成功实现使用获取百度的验证码图片(只获得图片,不进行识别,识别之后再研究吧O(∩_∩)O)

[delphi]
procedure TForm1.btn1Click(Sender: TObject); 
 
  procedure doSomething(ms: TMemoryStream); 
  var 
    Buffer:Word; 
    AjpgFile: TJPEGImage; 
  begin 
    ms.Position := 0; 
    if ms.Size = 0 then 
      Exit; 
    ms.ReadBuffer(Buffer,2); //读取文件的前2个字节,放到Buffer里面 
    if Buffer=$4D42 then //如果前两个字节是以4D42[低位到高位] 
    begin 
      ShowMessage('BMP'); //那么这个是BMP格式的文件 
    end 
    else if Buffer=$D8FF then //如果前两个字节是以D8FF[低位到高位] 
     begin 
      ShowMessage('JPEG'); //........一样 下面不注释了 
      ms.Position := 0; 
      AjpgFile := TJPEGImage.Create; 
      AjpgFile.LoadFromStream(ms); 
      Image1.Picture.Graphic := AjpgFile; 
     end 
    else if Buffer=$4947 then 
    begin 
      ShowMessage('GIF'); 
    end 
    else if Buffer=$5089 then 
    begin 
      ShowMessage('PNG'); 
    end; 
  end; 
var 
  Openurl : string; 
  elem: IHTMLElement; 
  coll: IHTMLElementCollection; 
  i: Integer; 
  url, Text: string; 
  d2,D:IHTMLDocument2; 
  d1:IHTMLDocument; 
  e:IHTMLElement; 
  e2:IHTMLElement2; 
  cp: IHTMLControlRange; 
  img:IHTMLImgElement; 
  ce:IHTMLControlElement; 
  bmp:TBitmap ; 
  r0:TRect; 
  newbmp:TBitmap; 
  r1:TRect; 
  checkstr:string; 
  MyHandle :THandle ; 
  bmpPtr:Pointer; 
  ms:TMemoryStream;   //内存流对象 
begin 
  ms := TMemoryStream.Create;  //建立内存流对象 
  IdHTTPBaiDu := TIdHTTP.Create(nil); 
  IdHTTPBaiDu.ReadTimeout := 2000000; 
  IdHTTPBaiDu.IOHandler := IdSSLIOHandlerSocketOpenSSL1.Create(nil); 
  Openurl := 'https://passport.baidu.com/v2/?reg&u=http://www.baidu.com/&tpl=mn'; 
//  Openurl := 'http://zc.qq.com/chs/index.html'; 
//    Openurl := 'http://www.doubao.com/user/reg';//豆包网 
  try 
    BaiDuWebBrowser.Navigate(Openurl); 
    while BaiDuWebBrowser.Busy do 
    begin 
      Application.ProcessMessages; 
    end; 
    BaiDuWebBrowser.Stop; 
    if BaiDuWebBrowser.Document = nil then 
      Exit; 
    //获取源代码 
    D := BaiDuWebBrowser.Document as IHTMLDocument2; 
    e :=d.body as IHTMLElement; 
    e2 :=e as IHTMLElement2; 
    cp :=e2.createControlRange as IHTMLControlRange; 
    d2 :=BaiDuWebBrowser.Document as IHTMLDocument2; 
    //下面是验证码 
    coll := d.all; 
    coll :=(coll.tags('img') as IHTMLElementCollection); 
    for i := 0 to coll.Length - 1 do 
    begin 
    //循环取出每个url 
      elem := (coll.item(i,0) as IHTMLElement); 
      url :=Trim(string(elem.getAttribute(WideString('src'), 0))); 
      //Text := Trim(string(elem.outertext)); 
      if Pos('doubao' , url) > 0 then  //豆包网 
      begin 
        if Pos('auth/checkcode',url) > 0 then 
        begin 
          IdHTTPBaiDu.Get(url,ms); 
          doSomething(ms); 
          Break; 
        end 
      end 
      else if Pos('qq.com' , url) > 0 then   //腾讯QQ 
      begin 
        if pos('getimage', url) > 0 then 
        begin 
          IdHTTPBaiDu.Get(url,ms); 
          doSomething(ms); 
          Break; 
        end 
      end 
      else if Pos('baidu.com' , url) > 0 then //百度 
      begin 
        if Pos('genimage',url) > 0then 
        begin 
          IdHTTPBaiDu.Get(url,ms); 
          doSomething(ms); 
          Break; 
        end; 
      end; 
    end; 
  finally 
   
  end; 
end;