Пример FTP сервера
Пример FTP сервера
unitUnit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, IdBaseComponent, IdComponent, IdUDPBase, IdUDPServer,
IdTrivialFTPServer, StdCtrls, IdUDPClient, IdTrivialFTP;
type
TForm1 = class(TForm)
IdTrivialFTPServer1: TIdTrivialFTPServer;
IdTrivialFTP1: TIdTrivialFTP;
Button1: TButton;
Button2: TButton;
procedure FormCreate(Sender: TObject);
procedure IdTrivialFTPServer1ReadFile(Sender: TObject;
var FileName: string; const PeerInfo: TPeerInfo;
var GrantAccess: Boolean; var AStream: TStream;
var FreeStreamOnComplete: Boolean);
procedure IdTrivialFTPServer1TransferComplete(Sender: TObject;
const Success: Boolean; const PeerInfo: TPeerInfo; AStream: TStream;
const WriteOperation: Boolean);
procedure IdTrivialFTPServer1WriteFile(Sender: TObject;
var FileName: string; const PeerInfo: TPeerInfo;
var GrantAccess: Boolean; var AStream: TStream;
var FreeStreamOnComplete: Boolean);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
TFTPPath: string;
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
begin
IdTrivialFTPServer1.ThreadedEvent := True;
IdTrivialFTPServer1.Active := True;
{ Set the path to where the files will be stored/retreived }
TFTPPath := IncludeTrailingPathDelimiter('C:\Temp');
end;
procedure TForm1.IdTrivialFTPServer1ReadFile(Sender: TObject;
var FileName: string; const PeerInfo: TPeerInfo;
var GrantAccess: Boolean; var AStream: TStream;
var FreeStreamOnComplete: Boolean);
var
FS: TFileStream;
begin
FreeStreamOnComplete := True;
try
{ Convert UNIX style filenames to WINDOWS style }
while Pos('/', Filename) <> 0 do
Filename[Pos('/', Filename)] := '\';
{ Assure that the filename DOES NOT CONTAIN any path information }
Filename := ExtractFileName(Filename);
{ Check if file exists }
if FileExists(TFTPPath + Filename) then
begin
{ Open file in READ ONLY mode }
FS := TFileStream.Create(TFTPPath + Filename,
fmOpenRead or fmShareDenyWrite);
{ Assign stream to variable }
AStream := FS;
{ Set parameters }
GrantAccess := True;
end
else
begin
GrantAccess := False;
end;
except
{ On errors, deny access }
GrantAccess := False;
if Assigned(FS) then
FreeAndNil(FS);
end;
end;
procedure TForm1.IdTrivialFTPServer1WriteFile(Sender: TObject;
var FileName: string; const PeerInfo: TPeerInfo;
var GrantAccess: Boolean; var AStream: TStream;
var FreeStreamOnComplete: Boolean);
var
FS: TFileStream;
begin
try
{ Convert UNIX style filenames to WINDOWS style }
while Pos('/', Filename) <> 0 do
Filename[Pos('/', Filename)] := '\';
{ Assure that the filename DOES NOT CONTAIN any path information }
Filename := ExtractFileName(Filename);
{ Open file in WRITE ONLY mode }
FS := TFileStream.Create(TFTPPath + Filename,
fmCreate or fmShareExclusive);
{ Copy all the data }
AStream := FS;
{ Set parameters }
FreeStreamOnComplete := True;
GrantAccess := True;
except
{ On errors, deny access }
GrantAccess := False;
if Assigned(FS) then
FreeAndNil(FS);
end;
end;
procedure TForm1.IdTrivialFTPServer1TransferComplete(Sender: TObject;
const Success: Boolean; const PeerInfo: TPeerInfo; AStream: TStream;
const WriteOperation: Boolean);
begin
// Success = TRUE if the read/write operation was successfull
// WriteOperation = TRUE if the client SENT a file to the server
try
{ Close the FileStream }
if Assigned(AStream) then
FreeAndNil(AStream);
except
end;
end;
// Example of how to DOWNLOAD a file from the server
procedure TForm1.Button1Click(Sender: TObject);
var
ST: TMemoryStream;
begin
ST := TMemoryStream.Create;
IdTrivialFTP1.Get('testfile.dat', ST);
if Assigned(ST) then
begin
ShowMessage('Filesize=' + IntToStr(ST.Size));
FreeAndNil(ST);
end;
end;
// Example of how to UPLOAD a file to the server
procedure TForm1.Button2Click(Sender: TObject);
var
ST: TMemoryStream;
I: Integer;
S: string;
begin
{ Create stream }
ST := TMemoryStream.Create;
{ Initialize data }
S := 'This is a test file. It whould appear in the ' +
'TFTP Server upload directory.' + #13#10;
{ Store in stream }
ST.Write(S[1], Length(S));
ST.Position := 0;
{ Send Stream to TFTP Server }
IdTrivialFTP1.Put(ST, 'textfile.txt');
{ Free Stream }
if Assigned(ST) then
FreeAndNil(ST);
{ Show a dialog }
ShowMessage('Done!');
end;
end.