The initial idea was to make 2 procedures (backup and restore) from the application, the backup was done using mysqldump and the restore with ZQuery, I try to make it with ZSQLProcessor but it stop working, the code is the following:
For Backup:
Code: Select all
procedure TMain.BackupClick(Sender: TObject);
const
READ_BYTES = 2048;
var
command: TProcess;
s: string;
output: TStringList;
BytesRead, n: LongInt;
m: TMemoryStream;
begin
if not (ZConnection1.User = 'root') then begin
ShowMessage('Only root could access.');
Exit
end;
SaveDialog1.Free;
SaveDialog1 := TSaveDialog.Create(Self);
SaveDialog1.InitialDir:= GetUserDir + 'My Documents\';
SaveDialog1.Filter:='Backup Files|*.bfl';
if SaveDialog1.Execute then begin
s := SaveDialog1.FileName;
if not (copy(s,Length(s)-3,Length(s)-1) = '.bfl') then
s := s + '.bfl';
command := TProcess.Create(Nil);
output := TStringList.Create;
M := TMemoryStream.Create;
BytesRead := 0;
command.CommandLine := 'c:\mysqldump -u root -p'+ZConnection1.Password+' -h '+ZConnection1.HostName+' database';
command.Options := command.Options + [poUsePipes];
command.Execute;
while command.Running do begin
// ensure the space
M.SetSize(BytesRead + READ_BYTES);
// we try to read
n := command.Output.Read((M.Memory + BytesRead)^, READ_BYTES);
if n > 0 then
Inc(BytesRead, n)
else
// whitout data, wait 100 ms
Sleep(100);
end;
// we read the last part
repeat
// ensure the space
M.SetSize(BytesRead + READ_BYTES);
// we try to read
n := command.Output.Read((M.Memory + BytesRead)^, READ_BYTES);
if n > 0 then
Inc(BytesRead, n);
until n <= 0;
M.SetSize(BytesRead);
output.LoadFromStream(M);
output.SaveToFile(s);
output.Free;
command.Free;
M.Free;
ShowMessage('Backup ready.')
end else
ShowMessage('Backup canceled.');
end;
Code: Select all
procedure TFMain.restoreClick(Sender: TObject);
var
s: string;
tfFile: TextFile;
begin
if not (ZConnection1.User = 'root') then begin
ShowMessage('Only root could access.');
Exit
end;
OpenDialog1.Free;
OpenDialog1 := tOpenDialog.Create(Self);
OpenDialog1.InitialDir:=GetUserDir+'My Documents\';
OpenDialog1.Filter:='Backup Files|*.bfl';
if OpenDialog1.Execute then begin
AssignFile(tfFile, OpenDialog1.FileName);
if not FileExists(OpenDialog1.FileName) then
exit;
reset(tfFile);
ZQuery1.SQL.Clear;
readln(tfFile,s);
While not eof(tfFile) do begin
Readln(tfFile,s);
if length(s) > 0 then begin
s := StringReplace(s, #10, '', [rfReplaceAll]);
s := StringReplace(s, #13, '', [rfReplaceAll]);
s := StringReplace(s, #9, ' ', [rfReplaceAll]);
if not ((s[1]+s[2]) = '--') then begin
ZQuery1.SQL.Add(s);
if s[length(s)] = ';' then begin
ZQuery1.ExecSQL;
ZQuery1.SQL.Clear
end
end
end
end;
CloseFile(tfFile);
ShowMessage('Restauration done.');
end else
ShowMessage('Restauration canceled.');
end;
