD($a679438e)); { 15 }
FF(b, c, d, a, S14, Buf[15] + DWORD($49b40821)); { 16 }
{ Round 2 }
GG(a, b, c, d, S21, Buf[ 1] + DWORD($f61e2562)); { 17 }
GG(d, a, b, c, S22, Buf[ 6] + DWORD($c040b340)); { 18 }
GG(c, d, a, b, S23, Buf[11] + DWORD($265e5a51)); { 19 }
GG(b, c, d, a, S24, Buf[ 0] + DWORD($e9b6c7aa)); { 20 }
GG(a, b, c, d, S21, Buf[ 5] + DWORD($d62f105d)); { 21 }
GG(d, a, b, c, S22, Buf[10] + DWORD($02441453)); { 22 }
GG(c, d, a, b, S23, Buf[15] + DWORD($d8a1e681)); { 23 }
GG(b, c, d, a, S24, Buf[ 4] + DWORD($e7d3fbc8)); { 24 }
GG(a, b, c, d, S21, Buf[ 9] + DWORD($21e1cde6)); { 25 }
GG(d, a, b, c, S22, Buf[14] + DWORD($c33707d6)); { 26 }
GG(c, d, a, b, S23, Buf[ 3] + DWORD($f4d50d87)); { 27 }
GG(b, c, d, a, S24, Buf[ 8] + DWORD($455a14ed)); { 28 }
GG(a, b, c, d, S21, Buf[13] + DWORD($a9e3e905)); { 29 }
GG(d, a, b, c, S22, Buf[ 2] + DWORD($fcefa3f8)); { 30 }
GG(c, d, a, b, S23, Buf[ 7] + DWORD($676f02d9)); { 31 }
GG(b, c, d, a, S24, Buf[12] + DWORD($8d2a4c8a)); { 32 }
{ Round 3 }
HH(a, b, c, d, S31, Buf[ 5] + DWORD($fffa3942)); { 33 }
HH(d, a, b, c, S32, Buf[ 8] + DWORD($8771f681)); { 34 }
HH(c, d, a, b, S33, Buf[11] + DWORD($6d9d6122)); { 35 }
HH(b, c, d, a, S34, Buf[14] + DWORD($fde5380c)); { 36 }
HH(a, b, c, d, S31, Buf[ 1] + DWORD($a4beea44)); { 37 }
HH(d, a, b, c, S32, Buf[ 4] + DWORD($4bdecfa9)); { 38 }
HH(c, d, a, b, S33, Buf[ 7] + DWORD($f6bb4b60)); { 39 }
HH(b, c, d, a, S34, Buf[10] + DWORD($bebfbc70)); { 40 }
HH(a, b, c, d, S31, Buf[13] + DWORD($289b7ec6)); { 41 }
HH(d, a, b, c, S32, Buf[ 0] + DWORD($eaa127fa)); { 42 }
HH(c, d, a, b, S33, Buf[ 3] + DWORD($d4ef3085)); { 43 }
HH(b, c, d, a, S34, Buf[ 6] + DWORD($04881d05)); { 44 }
HH(a, b, c, d, S31, Buf[ 9] + DWORD($d9d4d039)); { 45 }
HH(d, a, b, c, S32, Buf[12] + DWORD($e6db99e5)); { 46 }
HH(c, d, a, b, S33, Buf[15] + DWORD($1fa27cf8)); { 47 }
HH(b, c, d, a, S34, Buf[ 2] + DWORD($c4ac5665)); { 48 }
{ Round 4 }
II(a, b, c, d, S41, Buf[ 0] + DWORD($f4292244)); { 49 }
II(d, a, b, c, S42, Buf[ 7] + DWORD($432aff97)); { 50 }
II(c, d, a, b, S43, Buf[14] + DWORD($ab9423a7)); { 51 }
II(b, c, d, a, S44, Buf[ 5] + DWORD($fc93a039)); { 52 }
II(a, b, c, d, S41, Buf[12] + DWORD($655b59c3)); { 53 }
II(d, a, b, c, S42, Buf[ 3] + DWORD($8f0ccc92)); { 54 }
II(c, d, a, b, S43, Buf[10] + DWORD($ffeff47d)); { 55 }
II(b, c, d, a, S44, Buf[ 1] + DWORD($85845dd1)); { 56 }
II(a, b, c, d, S41, Buf[ 8] + DWORD($6fa87e4f)); { 57 }
II(d, a, b, c, S42, Buf[15] + DWORD($fe2ce6e0)); { 58 }
II(c, d, a, b, S43, Buf[ 6] + DWORD($a3014314)); { 59 }
II(b, c, d, a, S44, Buf[13] + DWORD($4e0811a1)); { 60 }
II(a, b, c, d, S41, Buf[ 4] + DWORD($f7537e82)); { 61 }
II(d, a, b, c, S42, Buf[11] + DWORD($bd3af235)); { 62 }
II(c, d, a, b, S43, Buf[ 2] + DWORD($2ad7d2bb)); { 63 }
II(b, c, d, a, S44, Buf[ 9] + DWORD($eb86d391)); { 64 }
Inc(State[0], a);
Inc(State[1], b);
Inc(State[2], c);
Inc(State[3], d);
end;
{ MD5 finalization. Ends an MD5 message-digest operation, }
{ writing the message digest and zeroing the context. }
procedure MD5Final(var Digest : TIpMD5Digest; var Context : TIpMD5Context);
var
I : Integer;
P : Byte;
begin
I := (Context.Count[0] shr 3) and $3F;
Context.ByteBuf[I] := $80;
P := Succ(I);
I := Pred(64)-I;
{ Pad appropriately }
if I < 8 then begin
FillChar(Context.ByteBuf[P], I, #0);
MD5Transform(Context.State, Context.LongBuf);
FillChar(Context.ByteBuf, 56, #0);
end else begin
FillChar(Context.ByteBuf[P], I-8, #0);
end;
{ Set count in context }
Context.LongBuf[14] := Context.Count[0];
Context.LongBuf[15] := Context.Count[1];
MD5Transform(Context.State, Context.LongBuf);
Move(Context.State, Digest, 16);
{ Zero out Context }
FillChar(Context, SizeOf(TIpMD5Context), #0);
end;
{ Calculates the MD5 Digest of a block -- RFC 1321 }
procedure MD5SumPrim(const Data; DataSize : DWORD; var Context : TIpMD5Context);
var
I, J : DWORD;
begin
J := Context.Count[0];
Inc(Context.Count[0], DWORD(DataSize) shl 3);
if Context.Count[0] < J then
Inc(Context.Count[1]);
Inc(Context.Count[1], DataSize shr 29);
J := (J shr 3) and $3F;
if J <> 0 then begin
I := J;
J := 64 - J;
if DataSize < J then begin
Move(Data, Context.ByteBuf[I], DataSize);
Exit;
end;
Move(Data, Context.ByteBuf[I], J);
MD5Transform(Context.State, Context.LongBuf);
Dec(DataSize, J);
end;
I := J;
while DataSize >= 64 do begin
Move(TByteArray(Data)[I], Context.ByteBuf, 64);
MD5Transform(Context.State, Context.LongBuf);
Inc(I, 64);
Dec(DataSize, 64);
end;
Move(TByteArray(Data)[I], Context.ByteBuf, DataSize);
end;
{ Calculates the MD5 Digest of a file }
function MD5SumOfFile(const FileName : string) : string;
var
FileSt : TFileStream;
begin
FileSt := TFileStream.Create(FileName, CrcFileMode);
try
Result := MD5SumOfStream(FileSt);
finally
FileSt.Free;
end;
end;
{ Return hex string representing MD5 digest }
function HexDigest(Digest : TIpMD5Digest) : string;
const
HexDigits : array[0..$F] of AnsiChar = '0123456789abcdef';
var
I : Integer;
begin
SetLength(Result, 32);
{ Generate output string }
for I := 0 to 15 do begin
Result[(I shl 1) + 1] := HexDigits[Digest[I] shr 4];
Result[(I shl 1) + 2] := HexDigits[Digest[I] and $F];
end;
end;
{ Calculates the MD5 Digest of a stream }
function MD5SumOfStream(Stream : TStream) : string;
begin
Result := HexDigest(MD5SumOfStreamDigest(Stream));
end;
{ Calculates the MD5 Digest of a stream }
function MD5SumOfStreamDigest(Stream : TStream) : TIpMD5Digest;
var
BufArray : array[0..(CrcBufSize-1)] of Byte;
Context : TIpMD5Context;
I, Res : Integer;
begin
{ Init Digest }
for I := 0 to 15 do
Byte(Result[I]) := Succ(I);
{ Init Context }
MD5Init(Context);
repeat
Res := Stream.Read(BufArray, CrcBufSize);
MD5SumPrim(BufArray, Res, Context);
until (Res <> CrcBufSize);
{ Finalize }
MD5Final(Result, Context);
end;
{ Calculates the MD5 Digest of a string }
function MD5SumOfString(const S : string) : string;
var
Context : TIpMD5Context;
Digest : TIpMD5Digest;
I : Byte;
begin
Result := '';
{ Init Digest }
for I := 0 to 15 do
Digest[I] := Succ(I);
{ Init Context }
MD5Init(Context);
MD5SumPrim(S[1], Length(S), Context);
{ Finalize }
MD5Final(Digest, Context);
{ Generate output string }
Result := HexDigest(Digest);
end;
{ Calculates the MD5 Digest of a string }
function MD5SumOfStringDigest(const S : string) : TIpMD5Digest;
var
Context : TIpMD5Context;
I : Byte;
begin
{ Init Digest }
for I := 0 to 15 do
Result[I] := Succ(I);
{ Init Context }
MD5Init(Context);
MD5SumPrim(S[1], Length(S), Context);
{ Finalize }
MD5Final(Result, Context);
end;
{ Compares two fixed size structures }
function IpCompStruct(const S1, S2; Size : Cardinal) : Integer;
{$IFDEF CPUI386}
asm
push edi
push esi
mov esi, eax
mov edi, edx
xor eax, eax
or ecx, ecx
jz @@CSDone
repe cmpsb
je @@CSDone
inc eax
ja @@CSDone
or eax, -1
@@CSDone:
pop esi
pop edi
end;
{$ELSE}
begin
Result := CompareMemRange(@S1, @S2, Size);
end;
{$ENDIF}
function IpCharCount(const Buffer; BufSize : DWORD; C : AnsiChar) : DWORD;
register;
{$IFDEF CPUI386}
asm
push ebx
xor ebx, ebx
or edx, edx
jz @@Done
jmp @@5
@@Loop:
cmp cl, [eax+3]
jne @@1
inc ebx
@@1:
cmp cl, [eax+2]
jne @@2
inc ebx
@@2:
cmp cl, [eax+1]
jne @@3
inc ebx
@@3:
cmp cl, [eax+0]
jne @@4
inc ebx
@@4:
add eax, 4
sub edx, 4
@@5:
cmp edx, 4
jge @@Loop
cmp edx, 3
je @@1
cmp edx, 2
je @@2
cmp edx, 1
je @@3
@@Done:
mov eax, ebx
pop ebx
end;
{$ELSE}
var
X: Integer;
begin
Result := 0;
for X := 0 to Bufsize-1 do begin
if PChar(@Buffer)[X] = C then Inc(Result);
end;
end;
{$ENDIF}
function IpMaxInt(A, B : Integer) : Integer;
begin
if A >= B then
Result := A
else
Result := B;
end;
function IpMinInt(A, B : Integer) : Integer;
begin
if A <= B then
Result := A
else
Result := B;
end;
{ Thread safe object free }
procedure IpSafeFree(var Obj);
var
P : TObject;
begin
P := TObject(Obj);
{ Clear reference }
TObject(Obj) := nil;
{ Destroy object }
P.Free;
end;
{ Return short version string }
function IpShortVersion : string;
begin
Result := Format(sShortVersion, [InternetProfessionalVersion]);
end;
{ TIpBaseAccess }
{ Create instance of TIpBaseAccess }
constructor TIpBaseAccess.Create;
begin
inherited;
InitializeCriticalSection(baPropCS);
end;
{ Destroy instance of TIpBaseAccess }
destructor TIpBaseAccess.Destroy;
begin
DeleteCriticalSection(baPropCS);
inherited;
end;
{ Enters TIpBaseAccess critical section }
procedure TIpBaseAccess.LockProperties;
begin
if IsMultiThread then
EnterCriticalSection(baPropCS);
end;
{ Leaves TIpBaseAccess critical section }
procedure TIpBaseAccess.UnlockProperties;
begin
if IsMultiThread then
LeaveCriticalSection(baPropCS);
end;
{ TIpBasePersistent }
{ Create instance of TIpBasePersistent }
constructor TIpBasePersistent.Create;
begin
inherited;
InitializeCriticalSection(bpPropCS);
end;
{ Destroy instance of TIpBasePersistent }
destructor TIpBasePersistent.Destroy;
begin
DeleteCriticalSection(bpPropCS);
inherited;
end;
{ Enters TIpBasePersistent critical section }
procedure TIpBasePersistent.LockProperties;
begin
if IsMultiThread then
EnterCriticalSection(bpPropCS);
end;
{ Leaves TIpBasePersistent critical section }
procedure TIpBasePersistent.UnlockProperties;
begin
if IsMultiThread then
LeaveCriticalSection(bpPropCS);
end;
{ TIpBaseComponent }
function TIpBaseComponent.GetVersion: string;
begin
Result := IpShortVersion;
end;
{ Returns an appropriate string for the given parameters }
class function TIpBaseComponent.GetLogString(const S, D1, D2, D3: DWORD): string;
begin
if (S=0) or (D1=0) or (D2=0) or (D3=0) then
; // avoid hints
Result := '!!!! Unhandled log entry'#10#13;
end;
procedure TIpBaseComponent.SetVersion(const Value: string);
begin
if (Value='') then ; // avoid hints
{ Intentionally empty }
end;
{ TIpBaseWinControl }
function TIpBaseWinControl.GetVersion : string;
begin
Result := IpShortVersion;
end;
procedure TIpBaseWinControl.SetVersion(const Value : string);
begin
if (Value='') then ; // avoid hints
{ Intentionally empty }
end;
{ address handling }
{ Apply Internet escaping (%nn) to characters in EscapeSet found in S }
function PutEscapes(const S : string; EscapeSet : CharSet) : string;
var
Temp, Rep : string;
i : Integer;
begin
Temp := S;
i := 1;
while i <= Length(Temp) do begin
if Temp[i] in EscapeSet then begin
{ Internet escapes of the form %nn where }
{ n is the ASCII character number in Hex }
Rep := '%' + Format('%2x', [Ord(Temp[i])]);
Delete(Temp, i, 1);
Insert(Rep, Temp, i);
Inc(i, 3);
end
else
Inc(i);
end;
Result := Temp;
end;
{ Convert Internet escapes to ASCII equivalents }
function RemoveEscapes(const S : string; EscapeSet : CharSet) : string;
var
Temp, Start, EscStr : string;
P : Integer;
C : AnsiChar;
begin
Temp := S;
Start := '';
P := CharPos('%', Temp);
while P > 0 do begin
Start := Start + Copy(Temp, 1, P-1);
EscStr := Copy(Temp, P + 1, 2);
C := Chr(StrToInt('$' + EscStr));
if C in EscapeSet then begin
Start := Start + C;
end
else begin
Start := Start + EscStr;
end;
Temp := Copy(Temp, P + 3, Length(Temp) - 3);
P := CharPos('%', Temp);
end;
Result := Start + Temp;
end;
{ Convert Internet file characters to DOS }
{ * maps '|' -> ':' }
{ '/' -> '\' }
function NetToDOSPath(const PathStr : string) : string;
var
i : Integer;
begin
Result := PathStr;
for i := 1 to Length(Result) do begin
case Result[i] of
'|': Result[i] := ':';
'/': Result[i] := DirectorySeparator;
else
{ leave it alone };
end;
end;
if (CharPos('\', Result) = 1) and (CharPos(':', Result) > 0) then
Result := Copy(Result, 2, Length(Result) - 1);
end;
function DOSToNetPath(const PathStr : string) : string;
{ Convert DOS file characters to Internet }
{ * maps ':' -> '|' }
{ '\' -> '/' }
var
i : Integer;
begin
Result := PathStr;
for i := 1 to Length(Result) do begin
case Result[i] of
':': Result[i] := '|';
DirectorySeparator: Result[i] := '/';
else
{ leave it alone };
end;
end;
end;
function IpParseURL(const URL : string; var Rslt : TIpAddrRec) : Boolean;
{ Splits URL into components }
{ -- rewritten
- Parsing UserName and Password fields out of Mailto: urls of the form:
mailto:user:pass@myserver.net
- Username and Password fields added to TIpAddrRec in support of
additional IpParseUrl capabilities
- Handling URL Fragments and Queries on local files
- Improved recognition of relative paths
- Improved recognition of "LocalHost" style Authorities
}
{
Algorithm:
1. Leading spaces ignored
2. Start of string:
- Any starting alphabetic character is accumulated into a "Potential
Authority" (PA) string
- If the first character is a digit URL is assumed to be starting with a
numeric format IP address
- If the first character is a period ('.') or a slash ('/', '\') the URL is
considered to be a relative path
4. If a PA has been started:
- alphanumeric characters are accumulated into the PA
- if a ':' or '|' are encountered and there is only one character in
the preceding PA, the PA is assumed to be a drive letter for a local
file and the rest of the URL is handled accordingly
- if there is more than one character in the PA when the ':' is encountered,
and if the PA contains at least one period ('.') it is assumed to be an
authority, otherwise it is assumed to be a scheme (e.g. HTTP), the ':' is
assumed to be delimiting between an authority and a port ID and the PA
string is handled accordingly
- if a '.' is encountered prior to seeing a '/' then the PA is assumed to be
an authority.
- if a '/' is encountered, the PA is assumed to be an authority
- if a '@' is encountered the present PA is assumed to be a username, and
PA accumulation is re-started
- any other non-specified character is assumed to indicate an Authority
5. If a character indicating the end of the PA has been encountered:
- if numeric characters are seen after a ':' these are assumed to be a port ID
- if alphabetic characters are seen they are assumed to be part of a password
- if a slash is encountered the PA is assumed to be a scheme
- if an '@' or ':' is encountered the PA is assumed to be a UserName.
On '@' the assumption is the Authority is starting.
On ':' the assumption is a password is starting.
6. Slashes following a scheme:
- all forward slashes (if any) following a scheme are ignored
- if a '.' or '\' is found immediately after the scheme slashes, it's assumed
to indicate the start of a local relative path
7. Password accumulation:
- non-'@' characters are considered part of the password
- if an '@' is encountered it's considered the start of the authority and
actual authority accumulatino is started
8. Authority Accumulation:
- characters in the set ['A'..'Z', 'a'..'z', '0'..'9', '.', '-', '_'] are
accumulated into the authority
- a ':' is assumed to indicate the end of the authority and the start of a
Port ID
- a '/' is assumed to indicate the end of the authority and the start of a
path
- a space (' ') is assumed to indicate trailing spaces on the URL
9. Port has started:
- numeric characters are accumulated into the Port
- a '/' is assumed to indicate the start of a path
- a ' ' is assumed to indicate trailing spaces on the url
10. Path has started:
- characters not in the set ['#', '?', '&'] are accumulated into the Path
- a '#' is assumed to indicate the start of a Fragment
- a '?' or '&' is assumed to indicate the start of a Query
11. Fragment has started:
- characters not in the set ['?', '&', ' '] are accumulated into the Fragment
- a '?' or '&' is assumed to indicate the start of a Query
- a ' ' is assumed to indicate trailing spaces on the url
12. Query has started:
- non space characters are accumulated into the Fragment
- a ' ' is assumed to indicate trailing spaces on the url
13. Trailing spaces
- ignored
}
type
TUrlParseState = (
psStart, psError, psStartSp, psPotAuth, psEoPotAuth, psSchemeSlashes,
psLocalPath, psAuthority, psUserName, psPassword, psPort, psPath,
psFragment, psQuery, psEndSp
);
const
UrlStops : set of TUrlParseState = [psPath, psLocalPath, psAuthority, psPort,
psFragment, psQuery, psEndSp];
var
P : PChar;
i : Integer;
State : TUrlParseState;
PotAuth, PotPath : string;
SchemeSeen: Boolean;
SlashCount: integer;
procedure ProcessChar;
begin
case State of
psStart: begin
case P^ of
' ': begin
State := psStartSp;
end;
'A'..'Z', 'a'..'z': begin
PotAuth := PotAuth + P^;
State := psPotAuth;
end;
'0'..'9': begin
Rslt.Authority := Rslt.Authority + P^;
State := psAuthority;
end;
'.', '/', '\' : begin
PotPath := PotPath + P^;
State := psPath;
end;
else
State := psError;
end;
end;
psStartSp: begin
case P^ of
' ': { ignore };
'A'..'Z', 'a'..'z', '-', '_': begin
PotAuth := PotAuth + P^;
State := psPotAuth;
end;
'0'..'9': begin
Rslt.Authority := Rslt.Authority + P^;
State := psAuthority;
end;
'.', '/', '\' : begin
PotPath := PotPath + P^;
State := psPath;
end;
else
State := psError;
end;
end;
psPotAuth: begin
case P^ of
'A'..'Z', 'a'..'z', '0'..'9', '.', '-', '_': begin
PotAuth := PotAuth + P^;
end;
':', '|': begin
if Length(PotAuth) = 1 then begin
PotPath := PotAuth + P^;
PotAuth := '';
State := psLocalPath;
end
else begin
if Pos('.', PotAuth) > 0 then begin
Rslt.Authority := PotAuth;
State := psPort;
end
else
if (Rslt.Scheme = '') then begin
Rslt.Scheme := PotAuth;
SchemeSeen := True;
PotAuth := '';
State := psSchemeSlashes;
SlashCount := 0;
end
else begin
State := psEoPotAuth;
end;
end;
end;
'/', '\': begin
if SchemeSeen then
Rslt.Authority := PotAuth
else begin
if Pos('.', PotAuth) > 0 then
Rslt.Authority := PotAuth
else
PotPath := PotAuth;
end;
PotAuth := '';
PotPath := PotPath + P^;
State := psPath;
end;
'@': begin
Rslt.UserName := PotAuth;
PotAuth := '';
State := psAuthority;
end;
else begin
Rslt.Authority := PotAuth;
PotAuth := '';
State := psAuthority;
end;
end;
end;
psEoPotAuth: begin
case P^ of
'0'..'9': begin
Rslt.Authority := PotAuth;
PotAuth := '';
Rslt.Port := Rslt.Port + P^;
State := psPort;
end;
'/', '\': begin
Rslt.Scheme := PotAuth;
SchemeSeen := True;
PotAuth := '';
State := psSchemeSlashes;
SlashCount := 0;
end;
'A'..'Z', 'a'..'z': begin
Rslt.UserName := PotAuth;
PotAuth := '';
Rslt.Password := Rslt.Password + P^;
State := psPassword;
end;
'@': begin
Rslt.UserName := PotAuth;
PotAuth := '';
State := psAuthority;
end;
':': begin
Rslt.UserName := PotAuth;
PotAuth := '';
State := psPassword;
end;
end;
end;
psSchemeSlashes: begin
inc(SlashCount);
if (p^ <> '/') or (SlashCount > 2) then
case P^ of
'.', '\','/': begin { start of a local path }
PotPath := PotPath + P^;
State := psLocalPath;
end;
else begin
if CharPos('@', URL) > 0 then begin
PotAuth := P^;
State := psUserName;
end
else begin
PotAuth := P^;
State := psPotAuth;
end;
end;
end;
end;
psLocalPath: begin
case P^ of
'#': begin
if PotPath <> '' then
Rslt.Path := AllTrimSpaces(PotPath);
State := psFragment;
end;
'?', '&': begin
if PotPath <> '' then
Rslt.Path := AllTrimSpaces(PotPath);
Rslt.QueryDelim := P^;
State := psQuery;
end;
else
PotPath := PotPath + P^;
end;
end;
psAuthority: begin
case P^ of
'A'..'Z', 'a'..'z', '0'..'9', '.', '-', '_' : begin
Rslt.Authority := Rslt.Authority + P^;
end;
':': begin
State := psPort;
end;
' ': begin
State := psEndSp;
end;
'/', '\': begin
PotPath := PotPath + P^;
State := psPath;
end;
end;
end;
psUserName: begin
case P^ of
'@': begin
Rslt.UserName := PotAuth;
PotAuth := '';
State := psAuthority;
end;
':', '|': begin
if Length(PotAuth) = 1 then begin
PotPath := PotAuth + P^;
PotAuth := '';
State := psLocalPath;
end
else begin
Rslt.UserName := PotAuth;
PotAuth := '';
State := psPassword;
end;
end;
else
PotAuth := PotAuth + P^;
end;
end;
psPassword: begin
case P^ of
'@': begin
State := psAuthority;
end;
else begin
Rslt.Password := Rslt.Password + P^;
end;
end;
end;
psPort: begin
case P^ of
'0'..'9': begin
Rslt.Port := Rslt.Port + P^;
end;
'/', '\': begin
PotPath := PotPath + P^;
State := psPath;
end;
' ': begin
State := psEndSp;
end;
else
State := psError;
end;
end;
psPath: begin
case P^ of
'#': begin
if PotPath <> '' then begin
Rslt.Path := AllTrimSpaces(PotPath);
PotPath := '';
end;
State := psFragment;
end;
'?', '&' : begin
if PotPath <> '' then begin
Rslt.Path := AllTrimSpaces(PotPath);
PotPath := '';
end;
Rslt.QueryDelim := P^;
State := psQuery;
end;
' ': begin
State := psEndSp;
end;
else
PotPath := PotPath + P^;
end;
end;
{ Extract "Fragment" (in-page reference) portion of URL }
{ - If URL contains an Entity name then Fragment should be delimited by a '#' }
{ - If URL does not contain Entity name then Fragment may immediately follow a }
{ final slash in the URL's "Path" component, but must still be delimited by }
{ a '#' to indicate that it is a Fragment. In this case the assumption is }
{ that the Fragment refers to the current page }
psFragment: begin
case P^ of
'?', '&': begin
if PotPath <> '' then begin
Rslt.Path := AllTrimSpaces(PotPath);
PotPath := '';
end;
Rslt.QueryDelim := P^;
State := psQuery;
end;
else
Rslt.Fragment := Rslt.Fragment + P^;
end;
end;
{ Extract "Query" portion of URL }
{ - If URL contains an Entity name and/or Fragment then Query should }
{ be delimited by a '?' }
{ - If URL does not contain Entity name and/or Fragment then Query may or may }
{ not be delimited by a '?' }
{ - Individual elements/parameters within the query typically appear in }
{ <name>=<value> pairs separated by '&' characters }
{ See also: SplitParams() and FieldFix() routines }
psQuery: begin
case P^ of
' ': begin
State := psEndSp;
end;
else
Rslt.Query := Rslt.Query + P^;
end;
end;
psEndSp: begin
case P^ of
' ' : { ignore };
else
State := psError;
end;
end;
psError: begin
end;
end {case State };
end;
begin
Rslt.Scheme := '';
Rslt.Authority := '';
Rslt.UserName := '';
Rslt.Password := '';
Rslt.Port := '';
Rslt.Path := '';
Rslt.Fragment := '';
Rslt.Query := '';
P := @URL[1];
State := psStart;
// Result := False;
PotAuth := '';
PotPath := '';
SchemeSeen := False;
for i := 1 to Length(URL) do begin
ProcessChar;
if State = psError then
Break;
Inc(P);
end;
if PotAuth <> '' then
Rslt.Authority := PotAuth;
if Rslt.Path = '' then begin
if PotPath <> '' then
Rslt.Path := AllTrimSpaces(PotPath)
else
Rslt.Path := '/';
end;
Result := State in UrlStops;
end;
{ Build absolute URL from a starting URL (Old) and a new URL (New) }
{ * Old may be empty }
{ * New may be a full address or a path relative to Old }
{ * "FILE://" references are converted for Internet (':'=>'|', '\'=>'/') }
{ * Attempts to handle relative paths containing one or more "../" references }
{ intelligently, but does no error checking that there are sufficient higher }
{ levels in Old to account for the number of "../" levels in New }
{ Change for FPC: renamed Old, New to OldURL, NewURL }
function BuildURL(const OldURL, NewURL: string): string;
var
OldAddrRec : TIpAddrRec;
NewAddrRec : TIpAddrRec;
FoundPos : Integer;
RelPos : Integer;
ParentPos : Integer;
Path : string;
Scheme : string;
Port : string;
begin
Result := '';
Path := '';
{ sanity checks }
if (OldURL = '') and (NewURL = '') then begin
Result := '';
Exit;
end;
if (OldURL = '') and (NewURL <> '') then begin
Result := NewURL;
Exit;
end;
if (OldURL <> '') and (NewURL = '') then begin
Result := OldURL;
Exit;
end;
{ Main processing }
Result := DOSToNetPath(OldURL);
Initialize(OldAddrRec);
Initialize(NewAddrRec);
IpParseURL(OldURL, OldAddrRec);
IpParseURL(NewURL, NewAddrRec);
if OldAddrRec.Scheme = '' then
Scheme := ''
else
Scheme := OldAddrRec.Scheme + '://';
if OldAddrRec.Port = '' then
Port := ''
else
Port := ':' + OldAddrRec.Port;
if CompareText(NewAddrRec.Scheme, 'FILE') = 0 then begin
{ New is a local file }
Result := NewAddrRec.Scheme + '://' + NewAddrRec.Path;
end else if NewAddrRec.Scheme <> '' then begin
{ New is a full address in its own right }
Result := NewURL; { so just return that }
end else if (NewAddrRec.Scheme = '') and (NewURL[1] = '/') then begin
{ New is probably a direct path off the Root }
Result := Scheme + OldAddrRec.Authority + Port; { build Root }
if (NewURL <> '') and (NewURL[1] <> '/') then
Result := Result + '/';
Result := Result + NewURL; { just append }
end else if (NewAddrRec.Scheme = '') and (NewURL[1] <> '.') then begin
{ New is probably a direct path off the current path }
if CompareText(OldAddrRec.Scheme, 'FILE') = 0 then begin
Path := ExtractFilePath(OldAddrRec.Path);
Result := Scheme + Path;
end
else begin
Path := ExtractEntityPath(DosToNetPath(OldAddrRec.Path));
if (Path <> '') and (Path[1] = '/') then
Path := Copy(Path, 2, Length(Path) - 1);
Result := Scheme;
if OldAddrRec.Authority <> '' then
Result := Result + OldAddrRec.Authority + Port + '/';
if Path <> '' then
Result := Result + AppendSlash(Path);
end;
Result := Result + NewURL;
Exit;
end else begin
{ otherwise New should be a relative path of Old }
Path := AppendSlash(ExtractEntityPath(DOSToNetPath(OldAddrRec.Path)));
FoundPos := PosIdx('../', NewURL, 1);
RelPos := FoundPos + 3;
ParentPos := RCharPosIdx('/', Path, Length(Path));
while (FoundPos > 0) do begin
FoundPos := PosIdx('../', NewURL, FoundPos + 3);
if FoundPos > 0 then
RelPos := FoundPos + 3;
ParentPos := RCharPosIdx('/', Path, ParentPos - 1);
end;
Path := AppendSlash(Copy(Path, 1, ParentPos));
Result := Scheme + OldAddrRec.Authority + Path +
Copy(NewURL, RelPos, Length(NewURL) - RelPos + 1);
{ remove shorthand for current directory if it exists }
FoundPos := Pos('/./', Result);
if FoundPos > 0 then
Delete(Result, FoundPos, 2);
end;
Path := OldURL;
Finalize(OldAddrRec);
Finalize(NewAddrRec);
end;
{ Split Internet formated (ampersand '&' separated) parameters }
{ from Parms into Dest }
procedure SplitParams(const Parms : string; Dest : TStrings);
var
P : Integer;
Temp : string;
begin
if not Assigned(Dest) then
Exit;
Dest.Clear;
Temp := Parms;
P := CharPos('&', Temp);
while P > 0 do begin
Dest.Add(Copy(Temp, 1, P - 1));
Temp := Copy(Temp, P + 1, Length(Temp) - P);
P := CharPos('&', Temp);
end;
Dest.Add(Temp);
end;
{ Divide HTTP response header line into individual fields }
{ - HTTP response in the form of: }
{ "HTTP/"<HTTP Version><SP><HTTP Message ID#><SP><HTTP Message String> }
{ for example, if "HTTP/1.1 200 OK" passed in S, procedure returns }
{ "1.1" in V }
{ "200" in MsgID }
{ "OK" in Msg }
procedure SplitHttpResponse(const S: string; var V, MsgID, Msg: string);
var
P: Integer;
Temp: string;
begin
Temp := S;
P := CharPos(' ', Temp);
V := Copy(Temp, 6, P - 6);
Temp := Copy(Temp, P + 1, Length(Temp) - P);
P := CharPos(' ', Temp);
MsgID := Copy(Temp, 1, P - 1);
Msg := Copy(Temp, P + 1, Length(Temp) - P);
end;
{ Convert HTTP Header into TStrings parseable by Name=Value mechanism }
{ - Basically just converts HTTP header fields of the form <NAME>: <VALUE> }
{ pairs into <NAME>=<VALUE> pairs. }
{ - Also parses HTTP header associating }
{ Full header -> "FullHead=" }
{ HTTP version -> "Version=" }
{ HTTP Message ID# -> "MsgID=" }
{ HTTP Message Text -> "Message=" }
procedure FieldFix(Fields : TStrings);
var
i, P : Integer;
S, Ver, ID, Msg : string;
begin
if Fields.Count > 0 then begin
S := Fields[0];
Fields.Delete(0);
SplitHttpResponse(S, Ver, ID, Msg);
Fields.Insert(0, 'Message=' + Msg);
Fields.Insert(0, 'MsgID=' + ID);
Fields.Insert(0, 'Version=' + Ver);
Fields.Insert(0, 'FullHead=' + S);
for i := 4 to Pred(Fields.Count) do begin
P := CharPos(':', Fields[i]);
if P > 0 then begin
S := Fields[i];
Delete(S, P, 1);
Insert('=', S, P);
Fields.Delete(i);
Fields.Insert(i,S);
end;
end;
end;
end;
{ Append slash to Internet path if needed }
function AppendSlash(APath : string) : string;
begin
Result := APath;
if (Result <> '') and (Result[Length(APath)] <> '/') then
Result := Result + '/';
end;
{ Drop trailing slash from Internet path if needed }
function RemoveSlash(APath : string) : string;
begin
Result := APath;
if Result[Length(Result)] = '/' then
Delete(Result, Length(Result), 1);
end;
{ Extract Entity (Filename) portion of Internet Path }
{ Parallel to SysUtils.ExtractFileName for Internet Paths }
function ExtractEntityName(const NamePath : string) : string;
var
P : Integer;
Temp : string;
begin
Result := '';
P := RCharPos('/', NamePath);
if P > 0 then begin
Temp := Copy(NamePath, P + 1, Length(NamePath) - P);
if CharPos('.', Temp) > 0 then
Result := Temp
else
Result := '';
end;
end;
{ Extract Path (non-filename) portion of Internet Path }
{ Parallel to SysUtils.ExtractFilePath for Internet Paths }
function ExtractEntityPath(const NamePath: string): string;
var
P : Integer;
begin
P := RCharPos('/', NamePath);
if P = Length(NamePath) then { no file name on Path }
Result := NamePath
else
Result := Copy(NamePath, 1, P);
end;
{ Return next highest level in Internet path }
{ e.g. if Path parameter contains "/default/pub/pics/jpgs" }
{ function would return "/default/pub/pics" }
function GetParentPath(const Path : string) : string;
var
P : Integer;
begin
if Path = '/' then begin
Result := Path;
Exit;
end;
P := Length(Path);
if Path[P] = '/' then
Dec(P);
while Path[P] <> '/' do
Dec(P);
Result := Copy(Path, 1, P);
end;
{ date stuff }
const
EpochYear = 70; { UNIX Julian time count starts in 1970 }
EpochLowStr = '19';
EpochHiStr = '20';
CanonicalDate = '"%s", dd "%s" yyyy hh:mm:ss "%s00"';
{
Note: The following strings and string arrays are used for
interpreting/building canonical Internet dates and should
NOT be internationalized!
}
{ DayString : string =
'SUNDAY ' +
'MONDAY ' +
'TUESDAY ' +
'WEDNESDAY' +
'THURSDAY ' +
'FRIDAY ' +
'SATURDAY '; }
MonthString : string =
'JANUARY ' +
'FEBRUARY ' +
'MARCH ' +
'APRIL ' +
'MAY ' +
'JUNE ' +
'JULY ' +
'AUGUST ' +
'SEPTEMBER' +
'OCTOBER ' +
'NOVEMBER ' +
'DECEMBER ';
IpMonthsStrings: array[1..12] of string = (
'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
IpDOWStrings: array[1..7] of string = (
'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
type
THttpDateType = (hdtUnknown, hdtRFC822, hdtRFC850, hdtANSIC);
{ Returns numeric month index [1..12] from any unique string }
{ abbreviation of English month name, returns 0 if no match }
function MonStrToInt(MonStr : string) : Integer;
var
P : Integer;
begin
P := PosI(MonStr, MonthString);
if P > 0 then
Result := (P div 9) + 1
else
Result := 0;
end;
{ For two digit year string passed in returns }
{ four digit year string based on EpochYear constant. }
{ If converting YrStr to an integer yields > 99 then }
{ YrStr is returned unchanged }
function EpochStr(YrStr: string) : string;
var
Yr: Word;
begin
Yr := StrToInt(YrStr);
if (Yr > 99) then begin { not a 2 digit year }
Result := YrStr;
Exit;
end;
if (Yr < EpochYear) then begin
Result := EpochHiStr + YrStr;
end
else begin
Result := EpochLowStr + YrStr;
end;
end;
{
Convert an Internet Date string to a TDateTime
If the string isn't in one of the canonical formats (see below)
the Internet start date of Jan 1, 1970 0:0:0:0 is returned
Canonical Internet header date strings are in one of three standard formats:
Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format
}
{-- rewritten to handle common variants such as the Day or Month name
to be fully spelled out where they are not in the canonical form, or to have
a 4 digit year in the RFC 850 style
}
function INetDateStrToDateTime(const DateStr: string): TDateTime;
type
TINetDateState = (idStart, idStartSp, idDow, idDowSp, idDay1, idDay1Sp,
idMon1, idMon1Sp, idMon2, idMon2Sp, idDay2, idYr1,
idPreTimeSp, idHrs, idMin, idSec, idPostTimeSp, {idGMT,} idYr2,
idEndSp, idAM, idPM, idDaySpace1, IdTimeZoneNum, IdTimeZoneAlpha,
idError);
const
AcceptStates: set of TINetDateState = [{idGMT,} idYr2, idSec,
idPostTimeSp, idEndSp,
idTimeZoneAlpha,
idTimeZoneNum];
var
Dow, Day, Mon, Year, Hrs, Min, Sec: string;
Dy, Mo, Yr: Word;
Hr, Mn, Sc: SmallInt;
State: TINetDateState;
P: PChar;
i : Integer;
AMPM : Boolean;
PM : Boolean;
TimeZone : string;
procedure ParseDate;
begin
case State of
idStart: begin
case P^ of
' ' : State := idStartSp;
'A'..'Z', 'a'..'z' : begin
State := idDow;
Dow := Dow + P^;
end;
'0'..'9': begin
State := idDay1;
Day := Day + P^;
end;
else
State := idError;
end;
end;
idStartSp: begin { ignore initial spaces }
case P^ of
' ': { ignore };
'A'..'Z', 'a'..'z' : begin
State := idDow;
Dow := Dow + P^;
end;
else
State := idError;
end;
end;
idDow: begin { all formats start with a DOW string }
case P^ of
'A'..'Z', 'a'..'z' : begin
Dow := Dow + P^;
end;
',', ' ': begin
State := idDowSp;
end;
else
State := idError;
end;
end;
idDowSp: begin { ignore spaces following DOW }
case P^ of
' ': { ignore };
'0'..'9': begin
State := idDay1;
Day := Day + P^;
end;
'A'..'Z', 'a'..'z' : begin
State := idMon1;
Mon := Mon + P^;
end;
else
State := idError;
end;
end;
idDay1: begin { RFC 822 and 850 formats start with day digit }
case P^ of
' ': begin
State := idDay1Sp;
end;
'-': begin
State := idMon2;
end;
'0'..'9': begin
Day := Day + P^;
end;
else
State := idError;
end;
end;
idDay1Sp: begin { ignore spaces following day digit }
case P^ of
' ': { ignore };
'A'..'Z', 'a'..'z' : begin
State := idMon2;
Mon := Mon + P^;
end;
else
State := idError;
end;
end;
idMon1: begin { ANSI C format starts with month string }
case P^ of
' ': begin
State := idMon1Sp;
end;
'A'..'Z', 'a'..'z' : begin
Mon := Mon + P^;
end;
else
State := idError;
end;
end;
idMon1Sp: begin { ignore spaces after ANSI C month string }
case P^ of
' ': { ignore };
'0'..'9': begin
State := idDay2;
Day := Day + P^;
end;
else
State := idError;
end;
end;
idMon2: begin { RFC 822 and 850 month string }
case P^ of
' ' : begin
State := idMon2Sp;
end;
'-' : begin
State := idYr1;
end;
'A'..'Z', 'a'..'z' : begin
Mon := Mon + P^;
end;
else
State := idError;
end;
end;
idMon2Sp: begin {ignore spaces after month string }
case P^ of
' ': { ignore };
'0'..'9': begin
State := idYr1;
Year := Year + P^;
end;
else
State := idError;
end;
end;
idDay2: begin { ANSI C format Day string }
case P^ of
'0'..'9': begin
Day := Day + P^;
end;
',' : begin
State := idDaySpace1;
end;
' ': begin
State := idPreTimeSp;
end;
else
State := idError;
end;
end;
idDaySpace1 : begin
case P^ of
' ' : begin
end;
'0'..'9' : begin
Year := Year + P^;
State := idYr1;
end;
else
State := idError;
end;
end;
idYr1: begin { RFC 822 and 850 year string }
case P^ of
'0'..'9': begin
Year := Year + P^;
end;
' ': begin
State := idPreTimeSp;
end;
else
State := idError;
end;
end;
idPreTimeSp: begin { ignore spaces before start of time string }
case P^ of
' ': { ignore };
'0'..'9': begin
State := idHrs;
Hrs := Hrs + P^;
end;
else
State := idError;
end;
end;
idHrs: begin { hours string }
case P^ of
':': begin
State := idMin;
end;
'0'..'9': begin
Hrs := Hrs + P^;
end;
else
State := idError;
end;
end;
idMin: begin { minutes string }
case P^ of
':': begin
State := idSec;
end;
'0'..'9': begin
Min := Min + P^;
end;
' ' : begin
State := idPostTimeSp;
Sec := '00';
end;
else
State := idError;
end;
end;
idSec: begin { seconds string }
case P^ of
' ': begin
State := idPostTimeSp;
end;
'0'..'9': begin
Sec := Sec + P^;
end;
'A', 'a' : begin
AMPM := True;
PM := False;
State := idAM;
end;
'P', 'p' : begin
AMPM := True;
PM := True;
State := idPM;
end;
else
State := idError;
end;
end;
idAM : begin { AM string }
case P^ of
' ' : begin
State := idPostTimeSp
end;
'M', 'm' : begin
State := idPostTimeSp;
end;
else
State := idError;
end;
end;
idPM : begin { PM string }
case P^ of
' ' : begin
State := idPostTimeSp
end;
'M', 'm' : begin
State := idPostTimeSp;
end;
else
State := idError;
end;
end;
idPostTimeSp: begin { ignore spaces before after time string }
case P^ of
' ': { ignore };
'0'..'9': begin
State := idYr2;
Year := Year + P^;
end;
{'G', 'g': begin }
{ State := idGMT; }
{end; }
'-' : begin
TimeZone := TimeZone + P^;
State := IdTimeZoneNum;
end;
'+' : begin
TimeZone := TimeZone + P^;
State := IdTimeZoneNum;
end;
'A'..'Z', 'a'..'z' : begin
TimeZone := TimeZone + P^;
State := IdTimeZoneAlpha;
end;
else
State := idError;
end;
end;
idTimeZoneNum : begin
case P^ of
'0'..'9' : begin
TimeZone := TimeZone + P^;
end;
' ' : begin
State := idEndSp;
end;
else
State := idError;
end;
end;
idTimeZoneAlpha : begin
case P^ of
'A'..'Z', 'a'..'z' : begin
TimeZone := TimeZone + P^;
end;
' ' : begin
if CompareText(TimeZone, 'AM') = 0 then begin
AMPM := True;
PM := False;
State := IdTimeZoneAlpha;
TimeZone := '';
end else if CompareText(TimeZone, 'PM') = 0 then begin
AMPM := True;
PM := True;
State := IdTimeZoneAlpha;
TimeZone := '';
end else
State := idEndSp;
end;
else
State := idError;
end;
end;
{idGMT: begin } { RFC 822 and 850 should end with "GMT" }
{ case P^ of }
{ 'M', 'T': begin }
{ end; }
{ }
{ ' ': begin }
{ State := idEndSp; }
{ end; }
{ }
{ else }
{ State := idError; }
{ end; }
{end; }
idYr2: begin { ANSI C time ends with Year }
case P^ of
'0'..'9': begin
Year := Year + P^;
end;
' ': begin
State := idEndSp;
end;
else
State := idError;
end;
end;
idEndSp: begin { ignore trailing spaces }
case P^ of
' ': {ignore};
else
State := idError;
end;
end;
idError: begin
end;
end;
end;
begin
Result := EncodeDate(1970, 1, 1);
if DateStr = '' then Exit;
{ clear parse strings }
Dow := '';
Day := '';
Mon := '';
Year := '';
Hrs := '';
Min := '';
Sec := '';
AMPM := False;
PM := False;
TimeZone := '';
{ start at first character }
P := @DateStr[1];
{ iterate characters }
for i := 1 to Length(DateStr) do begin
ParseDate;
if State = idError then
Exit { error in date format, give up }
else
Inc(P);
end;
if State = idTimeZoneAlpha then begin
if CompareText(TimeZone, 'AM') = 0 then begin
AMPM := True;
PM := False;
TimeZone := '';
end else if CompareText(TimeZone, 'PM') = 0 then begin
AMPM := True;
PM := True;
TimeZone := '';
end;
end;
if State = idMin then begin
Sec := '00';
State := idSec;
end;
{ date string terminated prematurely }
if not (State in AcceptStates) then Exit;
{ validate day of week and Month name vs. expected }
// if not ((Pos(UpperCase(Dow), DayString) mod 9) = 1) then Exit; // !!!
if not ((PosI(Mon, MonthString) mod 9) = 1) then Exit;
{ correct two digit years }
Year := EpochStr(Year);
{ convert D-M-Y string representations to integers }
Dy := StrToIntDef(Day, 0);
Mo := MonStrToInt(Mon);
Yr := StrToIntDef(Year, 0);
{ check for errors or out of range }
if (Dy = 0) or (Mo = 0) or (Yr = 0) then Exit;
if (Dy > 31) or (Mo > 12) then Exit;
{ convert H-M-S string representations to integers }
Hr := StrToIntDef(Hrs, -1);
Mn := StrToIntDef(Min, -1);
Sc := StrToIntDef(Sec, -1);
if AMPM then begin
if (Hr < 12) and (PM) then
Hr := Hr + 12;
if (Hr = 12) and (not PM) then
Hr := 0;
end;
{ check for errors or out of range }
if (Hr = -1) or (Mn = -1) or (Sc = -1) then Exit;
if (Hr > 24) or (Mn > 60) or (Sc > 60) then Exit;
{ tests passed, generate final result }
Result := ComposeDateTime(EncodeDate(Yr, Mo, Dy),EncodeTime(Hr, Mn, Sc, 0));
end;
{ increment TDateTime by supplied number of minutes }
function IncMins(const Date: TDateTime; NumberOfMins: Integer): TDateTime;
begin
Result := Date + NumberOfMins / 1440.0;
end;
{ returns the current local TimeZone "bias" in minutes from UTC (GMT) }
function TimeZoneBias : Integer;
begin
Result:=0;
writeln('TimeZoneBias ToDo');
end;
(*
const
TIME_ZONE_ID_UNKNOWN = 0;
TIME_ZONE_ID_STANDARD = 1;
TIME_ZONE_ID_DAYLIGHT = 2;
{$ENDIF}
var
TZI : TTimeZoneInformation;
begin
Result := 0;
case GetTimeZoneInformation(TZI) of
TIME_ZONE_ID_UNKNOWN : Result := 0;
TIME_ZONE_ID_STANDARD : Result := TZI.Bias + TZI.StandardBias;
TIME_ZONE_ID_DAYLIGHT : Result := TZI.Bias + TZI.DaylightBias;
end;
end;
*)
{ Format TDateTime to standard HTTP date string }
function DateTimeToINetDateTimeStr(DateTime: TDateTime): string;
var
Yr, Mo, Dy: Word;
s: String;
begin
DecodeDate(DateTime, Yr, Mo, Dy);
s := Format('%g', [Abs(TimeZoneBias/60)]);
if Length(s) = 1 then
s := '0' + s;
if TimeZoneBias < 0 then s := '-' + s;
Result := FormatDateTime(CanonicalDate, DateTime);
Result := Format(Result, [IpDOWStringS[DayOfWeek(DateTime)], IpMonthsStrings[Mo], s]);
end;
{ File/Directory Stuff }
{ Retreive Windows "MIME" type for a particular file extension }
{$ifndef MSWindows}
{define some basic mime types}
const MimeTypeExt : Array[0..4] of String = ('.htm','.html','.txt','.jpg','.png');
MimeTypes : Array[0..4] of String = ('text/html','text/html','text/plain','image/jpeg','image/png');
{$endif}
function GetLocalContent(const TheFileName: string): string;
var
Reg : TRegistry;
Ext : string;
{$ifndef MSWindows}
i : integer;
{$ENDIF}
begin
Result := '';
Ext := ExtractFileExt(TheFileName);
{$ifndef MSWindows}
for i := 0 to high(MimeTypeExt) do
if CompareText(MimeTypeExt[i], Ext) = 0 then
begin
result := MimeTypes[i];
break;
end;
{$endif}
if result = '' then
begin
Reg := nil;
try
Reg := TRegistry.Create;
Reg.RootKey := HKEY_CLASSES_ROOT;
if Reg.OpenKeyReadOnly(Ext) then
Result := Reg.ReadString('Content Type');
finally
Reg.CloseKey;
Reg.Free;
end;
end;
//DebugLn('IpUtils.GetLocalContent File:'+TheFileName+' Result:'+result);
end;
{ Determine if a directory exists }
function DirExists(Dir : string): Boolean;
begin
Result:=DirPathExists(Dir);
end;
{ Get temporary filename as string }
function GetTemporaryFile(const Path : string) : string;
begin
Result:=GetTempFileNameUTF8(Path,'IP_');
end;
{ Get Windows system TEMP path in a string }
function GetTemporaryPath: string;
begin
writeln('ToDo: IpUtils.GetTemporaryPath');
Result:='';
end;
{ Append backslash to DOS path if needed }
function AppendBackSlash(APath : string) : string;
begin
Result := AppendPathDelim(APath);
end;
{ Remove trailing backslash from a DOS path if needed }
function RemoveBackSlash(APath: string) : string;
begin
Result := ChompPathDelim(APath);
end;
{***********************************************}
{cookie support}
const
CookieDefaults: array [1..5] of string[8] =
('Version=',
'Path=',
'Domain=',
'Max-Age=',
'Path=');
function FixDefaults(const S: string): string;
var
i : Integer;
begin
Result := S;
for i := 1 to 5 do
if Pos(CookieDefaults[i], S) = 1 then
Result := '$' + S;
end;
procedure SplitCookieFields(const Data: string; Fields: TStrings);
{
Split Cookie data fields into items in a TStrings instance, Cookie fields will
be in Name="Value" pairs easily accessed via the associated TStrings properties
routine automatically prepends '$' to default Cookie fields for response header
}
var
P1, P2 : Integer;
S, Temp : string;
begin
Temp := Data + ';';
P1 := 1;
P2 := CharPosIdx(';', Temp, P1);
while P2 > 0 do begin
S := Trim(Copy(Temp, P1, P2 - P1));
Fields.Add(FixDefaults(S));
P1 := P2 + 1;
P2 := CharPosIdx(';', Temp, P1);
end;
end;
end.
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