unit UD2_Utils;
interface
{$IF CompilerVersion >= 25.0}
{$LEGACYIFEND ON}
{$IFEND}
{$INCLUDE 'UserDetect2.inc'}
uses
Windows, SysUtils, Dialogs, ShellAPI;
type
TArrayOfString = array of String;
TIconFileIdx = record
FileName: string;
IconIndex: integer;
end;
const
// Prefixes for UD2_RunCmd()
UD2_RUN_IN_OWN_DIRECTORY_PREFIX = '$RIOD$';
function SplitString(const aSeparator, aString: String; aMax: Integer = 0): TArrayOfString;
function BetterInterpreteBool(str: String): boolean;
function GetOwnCmdName: string;
function ExpandEnvStr(const szInput: string): string;
procedure UD2_RunCMD(cmdLine: string; WindowMode: integer);
function SplitIconString(IconString: string): TIconFileIdx;
// function GetHTML(AUrl: string): string;
procedure VTS_CheckUpdates(VTSID, CurVer: string);
function FormatOSError(ec: DWORD): string;
implementation
uses
WinInet, Forms;
function SplitString(const aSeparator, aString: String; aMax: Integer = 0): TArrayOfString;
// http://stackoverflow.com/a/2626991/3544341
var
i, strt, cnt: Integer;
sepLen: Integer;
procedure AddString(aEnd: Integer = -1);
var
endPos: Integer;
begin
if (aEnd = -1) then
endPos := i
else
endPos := aEnd + 1;
if (strt < endPos) then
result[cnt] := Copy(aString, strt, endPos - strt)
else
result[cnt] := '';
Inc(cnt);
end;
begin
if (aString = '') or (aMax < 0) then
begin
SetLength(result, 0);
EXIT;
end;
if (aSeparator = '') then
begin
SetLength(result, 1);
result[0] := aString;
EXIT;
end;
sepLen := Length(aSeparator);
SetLength(result, (Length(aString) div sepLen) + 1);
i := 1;
strt := i;
cnt := 0;
while (i <= (Length(aString)- sepLen + 1)) do
begin
if (aString[i] = aSeparator[1]) then
if (Copy(aString, i, sepLen) = aSeparator) then
begin
AddString;
if (cnt = aMax) then
begin
SetLength(result, cnt);
EXIT;
end;
Inc(i, sepLen - 1);
strt := i + 1;
end;
Inc(i);
end;
AddString(Length(aString));
SetLength(result, cnt);
end;
function BetterInterpreteBool(str: String): boolean;
resourcestring
LNG_CANNOT_INTERPRETE_BOOL = 'Cannot determinate the boolean value of "%s"';
begin
str := LowerCase(str);
if (str = 'yes') or (str = 'true') or (str = '1') then
result := true
else if (str = 'no') or (str = 'false') or (str = '0') then
result := false
else
raise EConvertError.CreateFmt(LNG_CANNOT_INTERPRETE_BOOL, [str]);
end;
function GetOwnCmdName: string;
begin
result := ParamStr(0);
result := ExtractFileName(result);
result := ChangeFileExt(result, '');
result := UpperCase(result);
end;
function ExpandEnvStr(const szInput: string): string;
// http://stackoverflow.com/a/2833147/3544341
const
MAXSIZE = 32768;
begin
SetLength(Result, MAXSIZE);
SetLength(Result, ExpandEnvironmentStrings(pchar(szInput),
@Result[1],length(Result)));
end;
function FormatOSError(ec: DWORD): string;
resourcestring
LNG_UNKNOWN_ERROR = 'Operating system error %d';
begin
result := SysErrorMessage(ec);
// Some errors have no error message, e.g. error 193 (BAD_EXE_FORMAT) in the German version of Windows 10
if result = '' then result := Format(LNG_UNKNOWN_ERROR, [ec]);
end;
procedure CheckLastOSCall(AThrowException: boolean);
var
LastError: Cardinal;
begin
LastError := GetLastError;
if LastError <> 0 then
begin
if AThrowException then
begin
RaiseLastOSError;
end
else
begin
MessageDlg(FormatOSError(LastError), mtError, [mbOK], 0);
end;
end;
end;
function SplitIconString(IconString: string): TIconFileIdx;
var
p: integer;
begin
p := Pos(',', IconString);
if p = 0 then
begin
result.FileName := IconString;
result.IconIndex := 0;
end
else
begin
result.FileName := ExpandEnvStr(copy(IconString, 0, p-1));
result.IconIndex := StrToInt(Copy(IconString, p+1, Length(IconString)-p));
end;
end;
procedure UD2_RunCMD(cmdLine: string; WindowMode: integer);
// Discussion: http://stackoverflow.com/questions/32802679/acceptable-replacement-for-winexec/32804669#32804669
// Version 1: http://pastebin.com/xQjDmyVe
// --> CreateProcess + ShellExecuteEx
// --> Problem: Run-In-Same-Directory functionality is not possible
// (requires manual command and argument separation)
// Version 2: http://pastebin.com/YpUmF5rd
// --> Splits command and arguments manually, and uses ShellExecute
// --> Problem: error handling wrong
// --> Problem: Run-In-Same-Directory functionality is not implemented
// Current version:
// --> Splits command and arguments manually, and uses ShellExecute
// --> Run-In-Same-Directory functionality is implemented
resourcestring
LNG_INVALID_SYNTAX = 'The command line has an invalid syntax';
var
cmdFile, cmdArgs, cmdDir: string;
p: integer;
sei: TShellExecuteInfo;
begin
// We need a function which does following:
// 1. Replace the Environment strings, e.g. %SystemRoot%
// 2. Runs EXE files with parameters (e.g. "cmd.exe /?")
// 3. Runs EXE files without path (e.g. "calc.exe")
// 4. Runs EXE files without extension (e.g. "calc")
// 5. Runs non-EXE files (e.g. "Letter.doc")
// 6. Commands with white spaces (e.g. "C:\Program Files\xyz.exe") must be enclosed in quotes.
cmdLine := ExpandEnvStr(cmdLine);
// Split command line from argument list
if Copy(cmdLine, 1, 1) = '"' then
begin
cmdLine := Copy(cmdLine, 2, Length(cmdLine)-1);
p := Pos('"', cmdLine);
if p = 0 then
begin
// No matching quotes
// CreateProcess() handles the whole command line as single file name ("abc -> "abc")
// ShellExecuteEx() does not accept the command line
MessageDlg(LNG_INVALID_SYNTAX, mtError, [mbOK], 0);
Exit;
end;
cmdFile := Copy(cmdLine, 1, p-1);
cmdArgs := Copy(cmdLine, p+2, Length(cmdLine)-p-1);
end
else
begin
p := Pos(' ', cmdLine);
if p = 0 then
begin
cmdFile := cmdLine;
cmdArgs := '';
end
else
begin
cmdFile := Copy(cmdLine, 1, p-1);
cmdArgs := Copy(cmdLine, p+1, Length(cmdLine)-p);
end;
end;
if Copy(cmdLine, 1, Length(UD2_RUN_IN_OWN_DIRECTORY_PREFIX)) = UD2_RUN_IN_OWN_DIRECTORY_PREFIX then
begin
cmdLine := Copy(cmdLine, 1+Length(UD2_RUN_IN_OWN_DIRECTORY_PREFIX), Length(cmdLine)-Length(UD2_RUN_IN_OWN_DIRECTORY_PREFIX));
cmdFile := ExtractFileName(cmdLine);
cmdDir := ExtractFilePath(cmdLine);
end
else
begin
cmdFile := cmdLine;
cmdDir := '';
end;
ZeroMemory(@sei, SizeOf(sei));
sei.cbSize := SizeOf(sei);
sei.lpFile := PChar(cmdFile);
{$IFNDEF PREFER_SHELLEXECUTEEX_MESSAGES}
sei.fMask := SEE_MASK_FLAG_NO_UI;
{$ENDIF}
if cmdArgs <> '' then sei.lpParameters := PChar(cmdArgs);
if cmdDir <> '' then sei.lpDirectory := PChar(cmdDir);
sei.nShow := WindowMode;
if ShellExecuteEx(@sei) then Exit;
{$IFNDEF PREFER_SHELLEXECUTEEX_MESSAGES}
CheckLastOSCall(false);
{$ENDIF}
end;
function GetHTML(AUrl: string): string;
// http://www.delphipraxis.net/post43515.html
var
databuffer : array[0..4095] of char;
ResStr : string;
hSession, hfile: hInternet;
dwindex,dwcodelen,dwread,dwNumber: cardinal;
dwcode : array[1..20] of char;
res : pchar;
Str : pchar;
begin
ResStr:='';
if system.pos('http://',lowercase(AUrl))=0 then
AUrl:='http://'+AUrl;
// Hinzugefügt
Application.ProcessMessages;
hSession:=InternetOpen('InetURL:/1.0',
INTERNET_OPEN_TYPE_PRECONFIG,
nil,
nil,
0);
if assigned(hsession) then
begin
// Hinzugefügt
application.ProcessMessages;
hfile:=InternetOpenUrl(
hsession,
pchar(AUrl),
nil,
0,
INTERNET_FLAG_RELOAD,
0);
dwIndex := 0;
dwCodeLen := 10;
// Hinzugefügt
application.ProcessMessages;
HttpQueryInfo(hfile,
HTTP_QUERY_STATUS_CODE,
@dwcode,
dwcodeLen,
dwIndex);
res := pchar(@dwcode);
dwNumber := sizeof(databuffer)-1;
if (res ='200') or (res ='302') then
begin
while (InternetReadfile(hfile,
@databuffer,
dwNumber,
DwRead)) do
begin
// Hinzugefügt
application.ProcessMessages;
if dwRead =0 then
break;
databuffer[dwread]:=#0;
Str := pchar(@databuffer);
resStr := resStr + Str;
end;
end
else
ResStr := 'Status:'+res;
if assigned(hfile) then
InternetCloseHandle(hfile);
end;
// Hinzugefügt
Application.ProcessMessages;
InternetCloseHandle(hsession);
Result := resStr;
end;
procedure VTS_CheckUpdates(VTSID, CurVer: string);
resourcestring
(*
LNG_DOWNLOAD_ERR = 'Ein Fehler ist aufgetreten. Wahrscheinlich ist keine Internetverbindung aufgebaut, oder der der ViaThinkSoft-Server temporär offline.';
LNG_NEW_VERSION = 'Eine neue Programmversion ist vorhanden. Möchten Sie diese jetzt herunterladen?';
LNG_NO_UPDATE = 'Es ist keine neue Programmversion vorhanden.';
*)
LNG_DOWNLOAD_ERR = 'An error occurred while searching for updates. Please check your internet connection and firewall.';
LNG_NEW_VERSION = 'A new version is available. Do you want to download it now?';
LNG_NO_UPDATE = 'You already have the newest program version.';
var
temp: string;
begin
temp := GetHTML('http://www.viathinksoft.de/update/?id='+VTSID);
if Copy(temp, 0, 7) = 'Status:' then
begin
MessageDlg(LNG_DOWNLOAD_ERR, mtError, [mbOK], 0);
end
else
begin
if GetHTML('http://www.viathinksoft.de/update/?id='+VTSID) <> CurVer then
begin
if MessageDlg(LNG_NEW_VERSION, mtConfirmation, mbYesNoCancel, 0) = ID_YES then
begin
shellexecute(application.handle, 'open', pchar('http://www.viathinksoft.de/update/?id=@spacemission'), '', '', sw_normal);
end;
end
else
begin
MessageDlg(LNG_NO_UPDATE, mtInformation, [mbOk], 0);
end;
end;
end;
end.