一个多线程后台扫描的程序和源代码

源代码网整理以下界面是防明小子的那个扫描工具写的，算是学习多线程的一个例子把

界面图示：

源代码网整理以下http://www.wrsky.com/attachment/3_1875.jpg

程序和源代码：

源代码网整理以下http://www.wrsky.com/job.php?action=download&pid=tpc&tid=9410&aid=1876

源代码网整理以下使用D7编写，主要部分代码：


//主界面部分
unit1.pas

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, Tabs, ExtCtrls, ComCtrls, IdHTTP, Unit2;

type
TForm1 = class(TForm)
Label1: TLabel;
Edit1: TEdit;
Button1: TButton;
TabSet1: TTabSet;
StatusBar1: TStatusBar;
ProgressBar1: TProgressBar;
Panel1: TPanel;
GroupBox1: TGroupBox;
Memo1: TMemo;
Edit2: TEdit;
Button2: TButton;
Button3: TButton;
Button4: TButton;
GroupBox2: TGroupBox;
Memo2: TMemo;
GroupBox3: TGroupBox;
Memo3: TMemo;
Button5: TButton;
OpenDialog1: TOpenDialog;
procedure TabSet1Click(Sender: TObject);
procedure Button5Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
procedure Button3Click(Sender: TObject);

软件开发网 www.mscto.com

private
{ Private declarations }
//弹出信息框
procedure MsgBox(strMsg: string);
procedure ThreadExit(sender: TObject);
public
{ Public declarations }
end;

var
Form1: TForm1;
Thread1: array of T1; // 定义线程数组
n: integer = 0;
bool: boolean = True;

implementation

{$R *.dfm}

procedure TForm1.TabSet1Click(Sender: TObject);
begin
if TabSet1.TabIndex = 0 then
begin
GroupBox2.Visible :=true;
GroupBox3.Visible :=true;
GroupBox1.Visible :=false;
Panel1.Visible :=False;
end else
begin
GroupBox2.Visible :=false;
GroupBox3.Visible :=false;
GroupBox1.Visible :=true;
Panel1.Visible :=true;
end;

end;

procedure TForm1.Button5Click(Sender: TObject);
var
i:integer;
url:string;
begin
if Edit1.Text="" then
begin
MsgBox("请输入要检测的网站地址！");
exit;
end;
Memo3.Clear;
Memo2.Clear;
ProgressBar1.Min :=0;

ProgressBar1.Max :=Memo1.Lines.Count;
ProgressBar1.Step :=1;
ProgressBar1.Position :=0;
for i:=0 to Memo1.Lines.Count - 1 do
begin
url :=trim(Edit1.Text) Memo1.Lines;
Memo3.Lines.Add(url);
GroupBox3.Caption :="信息：已检测" inttostr(Memo3.Lines.Count) "个页面";
ProgressBar1.StepIt;
if CheckUrl(url) then
begin
Memo2.Lines.Add("该URL存在! - " url);
GroupBox2.Caption :="存在：共找到" inttostr(Memo2.Lines.Count) "条路径";
end;
end;
end;

procedure TForm1.MsgBox(strMsg: string);
begin
Application.MessageBox(pchar(strMsg), "提示信息", mb_iconinformation);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
if trim(Edit2.Text)<>"" then
Memo1.Lines.Add(trim(Edit2.Text));
end;

procedure TForm1.Button1Click(Sender: TObject);
var
i: integer;
Sum:integer;
begin
if bool then
begin
Memo3.Clear;
Memo2.Clear;
n :=0;
Sum :=Memo1.lines.count;

SetLength(Thread1,Sum); // 动态设置线程的数量
ProgressBar1.Min :=0;
ProgressBar1.Max :=sum;
ProgressBar1.Step :=1;
ProgressBar1.Position :=0;
for i := 0 to Sum - 1 do
begin
Thread1 := T1.Create(Memo1,Memo2,Memo3,i);
Thread1.OnTerminate := ThreadExit;
//ProgressBar1.StepIt;
//sleep(30);
end;
end;
bool := False; // 关闭开关
end;

procedure TForm1.ThreadExit(sender: TObject);
begin
ProgressBar1.StepIt;
Memo3.Lines.Add(trim(Edit1.Text) Memo1.Lines[n]);
GroupBox3.Caption :="信息：已检测" inttostr(Memo3.Lines.Count) "个页面";
inc(n); // 线程结束后自增1
if N = Memo1.lines.count then
begin
bool := true; // 打开开关
exit;
end;
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
if OpenDialog1.Execute then
Memo1.Lines.LoadFromFile(OpenDialog1.FileName);
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
Memo1.Lines.Delete(Memo1.Lines.Count-1);

end;

end.

//处理线程部分
unit2.pas


unit Unit2;

interface

uses
Classes,StdCtrls,Windows,SysUtils,wininet,IdHTTP;

var
CS:TRTLCriticalSection; //定义全局临界区

type
T1 = class(TThread)
private
TmpM1,TmpM2,TmpM3: TMemo;
TmpNum: integer;
Str :string;
procedure DataMemo;
protected
procedure Execute; override;
public
constructor Create(M1,M2,M3: TMemo; Num: integer);
end;

function Get(URL: string): boolean;
function CheckUrl(url: string; TimeOut: integer = 5000): boolean;

implementation

uses Unit1;

{ T1 }

constructor T1.Create(M1,M2,M3: TMemo; Num: integer);
begin
TmpNum := Num; // 传递参数
TmpM1 :=M1; // 绑定控件
TmpM2 :=M2;
TmpM3 :=M3;
FreeOnTerminate := True; // 自动删除
InitializeCriticalSection(CS); //初始化临界区
inherited Create(False); // 直接运行
end;

function Get(URL: string): boolean;
var
IDHTTP: TIDHttp;
ss: String;
begin
Result:= False;
IDHTTP:= TIDHTTP.Create(nil);
try
try
idhttp.HandleRedirects:= true; //必须支持重定向否则可能出错
idhttp.ReadTimeout:= 30000; //超过这个时间则不再访问
ss:= IDHTTP.Get(URL);
if IDHTTP.ResponseCode=200 then
Result :=true;
except
end;
finally
IDHTTP.Free;
end;
end;

//====================== 判断网址是否存在的函数 =======================
function CheckUrl(url: string; TimeOut: integer = 5000): boolean;
var
hSession, hfile, hRequest: hInternet;
dwindex, dwcodelen: dword;
dwcode: array[1..20] of char;
res: pchar;
re: integer;
Err1: integer;
j: integer;
begin
if pos("http://", lowercase(url)) = 0 then
url := "http://" url;
Result := false;
InternetSetOption(hSession, Internet_OPTION_CONNECT_TIMEOUT, @TimeOut, 4);
hSession := InternetOpen("Mozilla/4.0", INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
//设置超时
if assigned(hsession) then
begin
j := 1;
while true do
begin
hfile := InternetOpenUrl(hsession, pchar(url), nil, 0, INTERNET_FLAG_RELOAD, 0);
if hfile = nil then
begin
j := j 1;
Err1 := GetLastError;
if j > 5 then break;
if (Err1 <> 12002) or (Err1 <> 12152) then break;
sleep(2);
end
else begin
break;
end;
end;
dwIndex := 0;
dwCodeLen := 10;
HttpQueryInfo(hfile, HTTP_QUERY_STATUS_CODE, @dwcode, dwcodeLen, dwIndex);
res := pchar(@dwcode);
re := strtointdef(res, 404);
case re of
400..450: result := false;
else result := true;
end;
if assigned(hfile) then
InternetCloseHandle(hfile);
InternetCloseHandle(hsession);
end;
end;

function GetBackSpaceCount(str:string):string;
var i,iCount:integer;
begin
iCount :=50-length(str);
for i:=0 to iCount-1 do

begin
Result :=Result " ";
end;
end;

procedure T1.DataMemo;
begin
TmpM2.Lines.Add(str GetBackSpaceCount(str) "线程" inttostr(TmpNum 1) "检测结果");
Form1.GroupBox2.Caption :="存在：共找到" inttostr(TmpM2.Lines.Count) "条路径";
end;

procedure T1.Execute;
begin
Str :=trim(Form1.Edit1.Text) TmpM1.Lines[TmpNum];
EnterCriticalSection(cs); //进入临界区
if CheckUrl(Str) then
begin
Synchronize(DataMemo); // 同步
end;
LeaveCriticalSection(CS); //退出临界区
//sleep(20); // 线程挂起;
end;

end.

源代码网整理以下