server.pas

Delphi 7组件与分布式应用开发源码,介绍了基础的组件应用实例

unit server;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, IdBaseComponent, IdComponent, IdTCPServer, StdCtrls;

type
  TForm1 = class(TForm)
    IdTCPServer1: TIdTCPServer;
    Label1: TLabel;
    Label2: TLabel;
    procedure IdTCPServer1Execute(AThread: TIdPeerThread);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure IdTCPServer1Connected(AThread: TIdPeerThread);
  private
    { Private declarations }
    StringListZipCode: TStringList;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
begin
   StringListZipCode:=TStringList.Create;
   StringListZipCode.LoadFromFile(ExtractFilePath(Application.EXEName) + 'ZipCodes.dat');
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
    StringListZipCode.Free;
end;

procedure TForm1.IdTCPServer1Execute(AThread: TIdPeerThread);
var
   sClientCommand:string;
begin
    with AThread.Connection do begin
       sClientCommand := ReadLn;
       //AnsiLowerCase(sClientCommand);//都变成小写
       if SameText(sClientCommand, 'QUIT') then
       begin
          WriteLn('服务器停止服务，连接关闭！');
          Disconnect;
       end else if SameText(Copy(sClientCommand, 1, 8), 'ZipCode ') then
          begin
               WriteLn(StringListZipCode.Values[Copy(sClientCommand, 9, MaxInt)]);
          end;
    end;
end;

procedure TForm1.IdTCPServer1Connected(AThread: TIdPeerThread);
begin
     AThread.Connection.WriteLn('与客户端连接成功');
end;

end.