Subversion Repositories userdetect2

unit UD2_Utils;

interface

{$IF CompilerVersion >= 25.0}

{$LEGACYIFEND ON}

{$IFEND}

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);

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;

procedure CheckLastOSCall(AThrowException: boolean);

resourcestring

  LNG_UNKNOWN_ERROR = 'Operating system error %d';

var

  LastError: Cardinal;

  sError: string;

begin

  LastError := GetLastError;

  if LastError <> 0 then

  begin

    if AThrowException then

    begin

      RaiseLastOSError;

    end

    else

    begin

      sError := SysErrorMessage(LastError);

      // Some errors have no error message, e.g. error 193 (BAD_EXE_FORMAT) in the German version of Windows 10

      if sError = '' then sError := Format(LNG_UNKNOWN_ERROR, [LastError]);

      MessageDlg(sError, 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);

  if cmdArgs <> '' then sei.lpParameters := PChar(cmdArgs);

  if cmdDir  <> '' then sei.lpDirectory  := PChar(cmdDir);

  sei.nShow        := WindowMode;

  if ShellExecuteEx(@sei) then Exit;

  CheckLastOSCall(false);

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.