验证码 

ASP.net 验证码(C#)

public class validatecode : system.web.ui.page    {    private void page_load(object sender, system.eventargs e)    {    this.createcheckcodeimage(generatecheckcode());    }       #region web 窗体设计器生成的代码    override protected voi...

asp.net 生成图片验证码

  1 protected void page_load(object sender, eventargs e) 2 { 3 string tmp = rndnum(4); 4 httpcookie a = new httpcookie("imagev", tmp); 5 response.cookies.add(a); 6 this.validatecode(tmp); 7 } 8 private void validatecode(string vnum) 9 { 10 bitmap i...

无组件生成BMP验证码

call com_creatvalidcode("validcode") sub com_creatvalidcode(psn) 'author: layen 'qq: 84815733 'e-mail: support@ssaw.net ' 禁止缓存 response.expires = -9999 response.addheader "pragma","no-cache" response.addheader "cache-ctrol","no-cache" response.contenttype = "imag...

ASP,PHP与.NET伪造HTTP-REFERER方法及防止伪造REFERER方法探讨

http-referer这个变量已经越来越不可靠了，完全就是可以伪造出来的东东。 以下是伪造方法： asp: dim http set http=server.createobject("msxml2.xmlhttp") '//msxml2.serverxmlhttp也可以 http.open "get",url,false http.setrequestheader "referer","http://www.devdao.com/" http.send() php(前...